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:
Mar. 03, 2015
Filed:
Apr. 21, 2009
Kazuki Tokuchi, Kurashiki, JP;
Wataru Tsuji, Kurashiki, JP;
Nobuhiro Moriguchi, Kurashiki, JP;
Noboru Higashida, Kurashiki, JP;
Kazuki Tokuchi, Kurashiki, JP;
Wataru Tsuji, Kurashiki, JP;
Nobuhiro Moriguchi, Kurashiki, JP;
Noboru Higashida, Kurashiki, JP;
Kuraray Co., Ltd., Kurashiki-shi, JP;
Abstract
Provided is a thermoplastic acrylic resin composition comprising a methacrylic resin (A) and a polyvinyl acetal resin (B) obtained by acetalizing a polyvinyl alcohol resin with an aldehyde having 4 or more carbon atoms and an aldehyde having 3 or less carbon atoms in which the total amount of the vinyl alcohol units acetalized with the aldehyde having 4 or more carbon atoms and the aldehyde having 3 or less carbon atoms is 65 to 85 mol % of all repeating units, and the molar ratio of the vinyl alcohol unit acetalized with the aldehyde having 4 or more carbon atoms to the vinyl alcohol unit acetalized with the aldehyde having 3 or less carbon atoms is from 90/10 to 0/100. Furthermore, provided are an article molded from the thermoplastic acrylic resin composition and a method of producing the thermoplastic acrylic resin composition comprising the steps of mixing a methacrylic resin (A) and a polyvinyl acetal resin (B), increasing the resin temperature to 160° C. or more, and then decreasing the resin temperature to 120° C. or less.