Transparent and colorable elastomeric compositions are provided. The transparent elastomeric compositions can be covulcanized with rubbers such as polybutadiene, polyisoprene, styrene-butadiene rubber, styrene-isoprene-butadiene rubber, isoprene-butadiene rubber, or natural rubber and polybutene pro
Transparent and colorable elastomeric compositions are provided. The transparent elastomeric compositions can be covulcanized with rubbers such as polybutadiene, polyisoprene, styrene-butadiene rubber, styrene-isoprene-butadiene rubber, isoprene-butadiene rubber, or natural rubber and polybutene processing oil. The colorable rubber compositions have sufficient properties to function as a reinforcing member in a shoe sole or automobile tire. Preferably, both the transparent and colorable elastomeric compositions include at least one copolymer of a C4 to C7 isoolefin and a p-methylstyrene, silica and a high cis-polybutadiene rubber.
대표청구항▼
We claim: 1. A reinforced, colorable elastomeric composition having utility as a tire sidewall or shoe sole, consisting essentially of at least one random copolymer of a C4 to C7 isoolefin and p-methylstyrene derived units, reinforced with from 30 to 80 phr of at least one non-black filler; a cure
We claim: 1. A reinforced, colorable elastomeric composition having utility as a tire sidewall or shoe sole, consisting essentially of at least one random copolymer of a C4 to C7 isoolefin and p-methylstyrene derived units, reinforced with from 30 to 80 phr of at least one non-black filler; a cure system, and polybutene processing oil having a number average molecular weight of at least 400. 2. The composition of claim 1, the cure system comprising an accelerating agent selected from the group consisting of stearic acid, tetramethylthiuram disulfide, 4,4'-dithiodimorpholine, tetrabutylthiuram disulfide, benzothiazyl disulfide, hexamethylene-1,6-bisthiosulfate disodium salt dihydrate, 2-(morpholinothio) benzothiazole, N-oxydiethylene thiocarbamyl-N-oxydiethylene sulfonamide, zinc 2-ethyl hexanoate, and N,N'-diethyl thiourea. 3. The composition of claim 2, wherein the accelerating agent is N,N'-diethyl thiourea. 4. The composition of claim 1, wherein the non-black filler is selected from the group consisting of silicas, clays, talcs, calcium carbonates, aluminum oxides, titanium oxides, and zinc oxides, and mixtures thereof. 5. The composition of claim 1, wherein the composition does not contain carbon black filler. 6. The composition of claim 1, wherein the cure system comprises a compound selected from the group consisting of ZnO, CaO, MgO, Al2O3, CrO3, FeO, Fe2O3, NiO, Zn(Stearate)2, Ca(Stearate)2, Mg(Stearate)2, and Al(Stearate)3. 7. The composition of claim 1, wherein the cure system further comprises an alkylperoxide. 8. The composition of claim 1, wherein the processing oil has a number average molecular weight of from 400 to 10,000. 9. The composition of claim 1, wherein the number average molecular weight of the polybutene polymer is not greater than 10,000. 10. The composition of claim 1, wherein the polybutene is present in the composition in an amount from 2 to 30 phr. 11. A colorable tire sidewall comprising the composition of claim 1. 12. A shoe sale comprising the composition of claim 1. 13. A reinforced, colorable elastomeric composition having utility as a tire sidewall or shoe sole, consisting essentially of at least one random copolymer of a C4 to C7 isoolefin and p-methylstyrene derived units reinforced with from 30 to 80 phr of at least one non-black filler; a cure system, and polybutene processing oil having a viscosity of from 10 to 6000 cSt at 100�� C. 14. The composition of claim 13, of the cure system comprising an accelerating agent selected from the group consisting of stearic acid, tetramethylthiuram disulfide, 4,4'-dithiodimorpholine, tetrabutylthiuram disulfide, benzothiazyl disulfide, hexamethylene-1,6-bisthiosulfate disodium salt dihydrate, 2-(morpholinothio) benzothiazole, N-oxydiethylene thiocarbamyl-N-oxydiethylene sulfonamide, zinc 2-ethyl hexanoate, and N,N'-diethyl thiourea. 15. The composition or claim 14, wherein the accelerating agent is N,N'-diethyl thiourea. 16. The composition of claim 13, wherein the copolymer is present in an amount of from 20 to 50 phr. 17. The composition of claim 13, wherein the non-black filler is selected from the group consisting of silicas, clays, talcs, calcium carbonates, aluminum oxides, titanium oxides, and zinc oxides, and mixtures thereof. 18. The composition of claim 13, the composition does not contain carbon black filler. 19. The composition of claim 13, wherein the cure system includes a compound selected from the group consisting of ZnO, CaO, MgO, Al2O3, CrO3, FeO, Fe2O3, NiO, Zn(Stearate)2, Ca(Stearate)2, Mg(Stearate)2, and Al(Stearate)3. 20. The composition of claim 13, wherein the cure system further comprises an alkylperoxide. 21. The composition of claim 13, wherein the processing oil has a number average molecular weight of from 400 to 10,000. 22. The composition of claim 13, wherein the number average molecular weight of the polybutene polymer is less than 10,000. 23. The composition of claim 13, wherein the polybutene is present in the composition in an amount from 2 to 30 phr. 24. The composition of claim 1, wherein the composition does not contain carbon black filler and the composition has a lightness value in the range of 80.6 to 85.76 as determined using a Minolta CR-100 ChromaMeter. 25. The composition of claim 1, wherein naphthenic oil is substantially absent. 26. The composition of claim 13, wherein the composition does not contain carbon black filler and the composition has a lightness value in the range of 80.6 to 85.76 as determined using a Minolta CR-100 ChromaMeter. 27. The composition of claim 13, wherein naphthenic oil is substantially absent.
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