A plasticizer with a crosslinking/chain extending agent is incorporated into a water-blown flexible polyurethane foam formulation to provide acceptable softness, openness, and tensile strength characteristics. The class of plastisizers is selected from the group consisting of alkyl benzyl phthalates, phosphate esters and benzoates. The aromatic polyhydroxy compounds are a preferred class of crosslinking/chain extending agents, particularly dihydroxyaromatic compounds, more particularly resorcinol. Other classes of preferred crosslinking/extending agents are saccharides, alkyl glycosides, and alkylene oxide adducts of aliphatic triols. Other preferred crosslinker/extenders include epoxidized soybean oil, polymeric 1,3,5-trimethyl, 2-hydroxy-benzene, selected phenolic resins, selected low molecular weight adducts of a polyfunctional aliphatic amines, and polyoxyalkylene polyols wherein the hydroxyl number is less than about 200 and the average number of hydroxyl groups range from about 3 to about 8.
在
水发泡软质聚
氨酯泡沫配方中加入一种带有
交联剂/链延伸剂的
增塑剂,以提供可接受的柔软度、开放性和拉伸强度特性。该类
增塑剂选自
邻苯二甲酸烷基苄酯、
磷酸酯和
苯甲酸酯组成的组。芳香族多羟基化合物是首选的一类
交联剂/链延伸剂,特别是二羟芳香族化合物,尤其是
间苯二酚。其他优选的
交联剂/延链剂有
糖类、烷基糖苷和脂肪族三醇的环氧亚烷基加合物。其他优选的
交联剂/扩展剂包括环氧化大豆油、聚合 1,3,5-三甲基 2-羟基苯、精选的
酚醛
树脂、精选的多官能团脂肪胺低分子量加合物,以及羟基数小于约 200、羟基平均数在约 3 至约 8 之间的聚氧亚烷基多元醇。