Treatment of cellulose substrates
AssigneeMorgan Adhesives Company
InventorsRobert Stocq, Laure Waegemans
Life of this patent
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Abstract
The invention concerns a method for treating a cellulosic support to reduce the penetration of anti-adhesive agent into the support and/or to diminish its sensitivity to water. Said method consists in contacting the cellulosic support with an aqueous emulsion based on a grafted functionalised polyorganosiloxane, wherein said emulsion further contains an acrylic-type polymeric material, said polymeric material advantageously containing a styrene fraction.
Claims23
A process for the treatment of a cellulose substrate to reduce the penetration of adhesive-resistant agent into the substrate and/or to decrease the sensitivity to water of the substrate comprising:
- contacting the cellulose substrate with an aqueous emulsion comprising an acrylic polymeric material and further comprising a grafted functionalized polyorganosiloxane comprising polymer chains comprising residues of at least one ethylenically unsaturated monomer (a) capable of being polymerized by the radical polymerization grafted on a functionalized polyorganosiloxane comprising units of the following formula (I):
- RaYbXcSiO(4−a−b−c)/2
- wherein R is C1═C18 alkyl, C2-C20 alkenyl or C6-C12 aryl, optionally substituted with halogen;
- X is a reactive function linked to Si by Si—C or Si—C—O bond;
- Y is ethylenically unsaturated hydrocarbon group, optionally containing O or N heteroatom, linked to Si by Si—C bond and capable to react radically with the unsaturated monomer (a);
- a, b and c are 0 to 3 and a+b+c=3;
- and the content of SiO4/2 is less than 30%.
Dependencies are inferred from the claim text.