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EP0082931B1
Expired / Lapsed
EP
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Aqueous polymer dispersion or emulsion presenting easily removable protective coatings, and their use in temporary surface protection
Assignee: Henkel AG and Co KGaA
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Filing: 1982-10-14
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Granted: 1986-02-26
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Expires: 2002-10-14
Abstract
No abstract record available.
Inventors
- 👤 Hans-Christoph Wilk
- 👤 Jürgen Dr. Geke
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 07:44
CPC Classifications
C; C09; C09D; C09D157/00; C09D157/04; C09D157/06; C09D5/00; C09D5/008
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
183 words
Aqueous coating compositions giving readily removable protective coatings and based on aqueous dispersions or emulsions of synthetic copolymers capable of salt formation, characterized in that they contain as their essential constituents: a) copolymers containing acid or amino groups which are capable of salt formation and which are film-forming at temperatures of 5°C and higher, being insoluble in water as such, but soluble in water in salt form and being present in aqueous dispersion or emulsion, b) water-immiscible, substantially involatile non-solvents for the copolymers a) which are liquid at room temperature and which have a solidus point below 10°C, c) nonionic emulsifiers having an HLB-value < 10 and d) optionally other standard auxiliaries and/or additives, components a) to c) being present in the following quantitative ratios: from 30 to 60 % by weight of film-forming copolymers a) from 5 to 50 % by weight of non-solvents b) from 0.05 to 2.5 % by weight of nonionic emulsifiers c), these quantities being based in every case on the weight of the aqueous dispersion of the copolymer a) without the addition of components b) to d).
Claim 2
Dependent Claim
183 words
Aqueous coating compositions giving readily removable protective coatings and based on aqueous dispersions or emulsions of synthetic copolymers capable of salt formation, characterized in that they contain as their essential constituents: a) copolymers containing acid or amino groups which are capable of salt formation and which are film-forming at temperatures of 5°C and higher, being insoluble in water as such, but soluble in water in salt form and being present in aqueous dispersion or emulsion, b) water-immiscible, substantially involatile non-solvents for the copolymers a) which are liquid at room temperature and which have a solidus point below 10°C, c) nonionic emulsifiers having an HLB-value < 10 and d) optionally other standard auxiliaries and/or additives, components a) to c) being present in the following quantitative ratios: from 30 to 60 % by weight of film-forming copolymers a) from 5 to 50 % by weight of non-solvents b) from 0.05 to 2.5 % by weight of nonionic emulsifiers c), these quantities being based in every case on the weight of the aqueous dispersion of the copolymer a) without the addition of components b) to d).
Claim 3
Dependent Claim
30 words
Coating compositions as claimed in Claim 1, characterized in that the polymer compound a) is a copolymer containing free carboxyl groups which is soluble in water in the alkaline range.
Claim 4
Dependent Claim
60 words
Coating compositions as claimed in Claims 1 and 2, characterized in that the polymer compound a) is a copolymer of unsaturated mono- and/or dicarboxylic acids preferably containing up to 5 C-atoms and comonomers copolymerizable therewith which, in the case of emulsion copolymerization in water as continuous phase, form a discrete disperse liquid phase, water-soluble comonomers having been used if desired.
Claim 5
Dependent Claim
40 words
Coating compositions as claimed in Claims 1 to 3, characterized in that the copolymer a) contains acrylic acid, methacrylic acid, itaconic acid, citraconic acid, crotonic acid, fumaric acid, maleic acid and/or anhydrides or semiesters thereof as the carboxylic acid component.
Claim 6
Dependent Claim
51 words
Coating compositions as claimed in Claims 1 to 4, characterized in that the quantity of carboxylic acid functions - expressed as acrylic acid - in the copolymer a) is in the range from about 5 to 35% by weight and preferably in the range from about 10 to 25% by weight.
Claim 7
Dependent Claim
61 words
Coating compositions as claimed in Claims 1 to 5, characterized in that esters of unsaturated copolymerizable carboxylic acids and/or alcohols, optionally Nsubstituted amides of unsaturated carboxylic acids, aromatic vinyl compounds, unsaturated nitriles or halides and/or olefins without further functionality are present as comonomers in the copolymer a), comonomers from the group comprising alkyl (meth)acrylates, hydroxyalkyl (meth)acrylates, styrene and/or acrylonitrile being preferred.
Claim 8
Dependent Claim
25 words
Coating compositions as claimed in Claim 1, characterized in that the copolymer a) is a copolymer containing up to 60% by weight of amino groups.
Claim 9
Dependent Claim
46 words
Coating compositions as claimed in Claims 1 and 7, characterized in that esters and/or amides of unsaturated carboxylic acids preferably containing up to 5 C-atoms and alcohols and/or primary amines . additionally containing a tertiary amino group are present as amino-group-containing monomers in the copolymer a).
Claim 10
Dependent Claim
36 words
Coating compositions as claimed in Claims 1, 7 and 8, characterized in that dimethylaminoethyl acrylate, dimethylaminopropyl acrylate, dimethylaminoneopentyl acrylate, the corresponding methacrylates and/or the corresponding diethylamino compounds are present as amino-group-containing monomers in the copolymer a).
Claim 11
Dependent Claim
61 words
Coating compositions as claimed in Claims 1 to 9, characterized in that substantially involatile paraffin or isoparaffin mixtures preferably containing more than 10 C-atoms, carboxylic acids and/or alcohols containing more than 6 C-atoms, ether alcohols containing more than 10 C-atoms, all liquid at room temperature, and/or corresponding substantially involatile esters liquid at room temperature are present as the non-solvent component b).
Claim 12
Dependent Claim
62 words
Coating compositions as claimed in Claims 1 to 10, characterized in that at least one of the following compounds is present as the non-solvent component b): esters of straightchain, natural or branched fatty acids with C t -C 4 monoalcohols, esters of dicarboxylic acids, particularly esters of phthalic acid with C 6 -C S alcohols, is present as the non-solvent component b).
Claim 13
Dependent Claim
19 words
Coating compositions as claimed in Claim 10, characterized in that the non-solvent component b) is a naturally occurring triglyceride.
Claim 14
Dependent Claim
58 words
Coating compositions as claimed in Claims 1 to 12, characterized in that the reaction product of nonyl phenol with 2 to 7 moles of ethylene oxide and/or the reaction product of a fatty alcohol containing more than 10 C-atoms with 2 to 8 moles of ethylene oxide and/or a sorbitan ester is present as the nonionic emulsifier c).
Claim 15
Dependent Claim
69 words
Coating compositions as claimed in Claims 1 to 13, characterized in that the film-forming copolymer a) is present in quantities of from about 30 to 60% by weight, the non-solvent b) in quantities of from about 5 to 50 % by weight and the nonionic emulsifier c) in a quantity of from 0.05 to 2.5% by weight, based in every case on the aqueous dispersion of the copolymer a).
Claim 16
Dependent Claim
132 words
Coating compositions as claimed in Claims 1 to 14, characterized in that they contain the following essential constituents: as component a): a copolymer, soluble in water in alkaline medium, based on acrylic polymers containing from 5 to 35% by weight of carboxylic acid functions (expressed as acrylic acid) and other comonomers from the group comprising alkyl (meth)acrylates, hydroxyalkyl acrylates, styrene and acrylonitrile, as component b): hydrophobic liquid plasticizers having a solidus point below 10°C, the ratio by weight of a) to b) being from about 20:1 to 20:10 and as component c): nonionic emulsifiers having an HLB-value of from 2 to 10 in a quantity of from 1 to 5% by weight, based on the sum of components a) and b) and optionally as component d): anionic emulsifiers, dyes, pigments and/or stabilizers.
Claim 17
Dependent Claim
56 words
Coating compositions as claimed in Claim 15, characterized in that component a) is prepared from monomers active in the direction of high glass temperatures and monomers active in the direction of low glass temperatures in a ratio by weight of from-4:1 to 1:1 and in that component b) is a plasticizer liquid up to 30° C.
Claim 18
Dependent Claim
41 words
The use of the coating compositions claimed in Claims 1 to 16 for the temporary surface protection of, in particular, metallic and/or lacquered surfaces, such as automobile bodies and other objects stored in the open air against climatic and/or mechanical influences.
References Cited (Backward Citations)
No citation records indexed.
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