Claims
- 1. A vulcanizable rubber composition comprising a sulfur vulcanizable rubber, a vulcanizing agent and a methylene donor selected from the group consisting of (1) hexmethylene teramine, hexamethoxymethyl melamine, lauryloxymethyl pyridinium chloride, ethyloxymethyl pyridinium chloride, trioxan hexamethylolmelamine and paraformaldehyde (2) from the general formula: ##STR4## where X is an alkyl having from 1 to 8 carbon atoms, R, R.sup.1, R.sup.2, R.sup.3, and R.sup.4 and individually selected from the group consisting of hydrogen, an alkyl having from 1 to 8 carbon atoms, the group --CH.sub.2 OX or their condensation products; and (3) hexakis(methoxymethyl)melamine,N,N',N''-trismethyl/N,N',N''-trimethylolmelamine, hexamethylolmelamine,N,N',N''-dimethylolmelamine, N-methylolmelamine, N,N'-dimethylolmelamine, N,N',N''tris(methoxymethyl)melamine and N,N'N''tributyl-N,N',N''tributyl-N,N',N''-trimethylolmelamine; and (b) from about 0.1 to about 10 phr of a methylene acceptor which is a maleamic acid of the formula: ##STR5## and the weight ratio of methylene donor to the maleamic acid ranges from 1:10 to 10:1.
- 2. The composition of claim 1 wherein the methylene acceptor is: ##STR6##
- 3. The composition of claim 1 wherein the methylene acceptor is: ##STR7##
- 4. The composition of claim 1 wherein the rubber is selected from the group consisting of natural rubber, polychloroprene, polybutadiene, polyisoprene, butyl rubber, EPDM, styrene/butadiene copolymers, terpolymers of acrylonitrile, butadiene and styrene and blends thereof.
- 5. The composition of claim 1 wherein the methylene donor is selected from the group consisting of hexamethylene tetramine, hexamethoxymethyl melamine, lauryloxymethyl pyridinium chloride, ethyloxymethyl pyridinium chloride, trioxan hexamethylolmelamine and paraformaldehyde.
- 6. The composition according to claim 1 wherein the methylene donor is selected from the general formula: ##STR8## wherein X is an alkyl having from 1 to 8 carbon atoms, R, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are individually selected from the group consisting of hydrogen, an alkyl having from 1 to 8 carbon atoms, the group --CH.sub.2 OX or their condensation products.
- 7. The composition of claim 1 wherein the methylene donor is selected from the group consisting of hexakis(methoxymethyl)melamine, N,N',N''-trimethyl/ N,N',N''-trimethylolmelamine, hexamethylolmelamine, N,N',N''-dimethylolmelamine, N-methylolmelamine, N,N'-dimethylolmelamine, N,N',N''tris(methoxymethyl) melamine and N,N',N''tributyl-N,N',N''-trimethylolmelamine.
- 8. The composition of claim 1 wherein the weight ratio of methylene donor to the maleamic acid may range from about 1:3 to about 3:1.
- 9. The composition of claim 1 wherein the sulfur vulcanizing agent is selected from the group consisting of elemental sulfur, an amine disulfide, polymeric polysulfide or sulfur olefin adduct.
- 10. The composition of claim 9 wherein the sulfur vulcanizing agent ranges from about 0.1 to about 5 phr.
- 11. The composition of claim 1 wherein the amount of the maleamic acid may range from about 0.5 to about 5.0 phr.
Parent Case Info
This is a continuation of application Ser. No. 07/573,619 filed Aug. 28, 1990, now abandoned.
US Referenced Citations (4)
Continuations (1)
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Number |
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573619 |
Aug 1990 |
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