| abstract |
(57) Abstract: [configuration] and polymethylene polyphenylene polyisocyanate, -CO-CH (CH 3) in the molecule and a polyol having an -O- group, biodegradability polyurethane buffer obtained by reacting a foaming agent It is a material. During this manufacturing, If necessary, a catalyst and a foam stabilizer are used together. [Effect] This polyurethane cushioning material has not only excellent cushioning and compression characteristics, but also extremely high biodegradability. Therefore, it can be used in a wide field as a buffer material that does not impair the natural environment. |