OH Polymer is hydroxyl‑terminated polydimethylsiloxane, CAS 70131‑67‑8. This RTV‑2 base polymer is engineered for prototype development and rapid tooling applications. When compounded with reinforcing silica fillers, silane cross‑linker and organotin catalyst, it cures into flexible silicone rubber. The finished mold delivers outstanding fine‑pattern reproduction, low linear shrinkage and good mechanical property, widely used for product prototype duplication, small‑batch trial production, art s

Product Detail

Product Overview

OH Polymer is hydroxyl‑terminated polydimethylsiloxane base polymer, CAS 70131‑67‑8. This RTV‑2 condensation‑cure raw material is customized for prototype manufacturing and rapid tooling industry. Viscosity and hydroxyl value are strictly controlled for each batch. After mixing with reinforcing fillers and curing system, it forms elastic silicone rubber which can accurately copy micro‑surface features of original samples. Consistent raw‑material quality supports fast iteration of product prototypes and small‑batch trial production.

Key Features

Special OH terminated PDMS base polymer for prototype and rapid tooling
Stable hydroxyl end‑groups for reliable and controllable condensation curing
Superior wetting and dispersion performance for reinforcing silica fillers
Excellent micro‑detail reproduction for complex and delicate surface textures
Low linear shrinkage to maintain dimensional accuracy of prototype parts
Good tear strength, withstands frequent demoulding during repeated trials
Flexible cured rubber, easy demolding for complex‑structure prototypes
Wide formula adjustability for different hardness grade tooling molds
Compatible with conventional silane cross‑linkers and organotin catalysts
Low volatile content, stable batch‑to‑batch repeatability

Main Applications

RTV‑2 silicone molds for industrial prototype duplication
Rapid tooling for small‑batch product trial‑run production
Artwork, ornament and sample copying molds
Resin, PU, wax casting molds for prototype verification
Custom silicone compound for product development laboratories
Complex‑part rapid prototyping mold formulations

Processing Suggestions

Complete feeding, kneading and mixing operations under strictly moisture‑free workshop environment. Incorporate reinforcing silica fillers, silane cross‑linking agent and organotin catalyst according to tooling formula. Adjust filler loading to achieve target hardness and tear strength. Avoid moisture contamination in full production workflow, moisture will cause incomplete curing and surface tacky defects.

Storage & Packing

Packed in sealed 200kg iron drum. Store in cool, dry and ventilated warehouse. Keep drum tightly sealed. Protect from humidity, high temperature and direct sunlight. Reseal drum immediately after partial material discharge. Proper storage preserves polymer reactivity and guarantees valid shelf‑life

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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.