US4640730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of adhering roofing materials
Assignee: Ashland LLC
•
Filing: 1985-03-22
•
Granted: 1987-02-03
•
Expires: 2005-03-22
Abstract
Abstract This process of adhering sheet roofing materials uses a SBS block copolymer mixed with hydrocarbon resin. No primer is needed, both dry bonding with heat and wet bonding processes have good green strength.
Inventors
- 👤 Roger L. Streets
- 👤 Thomas G. Rabito
- 👤 David N. Peresie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:38
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/12; C08J5/124; C09; C09D; C09D153/00; C09D153/02; C08J2323/00; C08J2323/02; C08J2323/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
83 words
A process of adhering roofing materials consisting essentially of the steps of (a) coating edges of EPDM roofing materials with an adhesive composition consisting essentially of an admixture of 100 parts by weight of a thermoplastic block copolymer, from 10 to 150 parts by weight of an aromatic hydrocarbon resin, and solvent, (b) allowing said coated edges to dry, (c) joining said dried coated edges, and (d) heating said joined edges to a temperature greater than 300° F. and less than 500° F.
Claim 2
Dependent Claim
83 words
A process of adhering roofing materials consisting essentially of the steps of (a) coating edges of EPDM roofing materials with an adhesive composition consisting essentially of an admixture of 100 parts by weight of a thermoplastic block copolymer, from 10 to 150 parts by weight of an aromatic hydrocarbon resin, and solvent, (b) allowing said coated edges to dry, (c) joining said dried coated edges, and (d) heating said joined edges to a temperature greater than 300° F. and less than 500° F.
Claim 3
Dependent Claim
17 words
The process as recited in claim 1 wherein said block copolymer is a thermoplastic styrenebutadiene-styrene block copolymer.
Claim 4
Dependent Claim
35 words
The process as recited in claim 1 wherein said adhesive composition consists essentially of an admixture of 100 parts by weight of block copolymer, from 25 to 75 parts by weight hydrocarbon resin and solvent.
Claim 5
Dependent Claim
16 words
The process as recited in claim 1 wherein said aromatic hydrocarbon resin is polyalpha methyl styrene.
Claim 6
Dependent Claim
12 words
The process as recited in claim 1 wherein said solvent is toluene.
Claim 7
Dependent Claim
17 words
The process as recited in claim 1 wherein said block copolymer is a thermoplastic styrene-isoprenestyrene block copolymer.
Claim 8
Dependent Claim
21 words
The process as recited in claim 6 wherein said adhesive composition further comprises 2 parts sulfur and 5 parts zinc oxide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-02 | 1990-08-04 | 1991-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-02 | 1994-08-04 | 1995-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-02 | 1998-08-04 | 1999-02-03 | $7700.00 | Window Closed / Lapsed |