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Ultrahigh-molecular weight modified polysiloxane, preparation method thereof, and application thereof in plastic processing

An ultra-high molecular weight, polysiloxane technology, applied in the field of polymer materials, can solve the problems of low reactivity, poor compatibility, easy precipitation, etc.

Active Publication Date: 2019-06-14
ZHEJIANG XINAN CHEM INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, polysiloxane also has disadvantages such as poor compatibility with other polyolefin base materials, low reactivity, and easy precipitation.

Method used

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  • Ultrahigh-molecular weight modified polysiloxane, preparation method thereof, and application thereof in plastic processing
  • Ultrahigh-molecular weight modified polysiloxane, preparation method thereof, and application thereof in plastic processing
  • Ultrahigh-molecular weight modified polysiloxane, preparation method thereof, and application thereof in plastic processing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111] Embodiment 1 Long-chain alkyl modified ultrahigh molecular weight modified polysiloxane

[0112] (1) Preparation of long chain hydrocarbon alkyl modified silane

[0113] Add 1-tetradecene dropwise to the toluene mixed solution of methyldichlorosilane and platinum catalyst, the platinum catalyst is Speier catalyst, and the amount of catalyst is 1 / 10,000 of the total mass of reactants, calculated by platinum atomic mass, 1-10 The molar ratio of tetraene to methyldichlorosilane was 1.1:1, the reaction temperature was 80°C, and the reaction was carried out for 4 hours. After the reaction, the unreacted raw materials and solvent were evaporated to obtain tetradecylmethyldichlorosilane.

[0114] (2) Preparation of long-chain alkane-based modified hydroxyl-terminated silicone oil

[0115] After mixing 1 part of tetradecanemethyldichlorosilane and 3 parts of dimethyldichlorosilane uniformly prepared in the above steps, they were added dropwise to the dichloromethane suspension...

Embodiment 2

[0120] Embodiment 2 long-chain alkane group and vinyl modified ultrahigh molecular weight polysiloxane

[0121] (1) Preparation of long-chain alkane-based and vinyl-modified hydroxyl-terminated silicone oils

[0122] Repeat the step (1) of Example 1, and after mixing 1 part of tetradecanemethyldichlorosilane, 3 parts of dimethyldichlorosilane and 1 part of methylvinyldichlorosilane, dropwise add In the dichloromethane suspension containing 5 parts of sodium bicarbonate, the temperature is kept at 30°C. After the hydrochloric acid is removed, the hydrolysis reaction is completed, and the sodium chloride and unreacted sodium bicarbonate are removed by filtration, and the dichloromethane is recovered to obtain ten Tetraalkane- and vinyl-modified hydroxyl-terminated silicone oil with a viscosity of 80cSt / 25°C and a yield of 75%.

[0123] (2) Preparation of long-chain alkane-based, vinyl-modified ultra-high molecular weight polysiloxane

[0124] Mix 1 part of tetradecane-based an...

Embodiment 3

[0125] Example 3 Long-chain alkane group, long-chain fluorocarbon group, vinyl modified ultra-high molecular weight polysiloxane

[0126] (1) Preparation of long-chain fluorocarbon-based modified silane

[0127] Add perfluorohexylethylene dropwise to the toluene mixed solution of methyldichlorosilane and platinum catalyst. The platinum catalyst is a Speier catalyst. Calculated by platinum atomic mass, the amount of catalyst used is 1 / 10,000 of the total mass of reactants. Perfluorohexylethylene The molar ratio to methyldichlorosilane was 1.1:1, the reaction temperature was 80°C, and the reaction was carried out for 5 hours. After the reaction, unreacted raw materials and solvents were evaporated to obtain perfluorohexylmethyldichlorosilane.

[0128] (2) Preparation of long-chain alkane group, long-chain fluorovinyl modified hydroxyl-terminated silicone oil

[0129] Step (1) of Example 1 was repeated, and 1 part of tetradecylmethyldichlorosilane, 1 part of perfluorohexylmethyl...

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Abstract

The present invention provides an ultrahigh-molecular weight modified polysiloxane having a structure represented by formula I. The formula I is shown in the description; and in the formula I, R1 is -OH, -CH=CH2 or CH3, R2 is -CaH2a-1, R3 is -C2H4CnF2n+1, R4 is -CH=CH2, a is equal to or more than 6 and equal to or less than 18, n is equal to or more than 1 and equal to or less than 8, m1 is more than 0, m2 is equal to or more than 0, m3 is equal to or more than 0, m4 is equal to or more than 0, m2, m3 and m4 cannot be zero at the same time, and the value of (m1 + m2 + m3 + m4) is equal to or more than 13500. The preparation method greatly improves the dispersibility of the ultrahigh-molecular weight modified polysiloxane in the polyolefin, and improves the scratch resistance, the surface smoothness, the mechanical properties and the heat resistance of polyolefin. The ultrahigh-molecular weight polysiloxane structure obtained in the invention has the advantages of strong designability,and easiness in stepless regulation of the performances of the ultrahigh molecular weight polysiloxane. The invention also provides a preparation method of the ultrahigh-molecular weight modified polysiloxane, and an application of the ultrahigh-molecular weight modified polysiloxane in plastic processing.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to an ultrahigh molecular weight modified polysiloxane, its preparation method and its application in plastic processing. Background technique [0002] Ultra-high molecular weight polysiloxane generally refers to linear polyorganosiloxane with molecular weight above 1000000g / mol. In the processing of thermoplastic resin products, it can improve the wear resistance of products, reduce the wear of products, and improve the surface finish and surface quality. Feel, increase the flow of resin melt, improve melt fracture, improve the dispersibility of toner or filler, improve the release of plastics in high-temperature and complex film blanks, and ultra-high molecular weight polysiloxane does not affect the plastic products. Subsequent processes such as spraying or secondary bonding, therefore, ultra-high molecular weight polysiloxane has broad application prospects...

Claims

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Application Information

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IPC IPC(8): C08G77/44C08G77/04C08G77/20C08G77/24C08G77/08C08L23/12C08L83/10C08K3/34
Inventor 郑智刘继陈阳
Owner ZHEJIANG XINAN CHEM INDAL GROUP
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