Polyurethane foam forming compositions
AssigneeSoudal
InventorsYvo F. H Trimbos, Thomas Duijsters, Ivan Boeykens, Peter Geboes
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Abstract
The present invention relates to the field of polyol components suitable for forming polyurethane foam, in particular two component polyurethane foam the resulting foams and methods for their production. The present inventors found gaseous hydrohaloolefin containing polyol components possessing improved shelf-life properties, in particular polyol components comprising a gaseous hydrohaloolefin blowing agent, a nitrogen catalyst and a tin catalyst, wherein the tin catalyst comprises a sulfur atom. The present inventors also found that the shelf-life is further improved if the nitrogen catalyst is at least partially protonated by reaction with an acid, such as an organic acid.
Claims15
A polyol component suitable for producing two component polyurethane foam wherein the polyol component comprises a polyol;
- a gaseous hydrohaloolefin blowing agent;
- a nitrogen catalyst;
- and a tin catalyst, wherein the tin catalyst comprises a sulfur atom, wherein the gaseous hydrohaloolefin blowing agent is selected from 1,3,3,3-tetrafluoropropene (HFO 1234ze);
- 2,3,3,3-tetrafluoroprop-1-ene (HFO 1234yf);
- 1,2,3,3,3-pentafluoropropene (HFO 1225ye);
- 1,1,3,3,3-pentafluoropropene (HFO 1225zc);
- 1,1,2,3,3-pentafluoropropene (HFO 1225yc);
- or a combination thereof wherein the polyol component exhibits a catalytic decay ratio (CDR) after 7 days of aging at 50° C. of less than 2 and/or exhibits an increase in tack free time after 7 days of aging at 50° C. of less than 50%.
Dependencies are inferred from the claim text.