用于预铺防水卷材的压敏粘合剂组合物及其应用和卷材
By using a combination of butyl rubber, styrene-isobutylene block copolymer, polyisobutylene, tackifying resin and hydrophobic filler in waterproof membranes, the cold flow and roll-up problems of butyl pressure-sensitive adhesives are solved, achieving low water absorption and high peel strength, and meeting the high-temperature durability requirements of waterproof membranes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
- Filing Date
- 2023-07-18
- Publication Date
- 2026-07-17
AI Technical Summary
Existing butyl pressure-sensitive adhesives have a cold flow tendency in waterproof membranes, which causes the surface anti-adhesive particle layer to settle and become embedded in the adhesive layer. Especially in high-temperature environments, the membrane is prone to sticking and sticking to the feet. Existing improvement methods such as vulcanization crosslinking, filler reinforcement and blending hydrogenation have limited effects.
A composition of butyl rubber, styrene-isobutylene block copolymer, polyisobutylene, tackifying resin, calcium carbonate and fumed silica is used. The calcium carbonate content is controlled to be within 25%. The styrene-isobutylene block copolymer is added to provide physical crosslinking points and suppress cold flow. The water absorption rate is controlled by hydrophobic fillers.
It achieves extremely low water absorption (not exceeding 0.5%), high peel strength, and stable cohesive destructive effect, solving the problems of cold flow and roll adhesion, and meeting the high-temperature durability requirements of waterproof membranes.
Smart Images
Figure CN117004345B_ABST