Process for producing an adhesive coating on polymethyl methacrylate (PMMA) substrate surfaces
OwnerRainer Goetzelmann, Heinrich Gruenwald +3inventors
InventorsRainer Goetzelmann, Heinrich Gruenwald, Friedrich Scheerer, Joerg Terhuerne, Alfons Zoeller
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Abstract
An adhesive coating with optical and/or mechanical functions is applied to a PMMA substrate surface, a organic compound which is polymerized by radicals being used as the adhesive-providing layer. The coating with the optical and/or mechanical function(s) is obtained after radical-induced polymerization of the adhesive-providing layer.
Claims15
A process for producing a firmly adhering coating with optical and/or mechanical functions on a polymethyl methacrylate substrate surface, comprising:
- (a) the substrate surface is free-radicalized by a brief exposure to a low-pressure plasma, comprising a time of up to approximately 30 seconds, in a first step,
- (b) subsequently a free-radically polymerizing organic monomer compound is applied as an adhesion-promoting layer in a second step, and
- (c) following free-radically induced polymerization of the adhesion-promoting layer, performed by the combined influence of the first and second steps, coating with the optical and/or mechanical function takes place in a third step.
A process for producing a firmly adhering coating with optical and/or mechanical functions on a polymethyl methacrylate substrate surface, comprising:
- (a) a free-radically polymerizing organic monomer compound is applied as an adhesion-promoting layer in a first step,
- (b) said adhesion-promoting layer is subsequently free-radicalized by brief exposure to a low-pressure plasma comprising a time of up to about 30 seconds, in a second step, and
- (c) following the free-radically induced polymerization of the adhesion-promoting layer, performed by the combined influence of the first and second steps, coating with the optical and/or mechanical function takes place in a third step.
A process for producing a firmly adhering coating with optical and/or mechanical functions on a polymethyl methacrylate substrate surface comprising:
- free-radicalizing the substrate surface by brief exposure to a low-pressure plasma;
- applying a free-radically polymerizing organic monomer to said surface as an adhesion-promoting layer;
- coating said surface with a compound capable of imparting scratch resistance in order to produce said optical and/or mechanical function.
Dependencies are inferred from the claim text.