INDUSTRY COMPONENT

Cross-linking Agent

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

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
ParameterTypical rangeNotes & selection driver
Shelf Life6-24 months
Dosage Range0.5-5.0 phr
Reaction Time30 seconds to 30 minutes
Active Content40-100%
Cure Temperature120-180°C
Decomposition Temperature100-200°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 11357, ISO 37, DIN 53504, ASTM D412

Parent Products

This component is used in the following industrial products

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

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
Check the legal entity, factory address, ownership, certifications, and direct contacts.

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

Manufacturers of Cross-linking Agent

Manufacturer profiles associated with Cross-linking Agent.

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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 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.

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.

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