| 摘要 |
A curable composition comprises a polysiloxane additive having at least one unit RaSiO(4-a)/2 and at least one unit RbR1SiO(3-b)/2 wherein R is a C1-12 hydrocarbon, R1 is -(CH2)n(OR2)mX where R2 is C2-3 alkylene, a is 0, 1, 2 or 3 and b is 0, 1 or 2, and X is OH or -OCOCR3=CH2 where R3 is H, methyl or ethyl, n is 2 to 5 and m is 8 to 50, provided where X is OH, n is 3 and m is 18. The compositions are useful with polyacrylates as overprint varnishes with improved stability of friction coefficients. Also disclosed is a method for making the additives.
|
