Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1998-11-24
2000-04-18
Niland, Patrick D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524450, 524589, 528 44, 528 48, 528 57, C08J 300, C08K 320, C08K 334, C08L 7500
Patent
active
06051647&
ABSTRACT:
Mild acid treatment of potassium 3A zeolite molecular sieve to modify the pH of the surface of the molecular sieve to a pH ranging between 9.6 and 11 was found to significantly minimize the effect of the potassium 3A zeolite on the pot life when used as a drying agent for non-foamed polyurethanes. Increases in pot life in non-foamed polyurethane preparations over similar preparations with untreated potassium 3A zeolite molecular sieve were dramatic (about 400%) with less than 5% reduction in water adsorption capacity.
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Molinaro Frank S.
Niland Patrick D.
Silverman Richard P.
Tolomei John G.
UOP LLC
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