Mono-End Dihydroxy Polydimethylsiloxane

Mono-End Dihydroxy Polydimethylsiloxane

Mono-end dihydroxy polydimethylsiloxane can be introduced into a polyurethane backbone in block form while the other silicone chain end remains free, allowing rapid migration to the coating surface for hydrophobic/oleophobic, abrasion-resistant, anti-blocking and slip performance.

Product Features

Can react chemically with -NCO, -NH2, -COOH and other groups.

Mainly used in silicone-modified PU, PUD, TPU and modified polyester or acrylic resin systems.

Improves lubricity and abrasion resistance while providing water repellency, anti-blocking, anti-staining and anti-graffiti functions.

Good compatibility with metal, plastic, rubber and other substrates.

Improves scratch resistance, UV stability and heat resistance.

Low surface energy helps create anti-blocking and stain-resistant surfaces and improves fabric hand feel.

Can be used as an alternative to Shin-Etsu X-22-176DX and similar grades.

Typical Properties

Indicator	Result
MW 2000 Grade	Average molecular weight: 2000; appearance: colorless transparent liquid; viscosity at 25°C: 80 mPa·s; hydroxyl equivalent weight: 1000 g/mol; hydroxyl value: 56
MW 3000 Grade	Average molecular weight: 3000; appearance: colorless transparent liquid; viscosity at 25°C: 60 mPa·s; hydroxyl equivalent weight: 1500 g/mol; hydroxyl value: 37
MW 4000 Grade	Average molecular weight: 4000; appearance: colorless transparent liquid; viscosity at 25°C: 135 mPa·s; hydroxyl equivalent weight: 2000 g/mol; hydroxyl value: 28
MW 5000 Grade	Average molecular weight: 5000; appearance: colorless transparent liquid; viscosity at 25°C: 165 mPa·s; hydroxyl equivalent weight: 2500 g/mol; hydroxyl value: 22

Note: The above information is for reference only and does not constitute technical specifications.

How to Use

Use as a reactive modifier for silicone-modified polyurethane, PUD, TPU, polyester resin and acrylic resin systems. Molecular weight from 1000 to 100000 and other end-capped structures can be customized; optimum dosage should be determined by formulation testing.

Typical Applications

Heat-resistant coatings, architectural coatings, anticorrosive coatings and protective varnishes

Clear abrasion-resistant automotive coatings

Marine antifouling coating modification

Finishing agents for sportswear, home textiles and apparel fabrics

Protective coatings for electronic housings and precision parts

Tackifiers, silicone stone adhesives and structure-control agents for high-temperature adhesives

Base silicone oil for thermal grease

Packaging & Storage

Packaging Specifications

25kg, 50kg, 200kg, 1000kg plastic drums

Storage Conditions

Non-dangerous goods. Recommended storage temperature: 5-35°C. Keep sealed.

Shelf Life

6 months unopened

Mono-End Dihydroxy Polydimethylsiloxane