US5317062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Styrene-isoprene-butadiene rubber
Assignee: Goodyear Tire and Rubber Co
•
Filing: 1993-07-14
•
Granted: 1994-05-31
•
Expires: 2013-07-14
Abstract
Abstract The subject invention discloses a styrene-isoprene-butadiene rubber which is particularly valuable for use in making truck tire treads, said rubber being comprised of repeat units which are derived from about 5 weight percent to about 20 weight percent styrene, from about 7 weight percent to about 35 weight percent isoprene, and from about 55 weight percent to about 88 weight percent 1,3-butadiene, wherein the repeat units derived from styrene, isoprene and 1,3-butadiene are in essentially random order, wherein from about 25% to about 40% of the repeat units derived from the 1,3-butadiene are of the cis-microstructure, wherein from about 40% to about 60% of the repeat units derived from the 1,3-butadiene are of the trans-microstructure, wherein from about 5% to about 25% of the repeat units derived from the 1,3-butadiene are of the vinyl-microstructure, wherein from about 75% to about 90% of the repeat units derived from the isoprene are of the 1,4-microstructure, wherein from about 10% to about 25% of the repeat units derived from the isoprene are of the 3,4-microstructure, wherein the rubber has a glass transition temperature which is within the range of about -90° C. to about -70° C., wherein the rubber has a number average molecular weight which is within the range of about 150,000 to about 400,000, wherein the rubber has a weight average molecular weight of about 300,000 to about 800,000, and wherein the rubber has an inhomogeneity which is within the range of about 0.5 to about 1.5.
Inventors
- 👤 Michael B. Rodgers
- 👤 Stanley M. Mezynski
- 👤 Adel F. Halasa
- 👤 Wen-Liang Hsu
- 👤 Barry A. Matrana
- 👤 Joel L. Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:39
CPC Classifications
C; C08; C08F; C08F236/00; C08F236/02; C08F236/04; C08F236/10; Y; Y10; Y10S; Y10S152/00; Y10S152/905; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
242 words
A styrene-isoprene-butadiene rubber which is particularly valuable for use in making truck tire treads, said rubber being comprised of repeat units which are derived from about 5 weight percent to about 20 weight percent styrene, from about 7 weight percent to about 35 weight percent isoprene, and from about 55 weight percent to about 88 weight percent 1,3-butadiene, wherein the repeat units derived from styrene, isoprene and 1,3-butadiene are in essentially random order, wherein from about 25% to about 40% of the repeat units derived from the 1,3-butadiene are of the cis-microstructure, wherein from about 40% to about 60% of the repeat units derived from the 1,3-butadiene are of the trans-microstructure, wherein from about 5% to about 25% of the repeat units derived from the 1,3-butadiene are of the vinyl-microstructure, wherein from about 75% to about 90% of the repeat units derived from the isoprene are of the 1,4-microstructure, wherein from about 10% to about 25% of the repeat units derived from the isoprene are of the 3,4-microstructure, wherein the rubber has a glass transition temperature which is within the range of about -90° C. to about -70° C., wherein the rubber has a number average molecular weight which is within the range of about 150,000 to about 400,000, wherein the rubber has a weight average molecular weight of about 300,000 to about 800,000, and wherein the rubber has an inhomogeneity which is within the range of about 0.5 to about 1.5.
Claim 2
Dependent Claim
242 words
A styrene-isoprene-butadiene rubber which is particularly valuable for use in making truck tire treads, said rubber being comprised of repeat units which are derived from about 5 weight percent to about 20 weight percent styrene, from about 7 weight percent to about 35 weight percent isoprene, and from about 55 weight percent to about 88 weight percent 1,3-butadiene, wherein the repeat units derived from styrene, isoprene and 1,3-butadiene are in essentially random order, wherein from about 25% to about 40% of the repeat units derived from the 1,3-butadiene are of the cis-microstructure, wherein from about 40% to about 60% of the repeat units derived from the 1,3-butadiene are of the trans-microstructure, wherein from about 5% to about 25% of the repeat units derived from the 1,3-butadiene are of the vinyl-microstructure, wherein from about 75% to about 90% of the repeat units derived from the isoprene are of the 1,4-microstructure, wherein from about 10% to about 25% of the repeat units derived from the isoprene are of the 3,4-microstructure, wherein the rubber has a glass transition temperature which is within the range of about -90° C. to about -70° C., wherein the rubber has a number average molecular weight which is within the range of about 150,000 to about 400,000, wherein the rubber has a weight average molecular weight of about 300,000 to about 800,000, and wherein the rubber has an inhomogeneity which is within the range of about 0.5 to about 1.5.
Claim 3
Dependent Claim
51 words
A styrene-isoprene-butadiene rubber as specified in claim 1 wherein the repeat units in the rubber are derived from about 6 weight percent to about 15 weight percent styrene, from about 10 weight percent to about 30 weight percent isoprene, and from about 60 weight percent to about 80 weight percent butadiene.
Claim 4
Dependent Claim
33 words
A styrene-isoprene-butadiene rubber as specified in claim 2 wherein at least 90% of the repeat units in the rubber which are derived from styrene are in blocks of two or less repeat units.
Claim 5
Dependent Claim
115 words
A styrene-isoprene-butadiene rubber as specified in claim 3 wherein from about 30 percent to about 35 percent of the repeat units derived from the 1,3-butadiene are of the cis-microstructure, wherein from about 45 to about 55 percent of the repeat units derived from the 1,3-butadiene are of the trans-microstructure, wherein from about 15 percent to about 20 percent of the repeat units derived from the 1,3-butadiene are of the vinyl-microstructure, wherein from about 80 percent to about 85 percent of the repeat units which are derived from the isoprene are of the 1,4-microstructure, and wherein from about 15 percent to about 20 percent of the repeat units derived from the isoprene are of the 3,4-microstructure.
Claim 6
Dependent Claim
49 words
A styrene-isoprene-butadiene rubber as specified in claim 4 wherein said rubber has a number average molecular weight which is within the range of about 250,000 to about 300,000 and wherein said rubber has a weight average molecular weight which is within the range of about 500,000 to about 600,000.
Claim 7
Dependent Claim
25 words
A styrene-isoprene-butadiene rubber as specified in claim 5 wherein said rubber has an inhomogeneity which is within the range of about 0.8 to about 1.2.
Claim 8
Dependent Claim
51 words
A styrene-isoprene-butadiene rubber as specified in claim 6 wherein the repeat units in said rubber are derived from about 8 weight percent to about 12 weight percent styrene, from about 15 weight percent to about 30 weight percent isoprene, and from about 60 weight percent to about 75 weight percent 1,3-butadiene.
Claim 9
Dependent Claim
29 words
A styrene-isoprene-butadiene rubber as specified in claim 7 wherein said rubber has a glass transition temperature which is within the range of about -85° C. to about -75° C.
Claim 10
Dependent Claim
271 words
A pneumatic truck tire having an outer circumferential tread wherein said tread is a sulfur cured rubber composition comprised of, based on 100 parts by weight of rubber, (a) from about 45 to about 75 parts of a styrene-isoprene-butadiene rubber comprised of repeat units which are derived from about 5 weight percent to about 20 weight percent styrene, from about 7 weight percent to about 35 weight percent isoprene, and from about 55 weight percent to about 88 weight percent 1,3-butadiene, wherein the repeat units derived from styrene, isoprene, and 1,3-butadiene are in essentially random order, wherein from about 25% to about 40% of the repeat units derived from the 1,3-butadiene are of the cis-microstructure, wherein from about 40% to about 60% of the repeat units derived from the 1,3-butadiene are of the trans-microstructure, wherein from about 5% to about 25% of the repeat units derived from the 1,3-butadiene are of the vinyl-microstructure, wherein from about 75% to about 90% of the repeat units derived from the isoprene are of the 1,4-microstructure, wherein from about 10% to about 25% of the repeat units derived from the isoprene are of the 3,4-microstructure, wherein the rubber has a glass transition temperature which is within the range of about -90° C. to about -70° C., wherein the rubber has a number average molecular weight which is within the range of 150,000 to 400,000, wherein the rubber has a weight average molecular weight of 300,000 to 800,000, and wherein the rubber has an inhomogeneity which is within the range of 0.5 to 1.5; and (b) from about 25 to about 55 parts of natural rubber.
Claim 11
Dependent Claim
271 words
A pneumatic truck tire having an outer circumferential tread wherein said tread is a sulfur cured rubber composition comprised of, based on 100 parts by weight of rubber, (a) from about 45 to about 75 parts of a styrene-isoprene-butadiene rubber comprised of repeat units which are derived from about 5 weight percent to about 20 weight percent styrene, from about 7 weight percent to about 35 weight percent isoprene, and from about 55 weight percent to about 88 weight percent 1,3-butadiene, wherein the repeat units derived from styrene, isoprene, and 1,3-butadiene are in essentially random order, wherein from about 25% to about 40% of the repeat units derived from the 1,3-butadiene are of the cis-microstructure, wherein from about 40% to about 60% of the repeat units derived from the 1,3-butadiene are of the trans-microstructure, wherein from about 5% to about 25% of the repeat units derived from the 1,3-butadiene are of the vinyl-microstructure, wherein from about 75% to about 90% of the repeat units derived from the isoprene are of the 1,4-microstructure, wherein from about 10% to about 25% of the repeat units derived from the isoprene are of the 3,4-microstructure, wherein the rubber has a glass transition temperature which is within the range of about -90° C. to about -70° C., wherein the rubber has a number average molecular weight which is within the range of 150,000 to 400,000, wherein the rubber has a weight average molecular weight of 300,000 to 800,000, and wherein the rubber has an inhomogeneity which is within the range of 0.5 to 1.5; and (b) from about 25 to about 55 parts of natural rubber.
Claim 12
Dependent Claim
39 words
A pneumatic truck tire as specified in claim 9 which is comprised of (a) from about 55 parts to about 65 parts of the styrene-isoprene-butadiene rubber and (b) from about 35 parts to about 45 parts of natural rubber.
Claim 13
Dependent Claim
283 words
A pneumatic truck tire having an outer circumferential tread wherein said tread is a sulfur cured rubber composition comprised of, based on 100 parts by weight of rubber, (a) from about 50 to about 70 parts of a styrene-isoprene-butadiene rubber comprised of repeat units which are derived from about 5 weight percent to about 20 weight percent styrene, from about 7 weight percent to about 35 weight percent isoprene, and from about 55 weight percent to about 88 weight percent 1,3-butadiene, wherein the repeat units derived from styrene, isoprene, and 1,3-butadiene are in essentially random order, wherein from about 25% to about 40% of the repeat units derived from the 1,3-butadiene are of the cis-microstructure, wherein from about 40% to about 60% of the repeat units derived from the 1,3-butadiene are of the trans-microstructure, wherein from about 5% to about 25% of the repeat units derived from the 1,3-butadiene are of the vinyl-microstructure, wherein from about 75% to about 90% of the repeat units derived from the isoprene are of the 1,4-microstructure, wherein from about 10% to about 25% of the repeat units derived from the isoprene are of the 3,4-microstructure, wherein the rubber has a glass transition temperature which is within the range of about -90° C. to about -70° C., wherein the rubber has a number average molecular weight which is within the range of 150,000 to 400,000, wherein the rubber has a weight average molecular weight of 300,000 to 800,000, and wherein the rubber has an inhomogeneity which is within the range of 0.5 to 1.5; and (b) from about 15 to about 45 parts of natural rubber; and (c) from about 2 to about 20 parts of high cis-1,4-polybutadiene.
Claim 14
Dependent Claim
283 words
A pneumatic truck tire having an outer circumferential tread wherein said tread is a sulfur cured rubber composition comprised of, based on 100 parts by weight of rubber, (a) from about 50 to about 70 parts of a styrene-isoprene-butadiene rubber comprised of repeat units which are derived from about 5 weight percent to about 20 weight percent styrene, from about 7 weight percent to about 35 weight percent isoprene, and from about 55 weight percent to about 88 weight percent 1,3-butadiene, wherein the repeat units derived from styrene, isoprene, and 1,3-butadiene are in essentially random order, wherein from about 25% to about 40% of the repeat units derived from the 1,3-butadiene are of the cis-microstructure, wherein from about 40% to about 60% of the repeat units derived from the 1,3-butadiene are of the trans-microstructure, wherein from about 5% to about 25% of the repeat units derived from the 1,3-butadiene are of the vinyl-microstructure, wherein from about 75% to about 90% of the repeat units derived from the isoprene are of the 1,4-microstructure, wherein from about 10% to about 25% of the repeat units derived from the isoprene are of the 3,4-microstructure, wherein the rubber has a glass transition temperature which is within the range of about -90° C. to about -70° C., wherein the rubber has a number average molecular weight which is within the range of 150,000 to 400,000, wherein the rubber has a weight average molecular weight of 300,000 to 800,000, and wherein the rubber has an inhomogeneity which is within the range of 0.5 to 1.5; and (b) from about 15 to about 45 parts of natural rubber; and (c) from about 2 to about 20 parts of high cis-1,4-polybutadiene.
Claim 15
Dependent Claim
55 words
A pneumatic truck tire as specified in claim 11 wherein said rubber composition is comprised of (a) from about 55 parts to about 65 parts of the styrene-isoprene-butadiene rubber, (b) from about 25 parts to about 40 parts of natural rubber, and (c) from about 5 parts to about 15 parts of high cis 1,4-polybutadiene.
References Cited (Backward Citations)
US4311803A
Cited
US4397994A
Cited
US4603722A
Cited
US4843120A
Cited
US4845165A
Cited
US5047483A
Cited
US5070148A
Cited
US5137998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-05-30 | 1997-11-29 | 1998-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-30 | 2001-11-29 | 2002-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-30 | 2005-11-29 | 2006-05-31 | $7700.00 | Window Closed / Lapsed |