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US 2022/0033692 A1Published application
Contact adhesives
AssigneeSynthomer Deutschland GmbH
InventorsPeter MULLER, Olaf KOPKE, Danny ANTES
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Abstract
The present invention relates to a polymer latex composition, a method to prepare polymer latex compositions and an article comprising said polymer latex compositions. In particular but not exclusively, the invention relates also to a one-part aqueous contact adhesive comprising said polymer latex compositions. Furthermore, the present invention refers to a method to coagulate said polymer latex compositions.
Claims15
A polymer latex composition comprising:
- (I) the reaction product obtained by free-radical emulsion polymerization in aqueous medium conducted at a pH of 7.5 or higher of a monomer mixture comprising:
- (a) at least one alkyl (meth)acrylate,
- (b) at least one ethylenically unsaturated compound comprising at least one additional functional group, the at least one additional functional group being different than the ethylenically unsaturated group;
- and
- (c) optionally at least one polyethylenically unsaturated compound;
- wherein the monomer mixture does not comprise any ethylenically unsaturated acids;
- and
- in the presence of
- (d) a surfactant system comprising anionic surfactants comprising an alkyl carboxylic acid salt,
- (II) a compound which is not polymerizable by free-radical polymerization and which comprises at least 2 functional groups capable of reacting with the at least one additional functional group of (b).
7 more elements
A method to prepare a polymer latex composition, wherein
- (I) a monomer mixture comprising:
- (a) at least one alkyl (meth)acrylate,
- (b) at least one ethylenically unsaturated compound comprising at least one additional functional group, the at least one additional functional group being different than the ethylenically unsaturated group;
- and
- (c) optionally at least one polyethylenically unsaturated compound, wherein the monomer mixture does not comprise any ethylenically unsaturated acids and is polymerized by free-radical emulsion polymerization in aqueous medium at a pH of 7.5 or higher in the presence of
- (d) a surfactant system comprising anionic surfactants comprising an alkyl carboxylic acid salt,
- (II) a compound which is not polymerizable by free-radical polymerization and which comprises at least 2 functional groups capable of reacting with the at least one additional functional group of (b) is added to the polymer latex composition before or after the free-radical emulsion polymerization.
4 more elements
Dependencies are inferred from the claim text.