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:
Apr. 12, 1994
Filed:
May. 18, 1992
Takeshi Minegishi, Yokohama, JP;
Masayuki Kubo, Yokohama, JP;
Ryosuke Nozaki, Yokohama, JP;
Masahiko Ogawa, Takasaki, JP;
Masaki Tanaka, Annaka, JP;
Yukio Morimoto, Tokyo, JP;
NHK Spring Co., Ltd., Yokohama, JP;
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Abstract
In manufacturing molded product of urethane foam, a releasing agent mainly composed of organopolysiloxane is applied on the inner surface of the mold maintained at 60.degree. C. The agent is prepared by dissolving the base composed of organopolysiloxane composition in an organic solvent. The organopolysiloxane composition comprises (a) a first organopolysiloxane of which 0.1 to 5.0% of all organic groups bonded with Si atoms are vinyl groups and at least 80% of the remaining organic groups are methyl groups, and (b) a second organopolysiloxane containing at least three Si bonded hydrogen atoms in one molecule, wherein the first and second organopolysiloxanes contain Si vinyl groups and SiH groups at a ratio in a range of 1:0.5 to 1:5, and do not substantially contain unreactive siloxane. The agent is cured by irradiation with ultraviolet rays, and a thin and uniform film of releasing agent is formed on the inner surface of the mold. Inside the mold coated with this film of releasing agent is injected a raw liquid of urethane foam of cold cure-type, and after the curing step, a molded product of urethane foam in a desired shape is manufactured.