Polyorganosiloxane having poly(meth)acrylate groups and methods for the preparation and use thereof

A polyorganosiloxane having both aliphatically unsaturated groups and poly(meth)acrylate groups, wherein the polyorganosiloxane comprises unit formula:

• [R3w(R5—S—R″)(OR4)(2-w)Si—O1/2]p[R3v(R5—S—R″)(OR4)(1-v)Si—O2/2]q[(R5—S—R″)Si—O3/2]k(R6R72SiO1/2)r(R72SiO2/2)s(R6R7SiO2/2)t(R73SiO1/2)u, where each subscript w is independently 0, 1, or 2, each subscript v is independently 0 or 1, each R3 is an independently selected monovalent hydrocarbon group;
• each R4 is an independently selected alkyl group;
• each R5 is an independently selected divalent hydrocarbon group, each R″ is independently a (meth)acrylate polymer or copolymer, each R6 is an independently selected aliphatically unsaturated monovalent hydrocarbon group, each R7 is an independently selected monovalent hydrocarbon group free of aliphatic unsaturation, subscript p≥0, subscript q≥0, subscript k≥0, a quantity (p+q+k) 1, subscript r≥0, subscript s≥0, subscript t≥0, subscript u≥0, a quantity (r+t) 1, and a quantity (p+q+k+r+s+t+u) is sufficient to provide a molecular weight of at least 50 kDa to the polyorganosiloxane.