10-03-2016 дата публикации
Номер: US20160068647A1
Described are (a) a process for production of polyurethane foam by reacting one or more polyol components with one or more isocyanate components, wherein wax having a congealing point in the range from 40° C. to 90° C. is employed as an additive, (b) a polyurethane foam obtainable by said process, (c) the use of waxes having a congealing point in the range from 40° C. to 90° C. as an additive in the manufacture of polyurethane foams to coarsen the foam structure, and also (d) a polyurethane foam production composition containing a wax having a congealing point in the range from 40° C. to 90° C. 1. A process for production of polyurethane foam , said process comprising:reacting one or more polyol components with one or more isocyanate components in the presence of an additive, wherein the additive is a wax having a congealing point from 40° C. to 90° C.2. The process according to claim 1 , wherein the congealing point of the wax is from 50° C. to 85° C.3. The process according to claim 1 , wherein the wax is selected from mineral waxes claim 1 , synthetic waxes and mixtures thereof.4. The process according to claim 1 , wherein the wax has a microcrystalline structure.5. The process according to claim 1 , wherein the wax is present in an amount from 0.0001 to 5 parts by weight per 100 parts by weight of polyol.6. The process according to claim 1 , wherein the wax is in a dispersed form and is present in a dispersion medium claim 1 , said dispersion medium comprising at least one organic solvent.7. A polyurethane foam obtained by a according to .8. The polyurethane foam according to claim 7 , wherein said polyurethane foam is a polyurethane flexible foam claim 7 , a hot-cure flexible foam claim 7 , a rigid foam claim 7 , an ester foam claim 7 , a viscoelastic flexible foam or a high-resilience foam (HR foam).911.-. (canceled)12. A composition for production of polyurethane foam claim 7 , said composition comprising:at least one urethane and/or isocyanurate catalyst,at ...
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