Vinyl resin microparticles and aqueous emulsion containing the same
申请人:Nippon Paint Co., Ltd.
公开号:EP0231038A1
公开(公告)日:1987-08-05
(A) l to 50% by weight of at least one end carboxyl bearing reactive vinyl monomer of the formula:
in which R₁ is hydrogen or methyl group; R₂ is a substituted or unsubstituted aliphatic hydrocarbon having 2 to l0 carbon atoms, alicyclic hydrocarbon having 6 to 7 carbon atoms or aromatic hycrocarbon having 6 carbon atoms; A is a repeating unit of
R₃ is ethylene or propylene; R₄ is a substituted or unsubstituted alkylene having 2 to 7 carbon atoms; R₅ is a substituted or unsubstituted alkylene having 2 to 5 carbon atoms; m is an integer of l to l0; n is an integer of 2 to 50; X is an inorganic or organic base, and when α,β-ethylenically unsaturated compound(s) (B) hereinunder referred to includes a basic reactive monomer, it may be hydrogen atom, and
(B) 99 to 50% by weight of at least one other α,β-ethylenically unsaturated compounds,
in an aqueous medium through an emulsion polymerization and removing the said medium therefrom.
The invention also concerns an aqueous emulsion containing said microparticles in a considerable quantity, which is specifically useful in an aqueous paint.
Disclosed is a photosensitive composition used for offset printing, which provides an offset printing plate with excellent durability and developability. The photosensitive composition comprising:
(I) a film-forming binder resin,
(II) a photosensitive substance, and
(III) a microgel having a particle size of 0.01 to 2.0 µ prepared by emulsion polymerization using a polymeric emulsifier having Sp value of 9 to 16.