Byk-chemie Gmbh

Bernd Göebelt

Juergen Omeis

Jürgen Omeis

Karlheinz Haubennestel

Ulrich Orth

Bärbel Gertzen

Marcus Meichsner

Heribert Holtkamp

Sabine Johann

Sandra O'Shea

Gerard Reestman

Michael Sommer

Rene Nagelsdieck

The invention relates to compositions comprising two structured linear copolymers selected from the group consisting of block copolymers and gradient copolymers, these copolymers being prepared by different controlled polymerization techniques and the difference in the polydispersities of these copolymers, &#x394;(M/M), being &#x2267;0.25. The invention further relates to the production of such blends and to their use as wetting agents and dispersants.

Wetting agents and dispersants based on mixtures of structure copolymers

The invention relates to an unsaturated polyester resin mixture which can be cured by applying external pressure and which encompasses at least the following components: a) an unsaturated polyester resin whose weight-average molar mass is from 500 to 5000 g/mol; b) an ethylenically unsaturated monomer; c) a shrinkage-reducing component; d) an inert filler; and e) a reinforcing fibre; and f) from 0.01 to 1% by weight of a block copolymer, based on the total weight of the unsaturated polyester resin mixture comprising reinforcing fibre, where the block copolymer encompasses at least one A block and encompasses at least one B block, where the A block contains at least one amine-containing, ethylenically unsaturated monomer; and the B block contains at least one alkyl- and/or phenyl-containing, ethylenically unsaturated monomer, and is free from amine-containing, ethylenically unsaturated monomers. The present invention further relates to a process for preparation of the polyester resin mixtures and to the use of the block copolymers f) in unsaturated polyester resin mixtures.

Stabilized unsaturated polyester resin mixtures

Growing community of inventors

Wesel, Germany

Bernd Göebelt