申请人:Kok Harm-Jan
公开号:US20090234062A1
公开(公告)日:2009-09-17
This invention relates to an aqueous emulsion polymer used as pigment dispersing agent comprising as copolymerized units the following monomers (A) an ethylenically unsaturated monomer containing at least one amino group; (B) an ethylenically unsaturated monomer containing no amino group; (C) optionally a hydroxy- or alkoxyalkyl(meth)acrylate of the formula CH
2
═CH(R
1
)—COO—C
t
H
2t
—OR
2
wherein R
1
is hydrogen or methyl and R
2
is hydrogen or C
1
-C
6
alkyl and t is an integer of 2, 3, 4, 5 or 6; (D) a (poly)alkyleneglycolmono(meth)acrylate of the formula CH
2
═CH(R
1
)—COO—(C
m
H
2m
O)
n
—OR
2
wherein R
1
is hydrogen or methyl and R
2
is hydrogen or C
1
-C
6
alkyl and m is an integer of 2 or 3 and n is an integer of 2 to 20.