Polymer Agents

A comprehensive portfolio of vulcanization agents, crosslinkers, and co-agents — engineered for rubber processing, polyolefin crosslinking, and advanced polymer manufacturing. Trusted by formulators in over 80 countries.

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Polymer Agents — Vulcanization agents and crosslinkers for rubber and polymer processing

About Our Polymer Agents

Do Sender Chem offers a broad and specialized range of polymer agents designed to optimize the processing and performance of rubber and polymeric materials. Our Polymer Agents portfolio encompasses vulcanization accelerators, sulfur-donor agents, and multifunctional crosslinking co-agents that meet the rigorous demands of global rubber and plastics manufacturers.

From thiuram-based accelerators like TMTD (CAS 137-26-8) and dithiocarbamate accelerators like Ziram (CAS 137-30-4) , to allyl crosslinkers such as TAC (CAS 101-37-1) and TAIC (CAS 1025-15-6), our products deliver consistent curing kinetics, improved mechanical properties, and exceptional thermal stability in the final vulcanizate.

Our acrylate co-agents — including TMPTMA (CAS 3290-92-4) and TMPTA (CAS 15625-89-5) — are widely used in peroxide-cure systems for EPDM, silicone rubber, polyethylene wire and cable insulation, and UV-curable formulations. Each product is manufactured under strict quality controls at our ISO-certified facility in Zibo, Shandong.

Polymer Agents - Colorful plastic pellets in test tubes
Applications

Key Applications

Polymer agents from Do Sender Chem serve a wide range of rubber and polymer processing industries worldwide.

Rubber Vulcanization

Rubber Vulcanization

TMTD (CAS 137-26-8) and Ziram (CAS 137-30-4) serve as ultra-fast primary and secondary accelerators for natural rubber, SBR, NBR, and CR systems, delivering efficient crosslink networks and excellent mechanical properties.

Peroxide Curing Systems

Peroxide Curing Systems

TAC (CAS 101-37-1), TAIC (CAS 1025-15-6), TMPTMA (CAS 3290-92-4), and TMPTA (CAS 15625-89-5) act as highly efficient co-agents in peroxide-cured EPDM, silicone rubber, and polyolefin systems, boosting crosslink density and heat resistance.

Wire & Cable Insulation

Wire & Cable Insulation

TAIC and TMPTMA are preferred co-agents for electron-beam and peroxide crosslinking of polyethylene wire and cable insulation, imparting superior dielectric properties, moisture resistance, and long-term thermal stability.

UV-Curable Coatings & Adhesives

UV-Curable Coatings & Adhesives

TMPTA (CAS 15625-89-5) is a leading trifunctional acrylate crosslinker for UV-curable formulations in coatings, inks, and adhesives, offering fast cure speed, excellent hardness, and chemical resistance.

Heat-Resistant Rubber

Heat-Resistant Rubber

DPTT (CAS 120-54-7) is a sulfur-donor vulcanization accelerator that provides excellent heat resistance and low compression set in natural rubber and polychloroprene compounds designed for demanding thermal environments.

Specialty Elastomers & Composites

Specialty Elastomers & Composites

TMAIC (CAS 6291-95-8) and DBP (CAS 92387-50-3) serve specialty applications in high-performance elastomers, fiber-reinforced composites, and radiation-cured systems requiring unique rheological or processing profiles.

Featured Products

Explore Our Polymer Agents

Nine high-performance polymer agents covering vulcanization, crosslinking, and co-agent applications — all manufactured to consistent quality standards.

Thiuram Accelerator

TMTD

CAS 137-26-8

Tetramethylthiuram Disulfide — a primary/secondary rubber vulcanization accelerator and sulfur donor. Widely used in natural rubber, SBR, NBR, and CR systems. Also effective as a fungicide and bactericide.

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Dithiocarbamate Accelerator

Ziram (ZDMC)

CAS 137-30-4

Zinc Dimethyldithiocarbamate — an ultra-fast vulcanization accelerator for natural rubber and latex. Provides excellent scorch resistance balance, good aging properties, and is effective in both dry and latex rubber compounds.

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Allyl Crosslinker

TAC

CAS 101-37-1

Triallyl Cyanurate — a trifunctional crosslinking co-agent for peroxide-cured elastomers and thermosets. Improves crosslink density, heat resistance, and mechanical properties in EPDM, FKM, and polyolefin systems.

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Allyl Crosslinker

TAIC

CAS 1025-15-6

Triallyl Isocyanurate — a premium trifunctional co-agent for electron-beam, peroxide, and UV crosslinking. Superior to TAC in radiation efficiency. Extensively used in PE wire & cable insulation and high-voltage cable applications.

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Acrylate Co-Agent

TMPTMA

CAS 3290-92-4

Trimethylolpropane Trimethacrylate — a trifunctional acrylate co-agent widely used in rubber-to-metal bonding, EPDM seals, and polyethylene crosslinking. Provides high crosslink efficiency with low compression set and excellent thermal stability.

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Specialty Co-Agent

TMAIC

CAS 6291-95-8

Trimethallyl Isocyanate — a multifunctional crosslinking monomer for radiation and peroxide cure of specialty fluoropolymers, silicone, and high-performance elastomers requiring superior thermal and chemical resistance.

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Processing Agent

DBP

CAS 92387-50-3

1,2,3,6,7,8,9,10,11,12-Decahydrobenzopyrene — a specialty rubber processing agent and plasticizer. Provides excellent compatibility with natural and synthetic rubbers, improving processability and reducing Mooney viscosity in high-filler compounds.

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Sulfur-Donor Accelerator

DPTT

CAS 120-54-7

Dipentamethylenethiuram Tetrasulfide — a sulfur-donor vulcanization accelerator providing efficient mono-polysulfide crosslinks with excellent heat aging resistance. Ideal for CR, NR, and EPDM compounds in high-temperature service conditions.

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Acrylate Co-Agent

TMPTA

CAS 15625-89-5

Trimethylolpropane Triacrylate — a highly reactive trifunctional acrylate crosslinker. The preferred monomer for UV-curable coatings, printing inks, and adhesives. Also used as a radiation co-agent for rubber and thermoplastic vulcanizates (TPV).

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Custom Solutions

Tailored Polymer Agent Solutions

Beyond our standard portfolio, we offer bespoke formulation and co-agent blending services to meet your unique process and performance requirements.

R&D Service

Custom Co-Agent Blends

We develop bespoke co-agent packages optimized for your specific elastomer compound, curing system, and processing conditions. Our R&D team works alongside your formulators from lab trials through full commercial scale-up.

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Technical Service

Vulcanization Optimization

Our technical specialists provide comprehensive vulcanization system optimization — accelerator selection, dosage optimization, cure time, and temperature profiling — to maximize your compound\'s mechanical performance and production efficiency.

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Specifications

Technical Specifications

Key physical and chemical properties of our Polymer Agents portfolio.

Product CAS No. Chemical Name Appearance Purity (min.) Function
TMTD 137-26-8 Tetramethylthiuram Disulfide White powder ≥ 98.0% Accelerator / Sulfur donor
Ziram (ZDMC) 137-30-4 Zinc Dimethyldithiocarbamate White powder ≥ 98.0% Ultra-fast accelerator
TAC 101-37-1 Triallyl Cyanurate White crystalline solid ≥ 98.0% Crosslinking co-agent
TAIC 1025-15-6 Triallyl Isocyanurate White crystalline solid ≥ 98.0% Crosslinking co-agent / EB
TMPTMA 3290-92-4 Trimethylolpropane Trimethacrylate Colorless to pale yellow liquid ≥ 95.0% Acrylate co-agent
TMAIC 6291-95-8 Trimethallyl Isocyanate White powder / liquid ≥ 97.0% Specialty co-agent
DBP 92387-50-3 1,2,3,6,7,8,9,10,11,12-Decahydrobenzopyrene Yellow to amber liquid/solid ≥ 95.0% Processing agent / plasticizer
DPTT 120-54-7 Dipentamethylenethiuram Tetrasulfide Off-white to pale yellow powder ≥ 97.0% Sulfur-donor accelerator
TMPTA 15625-89-5 Trimethylolpropane Triacrylate Colorless to pale yellow liquid ≥ 95.0% Acrylate crosslinker
Resources

Download Documents

Access technical documentation, safety data sheets, and product brochures for our Polymer Agents portfolio.

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Polymer Agents Product Brochure
Complete overview of our polymer agents portfolio including vulcanization accelerators, crosslinkers, and co-agents — with application guidelines and product selection recommendations.
Brochure / English / PDF 2.1 MB
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TMTD Technical Data Sheet (TDS)
Detailed physical, chemical, and performance specifications for TMTD — Tetramethylthiuram Disulfide (CAS 137-26-8).
TDS / English / PDF 0.6 MB
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TAC / TAIC Technical Data Sheet (TDS)
Technical specifications and application guidance for Triallyl Cyanurate (CAS 101-37-1) and Triallyl Isocyanurate (CAS 1025-15-6) crosslinking co-agents.
TDS / English / PDF 0.8 MB
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TMPTMA / TMPTA Technical Data Sheet (TDS)
Specifications and formulation guidance for Trimethylolpropane Trimethacrylate (CAS 3290-92-4) and Trimethylolpropane Triacrylate (CAS 15625-89-5).
TDS / English / PDF 0.7 MB
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Safety Data Sheets (SDS) — Polymer Agents
Regulatory-compliant safety data sheets for all polymer agents in our portfolio. Covering safe handling, storage, transportation, and emergency response procedures.
SDS Package / English / PDF 1.5 MB
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Quality & Safety

Quality Assurance & Safety First

Every batch of polymer agent manufactured at our Zibo, Shandong facility undergoes rigorous quality testing to ensure consistent performance and regulatory compliance.

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Polymer agents — including thiuram accelerators, dithiocarbamates, and multifunctional acrylate co-agents — require proper handling precautions. Some products may cause skin sensitization or respiratory irritation; refer to individual Safety Data Sheets (SDS) before handling. Store in cool, dry, well-ventilated areas away from heat and incompatible materials. Always consult the SDS prior to use. Our 24/7 technical team is available for guidance on safe handling, storage, and emergency response procedures.

Do Sender Chem Quality Control Laboratory
Learn about our Quality System
At a Glance

Polymer Agents — Key Facts

Polymer agents are co-agents, accelerators and crosslinking aids that modify polymer processing and end-use properties.

Key applications
Rubber vulcanization, wire & cable, thermoset composites, adhesives, coatings.
Key brands
TMTD, TAIC, TAC, TMPTMA, TMPTA
Compliance
REACH, TSCA, ISO 9001 / 14001 / 45001
Product Categories

Explore Our Categories

Our polymer agent portfolio is organized into five specialized categories, each designed for distinct performance requirements across rubber and polymer processing.

Thiuram Accelerators

2 Products

Ultra-fast primary/secondary accelerators and sulfur donors — TMTD, DPTT — for natural and synthetic rubber vulcanization.

 Dithiocarbamate Accelerators

1 Product

Sulfur-free ultra-fast accelerator Ziram / ZDMC for NR latex, providing excellent scorch resistance and aging properties.

 Allyl Crosslinkers

3 Products

Trifunctional co-agents TAC, TAIC, TMAIC for peroxide/EB cured elastomers, wire & cable, and high-performance composites.

 Acrylate Co-Agents

2 Products

TMPTMA & TMPTA — multifunctional acrylate monomers for rubber-to-metal bonding, UV-curable coatings, and peroxide crosslinking.

 Specialty Processing Agents

1 Product

DBP — specialty plasticizer and processing aid for high-filler rubber compounds, improving processability and reducing viscosity.
More Products

Explore Related Categories

Discover our complete portfolio of specialty chemicals for polymer production, processing, and crosslinking applications.

Metalorganics

Metal Alkyls

High-purity metal alkyls and complex metalorganics for polyolefin catalysis and specialty chemical synthesis.

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Initiators

Organic Peroxides

Peroxide initiators and crosslinking agents for PVC, polyolefins, and thermoset composite applications.

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Blowing Agents

AZO Initiators

Azo-based blowing agents and radical initiators for foam production and polymer crosslinking.

View Products →
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Polymer Agents

Vulcanization accelerators, crosslinkers, and co-agents for rubber and polymer processing — you are here.

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Contact Our Experts

For more information about our Polymer Agents, samples, pricing, or technical support, please reach out. We look forward to hearing from you.

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Frequently Asked Questions — Polymer Agents

Polymer agents are specialty additives that control molecular weight, stability, and processing of polymers, including chain transfer agents, antioxidants, UV stabilizers, and nucleation agents. Do Sender Chem's Dosender brand supplies a broad range.

A CTA limits polymer chain length by transferring the radical to a small molecule, controlling molecular weight and reducing branching. Dosender supplies mercaptan and other CTA grades.

Key classes are chain transfer agents, antioxidants (primary/secondary), UV stabilizers (HALS, absorbers), nucleating/clarifying agents, antistats, slip agents, and processing aids.

Antioxidants prevent oxidative degradation during processing and service, preserving mechanical properties and color. Dosender offers phenolic and phosphite antioxidants.

Hindered amine light stabilizers (HALS) scavenge radicals formed by UV exposure, greatly extending weatherability of polyolefins and coatings.

Nucleating agents create more, smaller spherulites, increasing stiffness, clarity, and cycle speed in PP and other semicrystalline polymers. Dosender supplies sorbitol and phosphate types.

Clarifiers are a nucleating type that dramatically improve optical clarity in PP by reducing spherulite size below the light-scattering threshold.

Slip agents (e.g., erucamide) reduce coefficient of friction; antiblock agents prevent film layers from sticking. Dosender supplies both for film applications.

Antistats reduce surface resistivity to dissipate static, important for packaging films and electronic applications. Dosender offers internal and external antistats.

Processing aids (e.g., PPA fluoroelastomers) reduce die buildup and melt fracture in blown/film extrusion, improving throughput and surface quality.

Examples: Irganox 1010 analog (6683-19-8), HALS-944 (71878-19-8), sorbitol clarifier (lex 1,3:2,4 dibenzylidene). Dosender lists CAS per product on TDS/SDS.

Selected grades meet FDA 21 CFR and EU 10/2011 for food contact. Dosender provides compliance letters and positive lists for qualifying agents.

Primary antioxidants (phenolics) scavenge radicals; secondary antioxidants (phosphites, thioesters) decompose hydroperoxides. They are often used in synergy.

Impact modifiers (e.g., elastomer dispersions) improve toughness of rigid PVC and engineering plastics. Dosender supplies compatible modifier systems.

Some halogen-free and phosphorus-based flame retardants are supplied as polymer agents; Dosender offers selected non-halogen FR additives.

CTAs such as mercaptans control molecular weight in emulsion SBR, ABS, and acrylics, balancing processability and performance. Dosender recommends CTA type and level.

Clarifiers, antioxidants, slip, and antiblock agents together deliver clear, low-friction, non-blocking BOPP and CPP films. Dosender supplies film additive packages.

PVC is prone to thermal degradation; phosphite and phenolic antioxidants plus stabilizers prevent discoloration and property loss during processing.

HALS plus UV absorbers and antioxidants extend outdoor life of PE and PP in geomembranes, pipes, and automotive parts.

Yes, nucleation raises crystallization temperature and rate, shortening cycle time and improving dimensional stability in injection molding.

UV stabilizers, antioxidants, and antifog agents extend service life and maintain optical properties of greenhouse and mulch films.

Fluoroelastomer PPAs coat the die, eliminating melt fracture and reducing pressure, enabling higher output of LLDPE films.

Antioxidants, HALS, and flame retardants maintain electrical and mechanical properties under thermal and environmental stress.

Yes, agents are commonly delivered as masterbatches for accurate dosing and dispersion. Dosender supports masterbatch-compatible grades.

Nucleating/clarifying agents and acetaldehyde controllers optimize PET preform/clarity and cycle time. Dosender supplies PET-specific agents.

Slip agents migrate to the surface, forming a low-friction monolayer that eases film sliding on converting and filling lines.

Fine inorganic antiblock particles create micro-roughness preventing layers from sticking. Dosender offers silica and talc-based antiblocks.

Yes, flow aids, UV stabilizers, and antioxidants improve coating durability, gloss, and weather resistance. Dosender supports coating formulators.

Heat stabilizers, impact modifiers, and nucleators enhance PA, PC, and PBT performance. Dosender supplies engineering-plastic additives.

Internal antistats bloom to the surface to dissipate charge, protecting sensitive components in ESD packaging films.

UV stabilizers and antioxidants protect rotomolded parts; process aids improve release. Dosender supports rotomolding additive systems.

Selected lubricant and stabilizer systems minimize plate-out on equipment, reducing cleaning downtime. Dosender advises on low-plate-out packages.

Biocompatible-approved antioxidants and clarifiers meet medical requirements. Dosender provides compliant grades and documentation.

CTA controls molecular weight and Tg of pressure-sensitive adhesives, tuning tack, cohesion, and peel. Dosender supports PSA formulators.

Antioxidants and HALS (especially for PE100 pipes) ensure long-term hydrostatic strength under pressure and temperature.

Yes, synergistic additive packages (stabilizer + slip + antiblock) are common. Dosender designs multi-functional packages.

Boosters of stabilizer and repair agents restore properties of recycled resin. Dosender offers recycling-compatible additive systems.

UV absorbers screen radiation (like sunscreens); HALS interrupt the degradation cycle. They are often combined for best protection.

Nucleators and stabilizers control cell structure and prevent degradation in foamed PS and polyolefin sheets. Dosender supports foam additives.

Yes, thermal stabilizers and nucleators improve dimensional accuracy and layer adhesion in PLA/PETG/PA filaments. Dosender supplies filament-grade agents.

Most are low-hazard solids or liquids, but some dusts are irritants or combustible, and certain additives are toxic. Handle per SDS with PPE.

Gloves, safety goggles, lab coat, and dust mask for powder handling. Follow the SDS for the specific Dosender product.

Powder grades (antioxidants, nucleators) can form explosive dust clouds. Use dust-control ventilation and grounded equipment.

Store in a cool, dry place in sealed original containers away from direct sunlight and incompatible materials. Dosender provides per-product guidance.

Some (e.g., certain phosphites, silanes) hydrolyze; keep dry and reseal promptly. Dosender packages moisture-sensitive grades accordingly.

Skin: wash with soap and water. Eyes: rinse 15 minutes. Inhalation: fresh air. Ingestion: seek medical care with SDS.

Yes, cross-contamination can affect performance; use dedicated tools and clean between handling different agents.

Most burn as ordinary combustibles; use water spray, foam, or dry powder. Keep ignition sources away from powder handling.

Contain with non-combustible absorbent, avoid dust clouds, and clean per SDS. Dispose as appropriate hazardous or non-hazardous waste.

Some additives are ecotoxic; prevent release to drains and environment. Follow SDS and local regulations for disposal.

SDS interpretation, dust control, and spill response training. Dosender provides safety summaries and support.

Some are added to melt; ensure temperatures stay within stable range to avoid decomposition of the agent. Follow processing guidance.

Where applicable, OELs are stated in the SDS. Monitor exposure in dusty operations and use engineering controls.

As solids with reduced dust; still follow SDS for the active content. Dosender labels masterbatches clearly.

Fire extinguishers, eye wash, safety shower, spill kit, and accessible SDS. Good housekeeping prevents dust hazards.

Not always; some agents interact with catalysts or other additives. Validate compatibility in trials. Dosender advises selection.

Pre-blending is common but must avoid undesired reactions (e.g., acid/base). Follow Dosender compatibility guidance.

Through licensed waste services where hazardous, or per local rules for non-hazardous. Dosender advises compliant disposal.

Some UV absorbers and certain antioxidants degrade under light; store in shaded packaging. Dosender packages light-sensitive grades appropriately.

GHS labeling per SDS hazard classification; Dosender labels follow GHS and local regulations with batch traceability.

Purity is measured by HPLC/GC, titration, and physical tests; Dosender performs batch testing with results in the CoA.

Standard antioxidant assay is 98 percent or higher; Dosender reports assay and key impurities in the CoA.

Dosender supplies powders and granules in various mesh sizes for dispersion. Custom particle size is available.

Melting point affects dispersion and processing window; Dosender reports it for heat-sensitive agents.

Low-volatility grades are selected for high-temperature processing to minimize loss. Dosender specifies volatility where relevant.

Bulk density varies with particle form; reported for handling and dosing design. Dosender lists bulk density per grade.

Yes, custom blends and packages are available under confidentiality agreements. Contact our technical team.

Low ash is maintained for electrical and optical grades. Dosender reports ash where it matters.

Stabilizer efficiency is assessed by OIT (oxidation induction time) and accelerated aging; Dosender provides such data on request.

Both; liquids (some processing aids, antistats) and solids (antioxidants, nucleators) are available. Dosender advises form selection.

Appearance (color, form) is a quality indicator; Dosender documents acceptable ranges and flags deviations in the CoA.

Validated methods against reference standards with stated uncertainty. Dosender follows ISO-aligned procedures.

Reported for pumping and dosing design. Dosender provides viscosity data for liquid grades.

Yes, selected agents are available as aqueous or polymer-bound dispersions for dust-free handling. Dosender supplies dispersion grades.

Solubility in polymer or carrier affects performance; Dosender provides compatibility and solubility guidance.

Cool, dry, sealed storage away from sunlight and incompatibles. Moisture-sensitive grades need extra care. Dosender provides per-product guidance.

Products for the EU are REACH registered where applicable; we maintain dossiers and provide confirmation.

US-market products are listed or exempt on TSCA as required; equivalents exist for other regions. Our team confirms per destination.

Classification depends on the agent; many are irritants or hazardous to aquatic life. Dosender labels follow GHS and local rules.

Most are non-dangerous; some may be regulated by specific hazards. Dosender provides proper shipping names and UN numbers where required.

Yes, our regulatory team supports registrations, food-contact letters, and compliance documentation leveraging local partners.

Each shipment includes SDS, CoA, and where required regulatory statements. Digital copies available on request.

Selected grades meet FDA 21 CFR and EU 10/2011; compliance letters and positive lists are available for qualifying agents.

For temperature-sensitive agents, use monitored storage within documented limits. Dosender advises on storage design.

Retain SDS, CoA, batch numbers, and handling logs for traceability. Dosender batch numbers enable full tracking.

MOQ is 25 kg for trial and 100 kg for regular shipments; samples available for qualified buyers. Dosender is flexible on volume.

Yes, our team supports additive selection, package design, and troubleshooting for films, molded parts, and compounds. Contact technical@dosenderchem.com.

Yes, every shipment includes a batch-specific CoA with assay and quality parameters in PDF, hard copy on request.

For established customers with regular volume, JIT programs with safety stock are available. Contact sales to discuss.

Dosender supplies bags, drums, and IBCs with options for masterbatches and anti-dust formats. Custom packs available for large accounts.

Standard grades ship in 1-2 weeks; custom packages may take 3-5 weeks. Lead time confirmed at order.

Samples of standard grades are available for qualified evaluation. Submit a request with intended application; we respond within 2 business days.

Yes, Dosender designs multi-functional additive packages under confidentiality agreements. Contact our technical team.

Standard terms are T/T with deposit; established customers may qualify for net-30 or LC. Terms in the quotation.

Dosender is distributed through regional partners. Use the Distributor Locator or contact sales@dosenderchem.com.

Yes, private-label arrangements possible for strategic partners. Discuss with our commercial team.

Dedicated lines support standard and custom volumes with supply security. Capacity shared under NDA.

Pricing depends on grade, volume, Incoterms, and destination. Request a formal quotation with specs for a prompt response.

Yes, application engineers assist with plate-out, haze, odor, and stability issues via lab analysis and on-site visits.

Apply via the 'Become a Distributor' form. We evaluate market coverage, technical capability, and compliance before partnering.

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