Preparation method of highly polymerized polyvinyl chloride resin chain extender emulsion

A polyvinyl chloride resin with high degree of polymerization technology, applied in the field of copolymers of vinyl chloride, to achieve the effects of wide resin molecular weight distribution, increased processing performance and resilience, and regular particles

Active Publication Date: 2013-12-11
贵州开磷遵义碱厂
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But there is no patent application for high-polymerization polyvinyl chloride resin chain extender

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  • Preparation method of highly polymerized polyvinyl chloride resin chain extender emulsion

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[0018] The following examples can better illustrate the present invention:

[0019] Span 80 and Tween 40 are used as emulsifier raw materials. The HLB value of Span 80 is 4.3, and the HLB value of Tween 40 is 15.6. The emulsifier HLB is compounded according to a certain mass percentage of c1 and c2. The value is W, then W=c1×HLB1+c2×HLB2. Use this relational formula to prepare composite emulsifiers with HLB values ​​of 12.5±0.5 and 13±0.5 for the preparation of chain extender a emulsion of alkyl alcohol esters of acrylate and chain extender b emulsion of allyl esters . Under certain conditions, when the amount of emulsifier is 5% of the mass of chain extender a, the stirring time is 60min, and the stirring speed is 800r / min, an emulsion with a Zeta of 35mV chain extender a is prepared; when the amount of emulsifier is Under the conditions of 7% chain extender emulsion mass, 60 min stirring time, and 900 r / min stirring speed, the chain extender b emulsion with a Zeta of 33 mV...

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Abstract

The invention discloses a preparation method of highly polymerized polyvinyl chloride resin chain extender emulsion. According to the method, two emulsifiers with different hydrophile-lipophile balance (HLB) values are compounded as the emulsifier of the chain extender. The method comprises the following concrete processes: by using a product in span series or a product in Tween series as emulsifier materials of the chain extender, taking two materials and the chain extender according to the accumulated dosage to be put into a reaction kettle, mixing, controlling the stirring time and the stirring speed, and evenly stirring, so as to respectively prepare acrylic ester chain extender emulsion and allyl ester chain extender emulsion; and finally compounding according to the mass ratio of 7 to 3, and evenly mixing, so as to obtain the highly polymerized polyvinyl chloride resin chain extender emulsion. The chain extender emulsion prepared by the method is applied to a polyvinyl chloride (PVC) resin polymerization reaction system; the mean polymerization degree of the prepared PVC resin is obviously improved. The preparation method is suitable for preparation of functional additive emulsion such as a polymer polymerization chain extender.

Description

technical field [0001] The invention relates to a copolymer of vinyl chloride, in particular to a preparation method of polyvinyl chloride resin with a high degree of polymerization. Background technique [0002] High degree of polymerization polyvinyl chloride (HPVC) resin refers to a PVC resin with an average degree of polymerization of more than 1700 or a slightly cross-linked structure between its molecules, among which HPVC with an average degree of polymerization of 2500 is the most common. The production methods of HPVC resin can be divided into suspension method, emulsion method and mixing method, and the suspension method is the main method. At present, there are three main production processes for HPVC resin by suspension method: low temperature method, internal plasticizing monomer method, and chain extender method. [0003] In the suspension polymerization process, adding a certain amount of chain extender to prepare HPVC resin is the chain extender method....

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F214/06C08F220/10C08F218/00C08F2/18
Inventor 王稚阳梅桂李静吕丹唐兴兰赵伦东王璐雷云霄王红民宋梓廉王学会钟后国邹模
Owner 贵州开磷遵义碱厂
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