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Patent US4981885A successfully refreshed from Google Patents.
US4981885A
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US
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Polymer dispersions, process for their preparation, and their use as binders
Assignee: Solutia Germany GmbH and Co KG
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Filing: 1989-08-23
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Granted: 1991-01-01
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Expires: 2009-08-23
Abstract
Abstract Aqueous polymer dispersions based on (A) 1 to 99% by weight of a carboxy-functional polymer which additionally contains epoxy groups, (B) 1 to 99% by weight of a polymer obtained from at least one alpha , beta -olefinically unsaturated monomer, the polymer (B) having been prepared in the presence of polymer (A), (C) 0 to 20% by weight of anionic or non-ionic emulsifiers or a mixture of the two or protective colloids, the quantity data relating to the solids content of components (A) to (C), and if appropriate further conventional additives, the sum of all the components always being 100%. The invention also relates to a process for the preparation of such polymer dispersions, which are particularly suitable as a binder component in metallic basecoats or metal-free, (uni) basecoats and electrocoatings.
Inventors
- 👤 Dieter Engel
- 👤 Kurt Kraft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:02
CPC Classifications
C; C09; C09D; C09D151/00; C09D151/003; C08; C08F; C08F283/00; C08F283/10
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
99 words
An stable aqueous polymer dispersion comprising water and solids of the group consisting essentially of (A) 1 to 99% by weight of a carboxyfunctional polymer which additionally has an epoxy number of 0.2 to 4.0, (B) 1 to 99% by weight of a polymer obtained from at least one α,βolefinically unsaturated monomer, the polymer (B) having been prepared in the presence of polymer (A), (C) 0 to 20% by weight of anionic or non-ionic emulsifiers or a mixture of the two or protective colloids, and possible further conventional additives, the sum of all the solid components always being 100%.
Claim 2
Dependent Claim
99 words
An stable aqueous polymer dispersion comprising water and solids of the group consisting essentially of (A) 1 to 99% by weight of a carboxyfunctional polymer which additionally has an epoxy number of 0.2 to 4.0, (B) 1 to 99% by weight of a polymer obtained from at least one α,βolefinically unsaturated monomer, the polymer (B) having been prepared in the presence of polymer (A), (C) 0 to 20% by weight of anionic or non-ionic emulsifiers or a mixture of the two or protective colloids, and possible further conventional additives, the sum of all the solid components always being 100%.
Claim 3
Dependent Claim
20 words
An aqueous polymer dispersion as claimed in claim 1, wherein the acid number of component (A) is 1 to 200.
Claim 4
Dependent Claim
26 words
An aqueous polymer dispersion as claimed in claim 1, wherein the molecular weight (weight average M w ) of component (A) is between 2,000 and 100,000.
Claim 5
Dependent Claim
58 words
An aqueous polymer dispersion as claimed in claim 1, wherein the component (A) is obtained by reacting (a) halogen-free polycarboxylic acid units, (b) salt-forming substances from the group comprising alkali, alkaline earth and quaternary ammonium salts, organic bases and/or ammonia, (c1) polymers containing OH groups and having an OH number from 20 to 150 and/or (c2) epoxide compounds.
Claim 6
Dependent Claim
26 words
An aqueous polymer dispersion as claimed in claim 1, wherein the components (A) and (B) are each employed in quantities from 5 to 95% by weight.
Claim 7
Dependent Claim
31 words
An aqueous polymer dispersion as claimed in claim 1, wherein 0.01 to 20% by weight, relative to the total quantity of monomers (B), of α,β-ethylenically diunsaturated or triunsaturated monomers are employed.
Claim 8
Dependent Claim
70 words
An aqueous polymer dispersion as claimed in claim 1, wherein up to 100% by weight of at least one compound from the group comprising methyl methacrylate and n-butyl acrylate, 0 to 20% by weight of hydroxyethyl methacrylate, 0 to 20% by weight of glycidyl methacrylate and 0 to 20% by weight of acrylic and/or methacrylic acid are present as the component (B), the sum always being 100% of the monomers.
Claim 9
Dependent Claim
59 words
An aqueous polymer dispersion as claimed in claim 7, wherein 15 to 80% by weight of methyl methacrylate, 15 to 50% by weight of n-butyl acrylate, 0 to 15% by weight of hydroxyethyl methacrylate, 0 to 15% by weight of glycidyl methacrylate and 0 to 5% by weight of acrylic and/or methacrylic acid are employed as the component (B).
Claim 10
Dependent Claim
23 words
An aqueous polymer dispersion as claimed in claim 1, wherein the solids content of the polymer dispersion is 5 to 75% by weight.
Claim 11
Dependent Claim
100 words
A process for the preparation of the stable aqueous polymer dispersion of claim 1 comprising polymerizing, in an aqueous system at a temperature between 0° and 150° C., (B) 1 to 99% by weight of at least one α,β-olefinically unsaturated monomer in the presence of (A) 1 to 99% by weight of a carboxy-functional polymer which additionally has an epoxy number of 0.2 to 4.0 and of (C) 0 to 20% by weight of anionic or non-ionic emulsifiers or a mixture of the two or protective colloids, the quantity data relating to the solids content of components (A) to (C).
Claim 12
Dependent Claim
21 words
The process as claimed in claim 10, wherein the polymerization is carried out at a temperature from 20° to 100° C.
Claim 13
Dependent Claim
15 words
The process as claimed in claim 10, wherein no emulsifiers and/or protective colloids are employed.
Claim 14
Dependent Claim
29 words
The process as claimed in claim 10, wherein the polymerization is carried out in the presence of 0.02 to 5% by weight of an initiator which forms free radicals.
Claim 15
Dependent Claim
17 words
The process of claim 10 wherein the polymerization is effected in the presence of further conventional additives.
Claim 16
Dependent Claim
21 words
A coating system curable at room temperature or elevated temperature containing as a binder component the aqueous dispersion of claim 1.
Claim 17
Dependent Claim
16 words
The coating systems of claim 14 which are metallic basecoats, metal-free (uni)basecoats, refinishing paints or electrocoatings.
References Cited (Backward Citations)
US4444923A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-12-31 | 1994-07-02 | 1995-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-31 | 1998-07-02 | 1999-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-31 | 2002-07-02 | 2003-01-01 | $7700.00 | Window Closed / Lapsed |