US 4,058,493 A · Polyester urethane foam produced with cyano-ether polysiloxane-polyoxyalkylene copolymers

Abstract

Organosilicone compositions are provided which comprise polysiloxane-polyoxyalkylene copolymers containing monofunctional siloxy units and difunctional siloxy units, an average of between about 2 and about 20 silicon-bonded cyano-bearing ether groups for every two moles of monofunctional units, said cyano-bearing ether groups having the formula, --(O).sub.q R'OR"CN, wherein q is 0 or 1, R' is bivalent alkylene of 3 to 8 carbon atoms and R" is bivalent alkylene of 2 to 4 carbon atoms, and an average of between about 2 and about 30 silicon-bonded, organic-capped polyoxyalkylene blocks for every two moles of monofunctional units, at least 75 weight percent of the polyoxyalkylene content of said copolymers being constituted of oxyethylene units, said monofunctional units having at least two alkyls bonded to the respective silicon atoms thereof and the difunctional units having at least one alkyl bonded to the respective silicon atoms thereof, the remaining organic group bonded to silicon of the respective monofunctional and difunctional siloxy units being alkyl, said cyano-bearing ether group or said polyoxyalkylene block. The polymers of the invention are effective stabilizers of flexible polyester polyol-based polyurethane foam and offer particular advantage in the formation of flame-retarded foam.

Claims14

Dependent claims

A process for producing flexible polyurethane foam which comprises simultaneously reacting and foaming a reaction mixture containing:

(a) a polyester polyol reactant having an average of at least two hydroxyl groups per molecule;
(b) a polyisocyanate reactant containing at least two isocyanato groups per molecule;
(c) a blowing agent;
(d) a catalyst comprising an amine;
and (e) a foam stabilizer comprising polysiloxane-polyoxyalkylene copolymers having the average composition, ##STR46## wherein:
R is alkyl having from one to 10 carbon atoms;
Q is a cyano-bearing ether group having the formula, --(O).sub.q R'OR"CN, wherein q is 0 or 1, R' is bivalent alkylene having from 3 to 8 carbon atoms and R" isbivalent alkylene of 2 to 4 carbon atoms;
E is a polyoxyalkylene block having the formula, --(R.degree.).sub.p --(OC.sub.a H.sub.2a).sub.b --OG, wherein R.degree. comprises a bivalent alkylene group a carbon atom of which is bonded to silicon, G comprises a monovalent hydrocarbon group having from 1 to 12 carbon atoms, p is zero or one, --(OC.sub.a H.sub.2a).sub.b -- is a polyoxyalkylene chain constituted of at least 75 weight percent of oxyethylene and wherein b has an average value from about 3 to about 30;
each of t, u, v and w is independently 0 or 1 provided each of the sums b+u and v+w is 0 or 1;
each of the sums t+w and u+v is independently 0, 1 or 2;
x is zero or a positive number having an average value up to about 20;
y has an average value from about 2 to about 20;
and z has an average value from about 2 to about 30.

10 more elements

A solution composition which comprises components (1) and (2) and at least one of components (3) and (4) wherein:

component (1) is a siloxane-polyoxyalkylene copolymer having the average composition, ##STR49## wherein:
R is alkyl having from 1 to 10 carbon atoms, R' is bivalent alkylene of from 3 to 8 carbon atoms, R" is bivalent alkylene of from 2 to 4 carbon atoms, R.degree. comprises a bivalent alkylene group a carbon atom of which is bonded to silicon, G comprises a monovalent hydrocarbon group having from 1 to 12 carbon atoms, --(OC.sub.a H.sub.2a).sub.b -- is a polyoxyalkylene chain constituted of at least 75 weight percent of oxyethylene and wherein the average value of b is from about 3 to about 30, p is 0 or 1, q is 0 or 1, x is 0 or a positive number having an average value up to about 20, y has an average value from about 2 to about 20, and z has an average value from about 2 to about 30;
component (2) is an organic acidic component comprising at least one acid of the group consisting of an aliphatic and a cycloaliphatic monocarboxylic acid having from 15 to 20 carbon atoms and is present in said solution in an amount from about 5 to about 90 parts by weight per 100 parts by weight of said copolymer;
component (3) is a water soluble, silicon-free organic surfactant;
component (4) is a water-soluble glycol;
and wherein the weight of component (3) when present, the weight of component (4) when present, and the combined total weight of components (3) and (4) when both are present, ranges from about 5 to about 90 parts by weight per 100 parts by weight of said copolymer.

3 more elements

Dependencies are inferred from the claim text.

Polyester urethane foam produced with cyano-ether polysiloxane-polyoxyalkylene copolymers

Life of this patent

Polyester urethane foam produced with cyano-ether polysiloxane-polyoxyalkylene copolymers

Life of this patent

Abstract

Claims14