Inorganic-organic carrier polysiloxane particle and preparation method thereof

A technology of polysiloxane and organic carrier, which is applied in the field of organic carrier-free polysiloxane particles and its preparation, can solve the problems of limited application of boric acid, restrictions on use and promotion, and achieve improved surface smoothness and improved processing Fluidity, effect of improving wear and scratch resistance

Active Publication Date: 2020-12-04
CHENGDU SILIKE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in June 2010, the European Chemicals Agency (ECHA) included boric acid in the REACH Substances of Very High Concern (SVHC) list, which further restricted the application of boric acid, which in turn restricted the use and promotion of this method.

Method used

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  • Inorganic-organic carrier polysiloxane particle and preparation method thereof
  • Inorganic-organic carrier polysiloxane particle and preparation method thereof
  • Inorganic-organic carrier polysiloxane particle and preparation method thereof

Examples

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preparation example Construction

[0018] The invention provides a method for preparing polysiloxane particles without an organic carrier, comprising the steps of: S1. reacting and mixing polysiloxane, white carbon black, grafting agent and catalyst A in a kneader or internal mixer 0.5-3h, prepare a high-viscosity polysiloxane composition; the polysiloxane contains 0.02%-0.2% vinyl; S2. The high-viscosity polysiloxane composition and filler prepared in step S1 Melt mixing and extrusion granulation to prepare organic carrier-free polysiloxane granules.

[0019] In the present invention, by melting and mixing polysiloxane containing vinyl, white carbon black, grafting agent and catalyst A, silicon hydrogen can be generated between white carbon black containing a large number of hydrogen bonds on the surface and polysiloxane containing vinyl Addition reaction, so that silica is grafted on the surface of polysiloxane, at the same time, polysiloxane itself undergoes a chain extension reaction, under the dual effects...

Embodiment 1

[0038] A method for preparing organic carrier-free polysiloxane particles, comprising the steps of:

[0039] S1. Set the viscosity to 5×10 6 mPa·S, 100 parts of linear polysiloxane with a vinyl content of 0.12%, and a specific surface area of ​​180m 2 10 parts / g of precipitated superfine white carbon black, 0.005 parts of hydrogen-containing siloxane containing 0.35% hydrogen and 1 part of Pt-containing catalyst A with a Pt content of 500 ppm, reacted and mixed in an internal mixer at 150 ° C for 2 hours to prepare Obtaining the high viscosity polysiloxane composition is denoted as A;

[0040] S2. The specific surface area of ​​the high-viscosity polysiloxane composition A prepared in step S1 and 50 parts treated by the silane coupling agent is 180m 2 / g of precipitated silica, added to the kneader and mixed for 3 hours at 150°C; then the mixed material was fed into a reciprocating single-screw extruder through a double-cone extruder at 150°C, and granulated by the air-coole...

Embodiment 2

[0042] A method for preparing organic carrier-free polysiloxane particles, the difference from Example 1 is:

[0043] The white carbon black in step S1 is replaced with modified white carbon black A, and the preparation method of modified white carbon black A comprises: the specific surface area is 180m 2 It is prepared by kneading 100 parts of precipitated superfine white carbon black and 3 parts of vinyltrimethoxysilane per g in a kneader at 150°C.

[0044] The polysiloxane particles prepared in step S2 of this embodiment are designated as SK-2.

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Abstract

The invention belongs to the field of high polymer materials, and provides a preparation method of inorganic-organic carrier polysiloxane particles. The preparation method comprises the steps of S1, reacting and mixing polysiloxane, white carbon black, a grafting agent and a catalyst A in a kneading machine or an internal mixer to prepare a high viscosity polysiloxane composition, wherein the polysiloxane contains 0.02% to 0.2% of vinyl; and S2, mixing the high-viscosity polysiloxane composition prepared in the step S1 with a filler in the kneading machine or the internal mixer, and carrying out extrusion granulation to prepare the inorganic-organic carrier polysiloxane particles. The method is simple in technological process, safe and easy in raw material production and excellent in product performance, and has good application and popularization prospects. The invention also provides the inorganic-organic carrier polysiloxane particles prepared by the method, which are almost suitable for processing all thermoplastic resins, can improve the processing fluidity of the thermoplastic resins, and can improve the surface smoothness of products, reduce the surface friction coefficient,improve the wear resistance and scratch resistance and the like.

Description

technical field [0001] The invention belongs to the field of macromolecular materials, and in particular relates to an organic carrier-free polysiloxane particle and a preparation method thereof. Background technique [0002] Silicone material is a kind of special polymer material with semi-organic and semi-inorganic structure, which has unique and excellent properties. Silicone lubricant is a kind of plastic lubricant, including silicone masterbatch and silicone powder, which has a wide range of applications in plastic modification, pipes, films, automotive interiors, wires and cables, etc. [0003] The MB50 lubricant series products first launched by Dow Corning in the United States are silicone masterbatches with ultra-high molecular weight silicone as the lubricating active ingredient and different resins as the carrier. The amount used in plastic processing is generally about 0.2% to 5%. . The emergence of silicone masterbatch overcomes the shortcomings of traditional...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L87/00C08K9/06C08K7/26C08K9/04C08K3/34C08G83/00
CPCC08K9/06C08K7/26C08K9/04C08K3/34C08G83/001C08K2201/006C08L87/005
Inventor 徐龙平何雅僖雷霆王伟杰
Owner CHENGDU SILIKE TECH
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