10-02-2022 дата публикации
Номер: US20220041829A1
What are described are (a) a composition suitable for production of rigid polyurethane foam, comprising at least one isocyanate component, a polyol component, optionally a catalyst that catalyses the formation of a urethane or isocyanurate bond, optionally blowing agents, where the composition additionally comprises hydrocarbons HC, polyether-modified siloxane and optional polyalkylsiloxane, (b) a process for producing rigid polyurethane foam using hydrocarbons HC, polyether-modified siloxane and optional polyalkylsiloxanes, (c) the rigid polyurethane foam thus obtainable and (d) the use thereof. 1. A composition for production of rigid polyurethane foam , the composition comprising at least one isocyanate component , a polyol component , optionally a catalyst that catalyses the formation of a urethane or isocyanurate bond , optionally blowing agents , where the composition additionally comprises hydrocarbons HC that have boiling points at standard pressure of >100° C. , and polyether-modified siloxane.2. The composition according to claim 1 , wherein the hydrocarbons have 10 to 24 carbon atoms.3. The composition according to claim 1 , wherein the hydrocarbons are used in combination with polyether-modified siloxanes in a mass ratio of 1:5 to 1:200.4. The composition according to claim 1 , wherein the composition further comprises polyalkylsiloxanes claim 1 , where the polyalkylsiloxanes contain preferably less than 20 silicon atoms claim 1 ,and where the polyalkylsiloxanes in relation to the polyether-modified siloxane are preferably used in a mass ratio of 1:5 to 1:200.5. The composition according to claim 1 , wherein the proportion by mass of the total amount of hydrocarbons claim 1 , polyether-modified siloxanes and optional polyalkylsiloxanes claim 1 , based on 100 parts by mass of polyol component claim 1 , is from 0.1 to 10 pphp.6. The composition according to claim 4 , wherein the polyalkylsiloxanes conform to the formula 1:{'br': None, 'sub': a', 'b', 'c', ...
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