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US 2014/0179837 A1Published application
Rubber compound and tire with component
AssigneeThe Goodyear Tire & Rubber Company
InventorBruce Raymond Hahn
Life of this patent
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Abstract
The invention relates to a rubber composition with a stiffness property promoted by combination of short fibers and resin product of a methylene donor and a methylene acceptor, where at least a portion of the methylene acceptor is comprised of expoxidized phenol formaldehyde, and to a tire with a component comprised of such rubber composition.
Claims20
A rubber composition comprised of, based upon parts by weight per 100 parts by weight of rubber (phr):
- (A) at least one diene-based elastomer,
- (B) about 30 to about 120 phr of particulate reinforcing filler comprised of:
- (1) rubber reinforcing carbon black,
- (2) precipitated silica, or
- (3) a combination of precipitated silica and rubber reinforcing carbon black;
- (C) about 1 to about 10 phr of short fiber reinforcement comprised of at least one of polyaramid, polyamide, polyester and cellulose filaments, and
- (D) resin product of methylene donor compound and methylene acceptor compound, wherein said resin product is provided as:
- (1) a reaction product of the methylene donor and methylene acceptor in situ within the rubber composition, or
- (2) reaction product of
- (a) a first pre-formed initial resin product of methylene donor and methylene acceptor with a molar deficiency of the methylene donor, prior to addition to said rubber composition, and
- (b) methylene donor in situ within the rubber composition;
- wherein the methylene acceptor for said first pre-formed initial resin is comprised of at least one of epoxidized phenol formaldehyde resin, epoxidized novolac resin, and epoxidized cashew nut shell oil, or
- (3) a second pre-formed initial resin product of a methylene donor and methylene acceptor modified with epichlorohydrin to form an epoxidized initial resin followed by crosslinking said pre-formed initial resin with a methylene donor in situ within the rubber composition,
- wherein the methylene acceptor for said second pre-formed initial resin is comprised of at least one of phenol formaldehyde resin, novolac resin, resorcinol, phenol, alklated phenol, cresol and cashew nut shell oil, particularly phenol formaldehyde resin,
- wherein the methylene acceptor for said in situ formed resin product of methylene acceptor and methylene donor and for reaction with said first and second pre-formed initial resin product in situ within the rubber composition is comprised of an epoxidized phenol formaldehyde polymer;
- wherein said methylene donor is comprised of at least one of hexamethylenetetramine, hexamethoxymethylmelamine, lauryloxymethylpyridinium chloride, ethyloxymethylpyridinium chloride and trioxanhexamethylolmelamine, hexamethylenetetramine and hexamethoxymethylmelamine,
13 more elements
Dependencies are inferred from the claim text.