Low-density polyurethane foam materials and their use in shoe soles
AssigneeBASF SE
InventorsMarkus Schütte, Anton Kappes, Marco Ortalda
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Abstract
The invention relates to “low-density” polyurethane foams, preferably “low-density” flexible integral polyurethane foams, i.e. polyurethane foams with density of from 120 grams per liter (herein after termed g/L) to less than 300 g/L, obtainable via reaction of polyisocyanates (a) with a polyol component (b) comprising the following constituents: polyesterol (b-1) and polymer polyesterol (b-2), where the proportion of polymer polyesterols (b-2) is from more than 5 to less than 50% by weight, based on the total weight of component (b), and, if appropriate, chain extenders (c), in the presence of water (d) as blowing agent, and also to their use in shoe soles.
Claims10
A polyurethane foam with density of from 120 g/L to less than 300 g/L,
- obtainable via reaction of
- a) a polyisocyanate component with
- b) a polyol component, comprising the following constituents:
- b-1) polyesterols with viscosity of from 150 mPas to 600 mPas, measured to DIN 53015 at 75° C., and
- b-2) polymer polyesterols, where the proportion of polymer polyesterols (b-2) is from more than 5 to less than 50% by weight based on the total weight of component (b), and
- c) if appropriate, chain extenders, in the presence of
- d) blowing agent comprising water.
A process for production of polyurethane foams with density of from 120 g/L to less than 300 g/L, via reaction of
- a) a polyisocyanate component with
- b) a polyol component, comprising the following constituents:
- b-1) polyesterols with viscosity of from 150 mPas to 600 mPas, measured to DIN 53015 at 75° C., and
- b-2) polymer polyesterols, where the proportion of polymer polyesterols (b-2) is from more than 5 to less than 50% by weight based on the total weight of component (b), and
- c) if appropriate, chain extenders, in the presence of
- d) water as blowing agent.
Dependencies are inferred from the claim text.