Title:
【発明の名称】塗膜保護用水性組成物およびその製造方法
Document Type and Number:
Japanese Patent JP2597713
Kind Code:
B2
Abstract:
Disclosed herein are water-based protective composition for coating films. The compositions contain (a) a water-based dispersion of copolymer particles having a number average molecular weight of from 2,000 to 20,000 and a glass transition point of from -10 DEG C to +40 DEG C and obtained by emulsion-polymerizing 100 parts by weight of a monomer mixture consisting substantially of (X) 7-12 parts by weight of an alpha , beta -monoethylenically-unsaturated carboxylic acid and (Y) 88-93 parts by weight of at least one ester selected from the group consisting of C1-4-alkyl acrylates and C1-4-alkyl methacrylates; as well as specific amounts of (b) an ultraviolet absorber, (c) an antioxidant, (d) a thickening agent and (e) a surface active agent. They can form barrier coats having excellent removability, weatherability, waterproofness, heat resistance and coating-film-protecting property. Their preparation processes are also disclosed.
Inventors:
Nobuaki Kawabata
Application Number:
JP14205989A
Publication Date:
April 09, 1997
Filing Date:
June 06, 1989
Export Citation:
Assignee:
Nippon Oil Co., Ltd.
International Classes:
C08J7/04; C08K5/07; C08K5/13; C08K5/34; C08L33/04; C08L33/06; C09D133/04; C08J3/03; C09D133/06; C08L5/00; C08L33/02; C08L93/00; (IPC1-7): C09D133/06; C08J3/03; C08J3/075; C08K5/07; C08K5/13; C08K5/34; C08L33/06
Attorney, Agent or Firm:
Wakabayashi Tadashi