High temperature thermobarrier compositions

Claim 2

A high heat-resistant thermobarrier composition, comprising: a blend having (a) about 100 parts by weight of an epoxy resin; (b) from about 5 to about 30 parts by weight of the boroxine having the formula ##STR11## where R is a group having from 1 to 18 carbon atoms; (c) from about 1 to about 10 parts by weight of a phenyl substituted alkyl alcohol, said alkyl alcohol having from 1 to 20 carbon atoms; and (d) a heat-resistant filler, the amount of said filler being sufficient to form a thixotropic blend.

Claim 3

A high heat-resistant thermobarrier composition according to claim 1, wherein said heat-resistant filler is selected from the group consisting of opaque materials, cloths or fabrics, microspheres, and combinations thereof; wherein said opaque material is selected from the group consisting of an inorganic compound in an amount from about 1 to about 80 percent by weight, carbon black or graphite in an amount of from 1 percent to about 30 percent by weight, and a silicone material in an amount of from about 1 percent to about 75 percent by weight; wherein said cloth or fabric filler is selected from the class consisting of ceramic, glass, polyaramid, or combinations thereof, the amount of said cloth or fabric filler ranging from about 50 to about 65 percent by weight; wherein said microspheres is selected from the group consisting of from about 25 percent to about 70 percent by weight of a ceramic, from about 5 percent to about 25 percent by weight of a glass, from about 5 percent to about 25 percent by weight of a phenolic, from about 5 percent to about 25 percent by weight of an inorganic silicate, and from about 5 percent to about 30 percent by weight of carbon or graphite; and wherein said percentage is based upon the total amount of said filler and said blend.

Claim 4

A high heat-resistant thermobarrier composition according to claim 2, wherein R of said boroxine is an alkyl having from 1 to 5 carbon atoms, wherein the amount of said boroxine compound ranges from about 8 to about 15 parts per 100 parts of said epoxy compound, and wherein said alkyl alcohol has from 1 to 10 carbon atoms, and wherein the amount of said alcohol ranges from about 1 to about 5 parts by weight per 100 parts of said epoxy.

Claim 5

A high heat-resistant thermobarrier composition according to claim 3, wherein said opaque inorganic filler is selected from the group consisting of aluminum oxide trihydrated, aluminum oxide trihydrated dispersions, ammonium bromide, ammonium fluoborate, ammonium orthophosphate, ammonium polyphosphate, ammonium sulfamate, antimony oxide, antimony oxide dispersions, antimony oxide, barium metaborate, barium borate, magnesium sulfate heptahydrate, molybdic oxide, molybdates, molybdenum complex, multi-metal complex, organic-inorganic additive, sodium antimonate, zinc borate, and zinc borate dispersions, wherein the amount of said inorganic filler ranges from about 10 percent to about 60 percent, wherein said opaque silicone filler is selected from the group consisting of silica dioxide, hydrated magnesium silicate, anhydrous alkali aluminum silicate, amorphous precipitated silica, crystalline quartz, microcrystalline quartz, diatomaceous silica, and fused vitrified silica, wherein the amount of said silica filler ranges from about 10 to about 60 percent, and wherein the amount of said carbon black or graphite opaque filler ranges from about 2 percent to about 20 percent; and wherein said cloth or fabric filler exists in an amount of from about 55 to about 60 percent.

Claim 6

A high heat-resistant thermobarrier composition according to claim 3, wherein said filler is said microspheres, and wherein the amount of said ceramic microspheres ranges from about 35 percent to about 60 percent, wherein the amount of said glass microspheres ranges from about 10 to about 25 percent, wherein the amount of said phenolic microspheres ranges from about 15 to about 20 percent, wherein the amount of said silicate microspheres ranges from about 10 to about 20 percent, and wherein the amount of said carbon or graphite microspheres ranges from about 10 to about 20 percent.

Claim 7

A high heat-resistant thermobarrier composition according to claim 4, wherein said boroxine is said trimethoxyboroxine, and wherein said alcohol is benzyl alcohol.

Claim 8

A high heat-resistant thermobarrier composition according to claim 5, wherein said boroxine is said trimethoxyboroxine, and wherein said alcohol is benzyl alcohol.

Claim 9

A high heat-resistant thermobarrier composition, comprising: a blend having (a) about 100 parts by weight of an epoxy resin; (b) from about 5 to about 30 parts by weight of a boroxine having the formula ##STR12## where R is a group having from 1 to 18 carbon atoms; (c) from about 1 to about 40 parts by weight of a phosphorus compound having the formula ##STR13## where R 3 is selected from the group consisting of hydrocarbon radicals having from 1 to 24 carbon atoms, halo-substituted organic radicals having from 1 to 24 carbon atoms, and multihalo-substituted organic radicals having from 1 to 24 carbon atoms, and where R 3 may be the same or different radicals; where R 4 is selected from the group consisting of all the radicals of R 3 , oxygen, and radicals of the formula: --O--R 6 , where R 6 is selected from the group consisting of all the radicals of R 3 , organo-phosphorus polymeric radicals, and organo-phosphorus esters; where R 5 is selected from the group consisting of hydrogen, hydroxy, oxygen, sulfur, halogen, or no radicals at all, and where Z is selected from the group consisting of oxygen, sulfur, or no radical at all; and (d) a heat-resistant filler, the amount of said filler being sufficient to form a thixotropic blend.

Claim 10

A high heat-resistant thermobarrier composition, comprising: a blend having (a) about 100 parts by weight of an epoxy resin; (b) from about 5 to about 30 parts by weight of a boroxine having the formula ##STR12## where R is a group having from 1 to 18 carbon atoms; (c) from about 1 to about 40 parts by weight of a phosphorus compound having the formula ##STR13## where R 3 is selected from the group consisting of hydrocarbon radicals having from 1 to 24 carbon atoms, halo-substituted organic radicals having from 1 to 24 carbon atoms, and multihalo-substituted organic radicals having from 1 to 24 carbon atoms, and where R 3 may be the same or different radicals; where R 4 is selected from the group consisting of all the radicals of R 3 , oxygen, and radicals of the formula: --O--R 6 , where R 6 is selected from the group consisting of all the radicals of R 3 , organo-phosphorus polymeric radicals, and organo-phosphorus esters; where R 5 is selected from the group consisting of hydrogen, hydroxy, oxygen, sulfur, halogen, or no radicals at all, and where Z is selected from the group consisting of oxygen, sulfur, or no radical at all; and (d) a heat-resistant filler, the amount of said filler being sufficient to form a thixotropic blend.

Claim 11

A high heat-resistant thermobarrier composition according to claim 8, wherein said phosphorus compound is a phosphite compound, and including from about 1 to about 10 parts by weight of a phenyl substituted alkyl alcohol, said alkyl alcohol having from 1 to 20 carbon atoms.

Claim 12

A high heat-resistant thermobarrier composition according to claim 9, wherein said heat-resistant filler is selected from the group consisting of opaque materials, cloths or fabrics, microspheres, and combinations thereof; wherein said opaque material is selected from the group consisting of an inorganic compound in an amount from about 1 to about 80 percent by weight, carbon black or graphite in an amount of from about 1 to about 30 percent, and a silicone material in an amount of from about 1 percent to about 75 percent by weight; wherein said cloth or fabric filler is selected from the class consisting of ceramic, glass, polyaramid, or combinations thereof, the amount of said cloth or fabric filler ranging from about 50 to about 65 percent by weight; wherein said microspheres is selected from the group consisting of from about 25 to about 70 percent by weight of a ceramic, from about 5 to about 25 percent by weight of a glass, from about 5 to about 25 percent by weight of a phenolic, from about 5 to about 25 percent by weight of an inorganic silicate, and from about 5 to about 30 percent by weight of carbon or graphite; and wherein said percentage is based upon the total amount of said filler and said blend.

Claim 13

A high heat-resistant thermobarrier composition according to claim 10, wherein said opaque inorganic filler is selected from the group consisting of aluminum oxide trihydrated, aluminum oxide trihydrated dispersions, ammonium bromide, ammonium fluorborate, ammonium orthophosphate, ammonium polyphosphate, ammonium sulfamate, antimony oxide, antimony oxide dispersions, antimony oxide transparent, barium metaborate, barium borate, magnesium sulfate heptahydrate, molybdic oxide, molybdates, molybdenum complex, multi-metal complex, organic-inorganic additive, sodium antimonate, zinc borate, and zinc borate dispersions, wherein the amount of said inorganic filler ranges from about 10 to about 60 percent, wherein said opaque silicone filler is selected from the group consisting of silica dioxide hydrated magnesium silicate, anhydrous alkali, alumina silicate, amorphous pyrogenic silica, amorphous precipitated silica, crystalline quartz, microcrystalline quartz, diatomaceous silica, and fused vitrified silica, wherein the amount of said silica filler ranges from about 10 to about 60 percent, and wherein the amount of said carbon black or graphite opaque filler ranges from about 2 percent to about 20 percent; and wherein said cloth or fabric filler exists in an amount of from about 55 percent to about 60 percent.

Claim 14

A high heat-resistant thermobarrier composition according to claim 10, wherein said filler is said microspheres, and wherein the amount of said ceramic microspheres ranges from about 35 to about 60 percent, wherein the amount of said glass microspheres ranges from about 10 to about 25 percent, wherein the amount of said phenolic microspheres ranges from about 15 to about 20 percent, wherein the amount of said silicate microspheres ranges from about 10 to about 20 percent, and wherein the amount of said carbon or graphite microspheres ranges from about 10 to about 20 percent.

Claim 15

A high heat-resistant thermobarrier composition according to claim 11, wherein R of said boroxine is an alkyl having from 1 to 5 carbon atoms, wherein the amount of said boroxine compound ranges from about 8 to about 15 parts per 100 parts of said epoxy compound, and wherein said alkyl alcohol has from 1 to 10 carbon atoms, and wherein the amount of said alcohol ranges from about 1 to about 5 parts by weight per 100 parts of said epoxy, wherein said phosphite compounds are selected from the group consisting of diphenyl phosphite, trisnonylphenyl phosphite, triphenyl phosphite, diphenylisooctyl phosphite, phenyl diisodecyl phosphite, diphenylisodecyl phosphite, and wherein the amount of said phosphite compound ranges from about 5 to about 40 parts by weight.

Claim 16

A high heat-resistant thermobarrier composition according to claim 13, wherein said boroxine is said trimethoxyboroxine, and wherein said alcohol is benzyl alcohol.

Claim 17

A high heat-resistant thermobarrier composition according to claim 12, wherein R of said boroxine is an alkyl having from 1 to 5 carbon atoms, wherein the amount of said boroxine compound ranges from about 8 to about 15 parts per 100 parts of said epoxy compound, and wherein said alkyl alcohol has from 1 to 10 carbon atoms, and wherein the amount of said alcohol ranges from about 1 to about 5 parts by weight per 100 parts of said epoxy, wherein said phosphite compounds are selected from the group consisting of diphenyl phosphite, trisnonylphenyl phosphite, triphenyl phosphite, diphenylisooctyl phosphite, phenyl diisodecyl phosphite, diphenylisodecyl phosphite, and wherein the amount of said phosphite compound ranges from about 5 to about 40 parts by weight.

Claim 18

A high heat-resistant thermobarrier composition according to claim 15, wherein said boroxine is said trimethoxyboroxine, and wherein said alcohol is benzyl alcohol.

Claim 19

A high heat-resistant thermobarrier composition according to claim 8, wherein said phosphorus compound is a phosphate compound, wherein said heat-resistant filler is selected from the group consisting of opaque materials, cloths or fabrics, microspheres, and combinations thereof, and wherein said opaque material is selected from the group consisting of an inorganic compound in an amount from about 1 to about 80 percent by weight, carbon black or graphite in an amount of from about 1 percent to about 30 percent by weight, and a silicone material in an amount of from about 1 percent to about 75 percent by weight; wherein said cloth or fabric filler is selected from the class consisting of ceramic, glass, polyaramid, or combinations thereof, the amount of said cloth or fabric filler ranging from about 50 to about 65 percent by weight; wherein said microspheres is selected from the group consisting of from about 25 percent to about 70 percent by weight of a ceramic, from about 5 percent to about 25 percent by weight of a glass, from about 5 percent to about 25 percent by weight of a phenolic, from about 5 percent to about 25 percent by weight of an inorganic silicate, and from about 5 percent to about 30 percent by weight of carbon or graphite; wherein said percentage is based upon the total amount of said filler and said blend.

Claim 20

A high heat-resistant thermobarrier composition according to claim 17, wherein said opaque inorganic filler is selected from the group consisting of aluminum oxide trihydrated, aluminum oxide trihydrated dispersions, ammonium bromide, ammonium fluoborate, ammonium orthophosphate, ammonium polyphosphate, ammonium sulfamate, antimony oxide, antimony oxide dispersions, antimony oxide transparent, barium metaborate, barium borate, magnesium sulfate heptahydrate, molybdic oxide, molybdates, molybdenum complex, multimetal complex, organic-inorganic additive, sodium antimonate, zinc borate, and zinc borate dispersions, wherein the amount of said inorganic filler ranges from about 10 to about 60 percent, wherein said opaque silicone filler is selected from the group consisting of silica dioxide, hydrated magnesium silicate, anhydrous alkali aluminum silicate, amorphous pyrogenic silica, amorphous precipitated silica, crystalline quartz, microcrystalline quartz, diatomaceous silica, and fused vitrified silica, wherein the amount of said silica filler ranges from about 10 to about 60 percent, and wherein the amount of said carbon black or graphite opaque filler ranges from about 2 percent to about 20 percent; wherein said cloth or fabric filler exists in an amount of from about 55 to about 60 percent.

Claim 21

A high heat-resistant thermobarrier composition according to claim 18, wherein R of said boroxine is an alkyl having from 1 to 5 carbon atoms, wherein the amount of said boroxine compound ranges from about 8 to about 15 parts per 100 parts of said epoxy compound, and wherein the amount of said phosphate compound ranges from about 5 to about 30 parts by weight per 100 parts of said epoxy resin, and wherein said phosphate compound is selected from the group consisting of tri(beta, beta' dichloroisopropyl)phosphate, tri(beta chloroethyl)phosphate, bis chloroethyl phosphate ester, a phosphate polymer of the formula ##STR14## where n is a number from 1 to 20, and combinations thereof.

Claim 22

A high heat-resistant thermobarrier composition according to claim 17, wherein said filler is said microspheres, and wherein the amount of said ceramic microspheres ranges from about 35 percent to about 60 percent, wherein the amount of said glass microspheres ranges from about 10 to about 25 percent, wherein the amount of said phenolic microspheres ranges from about 15 to about 20 percent, wherein the amount of said silicate microspheres ranges from about 10 percent to about 20 percent, and wherein the amount of said carbon or graphite microspheres ranges from about 10 percent to about 20 percent.

Claim 23

A high heat-resistant thermobarrier composition according to claim 19, wherein said boroxine is trimethoxyboroxine.

Claim 24

A high heat-resistant thermobarrier composition according to claim 20, wherein R of said boroxine is an alkyl having from 1 to 5 carbon atoms, wherein the amount of said boroxine compound ranges from about 8 to about 15 parts per 100 parts of said epoxy compound, and wherein the amount of said phosphate compound ranges from about 5 to about 30 parts by weight per 100 parts of said epoxy resin, and wherein said phosphate compound is selected from the group consisting of tri(beta, beta' dichloroisopropyl)phosphate, tri(beta chloroethyl)phosphate, bis chloroethyl phosphate ester, a phosphate polymer of the formula: ##STR15## where n is a number from 1 to 20, and combinations thereof.

Claim 25

A high heat-resistant thermobarrier composition according to claim 22, wherein said boroxine is trimethoxyboroxine.