US6441070B1 — Rubber compositions containing a trivalent phosph…

Claim 1

Independent Claim 121 words

A method of processing a rubber composition which comprises mixing (i) 100 parts by weight of at least one elastomer; with (ii) 1 to 150 phr of a trivalert phosphorous compound-silica complex; wherein said trivalent phosphorous compound is a compound of the formula (I) or (II): wherein each R 1 is independently selected from the group consisting of hydrogen, alkls, having from 1 to 18 carbon atoms, and aryls and arylalkyls having 6 to 15 carbon atoms; and wherein each R 2 is independently selected from the group consisting of halogens, alkys having from 1 to 18 carbon atoms, aryls and arylalkyls having form 6 to 10 carbon atom; amino alkylamino having from 1 to 10 carbon atoms, sulfur and alkylmercaptans.

Claim 2

Independent Claim 121 words

A method of processing a rubber composition which comprises mixing (i) 100 parts by weight of at least one elastomer; with (ii) 1 to 150 phr of a trivalert phosphorous compound-silica complex; wherein said trivalent phosphorous compound is a compound of the formula (I) or (II): wherein each R 1 is independently selected from the group consisting of hydrogen, alkls, having from 1 to 18 carbon atoms, and aryls and arylalkyls having 6 to 15 carbon atoms; and wherein each R 2 is independently selected from the group consisting of halogens, alkys having from 1 to 18 carbon atoms, aryls and arylalkyls having form 6 to 10 carbon atom; amino alkylamino having from 1 to 10 carbon atoms, sulfur and alkylmercaptans.

Claim 3

Dependent Claim 26 words

The method of claim 1 wherein from 0.5 to 25 percent by weight of said trivalent phosphorous compound-silica complex is derived from a trivalent phosphorous compound.

Claim 4

Dependent Claim 12 words

The method of claim 2 wherein said silica is a precipitated silica.

Claim 5

Dependent Claim 45 words

The method of claim 1 wherein said trivalent phosphorous compound is a phosphite selected from the group consisting of tris (2,4-di-t-butylpbenyl) phosphine, distearyl pentaerythritol diphosphite, bis (2,4-di-t-butylphenyl) pentaerythritol diphosphite, bis (2,6-di-t-butyle-4-merthylphenyl) peniaerythritol diphosphite, bis (2,4-dicumylphenyl) pentaerythritol diphosphite, bis 2,4,6-tri-t-butylphenyl 2-butyl-2-ethyl-1,3 propanediol phosphite and mixtures thereof.

Claim 6

Dependent Claim 46 words

The method of claim 1 wherein said elastomer contains olefinic unsaturation and is selected from the group consisting of natural rubber, neoprene, polyisoprene, butyl rubber, polybutadiene, styrene-butadiene copolymer, styrene/isoprene/butadiene rubber, methyl methacrylate-butadiene copolymer, isoprene-styrene copolymer, methyl methacrylate-isoprene copolymer, acrylonitrile-isoprene copolymer, acrylonitrile-butadiene copolymer, EPDM and mixtures thereof.

Claim 7

Dependent Claim 42 words

The method of claim 1 wherein said elastomer is a brominated copolymer of isobutylene and p-methyl styrene containing about 0.5 to about 2.5 weight percent bromine and where its isobutylene/p-methyl styrene ratio is in the range of about 50/1 to about 7/1.

Claim 8

Dependent Claim 36 words

The method of claim 1 wherein said rubber composition is thermomechanically mixed at a rubber temperature in a range of from 140° C. to 190° C. for a mixing time of from 4 to 20 minutes.

Claim 9

Dependent Claim 119 words

A rubber composition comprising an intimate mixture of (i) 100 parts by weight of at least one elastomer; with (ii) 1 to 150 phr of a trivalent phosphorous compound-silica complex; wherein said trivalent phosphorous compound is a compound of the formula (I) or (II): wherein each R 1 is independently selected from the group consisting of hydrogen, alkyls, having from 1 to 18 carbon atoms and aryls and arylalkyls having 6 to 15 carbon atoms; and wherein each R 2 is independently selected from the group consisting of halogens, alkyls having from 1 to 18 carbon atoms, aryls and arylalkyls having from 6 to 10 carbon atoms, amino akylamino having from 1 to 10 carbon atoms, sulfur and alkylmercaptans.

Claim 10

Dependent Claim 119 words

A rubber composition comprising an intimate mixture of (i) 100 parts by weight of at least one elastomer; with (ii) 1 to 150 phr of a trivalent phosphorous compound-silica complex; wherein said trivalent phosphorous compound is a compound of the formula (I) or (II): wherein each R 1 is independently selected from the group consisting of hydrogen, alkyls, having from 1 to 18 carbon atoms and aryls and arylalkyls having 6 to 15 carbon atoms; and wherein each R 2 is independently selected from the group consisting of halogens, alkyls having from 1 to 18 carbon atoms, aryls and arylalkyls having from 6 to 10 carbon atoms, amino akylamino having from 1 to 10 carbon atoms, sulfur and alkylmercaptans.

Claim 11

Dependent Claim 26 words

The composition of claim 8 wherein from 0.5 to 25 percent by weight of said trivalent phosphorous compound-silica complex is derived from a trivalent phosphorous compound.

Claim 12

Dependent Claim 12 words

The composition of claim 8 wherein said silica is a precipitated silica.

Claim 13

Dependent Claim 45 words

The composition of claim 8 wherein said trivalent phosphorous compound is a phosphite selected from the group consisting of tris (2,4-di-t-butylphenyl) phosphine, distearyl pentaerythritol diphosphite, bis (2,4-di-t-butylphenyl) pentaerythritol diphosphite, bis (2,6-di-t-butyle-4-merthylphenyl) penlaerythritol diphosphite, bis (2,4-dicumylphenyl) pentaerythritol diphosphite, bis 2,4,6-tri-t-butylphenyl 2-butyl-2-ethyl-1,3 propanediol phosphite and mixtures thereof.

Claim 14

Dependent Claim 45 words

The composition of claim 8 wherein said elastomer containing olefinic unsaturation is selected from the group consisting of natural rubber, neoprene, polyisoprene, butyl rubber, polybutadiene, styrene-butadiene copolymer, styrene/isoprene/butadiene rubber, methyl methacrylate-butadiene copolymer, isoprene-styrene copolymer, methyl methacrylate-isoprene copolymer, acrylonitrile-isoprene copolymer, acrylonitrile-butadiene copolymer, EPDM and mixtures thereof.

Claim 15

Dependent Claim 42 words

The composition of claim 8 wherein said elastomer is a brominated copolymer of isobutylene and p-methyl styrene containing about 0.5 to about 2.5 weight percent bromine and where its isobutylene/p-methyl styrene ratio is in the range of about 50/1 to about 7/1.

Claim 16

Dependent Claim 33 words

A sulfur vulcanized rubber composition which is prepared by heating the composition of claim 8 to a temperature ranging from 100° C. to 200° C. in the presence of a sulfur vulcanizing agent.

Claim 17

Dependent Claim 17 words

The sulfur vulcanized rubber composition of claim 14 in the form of a tire, belt or hose.

Claim 18

Dependent Claim 13 words

A tire having a tread comprised of the composition of claim 15 .

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2005-08-26	2006-02-25	2006-08-27	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2009-08-26	2010-02-25	2010-08-27	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2013-08-26	2014-02-25	2014-08-27	$7700.00	Window Closed / Lapsed

Rubber compositions containing a trivalent phosphorous compound-silica complex

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