Hydroxy PDMS Base is hydroxyl‑terminated polydimethylsiloxane, CAS 70131‑67‑8. This 107‑series silicone base is optimized for condensation‑cure RTV‑2 two‑component mold making rubber. It exhibits excellent compatibility with silica reinforcing fillers. After mixing with cross‑linker and catalyst, the cured silicone mold shows low shrinkage, high elasticity and superior detail reproduction, widely used in art craft, resin casting, gypsum pouring and industrial duplicate mould manufacturing.

Product Detail

Product Overview

Hydroxy PDMS Base belongs to hydroxyl‑terminated polydimethylsiloxane series, also named 107 silicone base polymer, CAS 70131‑67‑8. It acts as core base resin for two‑component condensation‑cure RTV‑2 mold‑making rubber. Controlled hydroxyl content and stable viscosity ensure predictable curing speed. Combined with reinforcing silica fillers and organotin catalyst, it produces flexible moulds with precise pattern reproduction. Strict quality control guarantees consistent performance for mass mould silicone production.

Key Features

Specially tailored for RTV‑2 two‑component condensation cure mold rubber
Uniform reactive hydroxyl end groups for controllable cross‑linking reaction
Excellent wetting and dispersion performance for reinforcing silica
Cured silicone features low linear shrinkage after full curing
High tear strength and good elasticity for repeated demoulding
Capable of reproducing fine surface details of master patterns
Good compatibility with common silane cross‑linkers and catalysts
Stable batch‑to‑batch consistency for industrial formulation

Main Applications

RTV‑2 two‑component condensation‑cure mold‑making silicone rubber
Art craft and decorative ornament reproduction molds
Resin, gypsum, wax casting mould silicone
Industrial prototype duplication and tooling mould
Custom flexible mould for small‑batch casting production
Other condensation‑cure silicone compound requiring high elasticity

Processing Suggestions

Complete feeding, kneading and mixing operations under moisture‑free working conditions. Blend with reinforcing fillers, cross‑linking agent and organotin catalyst. Adjust filler dosage according to target hardness, tear strength and shrinkage index. Avoid moisture contamination during the whole procedure, otherwise abnormal curing will occur.

Storage & Packing

Store in cool, dry and ventilated warehouse. Keep iron drum tightly sealed. Keep away from humidity, heat source and direct sunlight. Reseal container promptly after partial material discharge. Proper storage conditions protect polymer reactivity and guarantee shelf‑life.

Previous : 107 Polymer Raw Material for Structural Glazing Sealant CAS 70131-67-8 Next : 107 Silicone Base for Electronic Potting Compound CAS 70131-67-8 Raw Material

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Hydroxy PDMS Base for RTV-2 Mold Making Rubber CAS 70131-67-8 Raw Material

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Jishengya Technology

Shenzhen Jishengya Technology Co., Ltd. is located in Shenzhen, a special economic zone, and is a comprehensive technology enterprise integrating independent R&D, production and sales.