Resin composition for vibration-damping coating material, and production method therefor

Patent metadata

Field	Value
Publication number	US-10865314-B2
Application number	US-201716338251-A
Country	US
Kind code	B2
Filing date	Sep 29, 2017
Priority date	Sep 30, 2016
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

The invention provides a method for providing a coat having excellent appearance and an excellent vibration damping property in a temperature range of a use environment of vibration damping materials. The invention relates to a vibration damping coating resin composition including an emulsion particle having a multilayer structure, the emulsion particle including an outermost layer and an inner layer located inside the outermost layer, the outermost layer being formed from a resin having a glass transition temperature of 60° C. or higher, the outermost layer being present in a proportion of 1% to 30% by mass in 100% by mass of the emulsion particle.

First claim

The invention claimed is:

1. A vibration damping coating comprising:
a vibration damping coating resin composition that contains an emulsion particle having a multilayer structure; and
a pigment,
the emulsion particle including an outermost layer and an inner layer located inside the outermost layer,
the inner layer being formed from a resin,
the outermost layer being formed from a resin having a glass transition temperature of 75° C. or higher,
the outermost layer being present in a proportion of 1% to 17% by mass in 100% by mass of the emulsion particle, and
wherein at least one of the resin forming the outer layer and the resin forming the inner layer comprises a (meth)acrylic polymer.

2. The vibration damping coating according to claim 1 , wherein the glass transition temperature of the resin forming the outermost layer is higher than a glass transition temperature of the resin forming the inner layer by 30° C. or more.

3. The vibration damping coating according to claim 1 , wherein the glass transition temperature of the resin forming the outermost layer is higher than a glass transition temperature of the resin forming the inner layer by 80° C. or more.

4. The vibration damping coating according to claim 1 , wherein a glass transition temperature of the resin forming the inner layer is 30° C. to 40° C.

5. The vibration damping coating according to claim 1 , wherein a glass transition temperature of the resin forming the inner layer is 15° C. or higher.

6. The vibration damping coating according to claim 1 , wherein a glass transition temperature of the resin forming the inner layer is 10° C. or higher.

7. The vibration damping coating according to claim 1 , wherein a glass transition temperature of the resin forming the inner layer is 35° C. or lower.

8. The vibration damping coating according to claim 1 ,
wherein the composition further comprises a component having a sulfosuccinic acid structure or salt thereof and/or a component having a fatty acid structure or salt thereof.

9. The vibration damping coating according to claim 8 ,
wherein the composition comprises a component having a sulfosuccinic acid structure or salt thereof.

10. The vibration damping coating according to claim 8 ,
wherein a total amount of the component having a sulfosuccinic acid structure or salt thereof and the component having a fatty acid structure or salt thereof is 25% by mass or more in 100% by mass of an anionic surfactant in the composition.

11. The vibration damping coating according to claim 8 ,
wherein the total amount of the component having a sulfosuccinic acid structure or salt thereof and the component having a fatty acid structure or salt thereof is 50% by mass or more in 100% by mass of the anionic surfactant in the composition.

12. The vibration damping coating according to claim 8 ,
wherein the total amount of the component having a sulfosuccinic acid structure or salt thereof and the component having a fatty acid structure or salt thereof in the composition is 0.1% to 20% by mass relative to 100% by mass of the entire monomer component used to produce an emulsion.

13. The vibration damping coating according to claim 1 ,
wherein the glass transition temperature of the resin forming the outermost layer is 80° C. or higher.

14. The vibration damping coating according to claim 8 ,
wherein the glass transition temperature of the resin forming the outermost layer is 80° C. or higher.

15. The vibration damping coating according to claim 1 , wherein at least one of the resin forming the outer layer and the resin forming the inner layer has a weight average molecular weight of 30000 to 400000.

16. The vibration damping coating according to claim 8 , wherein at least one of the resin forming the outer layer and the resin forming the inner layer has a weight average molecular weight of 30000 to 400000.

17. A vibration damping coat obtained from the vibration damping coating according to claim 1 .

18. A method for producing a vibration damping coating resin composition containing an emulsion particle having a multilayer structure, the method comprising:
polymerizing a monomer component to form a resin-containing inner layer; and
polymerizing a monomer component to produce the emulsion particle with an outermost layer formed from a resin having a glass transition temperature of 75° C. or higher and the outermost layer is present at a proportion of 1-17% by mass relative to 100% in the mass of the emulsion particle, wherein at least one of the resin forming the outer layer and the resin forming the inner layer comprises a (meth)acrylic polymer.

19. A vibration damping coating comprising:
a vibration damping coating resin composition that contains an emulsion particle having a multilayer structure; and
a pigment,
the emulsion particle including an outermost layer and an inner layer located inside the outermost layer,
the inner layer being formed from a resin,
the outermost layer being formed from a resin having a glass transition temperature of 60° C. or higher,
the outermost layer being present in a proportion of 1% to 17% by mass in 100% by mass of the emulsion particle, wherein a glass transition temperature of the resin forming the outermost layer is higher than a glass transition temperature of the resin forming the inner layer by 10° C. or more, and
wherein at least one of the resin forming the outer layer and the resin forming the inner layer comprises a (meth)acrylic polymer.

20. A method for producing a vibration damping coating resin composition containing an emulsion particle having a multilayer structure, the method comprising:
polymerizing a monomer component to form a resin containing-inner layer; and
polymerizing a monomer component to produce the emulsion particle with an outermost layer formed from a resin having a glass transition temperature of 60° C. or higher, and the outermost layer is present at a proportion of 1% to 17% by mass relative to 100% in the mass of the emulsion particle,
wherein a glass transition temperature of a resin forming the outermost layer is higher than a glass transition temperature of the resin forming the inner layer by 10° C. or more,
and wherein at least one of the resin forming the outer layer and the resin forming the inner layer comprises a (meth)acrylic polymer.

Assignees

• Nippon Catalytic Chem Ind

Inventors

• Namimoto Fuyuko
• Miyawaki Yukihiro

Classifications

• C09D151/003

  grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds (C09D151/04, C09D151/06 take precedence) · CPC title

• C08F2/22

  Emulsion polymerisation · CPC title

• C09D133/06

  of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical · CPC title

• C08F265/06

  Polymerisation of acrylate or methacrylate esters on to polymers thereof · CPC title

• C09D133/064

  containing anhydride, COOH or COOM groups, with M being metal or onium-cation · CPC title