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Cross-linker Component – Rubber and Plastic Product Manufacturing

Component Specifications

Definition

A cross-linker is a chemical compound that reacts with functional groups on silicone polymer chains to form covalent bonds between them, creating a three-dimensional network. In liquid silicone resin systems, it is essential for converting the liquid prepolymer into a solid elastomer with enhanced mechanical strength, thermal stability, and chemical resistance.

Working Principle

The cross-linker contains reactive groups (e.g., Si-H, vinyl) that undergo addition or condensation reactions with complementary groups on the silicone base polymer. Under heat or catalyst, these reactions form cross-links, transforming the linear polymer into a network structure.

Materials

Typically organosilicon compounds such as methylhydrogen polysiloxane or vinyl-terminated siloxanes; purity >99%; viscosity 10-100 mPa·s at 25°C.

Technical Parameters

Density 0.95-1.05 g/cm³
Shelf Life 12 months
Flash Point >100°C
Reactive Groups Si-H or Vinyl
Viscosity (25°C) 10-100 mPa·s

Standards

ISO 10993, DIN 53504

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Cross-linker.

Parent Products

This component is used in the following industrial products

Liquid Silicone Resin

A low-viscosity, flowable silicone polymer that cures to form a durable, flexible, and heat-resistant solid.

View Product Details

Engineering Analysis

Risks & Mitigation

Skin irritation
Flammable if exposed to open flame
Reacts exothermically with catalysts

FMEA Triads

Trigger: Insufficient mixing ratio
Failure: Incomplete curing, soft or tacky surface
Mitigation: Use precise metering equipment and verify ratio via rheology

Trigger: Contamination with moisture
Failure: Premature gelation or bubbles
Mitigation: Store in sealed containers under dry nitrogen

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

±0.5% of specified viscosity

Test Method

ASTM D2196 for viscosity; FTIR for functional group verification

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation

4/5

Manufacturing capability

4/5

Inspection readiness

5/5

Supplier transparency

3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the typical dosage of cross-linker in liquid silicone resin?

Typically 1-5% by weight of the base polymer, depending on desired hardness and crosslink density.

Can this cross-linker be used for platinum-catalyzed systems?

Yes, if it contains vinyl groups; for Si-H cross-linkers, a platinum catalyst is required.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Cross-linker