特黄无码在现一区二区,欧美日韩免费专区在线,男女又色又爽又爽视频,女人与公驹交酡全过程

Brief: High styrene rubber is a special variety of styrene-butadiene rubber. It is called High styrene rubber, also known as hard rubber, because of its high styrene conten...

High styrene rubber HS-60 with styrene 60-65% is mainly used for: 1. Light-colored outer tires of high-grade bicycles 2. Electrical insulating materials 3. Various rubber ro...

High styrene rubber HS-68 combined with 66-70% styrene is mainly used for: 1. High-strength imitation leather soles, imitation leather shoes 2. Toughening and modification of ...

High styrene rubber HS-80 combined with 77-82% styrene is mainly used in: car tires Property Index Unit Test standard ...

Compared with traditional sheet-like high styrene rubber, Powdery High styrene rubber has the characteristics of good dispersion, low volatile content and low odor. It is an env...