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. 12, 1985
Filed:
Jul. 28, 1983
Hiroshi Uehara, Nakajo, JP;
Tohru Shimizu, Kokubunji, JP;
Kyowa Gas Chemical Industry Co., Ltd., Tokyo, JP;
Abstract
A neodymium-containing transparent resin comprising (A) a copolymer of (i) at least one monomer selected from the group consisting of alkyl methacrylates having alkyl groups of 1 to 4 carbon atoms and styrene with (ii) at least one copolymerizable unsaturated carboxylic acid or a salt thereof selected from the group consisting of acrylic acid, methacrylic acid and neodymium salts thereof and (B) at least one compound selected from the group consisting of saturated or unsaturated organic carboxylic acids substituted or unsubstituted with a hydroxyl group and having 6 to 21 carbon atoms, and neodymium salts thereof, which transparent resin is characterized by having a neodymium content in the range of 0.3 to 20% by weight, having the number of carboxyl groups possessed by said organic carboxylic acids and salts thereof in a ratio of x to the total number of carboxyl groups possessed by the acrylic acid, methacrylic acid and salt units thereof present in said copolymer and carboxyl groups possessed by said organic carboxylic acids and salts thereof and having the number of carboxyl groups participating in neutralization of neodymium and consequent formation of a salt thereof in a ratio of y to said total number of carboxyl groups, and having the values of x and y satisfy any of the following formulas I, II and III. ##EQU1##