Production of self-adhesive coatings on flat substrates
AssigneeBadische Anilin- & Soda-Fabrik Aktiengesellschaft
InventorsKlaus Eisentraeger, Guenther Immel, Matthias Marx, Hans Reinhard, Herbert Spoor, Gerhard Storck
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Abstract
Self-adhesive coatings are produced on sheet materials in a simple and particularly trouble-free manner by applying to said materials mixtures of 1. acrylic ester copolymers containing polymerized units of unsaturated carboxylic acids or hydroxyl-containing vinyl monomers in addition to polymerized units of higher alkyl acrylates, 2. melamine/formaldehyde resins and, optionally, 3. solvents for components (1) and (2), And evaporating off any solvents.
Claims10
A process for the production of self-adhesive coatings by applying thin films of self-adhesive polyacrylates to the surface of flat substrates which comprises applying to said surface a mixture of
- A. a copolymer of
- a. from 0.3 to 10% w/w of a C.sub.3-5 mono-olefinically unsaturated mono- or di-carboxylic acid or a vinyl monomer containing at least one hydroxyl group with
- b. up to 99.7% w/w of an alkyl acrylate having C.sub.6-12 alkyl groups,
- c. from 0 to 60% w/w of mono-olefinically unsaturated C.sub.4-7 carboxylates and
- d. from 0 to 10% w/w of other olefinically unsaturated monomers;
- B. from 0.5 to 8% by weight of the weight of copolymer (A) of melamine/formaldehyde resins, the molar ratio of melamine to formaldehyde in the melamine/formaldehyde resin being from 1:3 to 1:6
- and heating the coating to a temperature of at least 50.degree. C.
Dependencies are inferred from the claim text.