US4644030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous polyurethane - polyolefin compositions
Assignee: Witco Corp
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Filing: 1985-02-01
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Granted: 1987-02-17
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Expires: 2005-02-01
Abstract
Abstract Method of making a stable aqueous dispersion of polymeric material comprising: (A) producing an NCO-terminated polyurethane prepolymer in the presence of inert liquid polymerizable ethylenically unsaturated monomer material, (B) dispersing the product from A in water, (C) chain-extending the prepolymer in the resulting aqueous dispersion, and (D) subjecting the aqueous dispersion from C to vinyl addition polymerization conditions to polymerize said monomer material in situ, the weight ratio of chain extended polyurethane to said monomer material being about 9:1 to about 1:9., the resulting aqueous dispersions, and their use for making films, sheets and other products.
Inventors
- 👤 Peter Loewrigkeit
- 👤 Kenneth A. Van Dyk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:27
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0838; C08G18/0842; C08G18/0861; C08G18/0866; C08F; C08F283/00; C08F283/006; C08F283/008; C08F290/00; C08F290/08; C08F290/14; C08F290/147; C08G18/0804; C08G18/0819; C08G18/0823; C08G18/28; C08G18/67
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
89 words
A method of preparing a stable aqueous dispersion of polymeric material comprising: (A) producing an NCO-terminated polyurethane prepolymer in admixture with inert liquid polymerizable ethylenically unsaturated monomer material, (B) dispersing the product from A in water, (C) chain-extending to fully react the prepolymer in the resulting aqueous dispersion from B, and (D) subjecting the aqueous dispersion from C to vinyl addition polymerization conditions to polymerize said monomer material in situ, the weight ratio of fully reacted chain extended polyurethane to said monomer material being about 9:1 to about 1:9.
Claim 2
Independent Claim
89 words
A method of preparing a stable aqueous dispersion of polymeric material comprising: (A) producing an NCO-terminated polyurethane prepolymer in admixture with inert liquid polymerizable ethylenically unsaturated monomer material, (B) dispersing the product from A in water, (C) chain-extending to fully react the prepolymer in the resulting aqueous dispersion from B, and (D) subjecting the aqueous dispersion from C to vinyl addition polymerization conditions to polymerize said monomer material in situ, the weight ratio of fully reacted chain extended polyurethane to said monomer material being about 9:1 to about 1:9.
Claim 3
Dependent Claim
16 words
A method according to claim 1 wherein said weight ratio is about 6:1 to about 1:1.
Claim 4
Dependent Claim
19 words
A method according to claim 1 wherein said prepolymer contains an effective water-dispersing amount of pendant carboxylic salt groups.
Claim 5
Dependent Claim
19 words
A method according to claim 1 wherein said prepolymer contains an effective water-dispersing amount of pendant cationic salt groups.
Claim 6
Dependent Claim
17 words
A method according to claim 1 wherein said chain extended polyurethane contains terminal N-methylol hydrazide end caps.
Claim 7
Dependent Claim
13 words
A method according to claim 1 wherein said prepolymer contains ethylenically unsaturated groups.
Claim 8
Dependent Claim
21 words
A method according to claim 1 wherein about 1 to less than 50 wt. % of said monomer material is polyunsaturated.
Claim 9
Dependent Claim
29 words
A method according to claim 1 wherein said monomer material comprises at least one member of the group consisting of ethylenically unsaturated hydrocarbons, carboxylic acids, and esters, and ethers.
Claim 10
Dependent Claim
38 words
A method according to claim 1 wherein said monomer material comprises at least one member of the group consisting of the free acids and esters of acrylic and methacrylic acid, esters and ethers of vinyl alcohol, and styrene.
Claim 11
Dependent Claim
12 words
A stable aqueous dispersion produced by a method according to claim 1.
Claim 12
Dependent Claim
12 words
A stable aqueous dispersion produced by a method according to claim 2.
Claim 13
Dependent Claim
12 words
A stable aqueous dispersion produced by a method according to claim 3.
Claim 14
Dependent Claim
12 words
A stable aqueous dispersion produced by a method according to claim 4.
Claim 15
Dependent Claim
12 words
A stable aqueous dispersion produced by a method according to claim 5.
Claim 16
Dependent Claim
12 words
A stable aqueous dispersion produced by a method according to claim 6.
Claim 17
Dependent Claim
12 words
A stable aqueous dispersion produced by a method according to claim 7.
Claim 18
Dependent Claim
12 words
A stable aqueous dispersion produced by a method according to claim 8.
Claim 19
Dependent Claim
12 words
A stable aqueous dispersion produced by a method according to claim 9.
Claim 20
Dependent Claim
12 words
A film deposited from a polymeric dispersion as defined in claim 10.
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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) | 1990-02-16 | 1990-08-18 | 1991-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-16 | 1994-08-18 | 1995-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-16 | 1998-08-18 | 1999-02-17 | $7700.00 | Window Closed / Lapsed |