US4778852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roofing composition
Assignee: Bridgestone Firestone Inc
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Filing: 1987-04-06
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Granted: 1988-10-18
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Expires: 2007-04-06
Abstract
Abstract A roofing composition comprising a blend of 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, and a vulcanizable elastomer selected from the group consisting of EPDM, butyl, neutralized sulfonated EPDM, neutralized sulfonated butyl and mixtures thereof. The roofing compositions have particular application as roofing membranes (i.e. roof sheeting) or roof flashing materials.
Inventors
- 👤 Shingo Futamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:50
CPC Classifications
C; C08; C08L; C08L53/00; C08L53/02; C08L53/025; C08K; C08K3/00; C08K3/02; C08K3/04; C08K3/06; C08K3/18; C08K3/20; C08K3/22; C08K3/34; C08K3/346; C08K5/00; C08K5/0008; C08K5/0025; C08K5/04; C08K5/09; C08K5/16; C08K5/20; C08L23/00; C08L23/02; C08L23/16; C08L23/18; C08L23/20; C08L23/22; C08L23/26; C08L23/32; C08L91/00; C09; C09D; C09D153/00; C09D153/02; C09D153/025; C08L2312/00; C08L2666/00; C08L2666/02; C08L2666/24
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
137 words
A roofing composition comprising a blend of: (a) from about 5 to about 95 parts by weight of a thermoplastic elastomer containing at least two polymer blocks, wherein one of said polymer blocks is a crystalline polymer block having a Tm above 40° C. and one of said polymer blocks is an amorphous polymer block having a Tg of 0° C. or lower and wherein said thermoplastic elastomer contains from about 10 to about 80 percent by weight of crystalline polymer block and from about 20 to about 90 percent by weight of amorphous polymer block; and (b) from about 5 to about 95 parts by weight of a vulcanizable elastomer selected from the group consisting of an ethylene, propylene, diene monomer terpolymer, butyl, neutralized sulfonated ethylene, propylene, diene monomer terpolymer, neutralized sulfonated butyl and mixtures thereof.
Claim 2
Dependent Claim
137 words
A roofing composition comprising a blend of: (a) from about 5 to about 95 parts by weight of a thermoplastic elastomer containing at least two polymer blocks, wherein one of said polymer blocks is a crystalline polymer block having a Tm above 40° C. and one of said polymer blocks is an amorphous polymer block having a Tg of 0° C. or lower and wherein said thermoplastic elastomer contains from about 10 to about 80 percent by weight of crystalline polymer block and from about 20 to about 90 percent by weight of amorphous polymer block; and (b) from about 5 to about 95 parts by weight of a vulcanizable elastomer selected from the group consisting of an ethylene, propylene, diene monomer terpolymer, butyl, neutralized sulfonated ethylene, propylene, diene monomer terpolymer, neutralized sulfonated butyl and mixtures thereof.
Claim 3
Dependent Claim
100 words
The composition of claim 1 wherein said thermoplastic elastomer is a hydrogenated diblock copolymer consisting essentially of from about 20 to about 70 percent by weight of a hydrogenated block of polybutadiene and from about 30 to about 80 percent of a hydrogenated block of a random copolymer of a vinyl arene and 1,3-butadiene containing from about 5 to about 50 percent by weight of vinyl arene and from about 50 to about 95 percent 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 4
Dependent Claim
11 words
The composition of claim 2 wherein said vinyl arene is styrene.
Claim 5
Dependent Claim
19 words
The composition of claim 2 wherein said polybutadiene has a 1,2-microstructure content of less than 30% prior to hydrogenation.
Claim 6
Dependent Claim
16 words
The composition of claim 1 wherein said vulcanizable elastomer is an ethylene, propylene, diene monomer terpolymer.
Claim 7
Dependent Claim
14 words
The composition of claim 1 wherein said vulcanizable elastomer is a neutralized sulfonated EPDM.
Claim 8
Dependent Claim
32 words
The composition of claim 1 wherein said blend comprises from 10 to 80 parts by weight of said thermoplastic elastomer and from 20 to 90 parts by weight of said vulcanizable elastomer.
Claim 9
Dependent Claim
22 words
The composition of claim 1 further comprising vulcanizing agents selected from the group consisting of sulfur, sulfur donor compounds and mixtures thereof.
Claim 10
Dependent Claim
23 words
The compositions of claim 8 wherein said sulfur donor compounds are selected from the group consisting of thiuram polysulfides and salts of dialkyldithiocarbomates.
Claim 11
Dependent Claim
9 words
The composition of claim 8 further comprising vulcanizing accelerators.
Claim 12
Dependent Claim
22 words
The composition of claim 10 wherein said vulcanizing accelerators are selected from the group consisting of thioureas, thiuram monosulfides and benzothiazole sulfenamides.
Claim 13
Dependent Claim
25 words
The composition of claim 1 further comprising fillers, processing or softening oils, antioxidants, antiozonants, UV stabilizers, cure retarders, processing aids, tackifying resins and flame retardants.
Claim 14
Dependent Claim
25 words
The composition of claim 8 further comprising fillers, processing or softening oils, antioxidants, antiozonants, UV stabilizers, cure retarders, processing aids, tackifying resins and flame retardants.
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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) | 1991-10-18 | 1992-04-18 | 1992-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-18 | 1996-04-18 | 1996-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-18 | 2000-04-18 | 2000-10-18 | $7700.00 | Window Closed / Lapsed |