Cross-linker: Density 0.95-1.05 g/cm³, Shelf Life 12 months

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

Parameter	Typical range	Notes & selection driver
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

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 10993, DIN 53504

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

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.5% of specified viscosity

Test Method

ASTM D2196 for viscosity; FTIR for functional group verification

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Cross-linker

Manufacturer profiles associated with Cross-linker.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

Related Components

Mold Release Coating

Specialized coating applied to molds to facilitate easy release of silicone seal rings during manufacturing.

Silicone Polymer Base

Silicone polymer base is a high-temperature resistant polymer material used as the foundational component in silicone rubber compounds for industrial applications.

Reinforcing Filler

Reinforcing filler is a material added to silicone rubber compounds to enhance mechanical properties, thermal stability, and durability in high-temperature applications.

Processing Aids

Processing aids are specialized additives used to improve the manufacturability and performance of high-temperature silicone rubber compounds during industrial processing.

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.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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