Vinyl chloride copolymer, its preparation method, its composition and its resin product

A vinyl chloride and copolymer technology, applied in the field of vinyl chloride resin synthesis, can solve the problems of insufficient plasticizing effect, limited application range and high reaction temperature, avoiding performance degradation, expanding application scope and reducing melt viscosity. Effect

Active Publication Date: 2022-02-18
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
Although the traditional chloroether resin improves the flexibility of vinyl chloride resin, it is usually only possible to process it without adding plasticizers when the tensile elongation at break is low, and when it is necessary to prepare tensile For products with high elongation at break, the plasticizing effect of vinyl ether monomers in the prior art is insufficient, resulting in the need to add a large amount of additional plasticizer
In addition, most of the traditional chloroether resins are obtained by emulsion polymerization and exist in the form of emulsion or paste resin, which limits its application range

Method used

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  • Vinyl chloride copolymer, its preparation method, its composition and its resin product
  • Vinyl chloride copolymer, its preparation method, its composition and its resin product

Examples

Experimental program
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Effect test

preparation example Construction

[0116]

[0117] 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.

[0118] 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.

[0119] 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

[0180] 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 18.9g is polypropylene glycol monomethacrylate (PPGMA-375, the situation of x=5 in the formula (1)) and 2.7g vinyl isobutyl ether (VIBE) of 375 molecular weights, nitrogen in the replacement reactor for 5min Air. Then, 32.4 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=60:35:5, 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 cop...

Embodiment 2

[0182] Change the feed mass ratio of VC and PPGMA-375 and VIBE to be VC:PPGMA-375:VIBE=60:14:26 and the polymerization reaction time is 7.5 hours, except that, obtain white solid in the same way as Example 1 48.2 g of granular vinyl chloride copolymers, the composition of which is 60.4% by mass of the structural unit (a) and 15.4% by mass of the structural unit (b) relative to the total mass of the vinyl chloride copolymer. The content of (c) was 24.2% by mass.

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Abstract

The present invention relates to a vinyl chloride-based copolymer, a preparation method thereof, a composition comprising the same, and a resin article made from the composition. This vinyl chloride-based copolymer includes a structural unit (a) based on vinyl chloride, a structural unit (b) based on a monomer represented by the following formula (1) and a structure based on a monomer represented by the following formula (2) Unit (c), CH 2 =CR 1 COO(R 2 O) x R 3 (1) In 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 = CHOR 4 (2) In formula (2), R 4 A straight chain or branched chain alkyl group with 1 to 10 carbons, a straight chain or branched cycloalkyl group with 3 to 10 carbons, and a straight chain or branched chain with 1 to 10 carbons hydroxyalkyl groups.

Description

technical field [0001] The invention relates to the field of vinyl chloride resin synthesis, in particular to a 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, plasticizers should be adde...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F214/06C08F216/18C08F220/28C08L27/06
CPCC08F214/06C08L27/06C08L2203/02C08F226/02C08F216/18
Inventor 杨万泰张先宏宋长统马育红
Owner BEIJING UNIV OF CHEM TECH
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