Patent US3917607A successfully refreshed from Google Patents.
US3917607A
Expired / Lapsed
US
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Block copolymer adhesive compositions
Assignee: Shell USA Inc
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Filing: 1973-11-23
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Granted: 1975-11-04
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Expires: 1993-11-23
Abstract
Abstract Stable adhesive compositions are provided comprising blends of certain partially hydrogenated block copolymers, a tackifying resin compatible with one of the polymer blocks, and a high melting point resin compatible with another type of the polymer blocks. Waxes, extending oils and solvents may be present as well.
Inventors
- 👤 Ronald K Crossland
- 👤 Jr James T Harlan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:36
CPC Classifications
C; C09; C09J; C09J191/00; C09J191/06; C09J191/08; C09J109/00; C09J153/00; C09J153/02; C09J153/025; C08; C08L; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
217 words
AN ADHESIVE COMPOSITION COMPRISING: A. 100 PARTS BY WEIGHT OF A BLOCK COPOLYMER HAVING AT LEAST TWO POLYMER BLOCKS A AND AT LEAST ONE POLYMER BLOCK B, EACH BLOCK A BEING A NON-ELASTOMERIC POLYMER BLOCK OF A MOMOALKENYL ARENE HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN ABOUT 2,000 AND ABOUT 125,000 AND EACH BLOCK B BEING AN ELASTOMERIC HYDROGENATED POLYMER BLOCK OF A CONJUGATED DIENE, HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN ABOUT 10,000 AND ABOUT 250,000, B. 25-300 PARTS BY WEIGHT OF A TACKIFYING RESIN BEING COMPATIBLE PREDOMINANTLY WITH BLOCK B AND SUBSTANTIALLY INCOMPATIBLE WITH BLOCK A OF THE BLOCK COPOLYMER AND SELECTED FROM THE GROUP CONSISTING OF COPOLYMERS OF 40-80 WT. % 1,3-PENTADIENE AND 60-20 WT. % 2-METHYL-2BUTENE, POLYHYDRIC ESTERS OF RESIN, POLYHYDRIC ESTERS OF HYDROGENATED RESIN, ALPHAPINENE RESINS, BETA-PINENE RESINS OLEFINIC RESINS AND SYNTHETIC POLYTERPENES, C. 10-200 PARTS BY WEIGHT OF A PREDOMINANTLY AROMATIC SECOND RESIN HAVING A SOFTENING POINT ABOVE ABOUT 100*C, SAID SECOND RRESIN BEING COMPATIBLE PREDOMINANTLY WITH BLOCK A AND SUBSTANTIALLY INCOMPATIBLE WITH BLOCK B OF THE BLOCK COPOLYMER AND SELECTED FROM THE GROUP CONSISTING OF COUMARONE-INDENE RESINS, VINYL TOLUENE-ALPHA METHYL STYRENE COPOLYMERS, ALPHA METHYL STYRENE HOMOPOLYMERS, POLYINDENE RESINS AND POLYSTYRENE RESINS, AND D. 0-200 PARTS BY WEIGHT OF EXTENDING OIL SAID OIL BEING PREDOMINANTLY COMPATIBLE WITH BLOCK B OF THE BLOCK COPOLYMER.
Claim 2
Dependent Claim
217 words
AN ADHESIVE COMPOSITION COMPRISING: A. 100 PARTS BY WEIGHT OF A BLOCK COPOLYMER HAVING AT LEAST TWO POLYMER BLOCKS A AND AT LEAST ONE POLYMER BLOCK B, EACH BLOCK A BEING A NON-ELASTOMERIC POLYMER BLOCK OF A MOMOALKENYL ARENE HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN ABOUT 2,000 AND ABOUT 125,000 AND EACH BLOCK B BEING AN ELASTOMERIC HYDROGENATED POLYMER BLOCK OF A CONJUGATED DIENE, HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN ABOUT 10,000 AND ABOUT 250,000, B. 25-300 PARTS BY WEIGHT OF A TACKIFYING RESIN BEING COMPATIBLE PREDOMINANTLY WITH BLOCK B AND SUBSTANTIALLY INCOMPATIBLE WITH BLOCK A OF THE BLOCK COPOLYMER AND SELECTED FROM THE GROUP CONSISTING OF COPOLYMERS OF 40-80 WT. % 1,3-PENTADIENE AND 60-20 WT. % 2-METHYL-2BUTENE, POLYHYDRIC ESTERS OF RESIN, POLYHYDRIC ESTERS OF HYDROGENATED RESIN, ALPHAPINENE RESINS, BETA-PINENE RESINS OLEFINIC RESINS AND SYNTHETIC POLYTERPENES, C. 10-200 PARTS BY WEIGHT OF A PREDOMINANTLY AROMATIC SECOND RESIN HAVING A SOFTENING POINT ABOVE ABOUT 100*C, SAID SECOND RRESIN BEING COMPATIBLE PREDOMINANTLY WITH BLOCK A AND SUBSTANTIALLY INCOMPATIBLE WITH BLOCK B OF THE BLOCK COPOLYMER AND SELECTED FROM THE GROUP CONSISTING OF COUMARONE-INDENE RESINS, VINYL TOLUENE-ALPHA METHYL STYRENE COPOLYMERS, ALPHA METHYL STYRENE HOMOPOLYMERS, POLYINDENE RESINS AND POLYSTYRENE RESINS, AND D. 0-200 PARTS BY WEIGHT OF EXTENDING OIL SAID OIL BEING PREDOMINANTLY COMPATIBLE WITH BLOCK B OF THE BLOCK COPOLYMER.
Claim 3
Dependent Claim
55 words
An adhesive composition according to claim 1 where: a. the block copolymer is polystyrene/hydrogenated polybutadiene/polystyrene; b. the tackifying resin is a copolymer of 40-80 wt. % 1,3-pentadiene and 60-20 wt. % a 2-methyl-2-butene; c. the second resin is a coumarone-indene resin having a softening point of 155*C; d. the extending oil is a polypropylene oligomer.
Claim 4
Dependent Claim
36 words
A pressure sensitive adhesive composition according to claim 1 wherein; component (b) is present in the range of 50-200 parts by weight, and component (c) is present in the range of 10- 150 parts by weight.
Claim 5
Dependent Claim
18 words
A hot melt adhesive composition according to claim 1 containing 25- 900 parts by weight of petroleum wax.
Claim 6
Dependent Claim
42 words
A hot melt adhesive composition according to claim 4 wherein the tackifying resin has a softening point between 80*C and 110*C and is a copolymer comprising 40-80 wt % units derived from 1,3 pentadiene and 60-20 wt % units derived from 2-methyl-2-butene.
Claim 7
Dependent Claim
26 words
A composition according to claim 4 wherein wax comprises 1-3 parts by weight of a paraffin wax and 1-3 parts by weight of a microcrystalline wax.
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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |