Back to results
US 2003/0204016 A1Published application
Modified polyurethanes, a process for their preparation, and electroplated or metallized molded articles produced therefrom
AssigneeBayer Aktiengesellschaft
InventorsHans-Detlef Arntz, Eduard Mayer, Helmut Meyer
Life of this patent
Estimating the term…
Abstract
Modified polyurethanes based on polyurethane reactive systems composed of at least one organic polyisocyanate and a polyol formulation, which additionally contains at least one polymer modifier and at least one filler are prepared. These modified polyurethanes are useful in the production of electroplated/metallized molded articles.
Claims4
A modified polyurethane comprising
- i) at least one polyurethane obtainable from an organic polyisocyanate, polyol and, optionally, chain extender and/or crosslinker,
- ii) at least one polymer modifier composed of at least one swellable graft rubber having a particulate structure which is dispersible in an organic polyisocyanate comprising from 20 to 80 wt. % of a rubber polymer having a glass transition temperature below 0° C. with the remainder being a grafted-on vinyl monomer and/or acrylic monomer,
- iii) at least one filler which is soluble in a pickling solution for electroplating of plastics and has a mean particle size of from 0.02 to 0.5 μm and a bulk density of from 170 to 500 kg/m3, and
- iv) optionally, one or more other conventional auxiliaries, additives and/or catalysts.
1 more element
A process for the production of a modified polyurethane comprising reacting
- a) a polyisocyanate component comprising
- a1) at least one optionally modified organic polyisocyanate having an NCO content of from 5 to 50 wt. %,
- a2) optionally, conventional auxiliary substances and additives,
- with
- b) a polyol component comprising
- b1) at least one long-chain polyether, polyether amine or polyester having an OH functionality of from 2 to 6 and a number-average molecular weight of from 1000 to 12,000 g/mol (daltons),
- b2) optionally, a short-chain polyol or polyamine having an OH or NH functionality of from 2 to 6 and a molecular weight of from 60 to 600, and
- b3) optionally, auxiliary substances and/or additives which are different from b1) and b2),
- c) at least one polymer modifier comprising at least one swellable graft rubber having a particulate structure which is dispersible in component al) which is composed of from 20 to 80 wt. % of a rubber polymer having a glass transition temperature below 0° C. and the remainder a grafted-on vinyl monomer and/or acrylic monomer, and
- d) at least one filler which is soluble in a pickling solution for electroplating of plastics and has a mean particle size of from 0.02 to 0.5 μm and a bulk density of from 170 to 500 kg/m3,
- optionally, in the presence of a catalyst.
8 more elements
Dependencies are inferred from the claim text.