| 摘要 |
<p>A silicone-modified acrylic copolymer having a weight average molecular weight of 5,000 to 1,000,000, comprising: I. a structural unit of formula <CHEM> wherein R<1> is a hydrogen atom, a methyl group or an ethyl group, and R<3> is an alkyl group having up to 13 carbon atoms or an aryl group having 6 to 14 carbon atoms; II. a structural unit of formula <CHEM> or of formula <CHEM> wherein R<2> is a hydrogen atom, a methyl group or an ethyl group, each R<4>, which may be identical or different, is an alkyl group having up to 6 carbon atoms or an aryl group having 6 to 14 carbon atoms, each R<5>, which may be the same or different, is a hydrogen atom, an alkyl group having up to 6 carbon atoms or an aryl group having 6 to 14 carbon atoms, A is a divalent organic group having 2 to 20 carbon atoms which may optionally comprise an ether bond or an ester bond in the main chain, and c and d are average recurring unit numbers, c being from 1 to 100 and d being from 0 to 100; and, optionally, III. a structural unit of formula <CHEM> wherein R<6> is a hydrogen atom, a methyl group or an ethyl group, and R<7> is an ethylenically unsaturated hydrocarbon group having 2 to 20 carbon atoms which may optionally comprise an ether bond or an ester bond in the main chain, wherein units (I), (II) and (III) are contained in mole percentages of (I) = 10 to 99.9%, (II) = 90 to 0.1% and (III) = 0 to 89.9% relative to the total number of units (I), (II) and (III). <IMAGE></p> |
