VIBRATION DAMPING COMPOSITION

• US 20090048357A1
• Filed: 09/19/2006
• Published: 02/19/2009
• Est. Priority Date: 09/20/2005
• Status: Active Grant

• Current Assignee: Nihon Tokushu Toryo Co., Ltd., Nippon Shokubai Company Limited
• Original Assignee: Nihon Tokushu Toryo Co., Ltd., Nippon Shokubai Company Limited
• Inventors: Yasui, Yoshihiko, Suzuki, Hiroshi, Nagaishi, Dai
• Granted Patent: US 8,664,286 B2
• Time in Patent Office: Days
• US Class Current: 521/70
• CPC Class Codes: C08F 212/08 Styrene
• CPC Class Codes: C08F 220/06 Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
• CPC Class Codes: C08F 220/14 Methyl esters , e.g. methyl (meth)acrylate
• CPC Class Codes: C08F 220/1804 C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
• CPC Class Codes: C08F 220/1808 C8-(meth)acrylate, e.g. isooctyl (meth)acrylate or 2-ethylhexyl (meth)acrylate
• CPC Class Codes: C08F 265/04 on to polymers of esters
• CPC Class Codes: C08F 265/06 Polymerisation of acrylate or methacrylate esters on to polymers thereof
• CPC Class Codes: C08F 285/00 Macromolecular compounds obtained by polymerising monomers on to preformed graft polymers
• CPC Class Codes: C08K 7/00 Use of ingredients characterised by shape
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/24 Graft or block copolymers according to groups C08L51/00, C08L53/00 or C08L55/02; Derivatives thereof
• CPC Class Codes: C08L 33/08 Homopolymers or copolymers of acrylic acid esters
• CPC Class Codes: C08L 51/003 grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds C08L51/04, C08L51/06 take precedence
• CPC Class Codes: C09D 151/003 grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds C09D151/04, C09D151/06 take precedence

Abstract

To provide a vibration damping composition: excellent in vibration damping property and thermal drying property in a wide temperature range; and sufficiently suppressing sagging of a vibration damping coating film on the vertical surface; and therefore useful for vibration damping materials of various structures.

A vibration damping composition comprising an emulsion for vibration damping materials, a foaming agent, and an inorganic pigment, wherein the emulsion for vibration damping materials comprises a particle having a core part formed from an acrylic copolymer (A) and a shell part formed from an acrylic copolymer (B), and at least one of the acrylic copolymers (A) and (B) is prepared by copolymerizing a monomer component comprising methacrylic acid.

Claims

1. A vibration damping composition comprising an emulsion for vibration damping materials, a foaming agent, and an inorganic pigment,

wherein the emulsion for vibration damping materials comprises a particle having a core part formed from an acrylic copolymer (A) and a shell part formed from an acrylic copolymer (B), and

at least one of the acrylic copolymers (A) and (B) is prepared by copolymerizing a monomer component comprising methacrylic acid.

2. The vibration damping composition according to claim 1,

wherein the emulsion for vibration damping materials is produced by performing an emulsion polymerization step using monomer components having different glass transition temperatures in multiple stages.

3. The vibration damping composition according to claim 1,

wherein the emulsion for vibration damping materials is produced by performing an emulsion polymerization step using a monomer component constituting the core part formed from the acrylic copolymer (A) prior to an emulsion polymerization step using a monomer component constituting the shell part formed from the acrylic copolymer (B).

4. The vibration damping composition according to claim 1,

wherein the vibration damping composition comprising a foaming agent foaming during drying by heating.

5. The vibration damping composition according to claim 1,

wherein the vibration damping composition comprises 50 to 700 parts by weight of inorganic pigment relative to 100 parts by weight of the emulsion for vibration damping materials.

6. The vibration damping composition according to claim 1,

wherein the inorganic pigment comprises a flaky inorganic pigment.

7. A use method of the vibration damping composition of claim 1,

wherein the vibration damping composition is used as an aqueous vibration damping material.

8. A coating method of the vibration damping composition of claim 1,

wherein the vibration damping composition is coated so as to have a face weight of 1.0 to 7.0 kg/m² after drying, and dried.

9. A vibration damping material obtainable by the coating method of the vibration damping composition of claim 8.

10. The vibration damping composition according to claim 2,

wherein the emulsion for vibration damping materials is produced by performing an emulsion polymerization step using a monomer component constituting the core part formed from the acrylic copolymer (A) prior to an emulsion polymerization step using a monomer component constituting the shell part formed from the acrylic copolymer (B).

11. The vibration damping composition according to claim 2,

wherein the vibration damping composition comprising a foaming agent foaming during drying by heating.

12. The vibration damping composition according to claim 3,

wherein the vibration damping composition comprising a foaming agent foaming during drying by heating.

13. The vibration damping composition according to claim 2,

wherein the vibration damping composition comprises 50 to 700 parts by weight of inorganic pigment relative to 100 parts by weight of the emulsion for vibration damping materials.

14. The vibration damping composition according to claim 3,

wherein the vibration damping composition comprises 50 to 700 parts by weight of inorganic pigment relative to 100 parts by weight of the emulsion for vibration damping materials.

15. The vibration damping composition according to claim 4,

wherein the vibration damping composition comprises 50 to 700 parts by weight of inorganic pigment relative to 100 parts by weight of the emulsion for vibration damping materials.

16. The vibration damping composition according to claim 2,

wherein the inorganic pigment comprises a flaky inorganic pigment.

17. The vibration damping composition according to claim 3,

wherein the inorganic pigment comprises a flaky inorganic pigment.

18. The vibration damping composition according to claim 4,

wherein the inorganic pigment comprises a flaky inorganic pigment.

19. The vibration damping composition according to claim 5,

wherein the inorganic pigment comprises a flaky inorganic pigment.

20. A coating method of the vibration damping composition of claim 2,

wherein the vibration damping composition is coated so as to have a face weight of 1.0 to 7.0 kg/m² after drying, and dried.