US4138541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-curing copolymers containing both hydroxyamide functions and carboxy or anhydride functions, and compositions
Assignee: Rohm and Haas Co
•
Filing: 1976-08-09
•
Granted: 1979-02-06
•
Expires: 1996-08-09
Abstract
Abstract beta -Hydroxyalkylamide polymers are disclosed as self-curing by means of carboxy or anhydride functions in said polymers. The polymers are effective in solution, aqueous emulsion and powder coating formulations.
Inventors
- 👤 Harry J. Cenci
- 👤 Graham Swift
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:53
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/20; C08L; C08L33/00; C08L33/02; C08L35/00; C08L77/00; C08L77/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
43 words
A curable addition polymer containing (a) one or more carboxy groups, salts of said carboxy groups or carboxylic acid anhydride groups and (a) one or more pendant β-hydroxyalkyl amide groups of the formula: ##STR10## wherein R 3 is H or CH 3 .
Claim 2
Dependent Claim
43 words
A curable addition polymer containing (a) one or more carboxy groups, salts of said carboxy groups or carboxylic acid anhydride groups and (a) one or more pendant β-hydroxyalkyl amide groups of the formula: ##STR10## wherein R 3 is H or CH 3 .
Claim 3
Dependent Claim
93 words
The composition of claim 1 in which the carboxy, salt or anhydride groups are the residues of at least one ethylenically unsaturated acid monomer selected from acrylic, methacrylic, maleic, or itaconic acids and maleic anhydride, the acid monomer and hydroxyamide monomer each being used in the copolymer in the amount of 1% to 20% by weight of the monomers in the copolymer, and the ratio of hydroxyamide functional groups to salt, carboxy, or anhydride functional groups is between about 0.5 and about 2, wherein one anhydride group is equal to two carboxy functions.
Claim 4
Dependent Claim
25 words
The composition of claim 1 contained in water or an organic liquid selected from aromatic and aliphatic hydrocarbons, dimethyl formamide, ethers, ketones, esters, and alcohols.
Claim 5
Dependent Claim
30 words
The method of curing the composition of claim 1 comprising the step of heating it at a temperature of from 125° C. to 400° C. until the polymer is cured.
Claim 6
Dependent Claim
30 words
The method of curing the composition of claim 2 comprising the step of heating it at a temperature of from 125° C. to 400° C. until the polymer is cured.
Claim 7
Dependent Claim
30 words
The method of curing the composition of claim 3 comprising the step of heating it at a temperature of from 125° C. to 400° C. until the polymer is cured.
References Cited (Backward Citations)
GB1068037A
Cited
US3531525A
Cited
US3585172A
Cited
US3652501A
Cited
GB1309513A
Cited
US3714096A
Cited
US3947528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |