EP0308115A2
Expired / Lapsed
EP
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Process for the preparation of aqueous polymer dispersions
Assignee: DSM IP Assets BV
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Filing: 1988-09-05
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Granted: —
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Expires: 2008-09-05
Abstract
Abstract A surfactant-free aqueous polymer dispersion containing an anionic water-dispersible polyurethane and a vinyl polymer in a weight ratio of from 10:90 to 90:10, said dispersion having been obtained by: (A) forming a solution of an anionic water-dispersible isocyanate-terminated polyurethane in at least one vinyl monomer; (B) dispersing the solution in an aqueous medium; (C) chain extending the polyurethane, and either (D) adding further vinyl monomer, and (E) initiating polymerisation of the vinyl monomer, or (F) initiating polymerisation of the vinyl monomer, and (G) adding further vinyl monomer during polymerisation.
Inventors
- 👤 Hendricus Cornelis Goos
- 👤 Gerardus Cornelis Overbeek
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 17:41
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0819; C08F; C08F283/00; C08F283/006; C09; C09D; C09D175/00; C09D175/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
90 words
1 A surfactant-free aqueous polymer dispersion containing an anionic water-dispersible polyurethane and a vinyl polymer in a weight ratio of from 10:90 to 90:10, said dispersion having been obtained by: (A) forming a solution of an anionic water-dispersible isocyanate-terminated polyurethane in at least one vinyl monomer; (B) dispersing the solution in an aqueous medium; (C) chain extending the polyurethane, and either (D) adding further vinyl monomer, and (E) initiating polymerisation of the vinyl monomer, or (F) initiating polymerisation of the vinyl monomer, and (G) adding further vinyl monomer during polymerisation.
Claim 2
Dependent Claim
90 words
1 A surfactant-free aqueous polymer dispersion containing an anionic water-dispersible polyurethane and a vinyl polymer in a weight ratio of from 10:90 to 90:10, said dispersion having been obtained by: (A) forming a solution of an anionic water-dispersible isocyanate-terminated polyurethane in at least one vinyl monomer; (B) dispersing the solution in an aqueous medium; (C) chain extending the polyurethane, and either (D) adding further vinyl monomer, and (E) initiating polymerisation of the vinyl monomer, or (F) initiating polymerisation of the vinyl monomer, and (G) adding further vinyl monomer during polymerisation.
Claim 3
Dependent Claim
24 words
2 A dispersion according to claim 1 containing the water-dispersible polyurethane and the vinyl polymer in a weight ratio of from 20:80 to 80:20.
Claim 4
Dependent Claim
77 words
3 A dispersion according to claim 1 or claim 2 wherein the anionic water-dispersible isocyanate-terminated polyurethane is a reaction product of: (i) an organic polyisocyanate; (ii) a polymeric polyol having a molecular weight of from 500 to 6000; (iii) an isocyanate-reactive compound having at least one acid group and at least two groups that are more reactive than the acid group towards isocyanates, and, optionally (iv) a low molecular weight polyol having a molecular weight below 500.
Claim 5
Dependent Claim
26 words
4 A dispersion according to any preceding claim wherein the isocyanate-reactive compound having at least one acid group is a carboxy group containing diol or triol.
Claim 6
Dependent Claim
29 words
5 A dispersion according to claim 4 wherein the carboxy group containing diol or triol is a dihydroxy alkanoic acid of the formula: wherein R is hydrogen or alkyl.
Claim 7
Dependent Claim
11 words
6 A dispersion according to claim 5 wherein R is methyl.
Claim 8
Dependent Claim
34 words
7 A dispersion according to any preceding claim wherein the vinyl monomer is selected from methyl methacrylate, butyl acrylate, butyl methacrylate, acrylonitrile, allyl methacylate, styrene and mixtures of two or more of said mononers.
Claim 9
Dependent Claim
34 words
8 A dispersion according to any preceding claim wherein the proportion of monomer used as solvent for the isocyanate-terminated polyurethane in step A is from 1.5 to 95% by weight of the total monomers.
Claim 10
Dependent Claim
26 words
9 A dispersion according to claim 8 wherein the proportion of monomer used as solvent is from 2.5 to 80% by weight of the total monomers.
Claim 11
Dependent Claim
27 words
10 A dispersion according to claim 9 wherein the proportion of monomer used as solvent is from 7 to to 50% by weight of the total monomers.
Claim 12
Dependent Claim
18 words
11 A coating or film derived from a dispersion as claimed in any of claims 1 to 10.
Claim 13
Dependent Claim
17 words
12 A composite article which includes a film as claimed in claim 11 as an adhesive layer.
References Cited (Backward Citations)
No citation records indexed.
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