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Silicon dioxide-based anti-adhesion agent used for polyolefin thin film and preparation method thereof

A technology of silica and anti-blocking agent, which is applied in the field of silica-based anti-blocking agent for polyolefin film and its preparation, can solve the problem of affecting the printability, heat-sealability and color of plastic film, and affecting the safety of plastic film food packaging materials. It can improve the anti-blocking effect, enhance the anti-blocking effect and improve the compatibility.

Active Publication Date: 2016-08-31
广州赫尔普化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the processing of these organic anti-blocking agents, the precipitates are attached to the surface of the plastic film, which reduces the gloss and transparency of the plastic film, affects the printability, heat sealability and color of the plastic film, and also affects the use of the plastic film as a food packaging material. security

Method used

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  • Silicon dioxide-based anti-adhesion agent used for polyolefin thin film and preparation method thereof
  • Silicon dioxide-based anti-adhesion agent used for polyolefin thin film and preparation method thereof

Examples

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Effect test

Embodiment 1

[0024] A kind of preparation method of silicon dioxide-based anti-blocking agent for polyolefin film, wherein, comprises the following steps:

[0025] Step 1: Mix 18g (18wt%) distilled water and 28g (28wt%) absolute ethanol evenly, add 16g (16wt%) ammonia water therein, and stir at 25°C for 20min. A mixed solution of 10 g (10 wt %) of ethyl tetrasilicate and 28 g (28 wt %) of absolute ethanol was slowly added dropwise to the system under stirring. After the dropwise addition, react at 25°C for 4h. The obtained solution is separated by a centrifuge, and the milky white solution in the upper layer obtained is SiO 2 Sol. The upper layer solution was separated and dried to obtain SiO 2 particles. In this step, tetraethyl orthosilicate undergoes hydrolysis reaction, and the reaction process is as follows: figure 1 shown.

[0026] Step 2, the SiO obtained above with 10g 2 The solid particles were added to a mixture of 0.5g CTAB, 20g n-octanol and 70g water, and stirred by a s...

Embodiment 2

[0029] A kind of preparation method of silicon dioxide-based anti-blocking agent for polyolefin film, wherein, comprises the following steps:

[0030]Step 1: Mix 22g (22wt%) distilled water and 22.5g (22.5wt%) absolute ethanol evenly, add 20g (20wt%) ammonia water to it, and stir at 25°C for 20min. A mixed solution of 13 g (13 wt %) of tetraethyl orthosilicate and 22.5 g (22.5 wt %) of absolute ethanol was slowly added dropwise to the system under stirring. After the dropwise addition, react at 25°C for 6h. The obtained solution is separated by a centrifuge, and the milky white solution in the upper layer obtained is SiO 2 Sol. The upper layer solution was separated and dried to obtain SiO 2 particles. In this step, tetraethyl orthosilicate undergoes hydrolysis reaction, and the reaction process is as follows: figure 1 shown.

[0031] Step 2, the SiO obtained above with 10g 2 The solid particles were added to a mixture of 0.6 g of SDS, 35 g of dodecane and 55 g of water...

Embodiment 3

[0034] A kind of preparation method of silicon dioxide-based anti-blocking agent for polyolefin film, wherein, comprises the following steps:

[0035] Step 1: Mix 25g (25wt%) distilled water and 25g (25wt%) absolute ethanol evenly, add 10g (10wt%) ammonia water therein, and stir at 25°C for 20min. A mixed solution of 15 g (15 wt %) of ethyl tetrasilicate and 25 g (25 wt %) of absolute ethanol was slowly added dropwise to the system under stirring. After the dropwise addition, react at 25°C for 8h. The obtained solution is separated by a centrifuge, and the milky white solution in the upper layer obtained is SiO 2 Sol. The upper layer solution was separated and dried to obtain SiO 2 particles. In this step, tetraethyl orthosilicate undergoes hydrolysis reaction, and the reaction process is as follows: figure 1 shown.

[0036] Step 2, the SiO obtained above with 10g 2 The solid particles were added to a mixture of 0.8g SDBS, 50g hexadecane and 40g water, and stirred by a ...

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Abstract

The invention relates to a silicon dioxide-based anti-adhesion agent used for a polyolefin thin film and a preparation method thereof. The silicon dioxide-based anti-adhesion agent is suitable for plastic thin film production enterprises. The preparation method includes the following steps of: 1) preparing silicon dioxide sol from tetraethyl orthosilicate under alkaline conditions; 2) adding a surfactant and a proper oil phase organic substance, and stirring the mixture to prepare a micelle with silicon dioxide as a shell layer; 3) adding trimethoxy silane containing an R group and a catalyst to the micelle with the silicon dioxide as the shell layer, and stirring the mixture to prepare silicon dioxide-based microspheres at a certain temperature, wherein the surfaces of silicon dioxide are modified by silane; and 4) drying the microspheres to remove the oil phase to obtain silicon dioxide hollow microspheres. The silicon dioxide-based anti-adhesion agent is a compound having definite structural and molecular formulas and molecular weight, but is a hollow microsphere which has a hierarchical pore structure and is based on silicon dioxide. The anti-adhesion agent can reinforce a plastic thin film and improves creep resistance, wherein a large quantity of micro projections and gaps are formed on the surface of the thin film, thereby increasing roughness of the thin film, reducing friction coefficient and preventing adhesion of the thin films.

Description

technical field [0001] The invention relates to the technical field of preparation of additives in polymer materials, in particular to a silicon dioxide-based anti-blocking agent for polyolefin films and a preparation method. Background technique [0002] Plastic and plastic products have greatly facilitated human life and production in the course of nearly a hundred years of development. As an important member of the plastic family, plastic film plays a pivotal role in the development of modernization. Since its development in the 1940s, it has become an important downstream product of the plastics industry. Plastic films are widely used in packaging, agriculture, electronics industry and other fields. Among them, the largest application field of plastic film is the packaging market. There are many kinds of plastic films, from the raw materials used, plastic films mainly include polypropylene (PP) film, polyethylene (PE) film, polyamide (PA) film, polyvinyl chloride (PVC...

Claims

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Application Information

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IPC IPC(8): C08K7/26C08K9/04C08K9/06
CPCC08K7/26C08K9/04C08K9/06
Inventor 张官云邢玉秀肖兴
Owner 广州赫尔普化工有限公司
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