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Fluorine-containing vinyl chloride copolymer, its preparation method, its composition and resin product made from the composition

A vinyl chloride-based resin and vinyl chloride technology, applied in the field of resin products, can solve the problems of neglect, easy decomposition, and high reaction temperature, and achieve the effects of avoiding performance degradation, reducing melt viscosity, and excellent self-plasticity.

Active Publication Date: 2022-03-04
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology has the following problems: the reaction temperature is as high as 180°C, it takes a long time, and PVC is easy to decompose
However, the copolymer resin does not have self-plasticizing properties, and it still needs to add plasticizers during processing
At the same time, Non-Patent Document 9 does not pay attention to whether the above-mentioned processability improvement effect can still be obtained when other monomers are introduced into the copolymer.

Method used

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  • Fluorine-containing vinyl chloride copolymer, its preparation method, its composition and resin product made from the composition
  • Fluorine-containing vinyl chloride copolymer, its preparation method, its composition and resin product made from the composition

Examples

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preparation example Construction

[0124]

[0125] The preparation method of the vinyl chloride copolymer of the present invention is the preparation method of the above-mentioned vinyl chloride copolymer, which comprises: making vinyl chloride, the monomer represented by the above formula (1) and the monomer represented by the above formula (2) The raw materials of the body are subjected to a copolymerization reaction.

[0126] The details of vinyl chloride, the monomer represented by formula (1), the monomer represented by formula (2) and other monomers have been described above, and will not be repeated here.

[0127] Examples of copolymerization reactions of the present invention include, without limitation, block polymerization, random polymerization, graft polymerization, gradient polymerization. Among them, random polymerization is preferable from the viewpoint of expressing the technical effect of the present invention more favorably, that is, the molecular chain of the vinyl chloride-based copolymer ...

Embodiment 1

[0192] In a stainless steel micro-reactor with an internal volume of 200ml of stirring blades, 100g of deionized water, 10.4g of 2 mass % PVA aqueous solution, 0.042g of hydroxypropylmethylcellulose, 0.05g of azobisisobutyronitrile, The molecular weight of 24.84g is polypropylene glycol monomethacrylate (PPGMA-375, the situation of x=5 in the formula (1)) of 375, 2.16g hexafluorobutyl methacrylate (HFBMA), nitrogen gas 5min replaces reactor in the air. Then, 27.0 g of VC monomers were introduced into the reactor. After pre-stirring for 60 minutes, the temperature was raised to 70°C to start polymerization. It should be noted that the mass ratio of the monomers was VC:PPGMA-375:HFBMA=50:46:4, and the polymerization reaction time was 8 hours. After the polymerization reaction was completed, unreacted VC monomer was reclaimed, and the polymerization product was alternately washed with a large amount of deionized water and ethanol to obtain 50.5 g of the vinyl chloride copolymer ...

Embodiment 2

[0194] Change the feed mass ratio of VC and PPGMA-375, HFBMA to be VC:PPGMA-375: HFBMA=62:30:8 and the polymerization reaction time is 7.5 hours, except that, obtain white solid in the same manner as Example 1 51.2 g of granular vinyl chloride copolymers, the composition of which is 61.0% by mass of the structural unit (a) and 28.6% by mass of the structural unit (b) based on the total mass of the vinyl chloride copolymer. The content of (c) was 10.4% by mass.

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Abstract

The present invention relates to a fluorine-containing vinyl chloride copolymer, a preparation method thereof, a composition comprising the same and a resin product made from the composition. The vinyl chloride copolymer comprises: a structural unit (a) based on vinyl chloride, a structural unit (b) based on a monomer represented by the following formula (1), and a structural unit (b) based on a monomer represented by the following formula (2). Structural unit (c), CH 2 =CR 1 COO(R 2 O) x R 3 (1) In the formula (1), R 1 selected from hydrogen and straight-chain or branched-chain alkyl groups with 1 to 6 carbons; the number of repeating units x is an integer selected from 2 to 20, and each R 2 Selected from linear or branched alkylene groups with carbon numbers of 2 to 10, which may be the same or different; R 3 Selected from hydrogen and straight-chain or branched-chain alkyl groups with 1 to 4 carbons, CH 2 =CR 4 COOR 5 (2) In the formula (2), R 4 selected from hydrogen and methyl, R 5 Selected from linear or branched fluoroalkyl groups with 1 to 18 carbons, fluorocycloalkyls with 3 to 18 carbons, and fluorophenyl groups, hydrogen in the formula (2) Atoms may be substituted by halogen atoms.

Description

technical field [0001] The invention relates to the field of vinyl chloride resin synthesis, in particular to a fluorine-containing vinyl chloride copolymer, a preparation method thereof, a composition comprising the same and a resin product made from the composition. Background technique [0002] Polyvinyl chloride (PVC) resin is formed by free radical polymerization of vinyl chloride monomer (VC). It is one of the five general-purpose resins in synthetic materials. Its output is second only to polyethylene and polypropylene, ranking third in the world for general-purpose plastics. . Due to its excellent chemical resistance, chemical stability, thermoplasticity and low manufacturing cost, PVC resin is widely used in construction, water supply, daily use and biomedical fields. [0003] Due to the relatively large polarity of the PVC molecular chain, the movement of the molecular chain is restricted, which increases the processing difficulty of PVC resin. Therefore, plastic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F214/06C08F220/24C08F220/28C08L27/06
CPCC08F214/06C08L27/06
Inventor 杨万泰张先宏宋长统马育红
Owner BEIJING UNIV OF CHEM TECH
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