US4886845A
Expired / Lapsed
US
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Stable aqueous epoxy resin dispersion, process for the preparation thereof and use thereof
Assignee: Solutia Germany GmbH and Co KG
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Filing: 1987-12-18
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Granted: 1989-12-12
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Expires: 2007-12-18
Abstract
Abstract The invention relates to stable epoxy resin dispersions and also a process for the preparation thereof and the use thereof, in particular for coatings. The epoxy resin dispersions which are remarkable, in particular, for good storage stability with a low content of organic solvents at the same time and yield coatings with good surface properties, contain, in addition to water, optionally small quantities of organic solvents and also optionally usual additives, epoxy resin hardeners and the like, as an essential constituent a condensation product of (a) 50 to 80% by weight of an epoxy compound containing at least two epoxy groups per molecule and having an epoxy equivalent of 100 to 2,000, (b) 35 to 17% by weight of an aromatic polyol and (c) 15 to 3% by weight of a condensation product of an aliphatic polyol with a molecular weight (Mw) of 200 to 20,000 and an epoxy compound containing at least two epoxy groups per molecule and having an epoxy equivalent of 100 to 2,000, the equivalent ratio of the OH groups to the epoxy groups being 1:0.85 to 1:3.5 and the epoxy equivalent of said condensation product being between 200 and at least 50,000.
Inventors
- 👤 Wilhelm Becker
- 👤 Claus Godau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:26
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/02; C08G59/04
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
153 words
An aqueous dispersion comprising a self-emulsifying epoxy resin (A), wherein the self-emulsifying epoxy resin (A) has an epoxy equivalent of between 250 and 10,000 and a mean particle size of 0.25 to 1.0 μm and is a condensation product of (a) 50 to 80% by weight of an epoxy compound containing at least two epoxy groups per molecule and having an epoxy equivalent of 100 to 2,000, (b) 35 to 17% by weight of an polyhydric phenol and (c) 15 to 3% by weight of a condensation product of an aliphatic polyol with a mean molecular weight (Mw) of 200 to 20,000 and an epoxy compound containing at least two epoxy groups per molecule and having an epoxy equivalent of 100 to 2,000, the equivalent ratio of the OH groups to the epoxy groups being 1:0.95 to 1:3.5 and the epoxy equivalent of said condensation product being between 200 and at least 50,000.
Claim 2
Dependent Claim
153 words
An aqueous dispersion comprising a self-emulsifying epoxy resin (A), wherein the self-emulsifying epoxy resin (A) has an epoxy equivalent of between 250 and 10,000 and a mean particle size of 0.25 to 1.0 μm and is a condensation product of (a) 50 to 80% by weight of an epoxy compound containing at least two epoxy groups per molecule and having an epoxy equivalent of 100 to 2,000, (b) 35 to 17% by weight of an polyhydric phenol and (c) 15 to 3% by weight of a condensation product of an aliphatic polyol with a mean molecular weight (Mw) of 200 to 20,000 and an epoxy compound containing at least two epoxy groups per molecule and having an epoxy equivalent of 100 to 2,000, the equivalent ratio of the OH groups to the epoxy groups being 1:0.95 to 1:3.5 and the epoxy equivalent of said condensation product being between 200 and at least 50,000.
Claim 3
Dependent Claim
36 words
An epoxy resin dispersion as claimed in claim 1, wherein the quantity of the self-emulsifying epoxy resin is 30 to 70% by weight, referred to the total dispersion, and the epoxy equivalent is 450 to 2,500.
Claim 4
Dependent Claim
39 words
An epoxy resin dispersion as claimed in claim 1, wherein the epoxy compounds corresponding to A(a) and A(c) are at least one member of the group consisting of polyglycidyl ethers and polyglycidyl esters based on polyhydric phenols and novolaks.
Claim 5
Dependent Claim
16 words
An epoxy resin dispersion as claimed in claim 3, wherein the polyhydric phenol is bisphenol A.
Claim 6
Dependent Claim
20 words
An epoxy resin dispersion as claimed in claim 3, wherein the epoxy compounds have epoxy equivalents of 170 to 1,000.
Claim 7
Dependent Claim
28 words
An epoxy resin dispersion as claimed in claim 1, wherein the aliphatic polyol corresponding to A(c) is polyalkylene glycol having a molecular weight (Mw) of 600 to 12,000.
Claim 8
Dependent Claim
27 words
An epoxy resin dispersion as claimed in claim 1, wherein the quantity of A(c) is 4 to 9% by weight, referred to the total self-emulsifying epoxy resin.
Claim 9
Dependent Claim
60 words
Epoxy resin dispersion as claimed in claim 1, wherein, in the condensation product (c), the equivalent ratio of the OH groups to the epoxy groups is either (c 1 ) 1:0.85 to 1:1.5 and the epoxy equivalent is at least 100,000 or (c 2 ) the equivalent ratio is 1:1.8 to 1:3.5 and the epoxy equivalent is 400 to 10,000.
Claim 10
Dependent Claim
20 words
An epoxy resin dispersion as claimed in claim 1, wherein the quantity of water is 30 to 55% by weight.
Claim 11
Dependent Claim
25 words
An epoxy resin dispersion as claimed in claim 1, wherein it contains up to 15% by weight, referred to the total dispersion, of organic solvents.
Claim 12
Dependent Claim
21 words
An epoxy resin dispersion as claimed in claim 10, wherein the quantity of organic solvents is 2 to 15% by weight.
Claim 13
Dependent Claim
71 words
An epoxy resin dispersion as claimed in claim 11, wherein ethylene glycol mono- or diethers, propylene glycol mono- or diethers, butylene glycol mono- or diethers of monoalcohols having an branched or unbranched alkyl radicalscontaining 1 to 6 carbon atoms, aliphatic alcohols having unbranched or branched alkyl radicals containing 1 to 12 carbon atoms, araliphatic and cycloaliphatic alcohols, aromatic compounds or ketones are employed individually or as a mixture as organic solvents.
Claim 14
Dependent Claim
26 words
An epoxy resin dispersion as claimed in claim 1, wherein it contains additional constituents (D) from the group comprising normal additives, hardeners and other thermosetting resins.
Claim 15
Dependent Claim
19 words
An epoxy resin dispersion as claimed in claim 13, characterized in that basic or acidic hardeners serve as hardeners.
Claim 16
Dependent Claim
35 words
An epoxy resin dispersion as claimed in claim 14, wherein base hardeners are polyoxypropylene amines, polyglycidyl ether/amine adducts or polyamidoamines, said amine hardeners being used in an epoxy equivalent ratio of 1: (0.75 to 1.5).
Claim 17
Dependent Claim
19 words
Epoxy resin dispersion as claimed in claim 15, wherein amine and/or phenolic resins are employed as further thermosetting resins.
Claim 18
Dependent Claim
24 words
An epoxy resin dispersion as claimed in claim 1, wherein the mean particle size of the self-emulsifying epoxy resin is 0.25 to 0.8 μm.
Claim 19
Dependent Claim
64 words
A process for the preparation of the epoxy resin dispersion as claimed in claim 1 wherein self-emulsifying epoxy resin (A) is first prepared by condensation of the three components A(a), A(b) and A(c) at elevated temperatures in the presence of a condensation catalyst and then appropriate quantities of water are added at 30° to 100° C. with vigorous stirring to the solution thus obtained.
Claim 20
Dependent Claim
20 words
The process as claimed in claim 18 wherein the condensation is carried out at temperatures of 120° to 220° C.
Claim 21
Dependent Claim
23 words
The process as claimed in claim 18, wherein the addition of the compounds corresponding to (D) is carried out only immediately before use.
Claim 22
Dependent Claim
16 words
Painting materials, coatings, molding compounds and thermosetting materials containing the epoxy resin dispersion of claim 1.
Claim 23
Dependent Claim
22 words
The process as claimed in claim 18 wherein the condensation is carried out in the presence of at least one organic solvent.
Claim 24
Dependent Claim
25 words
The process as claimed in claim 22, wherein at least one organic solvent is further added to the resin (A) subsequent to the condensation reaction.
Claim 25
Dependent Claim
25 words
The process as claimed in claim 23, wherein the total quantity of organic solvent is up to 15% by weight, calculated on the total dispersion.
Claim 26
Dependent Claim
27 words
The process as claimed in claim 18, wherein compounds of the group consisting of additives, hardeners and other thermosetting resins, are added to the epoxy resin dispersion.
Claim 27
Dependent Claim
17 words
The process as claimed in claim 25 wherein the said compounds are added only immediately before use.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-11 | 1993-06-12 | 1993-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-11 | 1997-06-12 | 1997-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-11 | 2001-06-12 | 2001-12-12 | $7700.00 | Window Closed / Lapsed |