摘要:
폴리알킬렌글리콜 또는 그 알킬에테르에 일반식 C n F 2n +1 (CH 2 CF 2 ) a (CF 2 CF 2 ) b CH=CH 2 (여기에서, n은 1?6의 정수이며, a는 1?4의 정수, b는 1?3의 정수임)으로 표시되는 폴리플루오로-1-알켄을 그라프트 공중합 시킨 그라프트 공중합체. 이 그라프트 공중합체는 생체 축적성이 낮다고 알려진 탄소수 6 이하의 퍼플루오로알킬기를 갖는 올리고머 화합물이며, 이형제의 유효성분으로서 사용했을 때, 탄소수 8 이상의 퍼플루오로알킬기를 갖는 화합물을 사용한 경우와 동등한 이형 성능을 발휘한다.
摘要:
Disclosed is a method for producing a flexible polyurethane foam which has a higher biomass content compared to a conventional flexible polyurethane foam and also has good foam properties and appearance. The method is characterized by using a polymer-dispersed polyol produced by the polymerization of a vinyl monomer in the presence of a polyol (a1) derived from a natural oil-and-fat and/or a polyoxyalkylene polyol (a2): the polyol (a1) derived from a natural oil-and-fat: a polyol (a1) derived from a natural oil-and-fat, which is produced by attaching a hydroxy group to a natural oil-and-fat through a chemical reaction and has a hydroxy value of 20 to 250 mgKOH/g and a molecular weight distribution of 1.2 or more; and the polyoxyalkylene polyol (a2): a polyoxyalkylene polyol produced by the ring-opening polymerization of the polyol (a1) and an alkylene oxide (c) in the presence of at least one polymerization catalyst (b) selected from the group consisting of a coordinate anionic polymerization catalyst and a cationic polymerization catalyst.
摘要:
The invention relates to a process for the batch or semi-batch preparation of a polymer polyol, which process comprises mixing a base polyol, one or more ethylenically unsaturated monomers, a polymerization initiator, optionally a macromer, and optionally a chain transfer agent, and polymerizing the mixture thus obtained at a temperature of 50 to 200°C, wherein one or more of the compounds to be mixed are fed while having a temperature which is higher than ambient temperature.