Water emulsion type polyvinyl chloride resin terminator and preparation method thereof

A technology of polyvinyl chloride resin and terminator, which is applied in the field of water-emulsion polyvinyl chloride resin terminator and its preparation, can solve the problems of single general efficiency, no thermal stabilization effect, and single function, and achieve simple and good production process Termination effect, effect of improving processability

Active Publication Date: 2015-10-21
WUHAN KAIYUAN CHEM AUX CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its function is single, it only plays the role of termination without thermal stabilization, and the price is relatively high
[0007] Others such as α-methylstyrene have their own advantages and disadvantages for the polymerization reaction, but generally have a single effect, and cannot improve the thermal stability and processability of the product while terminating the polymerization

Method used

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  • Water emulsion type polyvinyl chloride resin terminator and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The preparation method of aqueous emulsion type polyvinyl chloride resin terminator comprises the following steps:

[0040] 1) Weigh 35g of liquid fatty acid zinc, 35g of diphenyl-isooctyl phosphite, 40g of 2,2-bis(4-hydroxyphenyl)propane, and 0.1g of benzene salicylate according to the weight of the above raw materials. ester, 4g of hydroquinone, 42g of sorbitan trioleate, 54g of polyoxyethylene sorbitan monolaurate, 8g of polyvinyl alcohol GH-20 and 320g of deionized water;

[0041] 2) Put the liquid fatty acid zinc, diphenyl-isooctyl phosphite and 2,2-bis(4-hydroxyphenyl)propane obtained in step 1) into a 1000mL flask, stir and dissolve at 125°C, and keep warm After 3 hours, it was lowered to normal temperature to obtain a mixed solution;

[0042] 3) Add phenyl salicylate and hydroquinone to the mixed solution obtained in step 2), and stir evenly to obtain a mixed terminator solution;

[0043] 4) Add sorbitan trioleate and polyoxyethylene sorbitan monolaurate to th...

Embodiment 2

[0047] The preparation method of aqueous emulsion type polyvinyl chloride resin terminator comprises the following steps:

[0048] 1) Weigh 27g of liquid fatty acid zinc, 48g of triphenyl phosphite, 65g of epoxy linseed oil, 9g of bisphenol A phosphite, 9g of 2,2-bis(4 -Hydroxyphenyl)propane, 0.2g of 2.5-bis-(5-tert-butyl-2-benzoxazolyl)thiophene, 0.1g of phenyl salicylate, 18g of 2-phenylpropene, 5g of sorbic acid Alcohol monolaurate, 8 g of sorbitan trioleate, 1 g of sodium dodecylbenzenesulfonate and 100 g of deionized water;

[0049] 2) Put the liquid fatty acid zinc, triphenyl phosphite, epoxy linseed oil, bisphenol A phosphite and 2,2-bis(4-hydroxyphenyl)propane obtained in step 1) at 160°C Stir to dissolve, keep warm for 2 hours and drop to normal temperature to obtain a mixed solution;

[0050]3) Add 2.5-bis-(5-tert-butyl-2-benzoxazolyl)thiophene, phenyl salicylate and 2-phenylpropene to the mixture obtained in step 2), and stir well to obtain the mixture termination...

Embodiment 3

[0055] The preparation method of aqueous emulsion type polyvinyl chloride resin terminator comprises the following steps:

[0056] 1) Weigh 21g of calcium stearate, 39g of diphenylisodecyl phosphite, 40g of epoxidized soybean oil, 12g of bisphenol A phosphite, 18g of 2, 2-bis(4-hydroxyphenyl)propane, 0.2g of 2,4-dihydroxybenzophenone, 5g of p-tert-butylcatechol, 5g of 2-phenylpropylene, 30g of polyoxyethylene sorbitan Monooleate, 10g of emulsifier OS-15, 4g of polyvinyl alcohol GH-22 and 200g of deionized water, standby;

[0057] 2) The calcium stearate obtained in step 1), diphenylisodecyl phosphite, epoxidized soybean oil, bisphenol A phosphite and 2,2-bis(4-hydroxyphenyl)propane Stir and dissolve at 90°C, keep warm for 5 hours and then lower to room temperature to obtain a mixed solution;

[0058] 3) Add 2,4-dihydroxybenzophenone, p-tert-butylcatechol and 2-phenylpropylene to the mixed solution obtained in step 2), and stir evenly to obtain a mixed terminator solution;

...

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Abstract

The invention discloses an aqueous emulsion PVC (polyvinyl chloride) resin terminator and a preparation method thereof. The terminator is prepared from the following raw materials in parts by weight: 70-140 parts of stabilizer, 18-42 parts of phenolic antioxidant, 0.1-0.3 parts of light stabilizer, 4-18 parts of polymerization inhibitor, 13-96 parts of emulsifier, 1-8 parts of dispersant and 100-320 parts of water. The method comprises the following steps of: firstly, dissolving the stabilizer and the light stabilizer by stirring, preserving heat, cooling to the normal temperature, then adding the light stabilizer and the polymerization inhibitor, and stirring evenly to obtain a mixed terminator solution; next, adding the emulsifier to the mixed terminator solution, heating to a temperature which ranges from 40 to 60 DEG C, stirring evenly to obtain a mixed emulsion, simultaneously mixing the dispersant with water, stirring and heating to a temperature which ranges from 80 to 100 DEG C to obtain a dispersion solution; finally, adding the dispersion solution to the mixed emulsion to obtain the aqueous emulsion PVC resin terminator. The preparation method provided by the invention has the characteristics of being simple in production process, easy in acquisition of raw materials, and low in cost; the aqueous emulsion PVC resin terminator provided by the invention is capable of well improving the thermal stability and processability of the PVC resin while terminating a polymerization reaction.

Description

technical field [0001] The invention relates to the field of terminators, in particular to an aqueous emulsion type polyvinyl chloride resin terminator and a preparation method thereof. Background technique [0002] In the production of PVC suspension polymerization, due to the decrease of monomers in the later stage of the polymerization reaction, the probability of polymerization termination increases, resulting in more low-molecular-weight polymers and branched chain polymers, and the content of terminal double bonds increases, and the chlorine atoms on allyl chloride are more concentrated. Unstable, thus affecting the thermal stability and processing performance of the product. Therefore, when the pressure drops to 0.10~0.15MPa in the later stage of the polymerization reaction, the reaction should be terminated immediately. [0003] The function of the water-emulsion type polyvinyl chloride resin terminator is: when the monomer polymerization reaches a certain level, ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F14/06C08F2/42
Inventor 容小波容晓庆
Owner WUHAN KAIYUAN CHEM AUX CO LTD
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