JPH0144244B

PURPOSE:To obtain a foam having improved dimensional stability under wet heat conditions, by reacting a mixture of a polyol with a specific liquid rubber and a blowing agent with a diisocyanate. CONSTITUTION:(A) A mixture of (i) a polyol with (ii) a liquid rubber, e.g. polybutadiene, having hydroxyl...

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Bibliographische Detailangaben
Hauptverfasser:	SATOYOSHI MITSUHIRO, ONO KATSUHIRO, OONAKA KYOSHI, SHIMADA HIDETOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a foam having improved dimensional stability under wet heat conditions, by reacting a mixture of a polyol with a specific liquid rubber and a blowing agent with a diisocyanate. CONSTITUTION:(A) A mixture of (i) a polyol with (ii) a liquid rubber, e.g. polybutadiene, having hydroxyl groups, and (iii) a blowng agent, e.g. trichloromonofluoromethane, is reacted with (B) a diisocyanate, e.g. tolylene diisocyanate, in the presence of a catalyst, e.g. triethylenediamine, at 20-30 deg.C under agitating at a high rotational speed, e.g. 300-6,000rpm. The preferred mixing weight ratios of the components are as follows: component (i)/components (ii) and (iii)=70-95/ 30-5, component (ii)/component (iii)=600-1/1-10, and component (A)/component (B)=100/10-150.