Coating resin composition
AssigneeDainippon Ink and Chemicals, Inc.
InventorsHidetoshi Konno, Masataka Ooka, Hirofumi Takeda, Hiroshi Sakamoto
Life of this patent
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Abstract
A coating resin composition comprising (I) a vinyl polymer obtained by polymerizing (A) 1 to 100% by weight of a vinyl monomer having at least one unsaturated double bond and at least one siloxy group per molecule and (B) 99 to 0% by weight of a copolymerizable vinyl monomer other than (A) in the presence of a radical generator and (II) a curing agent having reactivity with the hydroxyl groups generated from the polymer (I), and optionally (III) a siloxy group-dissociating catalyst.
Claims26
A one-can paint coating resin composition which is stable for a period of at least one month in the can comprising
- (I) a vinyl polymer obtained by polymerizing (A) 5 to 90% by weight of a vinyl monomer having at least one unsaturated double bond and at least one siloxy group per molecule whereby upon reaction with moisture in the air the siloxy group forms a hydroxyl group and (B) 95 to 10% by weight of a copolymerizable vinyl monomer other than (A) in the presence of a radical generator, and
- (II) a curing agent having reactivity with the hydroxyl groups generated upon reaction of the at least one siloxy group from the polymer (I) with moisture in the air,
- wherein said copolymerizable vinyl monomer is selected from the group consisting of (meth)acrylic acid esters containing no functional groups, aromatic vinyl monomers, hydroxyl group--containing vinyl monomers, (meth)acrylic acid and mixtures thereof.
A coating resin composition comprising:
- (I) a vinyl polymer obtained by polymerizing (A) 5 to 90% by weight of a vinyl monomer having at least on unsaturated double bond and at least one siloxy group per molecule whereby upon reaction with moisture in the air, the siloxy group forms a hydroxyl group and (B) 95 to 10% by weight of a copolymerizable vinyl monomer other than (A) in the presence of a radical generator,
- (II) a curing agent having reactivity with the hydroxyl groups generated upon reaction of the at least one siloxy group from the polymer (I) with moisture in the air, and
- (III) a siloxy group--dissociating catalyst,
- wherein said copolymerizable vinyl monomer is selected from the group consisting of (meth)acrylic acid esters containing no functional groups, aromatic vinyl monomers, hydroxyl group-containing vinyl monomers, (meth)acrylic acid and mixtures thereof.
A coating resin composition which is stable for at least one month and which is useful as a one-can paint comprising:
- (I) a vinyl polymer obtained by polymerizing (A) 5 to 90% by weight of a vinyl monomer having at least one unsaturated double bond and at least one siloxy group per molecule, whereby upon exposure to air the siloxy groups are hydrolyzed by moisture in the air to hydroxyl groups and (B) 95 to 10% by weight of a copolymerizable vinyl monomer selected from the group consisting of (meth)acrylic acid esters containing no functional groups, aromatic vinyl monomers, hydroxyl group-containing vinyl monomers, (meth)acrylic acid and mixtures thereof, in the presence of a radical generator,
- (II) a curing agent having reactivity with the hydroxyl groups generated from hydrolysis of the siloxy groups of the polymer (I) upon exposure of polymer (I) to moisture, and
- (III) 0.1 to 30% by weight based on the weight of the vinyl polymer (I) of a water binding agent having reactivity with moisture,
- whereby the composition will undergo curing by reaction of the curing agent with the hydroxyl groups formed by the hydrolysis of the siloxy groups of the polymer (I) only when the composition is exposed to moisture.
A two-can paint coating resin composition comprising:
- (I) a vinyl polymer obtained by polymerizing (A) 5 to 90% by weight of a vinyl monomer having at least one unsaturated double bond and at least one siloxy group per molecule whereby upon exposure to moisture in the air, the siloxy groups are hydrolyzed to hydroxyl groups, and (B) 95 to 10% by weight of a copolymerizable vinyl monomer selected from the group consisting of (meth)acrylic acid esters containing no functional groups, aromatic vinyl monomers, hydroxyl group-containing vinyl monomers, (meth)acrylic acid and mixtures thereof in the presence of a radical generator, and
- (II) a curing agent having reactivity with the hydroxyl groups generated from the siloxy groups of the polymer (I), which is stored separately form (I) until just prior to use,
- whereby the composition will undergo curing by reaction between the curing agent and hydroxyl groups formed by hydrolysis of the siloxy groups of the polymer (I) only when the composition is exposed to moisture.
Dependencies are inferred from the claim text.