男女叉叉叉_美女被强制侵犯全彩漫画_荀琳大尺度人体写真集_国产欧美性综合视频性刺激

The polyether polyol CHE-3050F is prepared by using a compound containing an active hydrogen group as an initiator and carrying out ring-opening polymerization reaction with propylene oxide under the action of a catalyst. The product is a BHT-free product and has a wide application range which used in block foam, waterproof coatings, mattresses, furniture, packaging materials and other fields, suitable for the production of medium and high density foam.

The polyether polyol CHE-5603 is prepared by the ring-opening polymerization of a compound containing an active hydrogen group as an initiator and propylene oxide in the presence of a catalyst. The product is a general polyether without BHT and has a wide application range which is mainly used in block foam, mattress, furniture, packaging materials, suitable for the production of high, medium and low density foam, especially suitable for flame composite sponge, can increase the tear and tensile strength.

The polyether polyol CHE-5602 is prepared by the ring-opening polymerization of a compound containing an active hydrogen group as an initiator with ethylene oxide and propylene oxide in the presence of a catalyst, and has a molecular weight of about 3000 which is a BHT-free universal polyether and mainly used in block foam, mattress, furniture and packaging materials. In addition, it is suitable for the production of high, medium and low density foam.