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Preparation method of polyvinyl chloride resin with high oil absorption rate
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A technology of polyvinyl chloride resin and high oil absorption, which is applied in the field of preparation of polyvinyl chloride resin, can solve the problems of low oil absorption rate, and achieve the effects of high oil absorption rate, easy plasticization, and thin resin film
Active Publication Date: 2013-10-02
CHINA PETROLEUM & CHEM CORP
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[0008] The technical problem to be solved by the present invention is to provide a method for preparing polyvinyl chloride resin with high oil absorption rate that increases resin voids and reduces film formation, so as to overcome the defect of low oil absorption rate in resin processing performance existing in the prior art
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Embodiment 1
[0023] Component:
[0024] Vinyl chloride 3.0kg
[0025] Deionized water 4.0kg
[0026] Dispersion system high alcoholysis degree polyvinyl alcohol (polymerization degree 1000, alcoholysis degree 80%, mass concentration 5.1%) / low alcoholysis degree polyvinyl alcohol ((polymerization degree 300, alcoholysis degree 45%, mass concentration 34% ) / hydroxypropyl methylcellulose (the degree of methyl substitution is 1.9, the content is 30%, the degree of hydroxypropyl substitution is 0.25, the content is 10% and the mass concentration is 2.9%), the ratio is 3:1:2, 0.05kg
[0027] Initiation system Di-(2-ethylhexyl) peroxydicarbonate / cumyl peroxyneodecanoate, the ratio is 3:1, 20% aqueous emulsion, 0.015kg
[0028] Functional Auxiliary C 5 Normal alkanes, the addition amount is 0.15kg
[0029] Terminator Diethylhydroxylamine, 0.075g
[0030] Operation method:
[0031] Rinse the 10L polymerization kettle, apply the anti-sticking agent and rinse, then vacuumize, suck in the deioni...
Embodiment 2
[0033]Repeat Example 1, the difference is the functional auxiliary C in the component 5 Normal alkanes, the addition amount is 0.30kg. The performance test results of the resin particles are shown in Table 1.
Embodiment 3
[0035] Repeat Example 1, the difference is that the functional auxiliary agent is C in the component 5 、C 6 、C 7 Compound alkanes, the ratio is 1:1:1, and the addition amount is 0.3kg. The performance test results of the resin particles are shown in Table 1.
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Abstract
The invention provides a preparation method of polyvinyl chloride resin with high oil absorption rate, which is implemented by the following steps of: adding vinyl chloride, deionized water, an initiation system, a dispersion system and a function assistant into a polymerizer; under a certain polymerization temperature, reacting for a certain time, adding a terminator and then obtaining polyvinyl chloride suspension; and removing an unreacted vinyl chloride monomer, centrifuging suspension, drying, and obtaining the polyvinyl chloride resin, wherein the function assistant is the mixture of several of C4-C10 nalkane and isoparaffin of the nalkane. By the method disclosed by the invention, the particle state of the polyvinyl chloride resin is improved, the interior of the obtained resin is loose and porous, so that the obtained resin has high voidage, uniform void distribution and high oil absorption rate.
Description
technical field [0001] The invention belongs to a preparation method of polyvinyl chloride resin, in particular to a preparation method with high oil absorption rate (or high plasticizer absorption rate). Background technique [0002] Polyvinyl chloride resin (PVC) is the resin with the second largest output in the world. Due to its low price and excellent performance, it has a wide range of applications. The resin can be synthesized by bulk method, emulsion method, and suspension method. In 2009, my country's PVC resin production capacity reached 17 million tons per year, of which the suspension method accounted for about 70-80%. Suspension polyvinyl chloride resin is under the action of dispersant and colloid preservation, the monomer is evenly dispersed in the continuous water phase by strong stirring, and the polymerization is initiated by peroxide or azo initiator at a certain temperature. Formed, the phase state is a typical heterogeneous precipitation polymerization,...
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