Aqueous dispersion type coating compositions with an improved vibration-damping characteristic

• US 4,391,857 A
• Filed: 09/24/1981
• Issued: 07/05/1983
• Est. Priority Date: 08/16/1979
• Status: Expired due to Fees

• Current Assignee: Kuraray Company Limited
• Original Assignee: Kuraray Company Limited
• Inventors: Saito, Koichi, Ohara, Osamu
• Primary Examiner(s): Schofer, Joseph L.
• Assistant Examiner(s): SAROFIM, NABIL F
• Application Number:
  US06/305,224
• Time in Patent Office: 649 Days
• Field of Search: 524/446, 525/370, 427/385.5
• US Class Current: 427/385.5
• CPC Class Codes: C08L 23/06 Polyethene
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 2666/54 Inorganic substances
• CPC Class Codes: C09D 123/04 Homopolymers or copolymers of ethene
• CPC Class Codes: C09D 131/04 Homopolymers or copolymers of vinyl acetate

Abstract

There is provided an aqueous dispersion type vibration-damping coating composition containing, as essential components thereof, (a) a polyvinyl acetate emulsion, (b) a polyethylene in finely divided particulate or emulsion state and (c) a flaky inorganic powder. When this composition is applied to the surface of a structural member which could be source of noise or vibrations, the coating composition displays a high vibration-damping effect over a broad temperature range from low to high temperatures and is excellent in resistance to water, heat and weathering.

Claims

1. A method of damping the vibration of a structural member comprising (1) coating a surface of said structural member with a layer of an aqueous dispersion comprising, as essential components thereof, (a) a polyvinyl acetate emulsion, (b) an ethylene polymer in finely divided particulate or emulsion state, and (c) a flaky inorganic filler, and (2) then drying the coated layer.

2. The method of damping the vibration of a structural member as claimed in claim 1, wherein said ethylene polymer is polyethylene.

3. The method of damping the vibration of a structural member as claimed in claim 1, wherein said flaky inorganic powder is mica powder.

4. The method of damping the vibration of a structural member as claimed in claim 1, wherein said aqueous dispersion further comprises (d) a cross-linking agent.

5. The method of damping the vibration of a structural member as claimed in claim 4, wherein said cross-linking agent is a zirconium compound.

6. The method of damping the vibration of a structural member as claimed in claim 4, wherein said cross-linking agent is selected from the group consisting of ammonium zirconylcarbonate, zirconium chloride, zirconium nitrate, zirconium lactate, sodium zirconium oxalate;

boric acid, borax, titanyl sulfate, α

-titanic acid, potassium titanium oxalate, titanium triethanolamine;

formaldehyde, glyoxal;

methylolmelamine;

divinyl sulfone, bis(β

-hydroxyethyl)sulfone, disodium tris(β

-sulfoethyl)sulfonium;

epichlorohydrin, polyamide-polyamine-epichlorohydrin resins, glycidyl compounds of water-soluble polyhydric alcohols, dicarboxylic acid chlorides, acid anhydrides;

disulfite compounds; and

di- and tri-isocyanates.