US4835199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bituminous composition comprising a blend of bitumen and a thermoplastic elastomer
Assignee: Bridgestone Firestone Inc
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Filing: 1987-04-10
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Granted: 1989-05-30
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Expires: 2007-04-10
Abstract
Abstract A bituminous composition comprising a blend of bitumen and a thermoplastic elastomer containing at least two polymer blocks wherein one of said polymer blocks is a crystalline polymer block and one of said polymer blocks is an amorphous polymer block, is provided. The bituminous composition has particular application as a roof coating or waterproofing material or road paving material.
Inventors
- 👤 Shingo Futamura
- 👤 Georg G. A. Bohm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:42
CPC Classifications
C; C08; C08L; C08L95/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
109 words
A bituminous composition comprising a blend of: (a) from about 65% to about 99% by weight of bitumen; and (b) from about 1% to about 35% by weight of a thermoplastic elastomer containing two polymer blocks, wherein one of said polymer blocks is a crystalline polymer block of a hydrogenated polybutadiene having a Tm above 40° C. and one of said polymer blocks is an amorphous polymer block of a hydrogenated random copolymer of a vinyl arene and 1,3-butadiene having a Tg of 0° C. or lower and wherein the weight ratio of crystalline polymer block to amorphous polymer block is within the range of from 10:90 to 80:20.
Claim 2
Dependent Claim
109 words
A bituminous composition comprising a blend of: (a) from about 65% to about 99% by weight of bitumen; and (b) from about 1% to about 35% by weight of a thermoplastic elastomer containing two polymer blocks, wherein one of said polymer blocks is a crystalline polymer block of a hydrogenated polybutadiene having a Tm above 40° C. and one of said polymer blocks is an amorphous polymer block of a hydrogenated random copolymer of a vinyl arene and 1,3-butadiene having a Tg of 0° C. or lower and wherein the weight ratio of crystalline polymer block to amorphous polymer block is within the range of from 10:90 to 80:20.
Claim 3
Dependent Claim
33 words
The composition of claim 1 wherein said blend comprises from about 80% to about 98% by weight of said bitumen and from about 2% to about 20% by weight of said thermoplastic elastomer.
Claim 4
Dependent Claim
13 words
The composition of claim 1 wherein said bitumen is a petroluem based asphalt.
Claim 5
Dependent Claim
11 words
The composition of claim 1 wherein said bitumen is coal tar.
Claim 6
Dependent Claim
98 words
The composition of claim 1 wherein said thermoplastic elastomer is a hydrogenated diblock copolymer consisting essentially of from about 20% to about 70% by weight of a hydrogenated block of polybutadiene and from about 30% to about 80% by weight of a hydrogenated block of a random copolymer of a vinyl arene and 1,3-butadiene containing from about 5% to about 50% by weight of vinyl arene and from about 50% to about 95% by weight of butadiene, said hydrogenated diblock copolymer having a residual unsaturation content of less than 20% of the original unsaturation level prior to hydrogenation.
Claim 7
Dependent Claim
11 words
The composition of claim 5 wherein said vinyl arene is styrene.
Claim 8
Dependent Claim
19 words
The composition of claim 5 wherein said polybutadiene had a 1,2-microstructure content of less than 30% prior to hydrogenation.
Claim 9
Independent Claim
112 words
A method of preparing a bituminous composition which comprises blending: (a) from about 65 to about 99% by weight of bitumen; and (b) from about 1 to about 35% by weight of a thermoplastic elastomer containing two polymer blocks, wherein one of said polymer blocks is a crystalline polymer block of a hydrogenated polybutadiene having a Tm above 40° C. and one of said polymer blocks is an amorphous polymer block of a hydrogenated random copolymer of a vinyl arene and 1,3-butadiene having a Tg of 0° C. or lower and wherein the weight ratio of crystalline polymer block to amorphous polymer block is within the range of from 10:90 to 80:20.
Claim 10
Independent Claim
112 words
A method of preparing a bituminous composition which comprises blending: (a) from about 65 to about 99% by weight of bitumen; and (b) from about 1 to about 35% by weight of a thermoplastic elastomer containing two polymer blocks, wherein one of said polymer blocks is a crystalline polymer block of a hydrogenated polybutadiene having a Tm above 40° C. and one of said polymer blocks is an amorphous polymer block of a hydrogenated random copolymer of a vinyl arene and 1,3-butadiene having a Tg of 0° C. or lower and wherein the weight ratio of crystalline polymer block to amorphous polymer block is within the range of from 10:90 to 80:20.
Claim 11
Dependent Claim
33 words
The method of claim 8 wherein said blend comprises from about 80 to about 98% by weight of said bitumen and from about 2% to about 20% by weight of said thermoplastic elastomer.
Claim 12
Dependent Claim
13 words
The method of claim 8 wherein said bitumen is a petroleum based asphalt.
Claim 13
Dependent Claim
11 words
The method of claim 8 wherein said bitumen is coal tar.
Claim 14
Dependent Claim
98 words
The method of claim 8 wherein said thermoplastic elastomer is a hydrogenated diblock copolymer consisting essentially of from about 20% to about 70% by weight of a hydrogenated block of polybutadiene and from about 30% to about 80% by weight of a hydrogenated block of a random copolymer of a vinyl arene and 1,3-butadiene containing from about 5% to about 50% by weight of vinyl arene and from about 50% to about 95% by weight of butadiene, said hydrogenated diblock copolymer having a residual unsaturation content of less than 20% of the original unsaturation level prior to hydrogenation.
Claim 15
Dependent Claim
11 words
The method of claim 8 wherein said vinyl arene is styrene.
Claim 16
Dependent Claim
19 words
The method of claim 8 wherein said polybutadiene had a 1,2-microstructure content of less than 30% prior to hydrogenation.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |