Low emission, cell opening surfactants for polyurethane flexible and rigid foams
AssigneeAir Products and Chemicals, Inc.
InventorsJohn Herbert Frey, David Robert Battice, Karla Asuncion Sabram, Lenin James Petroff
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Abstract
A method for preparing a polyurethane flexible molded or rigid foam by reacting an organic polyisocyanate with a polyol in the presence of urethane catalyst, water as a blowing agent, optionally a silicone surfactant cell stabilizer, and a cell opener characterized in that the cell opener comprises the reaction product of 1,1,1,3,5,5,5-hepta(hydrocarbyl)-trisiloxane coupled with polyalkyleneoxide mono allyl ether and capped with a C1-C20 hydrocarbyl group-containing succinic anhydride.
Claims19
A method for preparing a polyurethane flexible molded or rigid foam which comprises reacting an organic polyisocyanate with a polyol in the presence of urethane catalyst, water as a blowing agent, optionally a silicone surfactant cell stabilizer, and a cell opener comprising the reaction product of a 1,1,1,3,5,5,5-hepta(hydrocarbyl)trisiloxane of the general structure ##STR4## coupled with a polyalkyleneoxide mono allyl ether and capped with a succinic anhydride, the reaction product comprising at least 90 wt % of a silicone compound, based on total silicone species, which is represented by the general structure ##STR5## where R.sup.1 is hydrogen or a C1-C2 alkyl group, R.sup.2 is hydrogen or a C1-C65 hydrocarbyl group, R.sup.3 is a C1-C20 hydrocarbyl group and x is an integer ranging from 2 to 30.
A polyurethane flexible molded foam composition prepared by mixing the following components in parts by weight (pbw):
- ______________________________________ (pbw) ______________________________________ Polyol 20-100 Polymer Polyol 80-0 Cell Stabilizer 0-3 Silicone Cell Opener 0.003-3 Water 1-8 Auxiliary Blowing Agent 0-20 Urethane Catalyst 0.3-3 Isocyanate Index 70-115 ______________________________________
- in which the silicone cell opener comprises the reaction product of 1,1,1,3,5,5,5-hepta(hydrocarbyl)trisiloxane of the general structure ##STR6## coupled with a polyalkyleneoxide mono allyl ether and capped with a succinic anhydride, the reaction product comprising at least 90 wt % of a silicone compound, based on total silicone species, which is represented by the general structure ##STR7## where R.sup.1 is hydrogen or a C1-C2 alkyl group, R.sup.2 is hydrogen or a C1-C65 hydrocarbyl group, R.sup.3 is methyl or phenyl and x is an integer ranging from 2 to 30.
A polyurethane rigid foam composition prepared by mixing the following components in parts by weight (pbw):
- ______________________________________ (pbw) ______________________________________ Polyol 100 Cell Stabilizer 0-4 Silicone Cell Opener 0.005-4 Water 1-8 Auxiliary Blowing Agent 0-55 Catalyst 0.5-6 Isocyanate Index 90-300 ______________________________________
- in which the silicone cell opener comprises the reaction product of 1,1,1,3,5,5,5-hepta(hydrocarbyl)trisiloxane of the general structure ##STR8## coupled with a polyalkyleneoxide mono allyl ether and capped with a succinic anhydride, the reaction product comprising at least 90 wt % of a silicone compound, based on total silicone species, which is represented by the general structure ##STR9## where R.sup.1 is hydrogen or a C1-C2 alkyl group, R.sup.2 is hydrogen or a C1-C65 hydrocarbyl group, R.sup.3 is methyl or phenyl and x is an integer ranging from 2 to 30.
Dependencies are inferred from the claim text.