US5115033A
Expired / Lapsed
US
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Coextrudable adhesives
Assignee: DuPont Canada Inc
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Filing: 1990-02-27
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Granted: 1992-05-19
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Expires: 2010-02-27
Abstract
Abstract A coextrudable adhesive composition formed from a polymer component and a catalytic agent is disclosed. The polymer component is selected from grafted polymers formed by grafting polyolefins with an ethylenically unsaturated carboxylic acid or anhydride. The catalytic agent is a monoalkyl phosphate, alkylamine, heterocyclic compound or aminocarboxylic acid. The compositions show improved adhesion to polar substrates compared with the related compositions that do not contain the catalytic agent. The compositions may be used, for example, in the bonding of ethylene/vinyl alcohol polymers to polyolefins and polyamides.
Inventors
- 👤 Chun S. Wong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:40
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/08; B; B32; B32B; B32B27/00; B32B27/32; C09J151/00; C09J151/06; C08; C08L; C08L2666/00; C08L2666/28; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
130 words
A coextrudable adhesive composition comprising: (a) an acid copolymer selected from the group consisting of polyolefins grafted with at least one of an ethylenically unsaturated carboxylic acid and an ethylenically unsaturated carboxylic acid anhydride, said grafted polyolefin containing a total amount of at least 0.001% by weight to 5% by weight of carboxylic acid and carboxylic acid anhydride groups; and (b) a catalytic amount up to 0.5% by weight of an agent selected from the group consisting of monoalkyl phosphates, dialkyl phosphates, monoalkylamines, dialkylamines, trialkylamines, heterocyclic amino compounds, aminocarboxylic acids and salts of such acids; the amines being monoamines; the heterocyclic amino compounds being selected from the group consisting of benzimidazole, histidine, quinoline and piperazine; and the aminocarboxylic acids being selected from the group consisting of glycine, arginine and lysine.
Claim 2
Dependent Claim
130 words
A coextrudable adhesive composition comprising: (a) an acid copolymer selected from the group consisting of polyolefins grafted with at least one of an ethylenically unsaturated carboxylic acid and an ethylenically unsaturated carboxylic acid anhydride, said grafted polyolefin containing a total amount of at least 0.001% by weight to 5% by weight of carboxylic acid and carboxylic acid anhydride groups; and (b) a catalytic amount up to 0.5% by weight of an agent selected from the group consisting of monoalkyl phosphates, dialkyl phosphates, monoalkylamines, dialkylamines, trialkylamines, heterocyclic amino compounds, aminocarboxylic acids and salts of such acids; the amines being monoamines; the heterocyclic amino compounds being selected from the group consisting of benzimidazole, histidine, quinoline and piperazine; and the aminocarboxylic acids being selected from the group consisting of glycine, arginine and lysine.
Claim 3
Dependent Claim
35 words
The coextrudable adhesive composition of claim 1 in which the polyolefin that is grafted is selected from the group consisting of homopolymers and copolymers of hydrocarbon alpha-olefins having 2-8 carbon atoms and ethylene/vinyl alkanoate copolymers.
Claim 4
Dependent Claim
16 words
The coextrudable adhesive composition of claim 2 in which the grafted polyolefin is a grafted polyethylene.
Claim 5
Dependent Claim
27 words
The coextrudable adhesive composition of claim 3 in which the ethylenically unsaturated carboxylic acid and ethylenically unsaturated carboxylic acid anhydride are maleic acid and maleic anhydride, respectively.
Claim 6
Dependent Claim
18 words
The coextrudable adhesive composition of claim 4 in which the agent is selected from histidine, quinoline and tributylamine.
Claim 7
Dependent Claim
29 words
The coextrudable adhesive composition of claim 4 in which the agent is selected from the group consisting of monoalkyl phosphates, dialkyl phosphates, monoalkylamines, dialkylamines, trialkylamines and heterocyclic amino compounds.
Claim 8
Dependent Claim
26 words
The coextrudable adhesive composition of claim 6 in which the grafted polyolefin contains 0.01 to 5% by weight of carboxylic acid and carboxylic acid anhydride groups.
Claim 9
Dependent Claim
26 words
The coextrudable adhesive composition of claim 5 in which the grafted polyolefin contains 0.05 to 2% by weight of carboxylic acid and carboxylic acid anhydride groups.
Claim 10
Dependent Claim
19 words
The coextrudable adhesive composition of claim 6 in which the composition contains 0.001 to 0.5% by weight of agent.
Claim 11
Dependent Claim
19 words
The coextrudable adhesive composition of claim 5 in which the composition contains 0.003 to 0.05% by weight of agent.
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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) | 1995-05-19 | 1995-11-18 | 1996-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-19 | 1999-11-18 | 2000-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-19 | 2003-11-18 | 2004-05-19 | $7700.00 | Window Closed / Lapsed |