Hydroxy Silicone Oil 20000cst CAS 70131-67-8 High Viscosity 107 Rubber for Construction Sealant
Hydroxy Silicone Oil 20000cst CAS 70131-67-8 is high viscosity hydroxyl-terminated polydimethylsiloxane, also known as 107 silicone rubber.
It features reactive terminal hydroxyl groups and can carry out polycondensation crosslinking reaction with silane crosslinkers under catalyst. The cured sealant possesses high elongation, outstanding displacement resistance and long-term weather resistance. It serves as the key base polymer for various construction silicone sealants.
Hydroxy Silicone Oil 20000cst CAS 70131-67-8
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Product Overview
Hydroxy Silicone Oil 20000cst CAS 70131-67-8 is high viscosity hydroxyl-terminated polydimethylsiloxane, commonly referred to as 107 silicone rubber.This product has active terminal hydroxyl groups, capable of polycondensation crosslinking reaction with various silane crosslinkers under catalyst effect. After vulcanization, the silicone material delivers high elongation, excellent deformation adaptability and superior long-term weather resistance. It is developed as core base polymer for all types of construction silicone sealants.
Product Properties
Clear, colorless high-viscosity viscous liquidKinematic viscosity: 20000 mm²/s (25℃)Stable hydroxyl valueNarrow molecular weight distributionExcellent compatibility with inorganic fillers and different silane crosslinkersLow volatile contentGood rheology adjustabilityStable quality under sealed storage
Core Advantages
- High viscosity base polymer, helps finished sealant achieve excellent sag resistance
- Great filler carrying capacity, suitable for high-filler building sealant formulations
- Balanced curing performance, stable surface dry and deep curing speed
- High elongation after curing, satisfies displacement requirements of construction expansion joints
- Outstanding ultraviolet and aging resistance for long-term outdoor building application
- Wide compatibility, applicable for acetic type and neutral ketoxime type construction sealants
Main Applications
20000cst Hydroxy Silicone Oil acts as High Viscosity 107 Rubber for Construction Sealant.Typical applications: base polymer for building weatherproof silicone sealant, curtain wall joint sealant, concrete seam sealing adhesive, window & door construction sealant, exterior facade waterproof silicone sealant.
Usage Guidance
Prevent contact with moisture during production and storage to avoid premature crosslinking.Perform small-batch formulation tests to confirm optimal dosage of crosslinker and catalyst.Keep low humidity environment in production workshop.Avoid mixing with acidic, alkaline and moisture-containing impurities.Tightly seal container immediately after use.
Packing & Storage
Standard package: 200kg iron drum; small test samples are available.Store in cool, dry and ventilated warehouse. Keep container tightly sealed. Keep away from open flame, high temperature, strong acid and strong alkali. Prevent water and impurity contamination during transportation.
Our Service
We supply bulk 20000cst Hydroxy Silicone Oil with stable viscosity and hydroxyl value. Test samples can be provided for formula optimization. Our technical team offers professional support for construction silicone sealant production technology.
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