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Bio-based polysiloxane scratch-resistant auxiliary agent and preparation method thereof, and scratch-resistant composite material

A polysiloxane, bio-based technology, applied in the field of anti-scratch additives, can solve the problems of violating green development, non-renewable non-green resources, etc.

Active Publication Date: 2021-06-25
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the new polysiloxane has a significant effect on the scratch resistance of polypropylene, the reactant of the new scratch resistance agent is a non-renewable non-green resource, which goes against the trend of green development

Method used

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  • Bio-based polysiloxane scratch-resistant auxiliary agent and preparation method thereof, and scratch-resistant composite material
  • Bio-based polysiloxane scratch-resistant auxiliary agent and preparation method thereof, and scratch-resistant composite material
  • Bio-based polysiloxane scratch-resistant auxiliary agent and preparation method thereof, and scratch-resistant composite material

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Experimental program
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preparation example Construction

[0047] The present invention provides a preparation method of the bio-based polysiloxane anti-scratch additive described in the technical solution, comprising the following steps:

[0048] (1) mix hydrogenated cardanol, basic catalyst, organic solvent and halogenated olefin, and carry out substitution reaction to obtain intermediate;

[0049] (2) Mix the intermediate obtained in the step (1) with the catalyst, toluene and low-hydrogen polysiloxane, and carry out a hydrosilylation reaction to obtain the bio-based polysiloxane of the formula (I) structure Scratch-resistant additives;

[0050] Alternatively, the unhydrogenated cardanol is mixed with the catalyst, toluene and low-hydrogen-containing polysiloxane for hydrosilylation reaction to obtain the bio-based polysiloxane anti-scratch additive with the structure of formula (II).

[0051] The invention mixes hydrogenated cardanol, a basic catalyst, an organic solvent and a halogenated olefin, and performs a substitution react...

Embodiment 1

[0113] (1) Add the weighed cardanol derivative 3-pentadecylphenol (10mmol, 3.0451g) into 50mL of absolute ethanol solution, stir to dissolve it, and obtain the first reaction solution; / L KOH solution was added to the first reaction solution at a rate of 0.2-0.5mL / s; the bromopropene (10mmol, 0.86g) solution was gradually added dropwise to the first reaction solution at a rate of 0.06-0.12mL / s with a syringe solution to obtain a second reaction solution; heat the second reaction solution to reflux in an oil bath, set the temperature to 78° C., and react for 8 hours; use ethyl acetate to precipitate KBr generated in the reacted system, and filter to obtain the filtrate, set The temperature is 50°C for rotary steaming, the rotary steaming step is repeated twice to remove KBr; the wet method is passed through the column, and the eluent is prepared according to the ratio of petroleum ether: ethyl acetate = 10:1 ~ 20:1, and the column is purified The intermediate; the purified inte...

Embodiment 2

[0124] The difference from Example 1 is that the cardanol derivatives in step (1) are unhydrogenated cardanol; wherein, the unhydrogenated cardanol is a mixture, that is, four kinds of phenols composed of b=0,1,2,3 Composed of mixed phenols. The ratio of the amount of unhydrogenated cardanol, alkaline catalyst and propylene bromide is 1:1:1; the obtained intermediate is a mixed olefin composed of four cardanol groups, wherein the structural formula of the cardanol group mixed olefin is as follows Shown in formula (VII):

[0125]

[0126] b=0,1,2,3 in the formula (VII).

[0127] Step (2) The ratio of the amount of intermediate to chloroplatinic acid and low hydrogen-containing polysiloxane is 12:5.80×10 -7 :12. All the other operating steps are the same as in Example 1.

[0128] The structural formula of the bio-based-PMHS that step (2) obtains is shown in formula (VIII):

[0129]

[0130] Wherein, in formula (VIII), b=0,1,2,3.

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Abstract

The invention relates to the technical field of scratch resistance, and provides a bio-based polysiloxane scratch-resistant auxiliary agent and a preparation method thereof, and a scratch-resistant composite material. A green and renewable bio-based material derivative is utilized to carry out modification grafting on low-hydrogen-content polysiloxane, and the bio-based polysiloxane scratch-resistant auxiliary agent is designed and synthesized. When the bio-based polysiloxane scratch-resistant auxiliary agent is used for a scratch-resistant composite material, a main chain of the bio-based polysiloxane scratch-resistant auxiliary agent can migrate to the surface of the composite material to form a layer of lubricating film in a polymer base material forming process, so that the scratch resistance of the composite material is improved; and the side chain of the rigid benzene ring structure can endow the polymer base material with certain hardness and higher thermal performance, so that the scratch resistance and the separation-out viscosity resistance of the composite material are further improved. Experimental results show that the bio-based polysiloxane scratch-resistant auxiliary agent provided by the invention can obviously improve the scratch resistance of a polymer base material; meanwhile, a step curve test further proves that the scratch resistance of the polymer base material is obviously improved.

Description

technical field [0001] The invention relates to the technical field of scratch-resistant additives, in particular to a bio-based polysiloxane scratch-resistant additive, a preparation method thereof, and a scratch-resistant composite material. Background technique [0002] With the wide application of polymer materials in the fields of packaging, automobiles and architectural decoration, the requirements for their surface quality are getting higher and higher. In the process of transportation, pick and place, assembly and use, the surface of the material is easily scratched by hard or sharp objects, causing cracks or brittle damage on the surface, thereby reducing the aesthetics of the product; at the same time, the scratches formed on the surface of the product are also It is easy to form stress concentration, reduce the performance of the material, and even cause the function of the product to fail. [0003] At present, scholars at home and abroad have done a lot of resea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/38C08L23/12C08L69/00C08L77/00C08L33/12C08L55/02C08L83/06C08L83/04
CPCC08G77/38C08L23/12C08L69/00C08L77/00C08L33/12C08L55/02C08L2201/08C08G77/80C08L83/06C08L83/04
Inventor 冯建湘彭思梅刘跃军罗林园吴任钊
Owner HUNAN UNIV OF TECH
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