Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1981-02-17
1982-01-26
Cockeram, H. S.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
252431C, 252431P, 2604297, 260 457P, 260 457PH, 260 4575K, 521108, C08G 1824, C08G 1814, C08G 1816
Patent
active
043129595
ABSTRACT:
Polyurethane foams exhibiting excellent thermal and oxidative stability can be prepared using as the polymerization or gel catalyst a composition containing at least one organotin compound containing phosphorus and at least one organotin compound wherein a halogen atom is bonded to tin or phosphorus. The terminal properties of foams obtained using the present catalyst compositions are superior to those exhibited by foams prepared using gel catalyst compositions wherein tin, phosphorus and a halogen are present but the phosphorus and halogen are not in the same molecule as the tin atom. The halogen containing tin compound and the phosphorus-containing tin compound may be identical or different. The recovery properties of the foam can be improved by the presence of a carboxylic acid in the catalyst composition.
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Bossert Emily C.
Treadwell Kenneth
Cockeram H. S.
M&T Chemicals Inc.
Marcus Stanley A.
Marion Donald G.
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