首页>
外国专利>
POLYOLS USEFUL FOR PREPARING POLYURETHANE FOAMS HAVING IMPROVED RETENTION OF INSULATIVE PROPERTIES, POLYURETHANE FOAMS PREPARED THEREWITH AND METHODS FOR THE PREPARATION THEREOF
POLYOLS USEFUL FOR PREPARING POLYURETHANE FOAMS HAVING IMPROVED RETENTION OF INSULATIVE PROPERTIES, POLYURETHANE FOAMS PREPARED THEREWITH AND METHODS FOR THE PREPARATION THEREOF
展开▼
机译:用于制备具有改善的绝缘性能的保持性的聚氨酯泡沫的聚烯烃,由此制备的聚氨酯泡沫及其制备方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
Polyurethane foams having improved retention of insulative properties can be prepared using one or more of two novel polyols. One of the polyols is a polyether prepared by reacting a monoepoxide with a compound having the general formula: ##STR1## wherein X is H, Li, Na, K; A is N, S or O; L is a covalent bond or a connecting group having from 1 to 10 carbons; M is any group capable of reacting with an ethylene oxide molecule in the presence of a basic catalyst; and J is an integer from 2 to 8. The other polyol is prepared by (1) admixing ethylene carbonate and one or more hydroxyl functional compounds under reaction conditions sufficient to react the ethylene carbonate and the hydroxyl functional compounds to produce a polyol precursor, and (2) admixing the polyol precursor with diethylene glycol and an anhydride, a dicarboxylic acid, a tricarboxylic acid or mixtures thereof, optionally in the presence of a catalyst.
展开▼