US4404332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross-linking agents for cationic polymers
Assignee: Wyeth Holdings LLC
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Filing: 1982-10-26
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Granted: 1983-09-13
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Expires: 2002-10-26
Abstract
Abstract Amino-formaldehyde products with activated carboxylic ester groups cross-link compounds containing pendant primary or secondary amine groups. This is a continuation, of application Ser. No. 232,455, filed Feb. 9, 1981, which is a continuation of Ser. No. 128,613, filed 3/10/80, which is a division of Ser. No. 32,982, filed 4/25/79, which is a continuation-in-part of Ser. No. 926,762, filed 7/21/78, all now abandoned.
Inventors
- 👤 Girish G. Parekh
- 👤 Werner J. Blank
- 👤 Peter J. Schirmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:15
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K5/0025; C08G; C08G12/00; C08G12/02; C08G12/40; C08G12/42; C08G12/44; C09; C09D; C09D201/00; C09D201/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31688; Y10T428/31942
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
47 words
A composition of matter comprising (A) a compound having an average of at least two primary or secondary amine groups per molecule, and (B) a melamine compound, the amine groups of which contain as substituents an average of at least two glyoxylic acid ester groups per molecule.
Claim 2
Dependent Claim
47 words
A composition of matter comprising (A) a compound having an average of at least two primary or secondary amine groups per molecule, and (B) a melamine compound, the amine groups of which contain as substituents an average of at least two glyoxylic acid ester groups per molecule.
Claim 3
Dependent Claim
16 words
A composition according to claim 1 wherein the melamine compound is methyl melamine glycolate methyl ether.
Claim 4
Dependent Claim
34 words
A composition according to claim 1 wherein (B) is reactive with the amine groups of (A), and the ratio of ester groups of (B) to amine groups of (A) is from 0.3/1 to 3/1.
Claim 5
Dependent Claim
13 words
A composition according to claim 1 wherein the compound (A) is a polymer.
Claim 6
Dependent Claim
11 words
A composition according to claim 4 wherein the polymer is cationic.
Claim 7
Dependent Claim
17 words
A coating formed on a substrate by curing thereon a film of said composition 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) | 1986-09-12 | 1987-03-14 | 1987-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-12 | 1991-03-14 | 1991-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-12 | 1995-03-14 | 1995-09-13 | $7700.00 | Window Closed / Lapsed |