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Self-plasticizing vinyl chloride-based copolymer, method for producing same, composition comprising same, and resin product produced from same

A technology for plasticizing vinyl chloride and copolymers, which is applied in the field of resin products, its preparation method, its composition, and self-plasticizing vinyl chloride-based copolymers, and can solve the problem of insufficient self-plasticizing and industrial practical value. High, comonomer self-polymerization and other issues

Active Publication Date: 2020-10-27
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: when the proportion of the comonomer (such as the above-mentioned MMA, etc.) is large, the phenomenon of self-polymerization of the comonomer is prone to occur, and the molecular weight of this self-polymer is generally large, which leads to the incompatibility with PVC. Compatibility becomes poor, but it will not play the role of self-plasticizing
Although the living polymerization method is suitable for adjusting the structure of the resulting copolymer resin, this technology has high requirements on the production process, high cost and no industrial application value
[0011] As mentioned above, most of the currently disclosed technologies are only in the stage of scientific research, and the industrial practical value is not high; while the technologies suitable for industrial production are often difficult to achieve excellent Self-plasticizing and poor control over product structure

Method used

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  • Self-plasticizing vinyl chloride-based copolymer, method for producing same, composition comprising same, and resin product produced from same
  • Self-plasticizing vinyl chloride-based copolymer, method for producing same, composition comprising same, and resin product produced from same

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preparation example Construction

[0091]

[0092] The preparation method of the self-plasticizing vinyl chloride copolymer of the present invention is the preparation method of the above-mentioned self-plasticizing vinyl chloride copolymer, which comprises: making the raw material including vinyl chloride and the monomer represented by the above formula (1) Polymerization.

[0093] The details of the monomer represented by the above formula (1) and other optional monomers have been described above and will not be repeated here.

[0094] The production method of the self-plasticizing vinyl chloride copolymer of the present invention is preferably carried out in the presence of a radical polymerization initiator. In other words, the preparation method of the self-plasticizing vinyl chloride copolymer of the present invention is preferably based on a free radical polymerization mechanism, and the preparation method will be described in detail below.

[0095] (polymerization initiator)

[0096] Initiators for ...

Embodiment 1

[0143] 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, 1.62 g of polypropylene glycol monomethacrylate with a molecular weight of 375 (PPGMA-375, the case where x=5 in formula (1)) was filled with nitrogen for 5 minutes to replace the air in the reaction vessel. Then, 52.38 g of VC monomer was 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 monomer feeding mass ratio VC:PPGMA-375=97:3, 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 of white solid particles, and i...

Embodiment 2

[0145] Change the feed mass ratio of VC and PPGMA-375 to be VC:PPGMA-375=95:5 and the polymerization reaction time is 7.5 hours, except that, in the same manner as in Example 1, obtain the vinyl chloride copolymerization of white solid particles 48.2 g of the product, the composition: the content of the structural unit (a) was 96.4% by mass, and the content of the structural unit (b) was 3.6% by mass based on the total mass of the vinyl chloride-based copolymer.

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Abstract

The present invention relates to a self-plasticizing vinyl chloride-based copolymer, a method for preparing the self-plasticizing vinyl chloride-based copolymer, a composition comprising the self-plasticizing vinyl chloride-based copolymer, and a resin product made from the composition. The self-plasticizing vinyl chloride-based copolymer has excellent self-plasticizing properties and processability; and products made from the vinyl chloride-based copolymer also have excellent biological properties. The invention provides the self-plasticizing vinyl chloride-based copolymer. The self-plasticizing vinyl chloride-based copolymer comprises a structural unit (a) based on vinyl chloride and a structural unit (b) based on a monomer represented by formula (1): CH2 = CR1COO (R2O) xR3 (1), whereinR1 is at least one selected from the group consisting of hydrogen and a linear or branched alkyl group having 1-6 carbon atoms, and R2 is at least one selected from the group consisting of hydrogen and a branched alkyl group having 1-6 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, and the R2 may be the same or different; and R3 is at least one selected from the group consisting of hydrogen and a linear or branched alkyl group having 1-4 carbon atoms.

Description

technical field [0001] The invention relates to the field of vinyl chloride resin synthesis, in particular to a self-plasticizing 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 not only used in construction and daily use, but also in medical fields, such as infusion, blood transfusion bags, and urinary catheters. etc. [0003] Due to the relatively large polarity of the PVC molecular chain, the movement of the molecular chain is restricted, which in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F214/06C08F220/28C08F220/18C08F216/14C08L27/06
CPCC08F214/06C08L27/06C08F216/1408
Inventor 杨万泰崔芃张先宏宋长统马育红
Owner BEIJING UNIV OF CHEM TECH
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