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High aspect boron nitride, methods, and composition containing same

A composition, boron nitride technology, applied to boron nitride with high aspect ratio, can solve the problems of increasing the cost of composite materials, limiting h-BN, affecting processing and mechanical properties, etc.

Inactive Publication Date: 2016-11-09
MOMENTIVE PERFORMANCE MATERIALS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such high loading of these expensive fillers increases the cost of the composite and also adversely affects processing and mechanical properties
These properties limit the adoption of h-BN in niche applications

Method used

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  • High aspect boron nitride, methods, and composition containing same
  • High aspect boron nitride, methods, and composition containing same
  • High aspect boron nitride, methods, and composition containing same

Examples

Experimental program
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Embodiment

[0075]In one example, h-BN was exfoliated in a suitable carrier using a 3-roll mill: hBN with an average crystal size of 50 microns was mixed with various carriers. Any suitable carrier or combination of carriers selected from the family of substrates, solvents, surfactants, additives that provide beneficial stiction to the boron nitride surface can be chosen. An organic material, an inorganic material, or a combination of two or more thereof may be selected. In this example, honey, cornstarch in water, poly-2-ethyl-2-oxazoline in water and polyvinyl acetate in water were used. hBN was first mixed with solvents at different loadings in a centrifugal mixer to obtain a homogeneous dispersion, and then processed through a 3-roll mill. The 3-roll mill was run at a maximum speed of 400 RPM with an inter-roll distance of 15 microns. Run at least one 3-roll mill, but as many as and including many times. The resulting exfoliated BN is then ashed to remove the support (organic conte...

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Abstract

Provided is a multi-functional composition including high aspect boron nitride particles providing improved properties such as thermal conductivity, electrical insulation, barrier to moisture, vapor, and gasses, lubrication, friction modification, optical properties, suspension stability, and a system and method for forming such compositions. The high boron nitride particles have an average aspect ratio greater than 300. The multifunctional composition may comprise of a polymer material, fluids, metals, ceramics, glasses, other non-BN fillers and the high aspect ratio boron nitride. Also provided are methods for making such boron nitride particles and compositions.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Application No. 61 / 923,974, filed January 6, 2014, entitled "High Aspect Ratio Boron Nitride, Methods and Compositions Containing Said High Aspect Ratio Boron Nitride" , the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present subject matter provides high aspect ratio boron nitride particles, compositions containing said high aspect ratio boron nitride particles, and methods for producing such particles and compositions. The present subject matter also provides methods for forming multifunctional compositions comprising tall long-diameter boron nitride flakes having properties such as, but not limited to, thermal conductivity, electrical insulation, gas / moisture barrier, optical Properties of materials, lubrication / friction modification, crystal nucleation, etc. Background technique [0004] Thermal managemen...

Claims

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Application Information

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IPC IPC(8): C04B35/583C09K5/14
CPCC04B35/583C09K5/14C04B35/80C04B2235/386C04B2235/5292C04B2235/5296C04B2235/5409C04B2235/5436C04B2235/723C04B2235/767C22C29/16C22C32/0068C01P2004/03C01P2004/54C01P2004/62C01P2006/12C01B35/146C09K5/10H01B3/02C01B21/0648C01B21/064C10N2020/06C01P2004/61C08K3/38C08K2003/385C09D1/00C09D5/084C10M125/26C10M2201/087
Inventor 瞿浩阿南德·穆鲁加亚向北钱德拉谢卡尔·拉曼林冈颐
Owner MOMENTIVE PERFORMANCE MATERIALS INC
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