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US 4,391,924 AGranted
High temperature thermobarrier compositions
AssigneeGoodyear Aerospace Corporation
InventorJohn R. Uram, Jr.
Life of this patent
Estimating the term…
Abstract
High temperature-resistant thermobarriers have a filler therein. The filler can be an opaque thermobarrier material, a fabric or cloth such that a laminated thermobarrier is formed, or preformed bubbles of glass, ceramic or plastic such that a syntactic foam thermobarrier is formed. The thermobarrier contains a boroxine compound therein as well as epoxy resins and various phosphorus compounds and/or aromatic alcohols. Generally, the syntactic foam thermobarriers give the best heat protection.
Claims23
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.
3 more elements
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.sub.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.sub.3 may be the same or different radicals;
- where R.sub.4 is selected from the group consisting of all the radicals of R.sub.3, oxygen, and radicals of the formula:
- --O--R.sub.6, where R.sub.6 is selected from the group consisting of all the radicals of R.sub.3, organo-phosphorus polymeric radicals, and organo-phosphorus esters;
- where R.sub.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.
7 more elements
Dependencies are inferred from the claim text.