US3879238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal-polymer composites and methods for their preparation
Assignee: M&T Chemicals Inc
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Filing: 1973-12-14
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Granted: 1975-04-22
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Expires: 1993-12-14
Abstract
Abstract Strong durable bonds are formed between metals and vinyl chloride-containing polymers by maintaining at a surface of the metal a layer of polymer that contains pendant carboxylic acid GROUPS. One surface of the polymer layer has been modified by oxidation or chemical etching agents. Between the modified surface of the polymer layer and the vinyl chloride-containing polymer is an adhesive comprising a mixture of a natural or synthetic rubber and a phenolaldehyde resin. Heating the composite above 120*C. for a short period of time yields a unitary bonded structure.
Inventors
- 👤 Clarence R Bierman
- 👤 John D Welks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:18
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B7/00; B32B7/04; B32B7/12; C; C08; C08J; C08J5/00; C08J5/12; C08J5/124; C09; C09J; C09J161/00; C09J161/04; C09J161/06; B32B2310/00; B32B2310/14; B32B2311/00; B32B2311/16; B32B2311/22; B32B2311/24; B32B2311/30; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06; C08L; C08L2666/00; C08L2666/02; C08L2666/04; C08L7/00; C08L9/00; C08L9/02
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
16 words
A method for adhesively bonding a vinyl chloride-containing polymer to a metallic surface, said method comprising:
Claim 2
Independent Claim
16 words
A method for adhesively bonding a vinyl chloride-containing polymer to a metallic surface, said method comprising:
Claim 3
Dependent Claim
74 words
maintaining at the metallic surface a layer of polymer containing at least 3% by weight of repeating units derived from at least one ethylenically unsaturated carboxylic acid containing up to 12 carbon atoms, wherein the carboxylic acid residue is present as a pendant group, said layer having a lower surface which is in contact with said metallic surface and an upper surface which has been modified by treatment with an oxidizing or etching agent;
Claim 4
Dependent Claim
74 words
maintaining at the metallic surface a layer of polymer containing at least 3% by weight of repeating units derived from at least one ethylenically unsaturated carboxylic acid containing up to 12 carbon atoms, wherein the carboxylic acid residue is present as a pendant group, said layer having a lower surface which is in contact with said metallic surface and an upper surface which has been modified by treatment with an oxidizing or etching agent;
Claim 5
Independent Claim
16 words
A METHOD FOR ADHESIBELY BONDING A VINYK CHLORIDECONTAINING POLYMER TO A METALLIC SURFACE, SAID METHOD COMPRISING:
Claim 6
Independent Claim
16 words
A METHOD FOR ADHESIBELY BONDING A VINYK CHLORIDECONTAINING POLYMER TO A METALLIC SURFACE, SAID METHOD COMPRISING:
Claim 7
Dependent Claim
131 words
MAINTAINING AT THE METALLIC SURFACE A LAYER OF PLOYMER CONTAINING AT LEAST 3% BY WEIGHT OF REPEATING UNITS DERIVED FROM AT LEAST ONE ETHYLENCALLY UNSATURATED CARBOXYLIC ACID CONTAINING UP TO 12 CARBON ATOMS, WHEREIN THE CARBOXYLIC ACID RESIDUE IS PRESENT AS A PENDANT GROUP, SAID LAYER HAVING A LOWER SURFACE WHICH IS CONTACT WITH SAID METALLIC SURFACE AND AN UPPER SURFACE WHICH HAS BEEN MODIFIED BY TREATMENT WITH AN OXIDIZING OR ETCHING AGENT; 2. MAINTAINING AN ADHESIVE COMPOSITION AT THE INTERFACE BETWEEN THE MOSIFIED UPPER SURFACE OF SAID LAYER AND THE VINYL CHLORIDE-CONTAINING POLYMER, THE ADHESIVE COMPOSITION COMPRISING: A. BETWEEN 10 AND 50 PERCENT BY WEIGHT OF A SYNTHETIC RUBBER CONTAINING AT LEAST 20% BY WEIGHT OF ACRYLONITRILE; AND B. BETWEEN 50 AND 90% BY WEIGHT OF A CROSS-LINKABLE PHENOL-ALDEHYDE RESIN;
Claim 8
Dependent Claim
131 words
MAINTAINING AT THE METALLIC SURFACE A LAYER OF PLOYMER CONTAINING AT LEAST 3% BY WEIGHT OF REPEATING UNITS DERIVED FROM AT LEAST ONE ETHYLENCALLY UNSATURATED CARBOXYLIC ACID CONTAINING UP TO 12 CARBON ATOMS, WHEREIN THE CARBOXYLIC ACID RESIDUE IS PRESENT AS A PENDANT GROUP, SAID LAYER HAVING A LOWER SURFACE WHICH IS CONTACT WITH SAID METALLIC SURFACE AND AN UPPER SURFACE WHICH HAS BEEN MODIFIED BY TREATMENT WITH AN OXIDIZING OR ETCHING AGENT; 2. MAINTAINING AN ADHESIVE COMPOSITION AT THE INTERFACE BETWEEN THE MOSIFIED UPPER SURFACE OF SAID LAYER AND THE VINYL CHLORIDE-CONTAINING POLYMER, THE ADHESIVE COMPOSITION COMPRISING: A. BETWEEN 10 AND 50 PERCENT BY WEIGHT OF A SYNTHETIC RUBBER CONTAINING AT LEAST 20% BY WEIGHT OF ACRYLONITRILE; AND B. BETWEEN 50 AND 90% BY WEIGHT OF A CROSS-LINKABLE PHENOL-ALDEHYDE RESIN;
Claim 9
Dependent Claim
57 words
maintaining an adhesive composition at the interface between the modified upper surface of said layer and the vinyl chloride-containing polymer, the adhesive composition comprising: a. between 10 and 50 percent by weight of a synthetic rubber containing at least 20% by weight of acrylonitrile; and b. between 50 and 90% by weight of a cross-linkable phenol-aldehyde resin;
Claim 10
Dependent Claim
57 words
maintaining an adhesive composition at the interface between the modified upper surface of said layer and the vinyl chloride-containing polymer, the adhesive composition comprising: a. between 10 and 50 percent by weight of a synthetic rubber containing at least 20% by weight of acrylonitrile; and b. between 50 and 90% by weight of a cross-linkable phenol-aldehyde resin;
Claim 11
Dependent Claim
13 words
A method as described in claim 1 wherein the metallic surface is chromium.
Claim 12
Dependent Claim
15 words
A method as described in claim 1 wherein the ethylenically unsaturated acid is acrylic acid.
Claim 13
Dependent Claim
22 words
heating the resulting composite at a temperature above about 120*C. for a period of time sufficient to form a unitary bonded structure.
Claim 14
Dependent Claim
22 words
heating the resulting composite at a temperature above about 120*C. for a period of time sufficient to form a unitary bonded structure.
Claim 15
Dependent Claim
22 words
HEATING THE RESULTING COMPOSITE AT A TEMPERATURE ABOVE ABOUT 120*C, FOR A PERIOD OF TIME SUFFICIENT TO FORM A UNITARY BONDED STRUCTURE.
Claim 16
Dependent Claim
22 words
HEATING THE RESULTING COMPOSITE AT A TEMPERATURE ABOVE ABOUT 120*C, FOR A PERIOD OF TIME SUFFICIENT TO FORM A UNITARY BONDED STRUCTURE.
Claim 17
Dependent Claim
27 words
A method as described in claim 1 wherein the layer of polymer containing as ethylenically unsaturated acid has been modified by treatment with an electrical corona discharge.
Claim 18
Dependent Claim
21 words
A method as described in claim 1 wherein the phenol-aldehyde resin is a phenol-formaldehyde resin modified with an ethylenically unsaturated oil.
Claim 19
Dependent Claim
26 words
A method as described in claim 1 wherein the rubber is a butadiene-acrylontrile copolymer containing at least 20% by weight of repeating units derived from acrylonitrile.
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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |