The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 10, 1978
Filed:
Feb. 10, 1976
Kiyoshi Matsubara, Yokohama, JP;
Yuichi Nomura, Yokohama, JP;
Tadashi Yatomi, Yokohama, JP;
Tadashi Hamamura, Yokohama, JP;
Isao Noda, Yokohama, JP;
Terumi Watanabe, Yokohama, JP;
Takao Nomura, Nagoya, JP;
Isao Sakata, Toyoda, JP;
Mitsui-Nisso Corporation, Tokyo, JP;
Nippon Unicar Company, Limited, Tokyo, JP;
Toyota Jidosha Kogyo Kabushiki Kaisha, ALL OF, JP;
Abstract
A process for manufacturing high-resilient flexible urethan foams characterized by, reacting and foaming polyalkylene ether polyol and an organic polyisocyanate in the presence of a blowing agent, a surfactant and catalyst, (1) using as said polyalkylene ether polyol one which contains 2 to 10% by weight of a vinyl type polymer and in which its hydroxyl number ranges from 25 to 60 mg KOH/g, of its hydroxyl groups 20 to 70 mol% are primary hydroxyl groups and the remaining hydroxyl groups are secondary hydroxyl groups; (2) using as said organic polyisocyanate a mixture of tolylene diisocyanate with diphenylmethane diisocyanate or a crude diphenylmethane diisocyanate; and (3) using as said surfactant a mixture of a high-molecular-weight siloxane-oxyalkylene copolymer with a low-molecular-weight siloxane-oxyalkylene copolymer.