EP0189945A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Aqueous polyurethane-polyolefin compositions
Assignee: Witco Corp
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Filing: 1986-02-03
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Granted: —
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Expires: 2006-02-03
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, andD) 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
EP
Data Source
google_patents
Last Synchronized
2026-11-02 20:46
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: 11
Claim 1
Independent Claim
83 words
A method of, preparing 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.
Claim 2
Independent Claim
83 words
A method of, preparing 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.
Claim 3
Dependent Claim
16 words
A method according to claim 1 wherein said weight ratio is about 6:1 to about 1:6.
Claim 4
Dependent Claim
25 words
A method according to claim 1 or 2 wherein said prepolymer contains an effective water-dispersing amount of carboxylic salt groups and/or of cationic salt groups.
Claim 5
Independent Claim
17 words
A method according to anyone of the preceding claims wherein said polyurethane contains N-methylol hydrazide end caps.
Claim 6
Independent Claim
16 words
A method according to anyone of the preceding claims wherein said prepolymer contains ethylenically unsaturated groups.
Claim 7
Independent Claim
24 words
A method according to anyone of the preceding claims wherein about 1 to less than 50 wt. % of said monomer material is polyunsaturated.
Claim 8
Independent Claim
32 words
A method according to anyone of the preceding claims wherein said monomer material comprises at least one member of the group consisting of ethylenically unsaturated hydrocarbons, carboxylic acids, and esters, and ethers.
Claim 9
Independent Claim
41 words
A method according to anyone of the preceding claims 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 10
Dependent Claim
15 words
A stable aqueous dispersion produced by a method according to anyone of the preceding claims.
Claim 11
Dependent Claim
26 words
A method comprising applying to a substrate a film-forming amount of an aqueous dispersion as defined in claim 10 and drying the film on the substrate.
References Cited (Backward Citations)
No citation records indexed.
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