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. 26, 2013
Filed:
Mar. 03, 2009
Masanao Kawabe, Kitakyushu, JP;
Hiroko Terao, Kitakyushu, JP;
Natsuko Okazaki, Kitakyushu, JP;
Nippon Steel Chemical Co., Ltd., Tokyo, JP;
Abstract
An end-modified soluble polyfunctional vinyl aromatic copolymer, which is improved in heat resistance, thermal stability, solvent solubility, and compatibility with acrylate compounds, and a curable resin composition using the same are disclosed. The end-modified soluble polyfunctional vinyl aromatic copolymer is obtained by allowing a divinyl aromatic compound (a), a monovinyl aromatic compound (b), and an aromatic ether compound (c) to react with each other, and has, at an end, an end group derived from the aromatic ether compound and having an acrylate bond. The copolymer has a number average molecular weight Mn of 500 to 100,000, an introduction amount (c1) of the end group derived from the aromatic ether compound satisfies (c1)≧1.0 (group/molecule), a molar fraction a' of a structural unit derived from the divinyl aromatic compound and a molar fraction b′ of a structural unit derived from the monovinyl aromatic compound in the copolymer satisfy 0.05≦a′/(a′+b′)≦0.95. Besides, the curable resin composition includes the copolymer and an unsaturated acrylate monomer.