Hydroxy PDMS 50000 cst is hydroxyl‑terminated polydimethylsiloxane, also known as 107 silicone rubber with CAS 70131‑67‑8. This high‑viscosity base polymer is tailored for neutral sealant production. It shows outstanding compatibility with various fillers and neutral cross‑linkers, providing high elongation and stable curing property, widely used for one‑component neutral alcohol and oxime silicone sealant formulations.

Product Detail

Product Overview

Hydroxy PDMS 50000 cst is hydroxyl‑terminated polydimethylsiloxane (107 silicone base polymer), CAS 70131‑67‑8. Specially optimized for neutral cure sealant systems, the product maintains stable viscosity and precise hydroxyl value. It works well with oxime‑based and alkoxy‑based crosslinkers, contributing to stable curing, low‑corrosion property and superior elastic performance for finished neutral silicone sealants. Batch‑to‑batch consistency is guaranteed under strict quality control.

Key Features

High viscosity 50000 cst, suitable for high elongation neutral sealant
Uniform reactive hydroxyl terminal groups for neutral condensation curing
Excellent compatibility with alkoxy and oxime silane cross‑linkers
Good dispersibility with silica, calcium carbonate and other mineral fillers
Low volatility, less side‑reaction during sealant manufacturing
High elasticity and tensile property after full curing
Stable viscosity performance for large‑batch industrial production

Main Applications

One‑component neutral oxime‑type silicone sealant
Neutral alcohol‑type silicone sealant formulation
Weather‑resistant construction neutral sealing adhesive
Condensation‑cure RTV silicone rubber
High‑elongation silicone compound manufacturing
Industrial potting and sealing silicone products

Processing Suggestions

Carry out feeding, mixing and dispersion under strictly moisture‑free environment. Combine with neutral cross‑linking agent, organometallic catalyst and functional fillers. Adjust filler dosage and additive proportion according to target modulus, elongation and extrusion rate of finished sealant. Avoid any moisture contamination in the whole production process.

Storage & Packing

Keep containers tightly sealed, store in cool, dry and well‑ventilated warehouse. Protect from moisture, high temperature and direct sunlight. Standard iron drum packing. Reseal container promptly after partial material taking to prevent moisture ingress. Proper storage condition ensures valid shelf life.

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Hydroxy PDMS Raw Material 50000 cst CAS 70131-67-8 for Neutral Sealant Formulation

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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.