Method for producing PVC resin and obtained resin

A PVC resin and production method technology, applied in the field of organic chemistry, can solve the problems of long-term use performance, physical and mechanical performance degradation, stability, and poor whiteness of PVC, and achieve high anti-aging performance, reduced black and yellow spots, The effect of little change in light transmittance

CN109824806AInactive Publication Date: 2019-05-31INNER MONGOLIA WUHAI CHEM IND
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-05-31
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for producing PVC resin and the obtained resin. The production method adopts a suspension polymerization production process, and the production method comprises the following operations: S1, respectively adding a vinyl chloride (VCM) monomer and deionized water into a polymerization kettle, delaying for a certain time; S2, after a dispersant and an initiator are added, enabling the polymerization kettle to enter a reaction stage; S3, controlling the reaction process by a DCS, when a set reaction end point requirement is met, starting a terminator feeding system,automatically adding the terminator into the polymerization kettle, and finishing the polymerization reaction. Rare earth additives are added in a production process. According to the production method provided by the invention, the amount of the rare earth additives added into a PVC product is adjusted to produce resin products with different types and properties, other qualities of the productare unchanged, and the number of black and yellow spots is reduced; the light transmittance is not changed greatly, and the haze is obviously increased; the aging resistance of the resin added with the rare earth additives is higher; and the tensile strength is slightly higher than that of common resin, and the dynamic stability is better.
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Description

technical field

[0001] The invention belongs to the field of organic chemistry, and in particular relates to a production method of a chlorine-containing polymer. Background technique

[0002] Polyvinyl chloride (PVC) is one of the plastic products with the largest output in the world. PVC is a white powder with an amorphous structure, with a small degree of branching and a relative density of about 1.4. It is cheap and widely used, and is widely used in building materials, industrial products, daily necessities, pipes, packaging materials, foaming materials, sealing materials, etc. It can also be compounded with metal materials, such as building materials such as door and window structures for buildings, wall decorations, etc. Due to the excellent electrical insulation properties of PVC, it can be used in the manufacture of plugs, sockets, switches and cables in the electrical and electronic industries.

[0003] Although PVC has a wide range of uses, there are also some p...

Examples

Embodiment 1

[0035] A kind of production method of PVC resin, adopts suspension polymerization production process, described production method comprises operation:

[0036] Rare earth additives, vinyl chloride (VCM) monomers, and ion-free water are sequentially added into the polymerization kettle, wherein the rare earth additives are lanthanum stearate, and the mass of lanthanum stearate is 0.035% of VCM. delay 120s;

[0037] After adding the configured quantitative dispersant, initiator and other auxiliary agents, the polymerization kettle enters the reaction stage. Initiator: EHP and CNP (mass ratio 1:3), the total dosage is 8 / 10,000 of the monomer mass.

[0038] Dispersant 2: 25 parts of GH-20 (polyvinyl alcohol)

[0039] Dispersant 1: 80 parts of 7206 (polyvinyl alcohol)

[0040] HG-02 (polyvinyl alcohol) 10 parts

[0041] 60HD50 (hydroxypropyl methylcellulose) 10 parts

[0042] The total amount of dispersant is 8 / 10,000 of the monomer mass.

[0043] The reaction process is contr...

Embodiment 2

[0045] The production method of this embodiment is basically the same as that of Example 1, except that the rare earth auxiliary agent lanthanum stearate is added in the production process, and the quality of lanthanum stearate is 0.046% of VCM.

Embodiment 3

[0047] The production method of this embodiment is basically the same as that of Example 1, except that the rare earth additive lanthanum stearate is added in the production process, and the quality of lanthanum stearate is 0.073% of VCM.