INDUSTRY COMPONENT

Cross-linking Agent

Cross-linking agent for silicone rubber vulcanization and curing processes in industrial manufacturing.

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Component Specifications

Definition
A chemical component that initiates and controls the cross-linking reaction in silicone rubber formulations, creating three-dimensional polymer networks through covalent bonding between polymer chains. This process transforms liquid or semi-solid silicone compounds into durable, elastic rubber materials with enhanced mechanical, thermal, and chemical properties.
Working Principle
Cross-linking agents function by forming chemical bridges between silicone polymer chains through addition or condensation reactions. They typically contain reactive groups (such as hydrosilane, peroxide, or platinum catalysts) that activate under specific temperature, pressure, or time conditions, creating permanent covalent bonds that establish the rubber's final network structure and properties.
Materials
Organic peroxides (dicumyl peroxide, benzoyl peroxide), platinum catalysts, hydrosilane compounds, or tin-based catalysts. Typically supplied as liquids, pastes, or masterbatches with purity levels of 95-99.9%.
Technical Parameters
  • Shelf Life 6-24 months
  • Dosage Range 0.5-5.0 phr
  • Reaction Time 30 seconds to 30 minutes
  • Active Content 40-100%
  • Cure Temperature 120-180°C
  • Decomposition Temperature 100-200°C
Standards
ISO 11357, ISO 37, DIN 53504, ASTM D412

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Cross-linking Agent.

silicone rubber cross-linking agent vulcanization catalyst peroxide curing agent platinum catalyst rubber curing process polymer cross-linking industrial rubber manufacturing Cross-linking Agent Cross-linking Agent in Rubber and Plastic Product Manufacturing

Parent Products

This component is used in the following industrial products

Silicone Rubber

A synthetic elastomer composed of silicone polymers with exceptional temperature resistance, flexibility, and chemical stability.

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Silicone Gels

Semi-solid silicone-based materials with viscoelastic properties between liquids and solids.

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Medical Silicone Gels

Medical-grade silicone-based gels used for wound care, scar management, and medical device applications.

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Engineering Analysis

Risks & Mitigation
  • Thermal decomposition with gas release
  • Skin and eye irritation
  • Incompatibility with certain fillers
  • Premature curing during storage
  • Residual catalyst affecting final properties
FMEA Triads
Trigger: Incorrect dosage measurement
Failure: Incomplete curing or over-curing
Mitigation: Implement automated dosing systems with calibration checks and real-time monitoring
Trigger: Storage temperature exceeding limits
Failure: Premature decomposition and reduced effectiveness
Mitigation: Maintain temperature-controlled storage below 25°C with continuous monitoring
Trigger: Contamination with inhibitors
Failure: Delayed or prevented cross-linking reaction
Mitigation: Establish clean handling procedures and material compatibility testing

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.1% active content variation, ±2°C temperature control
Test Method
DSC analysis for decomposition temperature, titration for active content, rheometry for cure characteristics

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 difference between peroxide and platinum-based cross-linking agents?

Peroxide agents create free radicals for thermal curing, while platinum catalysts enable addition curing at lower temperatures with better control and fewer byproducts.

How does cross-linking agent dosage affect silicone rubber properties?

Higher dosage increases cross-link density, improving hardness and heat resistance but reducing elongation; insufficient dosage causes incomplete curing and poor mechanical properties.

What safety precautions are required when handling cross-linking agents?

Use PPE including gloves and eye protection, ensure proper ventilation, store away from heat sources, and follow SDS guidelines due to potential skin irritation and thermal decomposition risks.

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.

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