Wacker-chemie Gmbh

Wilhelm Kaiser

Christof Kemenater

Herbert Eck

Rudolf Weissgerber

Reinhard Haerzschel

Manfred Hannebaum

Hartmut Brabetz

Herbert Kaiser

Franz Six

The invention relates to adhesive compositions for gluing wood containing aqueous vinyl ester graft copolymer dispersions and water-soluble acid metal salts or free acids, in which the adhesive compositions exhibit outstanding resistance to hot water and have high storage stability. The vinyl ester graft copolymer comprises from 2 to 12 percent by weight, based on the total weight of the graft copolymer, of one or more polyvinyl alcohols having a degree of hydrolysis of from 60 to 99 mol persent and 88 to 98 percent by weight, based on the total weight of the graft copolymer, of a grafting monomer mixture. The grafting monomer mixture contains from 5 to 50 percent by weight, based on the total weight of the monomer mixture, of vinyl esters of saturated, highly branched aliphatic monocarboxylic acids having 9 or 10 carbon atoms, vinyl pivalate, diisopropyl maleate, diisopropyl fumarate, vinyl chloride and mixtures thereof.

Adhesive compositions containing aqueous copolymer dispersions and acid

The invention relates to aqueous copolymer dispersions containing high proportions of vinyl chloride units in the copolymer, together with vinyl acetate units and ethylene units, which dispersions contain only polyvinyl alcohol as protective colloid; as well as to their manufacture and to their use.

Aqueous vinylchloride/vinyl acetate/ethylene copolymers and process

An aqueous copolymer adhesive dispersion having a long pot life and giving highly waterproof bonds, comprising an acid hardener of water-soluble acids having pKs of under 0 and an aqueous dispersion of a pre-crosslinked polyvinyl ester grafted onto polyvinyl alcohol, said polyvinyl ester being an ester of an acid of 1 to 12 carbon atoms and said pre-crosslinking caused by the presence of small amounts of poly-ethylenically-unsaturated compounds in the monomer mixture, as well as the aqueous dispersion and the method for its production.

Adhesive aqueous dispersions of polyvinyl alcohol graft polymers with

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Burghausen, Germany

Wilhelm Kaiser