US4032491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roofing composition and resulting product
Assignee: Butler-Schoenke Roofing Specialties Inc
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Filing: 1975-06-06
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Granted: 1977-06-28
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Expires: 1995-06-06
Abstract
Abstract A roofing composition for producing a roofing membrane having good bond strength, resistance to cracking, tensile strength and hardness, comprising 5-40% of asphalt and 60-95% of a block copolymer of the A-B-A type in which each end block A is formed from a vinyl aromatic monomer and midblock B is a hydrogenated polydiene or a polymer of the ethylene/propylene or ethylene/butylene type. A white top coating may be applied over the membrane without staining being visible through the top coating. Optionally the composition may also contain nonstaining carbon black, extender pigments, synthetic or natural resins to vary membrane film properties, and conventional additives, such as stabilizers and fire retardants.
Inventors
- 👤 William Emil Schoenke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:04
CPC Classifications
E; E04; E04D; E04D7/00; C; C09; C09D; C09D153/00; C09D153/02; C09D153/025; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31815
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
182 words
In a fluid, curable roofing composition which is free from terminally-reactive diolefin polymer and from a curing or vulcanization agent and which comprises an intimate admixture of elastomer and asphalt, the improvement wherein: (a) the elastomer is in the form of a midblock B of an A-B-A block copolymer wherein each end block A is a polymer block of a polymerized vinyl aromatic monomer and the midblock B is a polymer block of polymerized aliphatic hydrocarbon monomer, the polymerized aliphatic hydrocarbon monomer having at most a proportion of olefinic unsaturation which is significantly less than that of a polydiene or of a polymerized mixture of dienes, (b) the block copolymer is in solution in a solvent, (c) the asphalt has a softening point of from about 100° to about 175° F., (d) the weight percent of A-B-A block copolymer is from about 60 to about 95 percent and (e) the weight percent of asphalt is from about 40 to about 5 percent, the respective weight percents being based on the total amount of A-B-A block copolymer and asphalt in the roofing composition.
Claim 2
Dependent Claim
182 words
In a fluid, curable roofing composition which is free from terminally-reactive diolefin polymer and from a curing or vulcanization agent and which comprises an intimate admixture of elastomer and asphalt, the improvement wherein: (a) the elastomer is in the form of a midblock B of an A-B-A block copolymer wherein each end block A is a polymer block of a polymerized vinyl aromatic monomer and the midblock B is a polymer block of polymerized aliphatic hydrocarbon monomer, the polymerized aliphatic hydrocarbon monomer having at most a proportion of olefinic unsaturation which is significantly less than that of a polydiene or of a polymerized mixture of dienes, (b) the block copolymer is in solution in a solvent, (c) the asphalt has a softening point of from about 100° to about 175° F., (d) the weight percent of A-B-A block copolymer is from about 60 to about 95 percent and (e) the weight percent of asphalt is from about 40 to about 5 percent, the respective weight percents being based on the total amount of A-B-A block copolymer and asphalt in the roofing composition.
Claim 3
Dependent Claim
38 words
A composition according to claim 1 wherein the average molecular weight of each A endblock is from about 8,000 to about 45,000, and the average molecular weight of the B midblock is from about 40,000 to about 125,000.
Claim 4
Dependent Claim
18 words
A sprayable composition according to claim 1 wherein the elastomer and asphalt are essentially uniformly dispersed in solvent.
Claim 5
Dependent Claim
14 words
A composition according to claim 1 wherein each endblock A is a styrene polymer.
Claim 6
Dependent Claim
32 words
A composition according to claim 1 wherein the polymerized aliphatic hydrocarbon is polybutadiene and the A-B-A block copolymer is in a hydrogenated form in which unsaturation of the polybutadiene is significantly reduced.
Claim 7
Dependent Claim
15 words
A composition according to claim 1 wherein midblock B is a polymerized mixture of mono-olefins.
Claim 8
Dependent Claim
15 words
An asphalt-base roof intimately bonded to solids of a roofing composition according to claim 6.
Claim 9
Dependent Claim
26 words
An asphalt-base roof covered with and intimately bonded to solids of a roofing composition according to claim 6 and which further bears a white finish coating.
Claim 10
Dependent Claim
15 words
A composition according to claim 6 wherein the mixture is that of ethylene and butylene.
Claim 11
Dependent Claim
11 words
A composition according to claim 9 wherein the butylene is isobutylene.
Claim 12
Dependent Claim
33 words
A composition according to claim 1 which further comprises from about 15 to about 100 parts by weight of medium thermal non-staining carbon black per 100 parts by weight of the block copolymer.
Claim 13
Dependent Claim
15 words
A composition according to claim 11 which further comprises a minor proportion of hydrocarbon resin.
Claim 14
Dependent Claim
17 words
A composition according to claim 12 wherein the resin is a copolymer of vinyl toluene and α-methylstyrene.
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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) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |