Patent US3819552A successfully refreshed from Google Patents.
US3819552A
Expired / Lapsed
US
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Adhesive composition
Assignee: International Synthetic Rubber Co Ltd
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Filing: 1972-10-20
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Granted: 1974-06-25
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Expires: 1992-10-20
Abstract
Abstract An adhesive composition comprises chlorobutyl rubber, an unsaturated ethylene-alpha olefin polymer of high molecular weight (as defined), carbon black, a liquid isobutene polymer, an ethylene alpha-olefin copolymer of low molecular weight (as defined), a tackifying resin and a sulphur vulcanisation system, each component being present in specified proportions. The adhesive composition is particularly useful in the preparation of an article of manufacture comprising at least two sheets of vulcanised EPDM rubber compositions, the edge portion of the sheets being adhered together at the interface by means of the adhesive composition which has been vulcanised after bringing said edges together.
Inventors
- 👤 L Glanville
- 👤 A Dunkley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:19
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C09J123/16; C09J123/26; C09J123/28; C09J123/283; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
24 words
An adhesive composition according to claim 1 wherein the unsaturated ethylene-propylene polymer is an ethylene-propylene terpolymer and component (D) is a saturated ethylene-propylene copolymer.
Claim 2
Dependent Claim
45 words
An adhesive composition according to claim 1 wherein the tackifying resin is selected from an alkyl phenol-formaldehyde resin, a hydrogenated wood rosin, a derivative of a hydrogenated wood rosin, a coumarone indene resin, a pentaerythritol resin derivative, a polyterpene resin or a terpene phenolic resin.
Claim 3
Dependent Claim
62 words
An adhesive composition according to claim 1 wherein the ethylene propylene copolymer in component A has an intrinsic viscosity measured as a 0.1 percent by weight solution in toluene at 20* of 1.4 to 2.5 and the ethylene-propylene copolymer of component D has an intrinsic viscosity measured as a 0.1 percent by weight solution in toluene at 20* of 0.1 to 1.0.
Claim 4
Dependent Claim
58 words
An adhesive composition according to claim 1 wherein component D is an ethylene-propylene copolymer prepared by intimately mixing a hydrocarbon solution of a normally solid ethylene-propylene polymer with a halide selected from the group consisting of aluminum tribromide and ball-milled aluminum trichloride and a cocatalysT for said halide and recovering the ethylene propylene polymer of lowered molecular weight.
Claim 5
Dependent Claim
35 words
An adhesive composition according to claim 1 wherein the sulphur vulcanisation ingredients employed enable the adhesive composition to be vulcanised at a temperature of at least 100*C. in a time of not over 1 minute.
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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |