Inorganic particles with improved flowability
A technology of inorganic particles and flow additives, applied in inorganic pigment treatment, dyed polymer organic compound treatment, coating and other directions, can solve the problem of low flowability of inorganic particles
Inactive Publication Date: 2017-03-01
DOW GLOBAL TECH LLC +1
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- Summary
- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
Therefore, inorganic particles tend to have low fluidity, which is not good for most industrial applications
Method used
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[0034] I. Raw materials
[0035]
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Abstract
It provides spray-dried powders comprising from 0.1% to 25% a hydrophobic polymer, from 75% to 99.9% inorganic particles, and less than 3% a dispersant. The Tg of the hydrophobic polymer is less than 105DEG C, the average particle size of the inorganic particles is from 5nm to 100um, and the average particle size of the spray-dried powders is from 1(mu)m to 400(mu)m. The hydrophobic polymer comprises, as polymerization units, an ethylenically unsaturated nonionic monomer. It further provides a process for the preparation of the spray-dried powders comprising (a) preparing a solution comprising the hydrophobic polymer, the inorganic particles, and the dispersant; and (b) adding the solution into a spray dryer and preparing the spray-dried powders.
Description
technical field [0001] The present invention relates to inorganic particles with improved fluidity. Specifically, the present invention relates to composites of inorganic particles and polymer particles prepared by spray drying. Background technique [0002] Inorganic particles are widely used in industries such as coating and 3D printing. Inorganic particles have the ability to adhere to each other and tend to bond together. Therefore, inorganic particles tend to have low fluidity, which is not beneficial for most industrial applications. The cohesion of the particles is even considerable in inorganic particles having a particle size below 30 μm. [0003] It would be desirable in industry to provide treated inorganic particles with improved flow properties. Contents of the invention [0004] The present invention provides a spray-dried powder comprising 0.1 to 25 dry weight percent of a hydrophobic polymer, 75 to 99.9 dry weight percent of inorganic particles, and les...
Claims
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IPC IPC(8): C01G23/04C01G9/02C01F7/02C11D11/02C09D7/45C09D7/61
CPCC09C3/10C08K9/08C09D7/61C09D7/45C09C3/043C09D133/12
Inventor 孙彤Y·刘Y·黄王涛
Owner DOW GLOBAL TECH LLC