US4172860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive composition
Assignee: Goodyear Tire and Rubber Co
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Filing: 1978-10-02
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Granted: 1979-10-30
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Expires: 1998-10-02
Abstract
Abstract An adhesive composition having particular reference to solution cast and hot melt adhesives comprised of an admixture of a tackifier and an unvulcanized block polymer product produced by the process of contacting conjugated diolefinic monomers mixed with a suitable amount of divinylbenzene under solution polymerization conditions with a polystyryl lithium catalyst.
Inventors
- 👤 George W. Feeney
- 👤 Thomas G. Chambers
- 👤 Shirley L. Church
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:39
CPC Classifications
C; C09; C09J; C09J153/00; C09J153/02; C08; C08L; C08L2666/00; C08L2666/02; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/1452; Y10T428/28; Y10T428/2852; Y10T428/2878; Y10T428/2883
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
238 words
An adhesive composition comprises an admixture of (A) 100 parts by weight of an unvulcanized branched, thermoplastic block polymer product produced by the process consisting essentially of contacting a diolefin selected from the group consisting of at least one of isoprene and 1,3-butadiene pre-mixed with a suitable amount of divinylbenzene, under solution polymerization conditions with a polystyryl lithium catalyst, said amount of divinylbenzene being from about 0.5/l to about 10/l moles of divinylbenzene per mole of active lithium catalyst to form said thermoplastic block polymer that is essentially non-gel and has the divinylbenzene coupling agent attached to the diolefinic portion of the block polymer, and (B) about 50 to about 150 parts by weight tackifier therefor; where said tackifier is a resin having a softening point in the range of about 50° C. to about 150° C. and is selected from at least one of terpene resins and synthetic hydrocarbon resins derived essentially as diolefin/olefin copolymers prepared by polymerizing the monomers in the presence of a catalyst selected from aluminum chloride or boron trifluoride or boron trifluoride etherate; and where, in said block copolymer, the polystyrene block molecular weight is in the range of about 8,000 to about 45,000, the polydiolefin block has a molecular weight in the range of about 10,000 to about 100,000, ignoring the DVB effect, with the overall styrene content in the block copolymer being in the range of 10 to 35 weight percent.
Claim 2
Dependent Claim
238 words
An adhesive composition comprises an admixture of (A) 100 parts by weight of an unvulcanized branched, thermoplastic block polymer product produced by the process consisting essentially of contacting a diolefin selected from the group consisting of at least one of isoprene and 1,3-butadiene pre-mixed with a suitable amount of divinylbenzene, under solution polymerization conditions with a polystyryl lithium catalyst, said amount of divinylbenzene being from about 0.5/l to about 10/l moles of divinylbenzene per mole of active lithium catalyst to form said thermoplastic block polymer that is essentially non-gel and has the divinylbenzene coupling agent attached to the diolefinic portion of the block polymer, and (B) about 50 to about 150 parts by weight tackifier therefor; where said tackifier is a resin having a softening point in the range of about 50° C. to about 150° C. and is selected from at least one of terpene resins and synthetic hydrocarbon resins derived essentially as diolefin/olefin copolymers prepared by polymerizing the monomers in the presence of a catalyst selected from aluminum chloride or boron trifluoride or boron trifluoride etherate; and where, in said block copolymer, the polystyrene block molecular weight is in the range of about 8,000 to about 45,000, the polydiolefin block has a molecular weight in the range of about 10,000 to about 100,000, ignoring the DVB effect, with the overall styrene content in the block copolymer being in the range of 10 to 35 weight percent.
Claim 3
Dependent Claim
41 words
The adhesive composition of claim 1 where said tackifier is a resin prepared by polymerizing piperylene and at least one olefin containing 4 to 6 carbon atoms in a diolefin/olefin mole ratio in the range of about 0.6/l to about 4/l.
Claim 4
Dependent Claim
72 words
The adhesive composition of claim 2 where said tackifier is a resin prepared by polymerizing piperylene and at least one olefin containing 5 to 6 carbon atoms in a diolefin/olefin mole ratio in the range of about 0.8/l to about 2.5/l and is optionally modified by copolymerizing therewith about 5 to about 20, weight percent based on the total monomers, of at least one additional monomer selected from α-methyl styrene and dicyclopentadiene.
Claim 5
Dependent Claim
31 words
The adhesive composition of claim 3 where said tackifier is a resin prepared by polymerizing in the presence of aluminum chloride, piperylene and at least one olefin comprised primarily of 2-methyl-2-butene.
Claim 6
Dependent Claim
13 words
The adhesive composition of claim 1 as a solution cast pressure sensitive adhesive.
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) | 1982-10-29 | 1983-04-30 | 1983-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-29 | 1987-04-30 | 1987-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-29 | 1991-04-30 | 1991-10-30 | $7700.00 | Window Closed / Lapsed |