US4080348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tacky adhesive
Assignee: Johnson and Johnson
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Filing: 1976-05-18
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Granted: 1978-03-21
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Expires: 1996-05-18
Abstract
Abstract A highly tacky pressure-sensitive adhesive which possesses superior "finger tack" and skin adhesion, as well as the ability to adhere to oily surfaces. The adhesive comprises a thermoplastic component and a resin component and the thermoplastic component consists essentially of about 55-85 parts, preferably about 60-75 parts, of a simple A-B block copolymer wherein the A-blocks are derived from styrene and the B-blocks are derived from isoprene, and about 15-45 parts, preferably about 25-40 parts, of a linear or radial A-B-A block copolymer. The total styrene-derived A-block content of the copolymers is less than 20 percent of their total weight and the A-blocks of the A-B block copolymers constitute about 10-18, preferably about 12-16, percent by weight of the A-B copolymers. The resin component may be conventional.
Inventors
- 👤 Ralf Korpman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:18
CPC Classifications
C; C09; C09J; C09J153/00; C09J153/02; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/387; C08; C08L; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
143 words
A pressure-sensitive adhesive composition comprising a thermoplastic elastomeric component and a resin component; said thermoplastic elastomeric component consisting essentially of about 55-85 parts of a simple A-B block copolymer wherein the A-blocks are derived from styrene or styrene homologues and the B-blocks are derived from isoprene, and about 15-45 parts of a linear or radial A-B-A block copolymer wherein the A-blocks are derived from styrene or styrene homologues and the B-blocks are derived from conjugated dienes or lower alkenes, the A-blocks in the A-B block copolymer constituting about 10-18 percent by weight of the A-B copolymer and the total A-B and A-B-A copolymers comprising not above about 20 percent styrene; said resin component consisting essentially of about 20-300 parts of tackifier resin for said elastomeric component; all of said parts being parts per one hundred parts by weight of the thermoplastic elastomeric component.
Claim 2
Dependent Claim
143 words
A pressure-sensitive adhesive composition comprising a thermoplastic elastomeric component and a resin component; said thermoplastic elastomeric component consisting essentially of about 55-85 parts of a simple A-B block copolymer wherein the A-blocks are derived from styrene or styrene homologues and the B-blocks are derived from isoprene, and about 15-45 parts of a linear or radial A-B-A block copolymer wherein the A-blocks are derived from styrene or styrene homologues and the B-blocks are derived from conjugated dienes or lower alkenes, the A-blocks in the A-B block copolymer constituting about 10-18 percent by weight of the A-B copolymer and the total A-B and A-B-A copolymers comprising not above about 20 percent styrene; said resin component consisting essentially of about 20-300 parts of tackifier resin for said elastomeric component; all of said parts being parts per one hundred parts by weight of the thermoplastic elastomeric component.
Claim 3
Dependent Claim
23 words
A pressure-sensitive adhesive composition according to claim 1, wherein the styrene-derived A-blocks constitute about 12- 16 percent by weight of A-B block copolymer.
Claim 4
Dependent Claim
36 words
A pressure-sensitive adhesive composition according to claim 1, which comprises about 60-75 parts of the A-B copolymer and about 25-40 parts of the A-B-A copolymer, per one hundred parts by weight of the thermoplastic elastomeric component.
Claim 5
Dependent Claim
23 words
A pressure-sensitive adhesive composition according to claim 1, wherein the styrene-derived A-blocks constitute about 5-50 percent by weight of the A-B-A block copolymer.
Claim 6
Dependent Claim
22 words
A pressure-sensitive adhesive composition according to claim 4, wherein the A-blocks constitute about 10-30 percent by weight of the A-B-A block copolymer.
References Cited (Backward Citations)
US3239478A
Cited
US3441530A
Cited
US3325430A
Cited
US3519585A
Cited
US3632540A
Cited
US3649579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-20 | 1981-09-19 | 1982-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-20 | 1985-09-19 | 1986-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-20 | 1989-09-19 | 1990-03-21 | $7700.00 | Window Closed / Lapsed |