Title:
REACTION INJECTION MOLDING
Document Type and Number:
Japanese Patent JPH02296816
Kind Code:
A
Abstract:
PURPOSE:To improve the heat resistance of a polyurethane elastomer without detriment to its elongation properties by using a high-MW polyoxyalkylene polyol having a low degree of unsaturation and a specified hydroxyl value and a chain extender which comprises a polyamine whose amino groups are directly bonded to an aromatic ring. CONSTITUTION:A polyurethane elastomer molding is obtained by the reaction injection molding of a starting component essentially consisting of a polyoxyalkylenediol of a degree of unsaturation <=0.05meq/g, most desirably >=0.025meq/g, a hydroxyl value of 5-60, most desirably <10 (MW/OH >=2900), the number of hydroxyls per molecule of 2-8, desirably 2-6 and a chain extender comprising a polyamine whose primary and/or secondary aminos are directly bonded to an aromatic ring (e.g. diethyltoluenediamine) with a starting component essentially consisting of a polyisocyanate compound.
Inventors:
WADA HIROSHI
SHIMADA TADASHI
SAITO JOICHI
TANABE KIYOSHI
SHIMADA TADASHI
SAITO JOICHI
TANABE KIYOSHI
Application Number:
JP11751489A
Publication Date:
December 07, 1990
Filing Date:
May 12, 1989
Export Citation:
Assignee:
ASAHI GLASS CO LTD
International Classes:
C08G18/48; C08G18/65; C08G18/66; (IPC1-7): C08G18/48; C08G18/66
Attorney, Agent or Firm:
Akira Uchida (2 outside)
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