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US4503207A
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US
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Process for the preparation of acrylamide graft polymer dispersions
Assignee: BASF Corp
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Filing: 1983-07-05
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Granted: 1985-03-05
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Expires: 2003-07-05
Abstract
Abstract Graft polymer dispersions are prepared by polymerizing aqueous solutions of acrylamide in unsaturation-containing polyols. These dispersions are employed in preparing polyurethane products.
Inventors
- 👤 Duane A. Heyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:48
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/63; C08G18/635; C08F; C08F291/00; C08F291/06; C08F291/08; Y; Y10; Y10S; Y10S524/00; Y10S524/923
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
45 words
A white, stable low viscosity graft polymer dispersion prepared by polymerizing, in the presence of an effective amount of a free radical initiator, in an unsaturation containing polyol or polyol mixture, an aqueous solution of acrylamide and removing the water during or after said polymerization.
Claim 2
Dependent Claim
45 words
A white, stable low viscosity graft polymer dispersion prepared by polymerizing, in the presence of an effective amount of a free radical initiator, in an unsaturation containing polyol or polyol mixture, an aqueous solution of acrylamide and removing the water during or after said polymerization.
Claim 3
Dependent Claim
28 words
The polymer dispersion of claim 1 wherein the amount of acrylamide is from 10 weight percent to 60 weight percent based on the total weight of the dispersion.
Claim 4
Dependent Claim
28 words
The polymer dispersion of claim 1 wherein the amount of acrylamide is from 20 weight percent to 40 weight percent based on the total weight of the dispersion.
Claim 5
Dependent Claim
50 words
A process for the preparation of a white stable low viscosity graft polymer dispersions comprising polymerizing in the presence of an effective amount of a free radical initiator in an unsaturation containing polyol or polyol mixture, an aqueous solution of acrylamide and removing the water during or after said polymerization.
Claim 6
Dependent Claim
50 words
A process for the preparation of a white stable low viscosity graft polymer dispersions comprising polymerizing in the presence of an effective amount of a free radical initiator in an unsaturation containing polyol or polyol mixture, an aqueous solution of acrylamide and removing the water during or after said polymerization.
Claim 7
Dependent Claim
27 words
The process of claim 4 wherein the amount of acrylamide is from 10 weight percent to 60 weight percent based on the total weight of the dispersion.
Claim 8
Dependent Claim
27 words
The process of claim 4 wherein the amount of acrylamide is from 20 weight percent to 40 weight percent based on the total weight of the dispersion.
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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) | 1988-03-04 | 1988-09-03 | 1989-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-04 | 1992-09-03 | 1993-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-04 | 1996-09-03 | 1997-03-05 | $7700.00 | Window Closed / Lapsed |