CAS 70131-67-8 Polydimethylsiloxane Hydroxyterminated C8H24N2OSi2

Products Description

The substance corresponding to CAS 70131-67-8 is Polydimethylsiloxane hydroxyterminated, often referred to as Hydroxy-Terminated Polydimethylsiloxane or Hydroxy Terminated Silicone Fluid. It is a linear polymer with a silicon-oxygen bond backbone and is terminated by hydroxyl groups (-OH) at both ends. Its chemical formula can be written as HO[(CH₃)₂SiO]ₙH, where n determines its molecular weight, which typically ranges from 300 to 110,000 g/mol.

Polydimethylsiloxane hydroxyterminated appears as a colorless, transparent slightly yellow liquid with a relatively uniform and clear consistency. It is insoluble in water but miscible with organic solvents such as carbon tetrachloride, benzene, and toluene. The viscosity of this compound varies significantly depending on its molecular weight, ranging from approximately 25 to 30 cSt for low molecular weight variants to as high as 50,000 cSt for high molecular weight ones.

Basic Info

Uses

Silicone Rubber: Polydimethylsiloxane hydroxyterminated functions as a structural control agent, enhancing the processability and transparency of silicone rubber.

Adhesives & Sealants: It improves the flexibility and durability of products such as glass glue and photovoltaic adhesives.

Textile Treatment: When used in textile treatment, it imparts water repellency, smoothness, and elasticity to fabrics.

Safety Information

Risk phrases
36/37/38 - Irritating to eyes, respiratory system and skin.
Safety phrases
S23 - Do not breathe vapours.
S24/25 - Avoid contact with skin and eyes.
S36 - Wear suitable protective clothing.
S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
WGK Germany 1

Company Profile

Gnee Chem is an enterprise specialising in the research, development, production and sales of phytochemicals and fine chemicals.Our factory was established in 2016 and is located in Henan Province, covering an area of 3,600 square metres. We have a professional, well-equipped and high-quality R&D team with more than 10 years of R&D experience. Our products are widely exported to many countries, such as the United States, Russia, Canada, Australia, Europe, etc., and we provide customers with fast shipping services. We hope to establish long-term and mutually beneficial cooperation with more friends in the future, and provide the best products and services for our customers.

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