Pigment dispersing resins
AssigneeKansai Paint Co., Ltd.
InventorsYoshio Nakajima, Yoshiyuki Yukawa, Isao Kamimori
Life of this patent
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Abstract
This invention relates to use of a copolymer of a high acid value macromonomer which is obtained through copolymerization of specific monomeric components including methacrylic acid in the presence of a metal complex which is a catalytic chain transfer agent or an addition cleavage-type chain transfer agent, and optionally a radical-polymerization initiator, or this macromonomer into which a polymerizable unsaturated group is further introduced, with an ethylenically unsaturated monomer; and said copolymer into which further a long chain alkyl group is introduced; as pigment-dispersing resins to be used in water-based paint.
Claims62
A pigment dispersing resin, which is obtained by copolymerizing:
- (A) a macromonomer having a resin acid value of 50-450 mg KOH/g, wherein said macromonomer (A) is obtained by copolymerizing methacrylic acid with at least one copolymerizable monomer selected from methacrylic acid esters and styrene, said copolymerizing is performed in the presence of a metal complex and an optional radical polymerization initiator, and said metal complex is a catalytic chain transfer agent or an addition cleavage-type chain transfer agent;
- and
- (B) an ethylenically unsaturated monomer;
- wherein said resin has a weight-average molecular weight within a range of 3,000-100,000 and a resin acid value within a range of 10-200 mg KOH/g.
A pigment dispersing resin having a weight average molecular weight within a range of 5,000-100,000 and a resin acid value within a range of 10-200 mg KOH/g, which is obtained by copolymerizing:
- (A-1) a macromonomer, which is obtained by subjecting (A) a macromonomer having a resin acid value of 50-450 mg KOH/g to an esterification reaction with (C) an epoxy-containing polymerizable unsaturated compound, whereby introducing a polymerizable unsaturated group into (A), wherein said macromonomer (A) is obtained by copolymerizing methacrylic acid with at least one copolymerizable monomer selected from methacrylic acid esters and styrene, said copolymerizing is performed in the presence of a metal complex and an optional radical polymerization initiator, and said metal complex is a catalytic chain transfer agent or an addition cleavage-type chain transfer agent;
- and
- (B) an ethylenically unsaturated monomer.
A pigment dispersing resin having a weight-average molecular weight within a range of 3,000-100,000 and a resin acid value within a range of 10-200 mg KOH/g, which is obtained by copolymerizing:
- (A-2) is a macromonomer, which is obtained by subjecting (A) a macromonomer having a resin acid value of 50-450 mg KOH/g to an esterification reaction with (D) an epoxy-containing long chain alkyl compound, whereby introducing the long chain alkyl group into (A), wherein said macromonomer (A) is obtained by copolymerizing methacrylic acid with at least one copolymerizable monomer selected from methacrylic acid esters and styrene, said copolymerizing is performed in the presence of a metal complex and an optional radical polymerization initiator, and said metal complex is a catalytic chain transfer agent or an addition cleavage-type chain transfer agent;
- and
- (B) an ethylenically unsaturated monomer.
A pigment dispersing resin having a weight-average molecular weight within a range of 3,000-100,000 and a resin acid value within a range of 10-200 mg KOH/g, which is obtained by the steps of:
- 1) copolymerizing:
- (A) a macromonomer having a resin acid value of 50-450 mg KOH/g, wherein said macromonomer (A) is obtained by copolymerizing methacrylic acid with at least one copolymerizable monomer selected from methacrylic acid esters and styrene, said copolymerizing is performed in the presence of a metal complex and an optional radical polymerization initiator, and said metal complex is a catalytic chain transfer agent or an addition cleavage-type chain transfer agent;
- and
- (B) an ethylenically unsaturated monomer,
- to form a copolymer (E);
- and
- 2) subjecting said copolymer (E) to an esterification reaction with (D) an epoxy-containing long chain alkyl compound.
A pigment dispersing resin having a weight-average molecular weight within a range of 3,000-100,000 and a resin acid value within a range of 10-200 mg KOH/g, which is obtained by copolymerizing:
- (A-3) a macromonomer, which is obtained by subjecting (A) a macromonomer having a resin acid value of 50-450 mg KOH/g to an esterification reaction with (C) an epoxy-containing polymerizable unsaturated compound and (D) an epoxy-containing long chain alkyl compound, whereby introducing the polymerizable unsaturated group and long chain alkyl group into (A), wherein said macromonomer (A) is obtained by copolymerizing methacrylic acid with at least one copolymerizable monomer selected from methacrylic acid esters and styrene, said copolymerizing is performed in the presence of a metal complex and an optional radical polymerization initiator, and said metal complex is a catalytic chain transfer agent or an addition cleavage-type chain transfer agent;
- and
- (B) an ethylenically unsaturated monomer.
A pigment dispersing resin having a weight-average molecular weight within a range of 3,000-100,000 and a resin acid value within a range of 10-200 mg KOH/g, which is obtained by the steps of:
- 1) forming (A-1) a macromonomer, which is obtained by subjecting (A) a macromonomer having a resin acid value of 50-450 mg KOH/g to an esterification reaction with (C) an epoxy-containing polymerizable unsaturated compound, whereby introducing a polymerizable unsaturated group into (A), wherein said macromonomer (A) is obtained by copolymerizing methacrylic acid with at least one copolymerizable monomer selected from methacrylic acid esters and styrene, said copolymerizing is performed in the presence of a metal complex and an optional radical polymerization initiator, and said metal complex is a catalytic chain transfer agent or an addition cleavage-type chain transfer agent;
- 2) copolymerizing:
- macromonomer (A-1);
- and
- (B) ethylenically unsaturated monomer to form a copolymer (F);
- 3) subjecting copolymer (F) to an esterification reaction with (D) an epoxy-containing long chain alkyl compound.
Dependencies are inferred from the claim text.