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:
Jun. 23, 2015
Filed:
Oct. 01, 2008
Shigekuni Nakada, Kyoto, JP;
Takayuki Tsuji, Kyoto, JP;
Yukiya Kobayashi, Kyoto, JP;
Sanyo Chemical Industries, Ltd., Kyoto, JP;
Abstract
A method for producing a fine-particle-dispersed polyol (I) is provided, the method including the steps (1) and (n−1): the step (1) of polymerizing an ethylenically unsaturated monomer (b) in a polyol (a), in the presence of fine particles (P1) and a radical polymerization initiator (c), so as to obtain a fine-particle-dispersed polyol intermediate (B2); and the step (n−1) of polymerizing (b) in a fine-particle-dispersed polyol intermediate (B(n−1)), in the presence of (c), so as to obtain a fine-particle-dispersed polyol intermediate (Bn) or the fine-particle-dispersed polyol (I), where n represents an integer of 3 to 7, wherein (P1) have a volume-average particle diameter (R1) of 0.01 μm to 1.0 μm, and a concentration of (b) in the step (1) is 7 wt % to 40 wt %. Thus, a method for producing a fine-particle-dispersed polyol can be provided that contains polymer fine particles dispersed in a polyol having a small particle diameter, and that, when it is used for forming a polyurethane resin, allows the polyurethane resin to exhibit excellent resin properties.