# US 4,391,857 A · Aqueous dispersion type coating compositions with an improved vibration-damping characteristic

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- Number: US 4,391,857 A
- Document ID: US4391857A
- Status: Granted
- Kind: A
- Application number: 06/305,224
- Filed: 1981-09-24
- Granted: 1983-07-05
- Earliest claimed: 1979-08-16
- Assignees: Kuraray Co., Ltd.
- Inventors: Koichi Saito; Osamu Ohara
- Web page: https://patentgrep.com/patent/US4391857A

## CPC

- C09D 123/04: Homopolymers or copolymers of ethene
- C09D 131/04: Homopolymers or copolymers of vinyl acetate
- C08L 23/06: Polyethylene
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## 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

### Claim 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.

### Claim 2 (depends on 1)

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

### Claim 3 (depends on 1)

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

### Claim 4 (depends on 1)

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.

### Claim 5 (depends on 4)

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

### Claim 6 (depends on 4)

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, .alpha.-titanic acid, potassium titanium oxalate, titanium triethanolamine; formaldehyde, glyoxal; methylolmelamine; divinyl sulfone, bis(.beta.-hydroxyethyl)sulfone, disodium tris(.beta.-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.