US4089824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-melt pressure-sensitive adhesives based on block copolymers
Assignee: BASF SE
•
Filing: 1976-10-18
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Granted: 1978-05-16
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Expires: 1996-10-18
Abstract
Abstract Hot-melt pressure-sensitive adhesive composition based on a rubbery block copolymer of a monovinyl-aromatic compound or monovinylidene-aromatic compound and butadiene.
Inventors
- 👤 Klaus Bronstert
- 👤 Volker Ladenberger
- 👤 Wolfgang Druschke
- 👤 Wolfgang Groh
- 👤 Helmut Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:12
CPC Classifications
C; C09; C09J; C09J125/00; C09J153/00; C09J153/02; C09J153/025; C08; C08L; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
127 words
A hot-melt pressure-sensitive adhesive composition consisting essentially of a mixture of (a) 100 parts by weight of a rubbery radial block copolymer with terminal non-elastomeric polymer blocks of a monovinyl-aromatic or monovinylidene-aromatic compound and butadiene-based elastomeric polymer blocks in the middle position, the olefinic double bonds of the block copolymer having been reduced to a residual content of less than 5 percent by selective hydrogenation and the elastomeric polybutadiene blocks having had, prior to hydrogenation, a 1,2-vinyl content of from 30 to 70 percent by weight, and the number-average molecular weight of the branched block copolymer being from 30,000 to 300,000, (b) from 25 to 300 parts by weight of a tackifier resin and (c) from 10 to 100 parts by weight of a rubber extender oil.
Claim 2
Dependent Claim
127 words
A hot-melt pressure-sensitive adhesive composition consisting essentially of a mixture of (a) 100 parts by weight of a rubbery radial block copolymer with terminal non-elastomeric polymer blocks of a monovinyl-aromatic or monovinylidene-aromatic compound and butadiene-based elastomeric polymer blocks in the middle position, the olefinic double bonds of the block copolymer having been reduced to a residual content of less than 5 percent by selective hydrogenation and the elastomeric polybutadiene blocks having had, prior to hydrogenation, a 1,2-vinyl content of from 30 to 70 percent by weight, and the number-average molecular weight of the branched block copolymer being from 30,000 to 300,000, (b) from 25 to 300 parts by weight of a tackifier resin and (c) from 10 to 100 parts by weight of a rubber extender oil.
Claim 3
Dependent Claim
37 words
An adhesive composition as set forth in claim 1, wherein the rubbery radial block copolymer contains from 20 to 50 percent by weight, based on the block copolymer, of the monovinyl-aromatic or monovinylidene-aromatic compound as copolymerized units.
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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) | 1981-05-15 | 1981-11-14 | 1982-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-15 | 1985-11-14 | 1986-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-15 | 1989-11-14 | 1990-05-16 | $7700.00 | Window Closed / Lapsed |