US4243564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction products of a hydrolyzed styrene-maleic anhydride copolymer and a dispersed high amylopectin starch product neutralized with a volatile alkali, method of making same, and coating compositions comprising same
Assignee: Individual
•
Filing: 1979-05-18
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Granted: 1981-01-06
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Expires: 1999-05-18
Abstract
Abstract The volatile alkali salt of the reaction product of a waxy starch product having a high amylopectin content and styrene-maleic anhydride copolymer and the method of making such product comprising hydrolyzing the copolymer in the presence of the high amylopectin starch product at an elevated temperature and in the presence of water for a time sufficient to hydrolyze the copolymer, disperse the starch in water, and permit the copolymer and starch to react, adding a volatile alkali to the heated mixture, and continuing the heating for a time sufficient to form the volatile alkali salt of said reaction product. The invention also comprises coatings comprising the volatile alkali salt of said reaction product.
Inventors
- 👤 Robert C. Mavis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:32
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/56; D21H19/58; C; C08; C08B; C08B35/00; C08G; C08G81/00; C08G81/02; C09; C09D; C09D103/00; C09D103/14; D21H19/54; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31982
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
25 words
The volatile alkali salt of a reaction product in an aqueous medium of a hydrolyzed styrene-maleic anhydride copolymer and a dispersed high amylopectin starch product.
Claim 2
Dependent Claim
25 words
The volatile alkali salt of a reaction product in an aqueous medium of a hydrolyzed styrene-maleic anhydride copolymer and a dispersed high amylopectin starch product.
Claim 3
Dependent Claim
48 words
The product of claim 1 wherein the copolymer is prepared from a 3:1 ratio of styrene to maleic anhydride and having a molecular weight of 1900 and an acid number of 275 and the high amylopectin starch is selected from a waxy maize, waxy sorghum, or mixtures thereof.
Claim 4
Dependent Claim
25 words
The product of claim 1 or 2 wherein the volatile alkali is ammonium hydroxide and the product has a pH of at least about 8.5.
Claim 5
Independent Claim
59 words
The method of making a reaction product suitable for use in film-forming coating compositions comprising admixing a high amylopectin starch product and a styrene-maleic anhydride copolymer in water, heating at a temperature and for a time sufficient to hydrolyze the copolymer, disperse the starch, and form the reaction product, and thereafter neutralizing the reaction product with a volatile alkali.
Claim 6
Independent Claim
59 words
The method of making a reaction product suitable for use in film-forming coating compositions comprising admixing a high amylopectin starch product and a styrene-maleic anhydride copolymer in water, heating at a temperature and for a time sufficient to hydrolyze the copolymer, disperse the starch, and form the reaction product, and thereafter neutralizing the reaction product with a volatile alkali.
Claim 7
Dependent Claim
48 words
The method of claim 4 wherein the high amylopectin starch is selected from a waxy maize, waxy sorghum, or mixtures thereof and the copolymer is prepared from a 3:1 ratio of styrene to maleic anhydride and having a molecular weight of 1900 and an acid number of 275.
Claim 8
Dependent Claim
30 words
The method of claim 4 wherein the heating is conducted at a temperature of from about 160° to 175° F. for a period of from about 25 to 45 minutes.
Claim 9
Independent Claim
63 words
The method of making a product suitable for use in film-forming coating compositions comprising admixing a high amylopectin starch product with a styrene-maleic anyhdride copolymer in water at a temperature of from about 160° to 175° F. for a period of about 25 to 45 minutes and thereafter adding ammonium hydroxide in an amount sufficient to give a pH of at least 8.5.
Claim 10
Independent Claim
63 words
The method of making a product suitable for use in film-forming coating compositions comprising admixing a high amylopectin starch product with a styrene-maleic anyhdride copolymer in water at a temperature of from about 160° to 175° F. for a period of about 25 to 45 minutes and thereafter adding ammonium hydroxide in an amount sufficient to give a pH of at least 8.5.
Claim 11
Dependent Claim
13 words
A film-forming coating composition comprising the product of claims 1, 2, or 3.
Claim 12
Dependent Claim
20 words
The film-forming coating composition of claim 8 including at least one paper coating pigment and an elastomeric or resin latex.
Claim 13
Dependent Claim
15 words
A coated paper comprising a paper sheet coated with the film-forming composition of claim 8.
Claim 14
Dependent Claim
18 words
A paint comprising at least one paint pigment, a paint resin and the film-forming composition of claim 8.
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) | 1984-01-06 | 1984-07-07 | 1985-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-06 | 1988-07-07 | 1989-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-06 | 1992-07-07 | 1993-01-06 | $7700.00 | Window Closed / Lapsed |