Water-based adhesives
AssigneeBridgestone Corporation
InventorsAmy M. Randall, William L. Hergenrother, Sheel Agarwal, Ashley S. Hilton
Life of this patent
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Abstract
An adhesive includes a polymeric latex, a penetrant selected from the group consisting of: terpenes, polylimonene, limonene, carvone, a-pinene, citral, dipentene, 1,8-cineole, eucalyptol, citronellol, geraniol, citronellene, terpinen-4-ol, borneol, camphor, guayule resin, and combinations thereof; and a reinforcing filler. The adhesive has a solids content of 35-65% and a pH of 9 to 12. Articles of manufacture, such as tires and air springs incorporate the adhesive to join rubber interfaces. A method of making the adhesive is also is provided.
Claims19
An article of manufacture comprising:
- an elastomeric rubber component comprising an elastomer selected from the group consisting of:
- polychloroprene, butyl rubber, natural rubber, guayule rubber, polyisoprene, polybutadiene, nitrile rubber, poly(styrene-butadiene), and combinations thereof;
- the elastomeric rubber component being joined at an interface with a second rubber component or another portion of the elastomeric rubber component;
- wherein the interface includes a layer of a water-based adhesive, the water-based adhesive comprising:
- a polymeric latex;
- a penetrant selected from the group consisting of:
- terpenes, polylimonene, limonene, carvone, α-pinene, citral, dipentene, 1,8-cineole, eucalyptol, citronellol, geraniol, citronellene, terpinen-4-ol, borneol, camphor, guayule resin, and combinations thereof;
- and
- a reinforcing filler in an amount of 10 to about 80 phr;
- wherein the adhesive has a solids content of 35-65% and a pH of about 9 to about 12;
- wherein the article of manufacture is a rubber air spring or a tire component.
The article of manufacture of claim 7, wherein the adhesive further comprises:
- a non-ionic surfactant stabilizer;
- and
- an aliphatic hydrocarbon resin tackifier, wherein the aliphatic hydrocarbon resin tackifier, has a softening point of 26° C. to 130° C. and a solids content of 45% to 63%;
- wherein the reinforcing filler is a carbon black aqueous dispersion, wherein the carbon black is in an amount of about 15 to about 80 phr and is selected from the group consisting of the following series:
- N100, N200, N300, N400, N500, N600, N700, N800, and N900;
- wherein the adhesive is substantially or completely free of VOC-containing or eluting solvent;
- wherein the adhesive is substantially or completely free of cure agents;
- wherein the polymer of the polymeric latex is hevea natural rubber, non-hevea natural rubber, or polychloroprene, and has a number average molecular weight of about 100,000 to about 5,000,000 g/mol;
- and a Tg of about −110° C. to about −25° C.
A method comprising the steps of:
- mixing together an adhesive composition comprising:
- a polymeric latex;
- a penetrant, wherein the penetrant is limonene;
- and
- a reinforcing filler in an amount of 10 to 80 phr;
- wherein the reinforcing filler is added as an aqueous dispersion, while maintaining a solids content of 35-65%;
- wherein the adhesive has a pH of 9 to 12.
Dependencies are inferred from the claim text.