Plastic moldings from optionally filled polyurethanes and their use
AssigneeBayer MaterialScience AG
InventorsPeter Haas, Reiner Paul, Dirk Wegener
Life of this patent
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Abstract
The present invention relates to plastic moldings that are prepared from optionally filled polyurethanes. The plastic molding of the present invention exhibit high tenacity, flexural strength and heat stability. This invention also relates to a process for the preparation of these plastic moldings and specifically to a process for the production of large parts comprising these plastic moldings.
Claims7
Plastic moldings comprising optionally filled polyurethanes, in which the polyurethane comprises the reaction product of:
- a) at least one polyisocyanate and/or polyisocyanate prepolymer;
- b) an isocyanate-reactive component comprising:
- b1) at least one polyol component,
- and at least one filler-containing polyol component selected from the group consisting of:
- b2) one or more polyol dispersions containing polyurea, and
- b3) at least one polydispersions containing polyisocyanate polyaddition products with alkanolamines;
- c) at least one chain extender and/or crosslinking agent and which contains from 2 to 6 hydroxyl groups per molecule and has a molecular weight of 62 to 499;
- d) at least one trimerization catalyst;
- e) optionally, one or more urethane catalysts;
- f) optionally, one or more blowing catalysts;
- g) optionally, one or more stabilizers and/or auxiliary substances;
- and
- h) optionally, one or more reinforcing agents;
- wherein the isocyanate index is from 200 to 1000, and said moldings have a density of at least 0.8 g/cm3.
A process for the preparation of plastic moldings having a density of at least 0.8 g/cm3 and which comprise optionally filled polyurethanes, comprising reacting:
- a) at least one polyisocyanate and/or polyisocyanate prepolymer;
- b) an isocyanate-reactive component comprising:
- b1) at least one polyol component,
- and at least one filler-containing polyol component selected from the group consisting of:
- b2) one or more polyol dispersions containing polyurea,
- and
- b3) at least one polydispersions containing polyisocyanate polyaddition products with alkanolamines;
- c) at least one chain extender and/or crosslinking agent and which contains from 2 to 6 hydroxyl groups per molecule and has a molecular weight of 62 to 499;
- d) at least one trimerization catalyst;
- e) optionally, one or more urethane catalysts;
- f) optionally, one or more blowing catalysts;
- g) optionally, one or more stabilizers and/or auxiliary substances;
- and
- h) optionally, one or more reinforcing agents, at an isocyanate index of 200 to 1000.
Dependencies are inferred from the claim text.