# US 5,708,042 A · Method of manufacturing adhesive foamed product

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,708,042 A
- Document ID: US5708042A
- Status: Granted
- Kind: A
- Application number: 08/548,612
- Filed: 1995-10-26
- Granted: 1998-01-13
- Earliest claimed: 1994-10-27
- Inventors: Itsuro Hasegawa
- Web page: https://patentgrep.com/patent/US5708042A

## CPC

- C08J 9/10: developing nitrogen {, the blowing agent being a compound containing a nitrogen-to-nitrogen bond}
- B29C 44/18: Filling preformed cavities {(B29C44/1204 takes precedence)}
- B60R 13/08: Insulating elements, e.g. for sound insulation {(sound insulating linings for trains B61D17/185; drivers' cabs for load-carrying vehicles insulated against vibrations or noise B62D33/0604; thermal or acoustic insulation of engines F02B77/11; damping of sounds using compensation by electro-acoustic methods G10K11/178)}
- C08J 9/0014: {Use of organic additives}
- C08J 2323/08: Copolymers of ethene (C08J2323/16 takes precedence)
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR

## Abstract

A method of manufacturing an adhesive foamed product for use in a hollow component of a motorcar, includes the steps of mixing an adhesive resin, a foaming agent, a crosslinking agent, a foaming accelerator and a polymerizable monomer to thereby formulate a highly foamable composition, arranging the foamable composition thus formulated in the interior of a hollow component of a motorcar, and heating the foamable composition until it is foamed to have a shape corresponding substantially to the shape of the hollow component.

## Claims

### Claim 1

A method of manufacturing a motorcar component having a foam-filled interior comprising the steps of:
mixing together:
an adhesive resin selected from the group consisting of ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-butyl acrylate copolymer and a polymer blend of ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer or ethylene-butyl acrylate copolymer with low density polyethylene;
a foaming agent;
a crosslinking agent;
a foaming accelerator; and
a polymerizable monomer selected from the group consisting of triallyl cyanurate, triallyl isocyanurate, trimethylolpropane trimethacrylate and mixtures thereof;
to thereby formulate a highly foamable composition;
arranging the foamable composition thus formulated in the interior of a hollow motorcar component; and
heating the foamable composition arranged in the interior of the hollow component until it is foamed to have a shape corresponding substantially to the shape of the interior of the hollow component.

### Claim 2 (depends on 1)

The method as defined in claim 1, wherein the foamable composition is formed to have a volume in a range of 1/10 to 1/30 of the volume of the interior of the hollow component to be filled.

### Claim 3 (depends on 1)

The method as defined in claim 1, wherein the adhesive resin is selected from the group consisting of ethylene-butyl acrylate copolymer and a polymer of ethylene-butyl copolymer and low-density polyethylene.

### Claim 4 (depends on 1)

The method as defined in claim 1, wherein the polymerizable monomer is present in a total amount of 0.2 to 5.0 parts by weight with respect to 100 parts by weight of the adhesive resin.