US4675210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Maleic modified butene copolymers for adhering polypropylene
Assignee: Hercules LLC
•
Filing: 1986-02-20
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Granted: 1987-06-23
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Expires: 2006-02-20
Abstract
Abstract Graft copolymers are disclosed wherein maleic acid or maleic anhydride is grafted to a poly(propylene--butene) backbone. The grafts are useful materials for adhering polypropylene to other materials.
Inventors
- 👤 Anthony B. Clayton
- 👤 Brian D. Kramer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:37
CPC Classifications
C; C09; C09J; C09J151/00; C09J151/06; C08; C08F; C08F255/00; C08F255/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
95 words
A method of applying a layer of polypropylene to a polar substrate which comprises applying said layer in the presence of a crystalline copolymer comprised of about 1 to 50% by weight of butene-1 and about 99 to 50% by weight of propylene, said copolymer having about 0.5 to 5% by weight of maleic acid or maleic anhydride, based on the weight of said copolymer, chemically combined therewith, whereby the said modified copolymer is in contact with both the layer of polypropylene and the polar substrate to effect bonding between the polypropylene and the substrate.
Claim 2
Independent Claim
95 words
A method of applying a layer of polypropylene to a polar substrate which comprises applying said layer in the presence of a crystalline copolymer comprised of about 1 to 50% by weight of butene-1 and about 99 to 50% by weight of propylene, said copolymer having about 0.5 to 5% by weight of maleic acid or maleic anhydride, based on the weight of said copolymer, chemically combined therewith, whereby the said modified copolymer is in contact with both the layer of polypropylene and the polar substrate to effect bonding between the polypropylene and the substrate.
Claim 3
Independent Claim
85 words
A method of adhering polypropylene to a polar material which comprises applying said polypropylene in the presence of a crystalline copolymer comprised of about 1 to 50% by weight of butene 1 and about 99 to 50% by weight of propylene, said copolymer having about 0.5 to 5% by weight of maleic acid or maleic anhydride, based on the weight of said copolymer, chemically combined therewith, whereby the said modified copolymer is in contact with both the polypropylene and the polar material to effect bonding.
Claim 4
Independent Claim
85 words
A method of adhering polypropylene to a polar material which comprises applying said polypropylene in the presence of a crystalline copolymer comprised of about 1 to 50% by weight of butene 1 and about 99 to 50% by weight of propylene, said copolymer having about 0.5 to 5% by weight of maleic acid or maleic anhydride, based on the weight of said copolymer, chemically combined therewith, whereby the said modified copolymer is in contact with both the polypropylene and the polar material to effect bonding.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein the polar substrate is a metal.
Claim 6
Dependent Claim
13 words
The method of claim 1 wherein the polar substrate is a polar polymer.
Claim 7
Dependent Claim
23 words
The method of claim 1 wherein the modified copolymer is blended into the polypropylene prior to applying said polypropylene to the polar substrate.
Claim 8
Dependent Claim
28 words
The method of claim 5 wherein the polar substrate is a film-forming polar polymer and contacting of the polar polymer and the polypropylene layer is effected via coextrusion.
Claim 9
Dependent Claim
43 words
The method of claim 1 wherein the polar substrate is a polar polymer and contacting of the layers with the modified copolymer is effected by coextruding a layer of said copolymer between a layer of polypropylene and a layer of the polar polymer.
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US3617351A
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US3919196A
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US3932368A
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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) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |