Siloxane-modified epoxy resin compositions

Claim 2

A HOMOGENEOUS POLYMERIC DISPERSION COMPRISING A. 55 TO 95 WEIGHT PERCENT OF A CURABLE EPOXY RESIN COMPOSITION, SAID EPOXY RESIN HAVING AN AVERAGE OF MORE THAN ONE 1,2-EPOXIDE GROUP PER MOLECULE; B. 4 TO 35 WEIGHT PERCENT OF A FLUID LUBRICANT WHICH IS INCOMPATIBLE WITH THE EPOXY RESIN COMPOSITION, SAID FLUID HAVING A VISCOSITY IN THE RANGE OF 20 TO 20,000,000 CS. AT 25*C.; C. 1 TO 10 PARTS WEIGHT PERCENT OF A DISPERSING AGENT CAPABLE OF MAINTAINING (B) DISPERSED IN (A), SAID DIS BEING A SILOXANE COPOLYMER SELECTED FROM THE GROUP CONSISTING OF

Claim 3

COPOLYMERS CONSISTING ESSENTIALLY OF SIO2 UNITS (CU3)3SIO1 2 UNITS AND Q(CH3)2SIO1 2 UNITS WHICH Q IS A POLYOXYPROPYLENE-POLYMER, A POLYOXYETHYLENE POLYMER, OR A POLYOXYPROPYLENE-POLYOXYETHYLENE COPOLYMER RADICAL HAVING A MOLECULAR WEIGHT IN THE RANGE OF 500 TO 6,000, Q BEING ATTACHED TO THE SILICON ATOM VIA A SILICON-CARBON BOND, THE RATIO OF THE SIO2 UNITS TO THE TOATL (CH3)3SIO1/2 AND Q(CH3)2SIO1/2 UNITS BEING IN THE RANGE OF 1:0.4 TO 1:1.2 AND

Claim 4

COPOLYMERS CONSISTING ESSENTIALLY OF SIO2 UNITS (CU3)3SIO1 2 UNITS AND Q(CH3)2SIO1 2 UNITS WHICH Q IS A POLYOXYPROPYLENE-POLYMER, A POLYOXYETHYLENE POLYMER, OR A POLYOXYPROPYLENE-POLYOXYETHYLENE COPOLYMER RADICAL HAVING A MOLECULAR WEIGHT IN THE RANGE OF 500 TO 6,000, Q BEING ATTACHED TO THE SILICON ATOM VIA A SILICON-CARBON BOND, THE RATIO OF THE SIO2 UNITS TO THE TOATL (CH3)3SIO1/2 AND Q(CH3)2SIO1/2 UNITS BEING IN THE RANGE OF 1:0.4 TO 1:1.2 AND

Claim 5

COPOLYMERS WHICH ARE REACTION PRODUCTS DERIVED FROM HEATING A MIXTURE OF A SILOXANE COPOLYMER CONSISTING ESSENTIALLY OF SIO2 UNITS AND (CH3)3SIO1 2 UNITS IN WHICH THE RATIO OF SIO2 UNITS TO (CH3)3SIO1 2 UNITS IS IN THE RANGE OF 1:0.4 TO 1:1.2 AND A HYDROXYLATED POLYOXYPROPYLENE POLYMER, A HYDROXYLATED POLYOXYETHYLENE POLYMER, OR A HYDROXYLATED POLYOXYPROPYLENE POLYOXETHYLENE COPOLYMER HAVING A MOLECULAR WEIGHT IN THE RANGE OF 500 TO 6,000.

Claim 6

COPOLYMERS WHICH ARE REACTION PRODUCTS DERIVED FROM HEATING A MIXTURE OF A SILOXANE COPOLYMER CONSISTING ESSENTIALLY OF SIO2 UNITS AND (CH3)3SIO1 2 UNITS IN WHICH THE RATIO OF SIO2 UNITS TO (CH3)3SIO1 2 UNITS IS IN THE RANGE OF 1:0.4 TO 1:1.2 AND A HYDROXYLATED POLYOXYPROPYLENE POLYMER, A HYDROXYLATED POLYOXYETHYLENE POLYMER, OR A HYDROXYLATED POLYOXYPROPYLENE POLYOXETHYLENE COPOLYMER HAVING A MOLECULAR WEIGHT IN THE RANGE OF 500 TO 6,000.

Claim 7

copolymers which are reaction products derived from heating a mixture of a siloxane copolymer consisting essentIally of SiO2 units and (CH3)3SiO1/2 units in which the ratio of SiO2 units to (CH3)3SiO1/2 units is in the range of 1:0.4 to 1:1.2, and a hydroxylated polyoxypropylene polymer, a hydroxylated polyoxyethylene polymer, or a hydroxylated polyoxypropylene-polyoxyethylene copolymer having a molecular weight in the range of 500 to 6,000.

Claim 8

copolymers which are reaction products derived from heating a mixture of a siloxane copolymer consisting essentIally of SiO2 units and (CH3)3SiO1/2 units in which the ratio of SiO2 units to (CH3)3SiO1/2 units is in the range of 1:0.4 to 1:1.2, and a hydroxylated polyoxypropylene polymer, a hydroxylated polyoxyethylene polymer, or a hydroxylated polyoxypropylene-polyoxyethylene copolymer having a molecular weight in the range of 500 to 6,000.

Claim 9

copolymers which are reaction products derived from heating a mixture of a siloxane copolymer consisting essentially of SiO2 units and (CH3)3SiO1/2 units in which the ratio of SiO2 units to (CH3)3SiO1/2 units is in the range of 1:0.4 to 1:1.2, and a hydroxylated polyoxypropylene polymer, a hydroxylated polyoxyethylene polymer, or a hydroxylated polyoxypropylene-polyoxyethylene copolymer having a molecular weight in the range of 500 to 6,000, the fluid particles ranging in size from 0.1 to 20 microns and comprising from about 5 to 45 weight percent of the composite article.

Claim 10

copolymers which are reaction products derived from heating a mixture of a siloxane copolymer consisting essentially of SiO2 units and (CH3)3SiO1/2 units in which the ratio of SiO2 units to (CH3)3SiO1/2 units is in the range of 1:0.4 to 1:1.2, and a hydroxylated polyoxypropylene polymer, a hydroxylated polyoxyethylene polymer, or a hydroxylated polyoxypropylene-polyoxyethylene copolymer having a molecular weight in the range of 500 to 6,000, the fluid particles ranging in size from 0.1 to 20 microns and comprising from about 5 to 45 weight percent of the composite article.

Claim 11

A dispersion in accordance with claim 1 wherein the dispersing agent (c) is a copolymeric reaction product derived from heating a siloxane copolymer consisting essentially of SiO2 units and (CH3)3SiO1/2 units in which the ratio of SiO2 units to (CH3)3SiO1/2 units is in the range of 1:0.4 to 1:1.2, and a hydroxylated polyoxyalkylene polymer having a molecular weight in the range of 500 to 6,000, said polyoxyalkylene polymer being selected from the group consisting of hydroxylated polyoxypropylene polymers, hydroxylated polyoxyethylene polymers and polyoxypropylene-polyoxyethylene copolymers.

Claim 12

A dispersion in accordance with claim 2 wherein the reaction product is derived from heating said siloxane copolymer and a hydroxylated polyoxypropylene polymer having a molecular weight in the range of 500 to 6,000.

Claim 13

A dispersion in accordance with claim 1 wherein the fluid lubricant is an organopolysiloxane.

Claim 14

A dispersion in accordance with claim 4 wherein the organopolysiloxane lubricant is dimethylpolysiloxane.

Claim 15

A dispersion in accordance within claim 4 wherein the organopolysiloxane has a viscosity of not greater than 20,000 cs. at 25*C.

Claim 16

A dispersion in accordance within claim 1 which contains a solid inorganic particulate filler.

Claim 17

A dispersion in accordance within claim 7 wherein the filler comprises hydrated alumina.

Claim 18

A composite article comprising a cured epoxy resin matrix containing uniformly dispersed therein discrete fluid particles, the fluid consisting essentially of a mixture of about 30 to 95 weight percent of a fluid lubricant which is incompatible with the epoxy resin in its uncured state, said epoxy resin having an average of more than one 1,2-epoxide group per molecule, the remainder of the mixture being a siloxane copolymer selected from the group consisting of

Claim 19

A composite article comprising a cured epoxy resin matrix containing uniformly dispersed therein discrete fluid particles, the fluid consisting essentially of a mixture of about 30 to 95 weight percent of a fluid lubricant which is incompatible with the epoxy resin in its uncured state, said epoxy resin having an average of more than one 1,2-epoxide group per molecule, the remainder of the mixture being a siloxane copolymer selected from the group consisting of

Claim 20

A composite article in accordance with claim 9 wherein the fluid lubricant is an organopolysiloxane.

Claim 21

A composite article in accordance with claim 10 wherein the organopolysiloxane is dimethylpolysiloxane having a viscosity of not greater than 20,000 cs. at 25*C.

Claim 22

A composIte article in accordance with claim 9 which contains a solid inorganic filler.

Claim 23

A composite article in accordance with claim 12 wherein the filler comprises hydrated alumina.