申请人:——
公开号:US20030149123A1
公开(公告)日:2003-08-07
A polyol composition containing a polyester polyol, at least 5 weight % of a compatibilizing agent, based on the weight of the polyol and compatibilizing agent, and a hydrocarbon blowing agent. The compatibilizing agent is one or a combination of a benzoate glycol adduct, a substituted benzoate glycol adduct, a naphthenate glycol adduct, a substituted naphthenate glycol adduct, a toluate glycol adduct, or a substituted toluate glycol adduct. The hydrocarbon blowing agent is selected from cyclopentane, isopentane, n-pentane, 2-chloropropane; 1,1,1,2-tetrafluoroethane (HFC-134a); 1,1,1,3,3-pentafluoropropane (HFC-245fa); and n-propylbromide, or mixtures thereof. The compatibilizing agent improves the miscibility of conventional polyester polyols with hydrocarbon blowing agents. The polyol composition can be reacted with a polyisocyanate to form a foam. Foams prepared from the mixture have superior thermal conductivity, lower flammability, and higher stability of the emulsified liquid reactants prior to polymerization.
一种多元醇组合物,含有一种聚酯多元醇、至少 5 重量%的相容剂(基于多元醇和相容剂的重量)以及一种烃类发泡剂。相容剂是苯甲酸乙二醇加合物、取代苯甲酸乙二醇加合物、环烷酸乙二醇加合物、取代环烷酸乙二醇加合物、甲苯酸乙二醇加合物或取代甲苯酸乙二醇加合物中的一种或其组合。烃类发泡剂选自环戊烷、异戊烷、正戊烷、2-氯丙烷、1,1,1,2-四氟乙烷(HFC-134a)、1,1,1,3,3-五氟丙烷(HFC-245fa)和正丙基溴,或它们的混合物。相容剂可提高传统聚酯多元醇与烃类发泡剂的相溶性。多元醇组合物可与多异氰酸酯反应形成泡沫。由该混合物制备的泡沫具有更高的导热性、更低的易燃性,以及聚合前乳化液体反应物更高的稳定性。