Surface irradiation of articles molded from polypropylene compositions

Abstract

Abstract A composition is prepared of, by wt, (I) (A) 100 parts of polypropylene, which may at least in part be grafted with an unsaturated carboxylic acid or anhydride, and (B) an engineering resin selected from a polyamide, polyphenylene ether, polyphenylene ether and styrene mixed of graft copolymerized, and a saturated polyester resin; and (II) to improve compatibility of (A) and (B), up to 30 parts of an unsaturated carboxylic acid or acid anhydride, ester, amide, imide or metal salt thereof, a diamine compound having at least 2 N atoms or a derivative thereof, or a copolymer of an unsaturated epoxy compound and an ethylenically unsaturated compound; and optionally up to 50 parts of an inorganic filler or glass fiber and/or up to 100 parts, each per 100 parts of composition (A), of rubbery copolymer (e.g. an ethylene copolymer rubber) which may be graft copolymerised with an unsaturated carboxylic acid or deriva­tive thereof. The production of these components is described. The components are mixed and molded. The surface of the molded article, e.g. a film, plate or fibers, may be degreased and is irradiated with ultraviolet light of wave­length less than 300 nm, preferably 185 and 254 nm as main wavelengths, for 20 seconds to 10 minutes: The irradiation improves the coatability or printability of the surface, which may then be coated with a polymeric coating, e.g. of a urethane.

Inventors

• 👤 Hiroomi Abe
• 👤 Hideo Shinonaga
• 👤 Kiyoshi Mitsui
• 👤 Satoru Sogabe

Bibliographic Details