Cross-linking Agents: Density 0.9-1.1 g/cm³, Flash Point >30°C

Component Specifications

Definition

Cross-linking agents are chemical compounds used in silicone resin formulations to create covalent bonds between polymer chains, resulting in a thermoset network. This process improves the resin's hardness, elasticity, chemical resistance, and thermal stability. Common cross-linking agents for silicone resins include organosilicon compounds such as tetraethoxysilane (TEOS), methyltrimethoxysilane (MTMS), and vinyl-functional siloxanes. They are typically added in controlled amounts during the curing stage and activated by heat, moisture, or catalysts.

Working Principle

Cross-linking agents contain multiple reactive functional groups (e.g., alkoxy, vinyl, or silanol) that react with functional groups on silicone polymer chains (e.g., Si-OH or Si-H). Upon activation (heat, moisture, or catalyst), these reactions form siloxane (Si-O-Si) bridges, linking separate polymer chains into a three-dimensional network. This network restricts chain mobility, increasing rigidity, thermal stability, and resistance to solvents and chemicals.

Materials

Typically organosilicon compounds: tetraethoxysilane (TEOS), methyltrimethoxysilane (MTMS), vinyltrimethoxysilane (VTMS), or proprietary siloxane oligomers. Purity >98%, moisture content <0.1%.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Density	0.9-1.1 g/cm³
Reactivity	Hydrolytic sensitivity
Shelf Life	12 months in sealed container
Flash Point	>30°C
Boiling Point	120-170°C

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 9001, ASTM D5288

Parent Products

This component is used in the following industrial products

Silicone Resin

A synthetic polymer derived from silicon, oxygen, and organic groups, known for its thermal stability, electrical insulation, and weather resistance.

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Daily Chemical Elastomer Gels

Specialized polymer gels with elastic properties designed for daily chemical applications such as personal care, cosmetics, and household products.

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Engineering Analysis

Risks & Mitigation

Moisture sensitivity leading to premature curing
Skin and eye irritation
Flammability at high temperatures

FMEA Triads

Trigger: Excessive moisture during storage
Failure: Premature hydrolysis and gelation of cross-linking agent
Mitigation: Use desiccants and nitrogen blanket; store in sealed containers.

Trigger: Incorrect dosage
Failure: Insufficient crosslinking (soft resin) or over-crosslinking (brittle resin)
Mitigation: Use precise metering and quality control testing.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.5% of specified concentration

Test Method

Titration for functional group content; viscosity measurement per ASTM D2196

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-linking Agents

Manufacturer profiles associated with Cross-linking Agents.

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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

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Frequently Asked Questions

What is the typical dosage of cross-linking agent in silicone resin?

Typically 1-10% by weight of resin, depending on desired crosslink density and application.

How do I store cross-linking agents?

Store in a cool, dry place away from moisture and heat. Keep containers tightly sealed.

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-linking Agents