Patent US4248759A successfully refreshed from Google Patents.
US4248759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Construction adhesive
Assignee: Shell USA Inc
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Filing: 1979-09-12
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Granted: 1981-02-03
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Expires: 1999-09-12
Abstract
Abstract A construction adhesive is described which is particularly useful in attaching foamed polystyrene sheets to substrates. These adhesives comprise a particular linear or radial ABA-type monoalkenyl arene-conjugated diene block copolymer and a mixed cyclohexane/normal hexane solvent.
Inventors
- 👤 David J. St. Clair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:51
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/12; C08J5/124; C08J5/125; C09; C09J; C09J153/00; C09J153/02; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/06; C08L; C08L2666/00; C08L2666/28
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
105 words
A solvent-based adhesive useful for adhering foamed polystyrene sheets to substrates, said adhesive comprising: (a) a linear or radial ABA-type block copolymer where the A blocks are polymer blocks of monoalkenyl arenes, the B blocks are polymer blocks of conjugated dienes, the weight average molecular weight of said A blocks is about 10,500 to about 12,500, and the weight percent of monoalkenyl arene in said block copolymer is between about 16 percent and about 26 percent; and (b) a solvent comprising a mixture of 5 to 30 weight percent of a cycloaliphatic solvent and 95 to 70 weight percent of a paraffinic or isoparaffinic solvent.
Claim 2
Dependent Claim
105 words
A solvent-based adhesive useful for adhering foamed polystyrene sheets to substrates, said adhesive comprising: (a) a linear or radial ABA-type block copolymer where the A blocks are polymer blocks of monoalkenyl arenes, the B blocks are polymer blocks of conjugated dienes, the weight average molecular weight of said A blocks is about 10,500 to about 12,500, and the weight percent of monoalkenyl arene in said block copolymer is between about 16 percent and about 26 percent; and (b) a solvent comprising a mixture of 5 to 30 weight percent of a cycloaliphatic solvent and 95 to 70 weight percent of a paraffinic or isoparaffinic solvent.
Claim 3
Dependent Claim
15 words
A composition according to claim 1 wherein said solvent mixture comprises normal hexane and cyclohexane.
Claim 4
Dependent Claim
18 words
A composition according to claims 1 or 2 wherein said block copolymer is a linear styrene-butadiene-styrene block copolymer.
Claim 5
Dependent Claim
28 words
A composition according to claim 3 wherein said styrene block molecular weight is about 12,800 and the weight percent styrene of said block copolymer is about 22 percent.
Claim 6
Dependent Claim
25 words
A composition according to claim 2 wheren the amount of normal hexane in said solvent mixture is 90% and the amount of cyclohexane is 10%.
Claim 7
Dependent Claim
30 words
A composition according to claim 1 wherein the amount of block copolymer is 100 parts by weight and the amount of solvent mixture is 100 to 800 parts by weight.
Claim 8
Dependent Claim
17 words
A composition according to claim 6 also including 0 to 600 parts by weight of a filler.
Claim 9
Dependent Claim
20 words
A composition according to claim 6 also including 0 to 200 parts by weight of an A block compatible resin.
Claim 10
Dependent Claim
18 words
A composition according to claim 6 also including 0 to 300 parts by weight of a tackifying resin.
Claim 11
Dependent Claim
41 words
A composition according to claim 1 wherein said cycloaliphatic solvent is selected from the group consisting of cyclohexane and methylcyclohexane and said paraffinic or isoparaffinic solvent is selected from the group consisting of normal hexane, isohexane, pentane, isopentane, heptane and isoheptane.
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) | 1984-02-03 | 1984-08-04 | 1985-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-03 | 1988-08-04 | 1989-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-03 | 1992-08-04 | 1993-02-03 | $7700.00 | Window Closed / Lapsed |