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:
Jul. 24, 2001
Filed:
Mar. 29, 2000
Seiya Koyanagi, Aichi, JP;
Katsumi Yonekura, Aichi, JP;
Shinji Saiki, Aichi, JP;
Kentaro Hayashi, Aichi, JP;
Yoshihito Nakahara, Aichi, JP;
Yuichiro Kishimoto, Aichi, JP;
Mitsubishi Rayon Co., Ltd., Tokyo, JP;
Abstract
An acrylic SMC or BMC, in which when a polymer powder (C) having a bulk density in the range from 0.1 to 0.7 g/ml, an oil absorption of lin-seed oil in the range from 60 to 200 mi/100 g, a degree of swelling by methyl methacrylate is 16-fold or more and a specific surface area in the range from 1 to 100 m,/g is added as a thickening agent, hot water resistance is improved by using a polymer powder (C,) containing no surfactant, a polymer powder (C,) containing as a constituent component a reactive surfactant, or thickening speed is controlled by using a non-cross linked polymer powder (C,) having a Mw from 100,000 to 2,500,000, a non-crosslinked polymer powder (C,) having a Ma from 2,500,000 to 5,000,000, a crosslinked polymer powder (C,) and a polymer powder (D) having a specific surface area from 0.01 m,/g to 1 m,/g; a production method thereof; a method for producing acrylic artificial marble in which components are extruded by a kneading extruder (9) into given shape; and a thickening agent.