US4175161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving the adhesion of a heat activatable polyurethane adhesive to a vinyl substrate
Assignee: US PLYWOOD Corp A CORP OF
•
Filing: 1978-04-27
•
Granted: 1979-11-20
•
Expires: 1998-04-27
Abstract
Abstract The adhesion of a heat activatable polyurethane adhesive to a vinyl substrate is improved by admixing the adhesive with an N-substituted-2-pyrrolidone and/or an ethoxylated alkyl phenol.
Inventors
- 👤 Ozzie Fogle
- 👤 James Cooley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:36
CPC Classifications
C; C09; C09J; C09J175/00; C09J175/04; C08; C08K; C08K5/00; C08K5/04; C08K5/06; C08K5/16; C08K5/34; C08L; C08L2666/00; C08L2666/28; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31573; Y10T428/31855
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
71 words
A method of improving the adhesion of a heat activatable polyurethane adhesive to a vinyl substrate comprising admixing said heat activatable polyurethane adhesive with at least one agent selected from the groups consisting of N-substituted-2-pyrrolidone and ethoxylated alkyl phenol, wherein said N-substituted-2-pyrrolidone substituent is lower alkyl or lower alkenyl, applying said admixture to a vinyl substrate, and thereafter reacting an organic isocyanate with the additive in said heat activatable polyurethane adhesive.
Claim 2
Independent Claim
71 words
A method of improving the adhesion of a heat activatable polyurethane adhesive to a vinyl substrate comprising admixing said heat activatable polyurethane adhesive with at least one agent selected from the groups consisting of N-substituted-2-pyrrolidone and ethoxylated alkyl phenol, wherein said N-substituted-2-pyrrolidone substituent is lower alkyl or lower alkenyl, applying said admixture to a vinyl substrate, and thereafter reacting an organic isocyanate with the additive in said heat activatable polyurethane adhesive.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein said pyrrolidone is employed in an amount of about 1-15% by volume.
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein said amount is about 3-10% by volume.
Claim 5
Dependent Claim
20 words
The method of claim 1 wherein said ethoxylated alkyl phenol is used in an amount of about 1-15% by weight.
Claim 6
Dependent Claim
13 words
The method of claim 4 wherein said amount is about 4-10% by weight.
Claim 7
Dependent Claim
13 words
The method of claim 1 wherein said organic isocyanate is polymethylene polyphenyl isocyanate.
Claim 8
Dependent Claim
28 words
The method of claim 6 wherein said isocyanate is used in an amount of about 1-4% by weight based on the weight of the heat activatable polyurethane adhesive.
Claim 9
Dependent Claim
10 words
The method of claim 1 wherein said agent is N-methyl-2-pyrrolidone.
Claim 10
Dependent Claim
10 words
The method of claim 1 wherein said agent is N-vinyl-2-pyrrolidone.
Claim 11
Dependent Claim
9 words
A laminate produced by the method of claim 1.
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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) | 1982-11-19 | 1983-05-21 | 1983-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-19 | 1987-05-21 | 1987-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-19 | 1991-05-21 | 1991-11-20 | $7700.00 | Window Closed / Lapsed |