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US4544609A
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Compounds and their use as insolubilizers for binders for paper coating compositions
Assignee: Sequa Chemicals Inc
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Filing: 1984-09-12
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Granted: 1985-10-01
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Expires: 2004-09-12
Abstract
Abstract Paper coating compositions contain at least one pigment, at least one binder, and, as an insolubilizer for the binder, the product of the reaction of a low molecular weight polyacrylamide with glyoxal and a urea or a cyclic urea.
Inventors
- 👤 Sai H. Hui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:20
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/56; D21H19/58; C; C08; C08F; C08F8/00; C08F8/30; D21H19/50; D21H19/54; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
97 words
An insolubilizer for binders for paper coating compositions which comprises the product of the reaction of (a) about 1.65 to 12,000 parts by weight of a polyacrylamide, (b) about 1.35 to 500 parts by weight of glyoxal, and (c) about 1 to 250 parts by weight of a urea or a cyclic urea, the reaction being carried out at a temperature within the range of about 25° to 100° C. and the binder being selected from the group consisting of starch; oxidized starch; enzyme-converted starch; starches having hydroxyl, carboxyl, amido, or amino groups; proteins; and their mixtures.
Claim 2
Dependent Claim
97 words
An insolubilizer for binders for paper coating compositions which comprises the product of the reaction of (a) about 1.65 to 12,000 parts by weight of a polyacrylamide, (b) about 1.35 to 500 parts by weight of glyoxal, and (c) about 1 to 250 parts by weight of a urea or a cyclic urea, the reaction being carried out at a temperature within the range of about 25° to 100° C. and the binder being selected from the group consisting of starch; oxidized starch; enzyme-converted starch; starches having hydroxyl, carboxyl, amido, or amino groups; proteins; and their mixtures.
Claim 3
Dependent Claim
47 words
A paper coating composition comprising a pigment, a binder, and as an insolubilizer for the binder the product of claim 1, said binder being selected from the group consisting of starch; oxidized starch; enzyme-converted starch; starches having hydroxyl, carboxyl, amido, or amino groups; proteins; nd their mixtures.
Claim 4
Dependent Claim
61 words
A process for insolubilizing the binder in a paper coating composition which comprises including in the composition about 2 to 10 percent of the insolubilizer of claim 1, based on the weight of the binder, said binder being selected from the group consisting of starch; oxidized starch; enzyme-converted starch; starches having hydroxyl, carboxyl, amido, or amino groups; proteins; and their mixtures.
Claim 5
Dependent Claim
60 words
The product of the reaction of (a) about 1.65 to 12,000 parts by weight of a polyacrylamide, (b) about 1.35 to 500 parts by weight of glyoxal, and (c) about 1 to 250 parts by weight of a urea or a cyclic urea, the reaction being carried out at a temperature within the range of about 25° to 100° C.
Claim 6
Dependent Claim
60 words
The product of the reaction of (a) about 1.65 to 12,000 parts by weight of a polyacrylamide, (b) about 1.35 to 500 parts by weight of glyoxal, and (c) about 1 to 250 parts by weight of a urea or a cyclic urea, the reaction being carried out at a temperature within the range of about 25° to 100° C.
Claim 7
Dependent Claim
23 words
The process of claim 3 wherein the amount of insolubilizer is about 3 to 7 percent, based on the weight of the binder.
Claim 8
Dependent Claim
10 words
A cellulose substrate coated with the composition of claim 2.
Claim 9
Dependent Claim
18 words
The product of claim 4 wherein the ratio of amounts of (a);(b):(c) is about 10-90:20-80:40-150 parts by weight.
Claim 10
Dependent Claim
11 words
The product of claim 4 wherein reactant (c) is a urea.
Claim 11
Dependent Claim
12 words
The product of claim 4 wherein reactant (c) is a cyclic urea.
Claim 12
Dependent Claim
10 words
The product of claim 8 wherein reactant (c) is urea.
Claim 13
Dependent Claim
10 words
The product of claim 9 wherein reactant (c) is monourein.
Claim 14
Dependent Claim
11 words
The product of claim 9 wherein reactant (c) is ethylene urea.
Claim 15
Dependent Claim
10 words
The product of claim 9 wherein reactant (c) is pyrimidone.
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) | 1988-09-30 | 1989-04-01 | 1989-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-30 | 1993-04-01 | 1993-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-30 | 1997-04-01 | 1997-10-01 | $7700.00 | Window Closed / Lapsed |