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Preparation method of modified material for PVC

A modified material and modified technology, applied in the field of plastic processing aids, can solve the problems of high cost and large production gap, and achieve the effects of improving reinforcement performance, strong positive electricity, and improving impact resistance.

Pending Publication Date: 2022-04-08
常州市五洲环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As an excellent impact modifier, ACR has been widely used in the PVC industry, but the cost is high and there is a large gap in domestic production

Method used

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  • Preparation method of modified material for PVC
  • Preparation method of modified material for PVC

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of modified material for PVC, concrete steps are as follows:

[0029] S1: on nano-SiO 2 Into the surface treatment

[0030] nano-SiO 2 Powder added to silane coupling agent (butadienyltriethoxysilane, 1.0% nano-SiO 2 ) in the dilute alcohol aqueous solution, after fully mixing and stirring for 30 minutes, vacuum drying to obtain modified nano-SiO 2 ;

[0031] S2: Configure seed emulsion

[0032] A certain amount of nano-SiO 2 dispersed in deionized water (nano-SiO 2 The mass ratio to deionized water is 3:100), after pre-dispersion by ultrasonic dispersion and mechanical stirring for 35min, then add emulsifier (sodium dodecylbenzenesulfonate, 5% nano-SiO 2 ) After dispersing for 15 minutes, adjust the pH value to 9-10 with 5% sodium hydroxide solution, and then disperse for 30-40 minutes with ultrasonic high-speed stirring to obtain seed latex;

[0033] S3: Preparation of core-shell modification additives

[0034] Add the seed latex obtain...

Embodiment 2

[0036] The preparation method of modified material for PVC, concrete steps are as follows:

[0037] S1: on nano-SiO 2 Into the surface treatment

[0038] nano-SiO 2 Powder added to silane coupling agent (butadienyltriethoxysilane, 0.5% nano-SiO 2 ) in the dilute alcohol aqueous solution, after fully mixing and stirring for 30 minutes, vacuum drying to obtain modified nano-SiO 2 ;

[0039] S2: Configure seed emulsion

[0040] A certain amount of nano-SiO 2 dispersed in deionized water (nano-SiO 2 The mass ratio to deionized water is 6:100), after pre-dispersion by ultrasonic dispersion and mechanical stirring for 35min, then add emulsifier (sodium dodecylbenzenesulfonate, 5% nano-SiO 2 ) After dispersing for 15 minutes, adjust the pH value to 9-10 with 5% sodium hydroxide solution, and then disperse for 30-40 minutes with ultrasonic high-speed stirring to obtain seed latex;

[0041] S3: Preparation of core-shell modification additives

[0042] Add the seed latex obtain...

Embodiment 3

[0044]The preparation method of modified material for PVC, concrete steps are as follows:

[0045] S1: on nano-SiO 2 Into the surface treatment

[0046] nano-SiO 2 Powder added to silane coupling agent (butadienyltriethoxysilane, 1% nano-SiO 2 ) in the dilute alcohol aqueous solution, after fully mixing and stirring for 30 minutes, vacuum drying to obtain modified nano-SiO 2 ;

[0047] S2: Configure seed emulsion

[0048] A certain amount of nano-SiO 2 dispersed in deionized water (nano-SiO 2 The mass ratio to deionized water is 6:100), after pre-dispersion by ultrasonic dispersion and mechanical stirring for 35min, then add emulsifier (sodium dodecylbenzenesulfonate, 5% nano-SiO 2 ) After dispersing for 15 minutes, adjust the pH value to 9-10 with 5% sodium hydroxide solution, and then disperse for 30-40 minutes with ultrasonic high-speed stirring to obtain seed latex;

[0049] S3: Preparation of core-shell modification additives

[0050] Add the seed latex obtained ...

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Abstract

The invention discloses a preparation method of a modified material for PVC (Polyvinyl Chloride). The preparation method comprises the following specific steps: S1, carrying out surface treatment on nano SiO2; s2, preparing a seed emulsion; s3, preparing a core-shell modification auxiliary agent, namely adding the seed latex obtained in the step S2 into a reflux condensation device, heating in a water bath to 73 DEG C, adding a certain amount of a core-layer initiator and a crosslinking agent, supplementing a certain amount of an emulsifier, slowly adding a core-layer monomer, carrying out heat-preservation reaction for 1 hour, then adding a shell-layer initiator, slowly adding a shell-layer monomer, continuously carrying out heat-preservation reaction for 1-2 hours, and cooling to room temperature, so as to obtain the core-shell modification auxiliary agent. And adding a saturated saline solution for demulsification, and carrying out low-temperature vacuum drying to obtain the core-shell modification additive. According to the invention, inorganic nano silicon oxide subjected to surface modification is subjected to seed emulsion polymerization to synthesize a novel impact modifier with a core-shell structure, so that the toughness and the strength of PVC can be improved, and the impact modifier also has the functions of resisting aging and improving processability.

Description

technical field [0001] The invention belongs to the field of plastic processing aids, in particular to a preparation method of a modified material for PVC. Background technique [0002] Polyvinyl chloride (PVC) is one of the well-known general-purpose plastic varieties with wide application and huge output. Due to its wide range of sources, simple synthesis method, very reasonable price, the obtained products have good processing performance and mechanical properties, and good chemical stability and excellent flame retardancy, so the application scenarios of polyvinyl chloride are very wide and the development is very rapid. . [0003] As an excellent impact modifier, ACR has been widely used in the PVC industry, but the cost is high and there is a large gap in domestic production. Therefore, accelerating the research and development of ACR modifiers is a very urgent task for the PVC industry. Contents of the invention [0004] In order to solve the deficiencies in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K9/10C08K7/26
Inventor 方春平蒋丽张莉娜
Owner 常州市五洲环保科技有限公司
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