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. 18, 1995
Filed:
Apr. 30, 1993
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
A styrene resin composition comprising a crosslinked styrene resin and uniformly dispersed therein an uncrosslinked resin capable of being extracted with an organic solvent, the amount of the uncrosslinked resin being from 3 to 50% by weight based on the total amount of the composition; and a method of producing a molding of a styrene resin composition, which method comprises the step of subjecting to cast polymerization a liquid mixture comprising: (a) a styrene monomer in an amount of 30% by weight or more based on the total amount of the ingredients (a), (b), and (c); (b) a monofunctional monomer having one radical-polymerizable double bond in the molecule, in an amount less than 70% by weight based on the total amount of the ingredients (a), (b), and (c); (c) a polyfunctional monomer having at least two radical-polymerizable double bonds in the molecule, in an amount of from 0.01 to 40% by weight based on the total amount of the ingredients (a), (b), and (c); (d) a resin component soluble in a mixture of the ingredients (a), (b), and (c), in an amount of from 3 to 100 parts by weight per 100 parts by weight of the total amount of the ingredients (a), (b), and (c); and (e) a free-radical polymerization initiator in an amount of from 0.001 to 5 parts by weight per 100 parts by weight of the total amount of the ingredients (a), (b), (c), and (d).