|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||C08L-075/04 C08K-005/01 C08J-009/00|
|미국특허분류(USC)||521/132 ; 521/155 ; 521/161 ; 521/137|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 13 인용 특허 : 0|
A method is described for the preparation of rigid foams, having urethane and/or isocyanurate groups and being extensively open celled, by reacting polyisocyanates with compounds having at least two groups capable of reacting with isocyanates and the equivalent weight per reactive group of which is about 9 to 800, in the presence of catalysts, surface active substances, as well as, optionally, physical blowing agents, flame retardants and other known auxiliary materials and finishing agents, wherein the reaction is carried out in the presence of liquid, ...
A method for the preparation of extensively open celled rigid foams comprising: reacting a polyisocyanate with compounds having on average three hydroxyl groups per molecule and further having an OH-number between about 100 to 800 in presence of a catalyst, surface active substance, as well as, optionally, one or more members of a group consisting of a physical blowing agent, flame retardant, other auxiliary materials and finishing agents; and carrying the reaction in the presence of polybutadiene or polyoctenylene or both as an unsaturated hydrocarbon h...