Enhanced boron nitride composition and compositions made therewith
AssigneeGeneral Electric Company
InventorsHong Zhong, Eric Thaler
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Abstract
A boron nitride composition having its surface treated with a coating layer comprising at least an organosilicon compound. In one embodiment, the boron nitride powder surface is first treated by either a calcination process, or by coating with at least an inorganic compound for the surface to have a plurality of reactive sites containing at least a functional group that is reactive to at least one functional group of the organosilicon compound.
Claims20
A boron nitride composition comprising boron nitride powder, the boron nitride powder having its surface treated with at least an organosilicon compound having a formula selected from:
- a. (RR′SiO-)n, where R, R′ are the same or different and selected from the group of H, alkyl, aryl and substituted aryl;
- n has a value ranging from 3-16 for cyclic compounds and 2 to 1 million for linear compounds;
- and
- b. NHn(SiR1R2R3)3-n where R1, R2, R3 is a hydrocarbyl group or H, n is 1 or 2.
A polymer composite comprising a polymer matrix selected from the group consisting of melt-processable polymers, liquid polymer compositions, phenolics, epoxies, silicone resins, liquid crystal polymer, polyesters, polyamides;
- polyimides;
- polyphthalamides;
- a polyphenylene sulfide;
- a polycarbonate;
- a polyetheretherketone;
- apolyaryletherketone;
- a polyphenylene oxide, and mixtures thereof, and a filler material comprising particles of boron nitride, the boron nitride having its surface treated with at least an organosilicon compound selected from the group of siloxanes and silazanes, and wherein the coating compound adheres to at least 10% of the surface of the boron nitride.
A method for producing boron nitride powder, comprising the steps of:
- introducing a plurality of reactive sites on at least a portion of the boron nitride;
- coating the boron nitride with at least an organosilicon compound selected from the group of siloxanes and silazanes, wherein the organosilicon compound having at least a functional group that is reactive to at least one functional group of the final coating layer.
Dependencies are inferred from the claim text.