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US 6,642,335 B2Granted
Flow-and-leveling agents for powder coatings
AssigneeKusumoto Chemicals, Ltd.
InventorsMasafumi Kawase, Yasuhiro Oiwa, Shigehiro Kawahito
Life of this patent
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Abstract
Provided are flow-and-leveling agents for powder coatings which provide the coated surfaces with a flow-and-leveling property by blending into powder coatings taking a serious view of finishing and which improves coating defects such as ruptures and craters to contribute to a rise in the appearance in powder coating. The above flow-and-leveling agents are (meth)acrylic acid ester base copolymers containing a trimethylsilyl group in a proportion of 2 to 65% by weight and having a number average molecular weight of 1000 to 60000.
Claims21
A method for imparting flow-and-leveling properties to a powder coating, comprising the step of:
- adding a trimethylsilyl group-containing polymer obtained by copolymerizing a reactive monomer (A) having a trimethylsilyl group represented by a structural formula:
- —Si(CH3)3
- in a molecular structure and/or a reactive monomer (B) having a trimethylsilyl group in the form of a tris(trimethylsiloxy)silyl group represented by a structural formula:
- —Si(OSi(CH3)3)3
- in a molecular structure with a (meth)acrylic acid ester (C) represented by a formula:
- (wherein R1 represents a hydrogen atom or methyl, and R2 represents an alkyl group or alkenyl group having 1 to 18 carbon atoms) and/or a (meth)acrylic acid ester (D) represented by a formula:
- (wherein R3 represents a hydrogen atom or methyl;
- R4 represents a hydrogen atom or an alkyl group having 1 to 18 carbon atoms;
- n represents an integer of 2, 3 or 4, and m represents an integer of 1 to 50), wherein the above trimethylsilyl group-containing polymer contains a trimethylsilyl group originating in the monomer (A) and/or (B) in a proportion of 2 to 65% by weight and has a number average molecular weight of 1000 to 60000, to the powder coating.
6 more elements
A method for imparting flow-and-leveling properties to a powder coating, comprising the step of:
- adding a trimethylsilyl group-containing copolymer obtained by reacting a copolymer of a multifunctional monomer into which a trimethylsilyl group or a tris(trimethylsiloxy)silyl group can be introduced and a (meth)acrylic acid ester (C) represented by a formula:
- (wherein R1 represents a hydrogen atom or methyl, and R2 represents an alkyl group or alkenyl group having 1 to 18 carbon atoms) and/or a (meth)acrylic acid ester (D) represented by a formula:
- (wherein R3 represents a hydrogen atom or methyl;
- R4 represents a hydrogen atom or an alkyl group having 1 to 18 carbon atoms;
- n represents an integer of 2, 3 or 4, and m represents an integer of 1 to 50) with a trimethylsilyl group-containing compound and/or a tris(trimethylsiloxy)silyl group-containing compound,
- wherein the above trimethylsilyl group-containing polymer contains a trimethylsilyl group in a proportion of 2 to 65% by weight and has a number average molecular weight of 1000 to 60000, to the powder coating.
3 more elements
A flow-and-leveling agent for a powder coating, comprising:
- a trimethylsilyl group-containing polymer obtained by copolymerizing a reactive monomer (A) having a trimethylsilyl group represented by a structural formula:
- —Si(CH3)3
- in a molecular structure and/or a reactive monomer (B) having a trimethylsilyl group in the form of a tris(trimethylsiloxy)silyl group represented by a structural formula:
- —Si(OSi(CH3)3)3
- in a molecular structure with a (meth)acrylic acid ester (C) represented by a formula:
- (wherein R1 represents a hydrogen atom or methyl, and R2 represents an alkyl group or alkenyl group having 1 to 18 carbon atoms) and/or a (meth)acrylic acid ester (D) represented by a formula:
- (wherein R3 represents a hydrogen atom or methyl;
- R4 represents a hydrogen atom or an alkyl group having 1 to 18 carbon atoms;
- n represents an integer of 2, 3 or 4, and m represents an integer of 1 to 50), wherein the above trimethylsilyl group-containing polymer contains a trimethylsilyl group-containing polymer contains a trimethylsilyl group originating in the monomer (A) and/or (B) in a proportion of 2 to 65% by weight and has a number average molecular weight of 1000 to 60000,
- wherein the monomer (A) and/or the monomer (B) are selected from the group consisting of 3-ethacryloxypropyltrimethylsilane, 3-methacryloxypropyltris(trimethylsiloxy)silane, vinyltris(trimethylsiloxy)silane.
7 more elements
A flow-and-leveling agent for a powder coating, comprising:
- a trimethylsilyl group-containing polymer obtained by copolymerizing a reactive monomer (A) having a trimethylsilyl group represented by a structural formula:
- —Si(CH3)3
- in a molecular structure and/or a reactive monomer (B) having a trimethylsilyl group in the form of a tris(trimethylsiloxy)silyl group represented by a structural formula:
- —Si(OSi(CH3)3)3
- in a molecular structure with a (meth)acrylic acid ester (C) represented by a formula:
- (wherein R1 represents a hydrogen atom or methyl, and R2 represents an alkyl group or alkenyl group having 1 to 18 carbon atoms) and/or a (meth)acrylic acid ester (D) represented by a formula:
- (wherein R3 represents a hydrogen atom or methyl;
- R4 represents a hydrogen atom or an alkyl group having 1 to 18 carbon atoms;
- n represents an integer of 2, 3 or 4, and m represents an integer of 1 to 50), wherein the above trimethylsilyl group-containing polymer contains a trimethylsilyl group-containing polymer contains a trimethylsilyl group originating in the monomer (A) and/or (B) in a proportion of 2 to 65% by weight and has a number average molecular weight of 1000 to 60000, wherein the trimethylsilyl group-coating compound and/or the tris(trimethylsiloxy)silyl group-containing compound are selected from the group consisting of trimethylchlorosilane, hexamethyldisilazane, tris(trimethylsiloxy)hydrosilane, 3-aminopropyltris(trimethylsiloxy)silane and 3-mercaptopropyltris(trimethylsiloxy)silane.
6 more elements
A flow-and-leveling agent for a powder coating, comprising:
- a trimethylsilyl group-containing copolymer obtained by reacting a copolymer of a multifunctional monomer into which a trimethylsilyl group or a tris(trimethylsiloxy)silyl group can be introduced and a (meth)acrylic acid ester (C) represented by a formula:
- (wherein R1 represents a hydrogen atom or methyl, and R2 represents an alkyl group or alkenyl group having 1 to 18 carbon atoms) and/or a (meth)acrylic acid ester (D) represented by a formula:
- (wherein R3 represents a hydrogen atom or methyl;
- R4 represents a hydrogen atom or an alkyl group having 1 to 18 carbon atoms;
- n represents an integer of 2, 3 or 4, and m represents an integer of 1 to 50) with a trimethylsilyl group-containing compound and/or a tris(trimethylsiloxy)silyl group-containing compound, wherein the above trimethylsilyl group-containing polymer contains a trimethylsilyl group in a proportion of 2 to 65% by weight and has a number average molecular weight of 1000 to 60000,
- wherein the monomer (A) and/or the monomer (B) are selected from the group consisting of 3-ethacryloxypropyltrimethylsilane, 3-methacryloxypropyltris(trimethylsiloxy)silane, vinyltris(trimethylsiloxy)silane.
3 more elements
A flow-and-leveling agent for a powder coating, comprising:
- a trimethylsilyl group-containing copolymer obtained by reacting a copolymer of a multifunctional monomer into which a trimethylsilyl group or a tris(trimethylsiloxy)silyl group can be introduced and a (meth)acrylic acid ester (C) represented by a formula:
- (wherein R1 represents a hydrogen atom or methyl, and R2 represents an alkyl group or alkenyl group having 1 to 18 carbon atoms) and/or a (meth)acrylic acid ester (D) represented by a formula:
- (wherein R3 represents a hydrogen atom or methyl;
- R4 represents a hydrogen atom or an alkyl group having 1 to 18 carbon atoms;
- n represents an integer of 2, 3 or 4, and m represents an integer of 1 to 50) with a trimethylsilyl group-containing compound and/or a tris(trimethylsiloxy)silyl group-containing compound, wherein the above trimethylsilyl group-containing polymer contains a trimethylsilyl group in a proportion of 2 to 65% by weight and has a number average molecular weight of 1000 to 60000,
- wherein the trimethylsilyl group-coating compound and/or the tris(trimethylsiloxy)silyl group-containing compound are selected from the group consisting of trimethylchlorosilane, hexamethyldisilazane, tris(trimethylsiloxy)hydrosilane, 3-aminopropyltris(trimethylsiloxy)silane and 3-mercaptopropyltris(trimethylsiloxy)silane.
3 more elements
Dependencies are inferred from the claim text.