OH Polymer 107 300000 cst CAS 70131-67-8 for Concrete Stamp Mold Rubber
OH Polymer 107 300000 cst is hydroxyl‑terminated polydimethylsiloxane with CAS 70131‑67‑8. This ultra‑high viscosity base polymer is purpose‑built for condensation‑cure concrete stamp mold rubber. It shows excellent compatibility with reinforcing silica fillers. After reacted with silane cross‑linker and organotin catalyst, finished silicone mold possesses outstanding tear resistance, fine texture reproduction and anti‑abrasion property, widely used for decorative concrete stamping, cement casti
Product Overview
OH Polymer 107 300000 cst is silanol terminated polydimethylsiloxane, also known as 107 silicone rubber base polymer, CAS 70131‑67‑8. This ultra‑high viscosity condensation‑cure PDMS is developed specially for concrete stamp mold manufacturing. Each batch is strictly controlled on viscosity and hydroxyl content. When compounded with reinforcing silica fillers, it forms tough flexible silicone network to bear frequent stamping force. Strict quality control ensures stable performance for mass production of architectural decorative moulds.
Key Features
- 300000 cst ultra‑high viscosity customized for concrete stamp mold rubber
- Stable hydroxyl terminal groups for adjustable condensation curing speed
- Excellent wetting and dispersing performance for high‑loading silica fillers
- Cured silicone has superior tear strength and elastic recovery
- Good wear resistance for long‑time repeated stamping cycles
- High fidelity reproduction of complex stone and brick textures
- Low linear shrinkage to keep dimensional stability of mould patterns
- Good compatibility with conventional silane cross‑linkers and organotin catalysts
- Low volatile content, reliable batch‑to‑batch consistency
Main Applications
- Two‑component condensation cure concrete stamp mold rubber
- Decorative stamped concrete flexible mould for pavement
- Moulds for concrete, cement mortar and plaster casting
- Large‑size landscape and architectural ornament moulds
- Heavy‑duty flexible silicone mould for repeated demoulding
- Custom ultra‑high viscosity mold‑making silicone formulations
Processing Suggestions
Complete feeding, kneading and mixing operations under moisture‑free workshop environment. Mix with reinforcing silica fillers, silane cross‑linking agent and organotin catalyst. Adjust filler loading according to target hardness, tear strength and shrinkage index. Prevent moisture contamination in the whole production process, which will cause incomplete curing and sticky surface defects.
Storage & Packing
Packed in sealed 200kg iron drum. Store in cool, dry and ventilated warehouse. Keep drum tightly sealed. Avoid moisture, high temperature and direct sunlight. Reseal drum immediately after partial material discharge. Follow proper storage conditions to maintain polymer reactivity and guarantee shelf‑life.
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