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Vinyl chloride-based copolymer, method for preparing vinyl chloride-based copolymer, composition comprising vinyl chloride-based copolymer, and resin product made from composition

A vinyl chloride-based resin and vinyl chloride technology are applied to vinyl chloride-based copolymers, resin products, including compositions thereof, and the field of preparation methods thereof, which can solve the problems of insufficient plasticization effect, limited application range, and high reaction temperature. problems, to avoid the performance degradation of resin products, avoid environmental pollution, and reduce melt viscosity.

Active Publication Date: 2021-03-30
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-based copolymer, method for preparing vinyl chloride-based copolymer, composition comprising vinyl chloride-based copolymer, and resin product made from composition
  • Vinyl chloride-based copolymer, method for preparing vinyl chloride-based copolymer, composition comprising vinyl chloride-based copolymer, and resin product made from composition

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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 method for preparing the vinyl chloride-based copolymer, a composition comprising the vinyl chloride-based copolymer, and a resin product made from the composition. The vinyl chloride-based copolymer includes a structural unit (a) based on vinyl chloride, a structural unit (b) based on a monomer represented by a formula (1) of CH2=CR1COO(R2O)xR3, and a structural unit (c) based on a monomer represented by a formula (2) of CH2=CHOR4; in the formula (1), R1 is selected from hydrogen and a linear or branched alkyl group having 1to 6 carbon atoms, the number x of repeating units is an integer selected from 2-20, each R2 is selected from a linear or branched alkylene group having 2-10 carbon atoms, the multiple R2s be the same or different, R3 is selected from hydrogen and a linear or branched alkyl group having 1 to 4 carbon atoms; and in the formula (2), R4 is selected from a linear or branched alkyl group having 1 to 10 carbon atoms, a linear or branched cycloalkyl group having 3 to 10 carbon atoms, and a linear or branched hydroxyalkyl group having 1 to 10 carbon atoms, the groups may be substituted with a halogenatom, and the hydrogen atom in the formula (2) may also be substituted by a halogen atom.

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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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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