US4060664A
Expired / Lapsed
US
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Bonded composite structures
Assignee: 3M Co
•
Filing: 1975-12-08
•
Granted: 1977-11-29
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Expires: 1995-12-08
Abstract
Abstract Bonded composite structures having improved bonding materials comprising a thin zone of polycarbodiimide polymer. Methods of preparing the bonded structures are described.
Inventors
- 👤 Thomas M. McGuire
- 👤 Kenneth Peacock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:03
CPC Classifications
C; C09; C09J; C09J179/00; C08; C08G; C08G18/00; C08G18/02; C08G18/025; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/269; Y10T428/28; Y10T428/2848; Y10T428/2852; Y10T428/2896; Y10T428/31504; Y10T428/31721; Y10T428/31786
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
86 words
A bonded, composite structure comprising at least one polymeric substrate selected from the group consisting of polyester polymers and polyolefin polymers, said substrate having a solid material adhered thereto by an interposed bonding material which is a thin polymer zone having a thickness of up to about 500 Angstroms and consisting essentially of an organic polycarbodiimide polymer containing at least two carbodiimide groups, each linked directly to an aromatic nucleus through a carbodiimide nitrogen, said polycarbodiimide polymer containing about 1 to 35 weight percent carbodiimide groups.
Claim 2
Dependent Claim
86 words
A bonded, composite structure comprising at least one polymeric substrate selected from the group consisting of polyester polymers and polyolefin polymers, said substrate having a solid material adhered thereto by an interposed bonding material which is a thin polymer zone having a thickness of up to about 500 Angstroms and consisting essentially of an organic polycarbodiimide polymer containing at least two carbodiimide groups, each linked directly to an aromatic nucleus through a carbodiimide nitrogen, said polycarbodiimide polymer containing about 1 to 35 weight percent carbodiimide groups.
Claim 3
Dependent Claim
21 words
A composite structure according to claim 1 wherein said polycarbodiimide polymer is free of substituents which will react with isocyanate groups.
Claim 4
Dependent Claim
16 words
A composite structure according to claim 1 wherein said polycarbodiimide polymer is a phenyl end-capped polymer.
Claim 5
Dependent Claim
15 words
A composite structure according to claim 1 wherein said solid material is an adhesive material.
Claim 6
Dependent Claim
25 words
A composite structure according to claim 4 wherein said adhesive material is a pressure-sensitive adhesive and wherein said polyester polymer is a poly(ethylene terephthalate) polymer.
Claim 7
Dependent Claim
15 words
A composite structure according to claim 5 wherein said pressure-sensitive adhesive is an acrylate adhesive.
Claim 8
Dependent Claim
17 words
A composite structure according to claim 6 wherein said acrylate adhesive is an isooctyl acrylate/acrylic acid adhesive.
Claim 9
Dependent Claim
18 words
A composite structure according to claim 4 wherein said adhesive material is a pressure-sensitive styrene/butadiene block copolymer adhesive.
Claim 10
Dependent Claim
15 words
A composite structure according to claim 4 wherein said adhesive material is a thermoplastic adhesive.
Claim 11
Dependent Claim
17 words
A composite structure according to claim 4 wherein said adhesive material is a water-based phenolic thermoset resin.
Claim 12
Dependent Claim
17 words
A composite structure according to claim 1 wherein said substrate is a corona treated polyolefin polymer substrate.
Claim 13
Dependent Claim
33 words
A composite structure according to claim 3 wherein said substrate is a flexible polyester sheet having on one major surface thereof an adhered solid material which is an isooctyl acrylate/acrylic acid pressure-sensitive adhesive.
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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) | 1980-11-28 | 1981-05-30 | 1981-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-28 | 1985-05-30 | 1985-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-28 | 1989-05-30 | 1989-11-29 | $7700.00 | Window Closed / Lapsed |