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Preparation method of high transparent polyvinyl chloride resin

A polyvinyl chloride resin and transparency technology, applied in the field of preparation of high-transparency PVC special resin, can solve the problems of limited improvement of resin thermal stability, high price, and high cost of PVC resin

Active Publication Date: 2010-12-22
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few literature reports on improving the transparency of polyvinyl chloride through polymerization: Japanese patent JP2000143710 introduces a method for preparing transparent polyvinyl chloride by suspension polymerization. A suspension stabilizer of epoxy polymer is added to the water phase. The thermal stability of the resin prepared by the method has limited improvement; JP51074078 prepares polyvinyl chloride with improved thermal stability by suspension polymerization by adjusting the polymerization formula and polymerization process. The polyvinyl chloride obtained has good transparency, and the suspension stabilizer uses saponified acetic acid Ethylene, saponified vinyl acetate is expensive and there are few manufacturers, so the cost of producing PVC resin is high

Method used

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  • Preparation method of high transparent polyvinyl chloride resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The polymerization kettle is cleaned and rinsed, and the anti-sticking kettle agent "Italian Yellow" (NOXOL WSW) is coated, and the formula amount (parts by weight) is added:

[0038] Deionized water (DW) 140

[0039] Initiator (TAPP) 0.02

[0040] Initiator (TBPND) 0.035

[0041] Dispersant 1 (E50) 0.03

[0042] Dispersant 2 (PVA80) 0.015

[0043] Dispersant 3 (PVA55) 0.004

[0044] polymeric stabilizer (C 7 -C 10 fatty acid zinc) 0.03

[0045] Chain transfer agent (mercaptoethanol) 0.03

[0046] After vacuuming to a certain degree of vacuum (-0.90MPa), add:

[0047] Vinyl Chloride Monomer (VCM) 100

[0048] Stir coldly for 5 minutes, then warm up to the reaction temperature, and start timing the polymerization. Polymerization process parameter control: polymerization temperature is 61.5±0.5°C; feeding coefficient is 75%; stirring speed is 180r / min; polymerization pressure drop is 0.3MPa. After the pressure drop of the polymerization kettle drops to the proces...

Embodiment 2

[0052] The polymerization kettle is cleaned and rinsed, and the anti-sticking kettle agent "Italian Yellow" (NOXOL WSW) is coated, and the formula amount (parts by weight) is added:

[0053] Deionized water (DW) 140

[0054] Initiator (TAPP) 0.02

[0055] Initiator (TBPND) 0.035

[0056] Dispersant 1 (E50) 0.03

[0057] Dispersant 2 (PVA80) 0.015

[0058] Dispersant 3 (PVA55) 0.004

[0059] polymeric stabilizer (C 7 -C 10 fatty acid zinc) 0.03

[0060] Chain transfer agent (mercaptoethanol) 0.01

[0061] After vacuuming to a certain degree of vacuum (-0.90MPa), add:

[0062] Vinyl Chloride Monomer (VCM) 100

[0063] Stir coldly for 5 minutes, then warm up to the reaction temperature, and start timing the polymerization. Polymerization process parameter control: polymerization temperature is 61.5±0.5°C; feeding coefficient is 75%; stirring speed is 180r / min; polymerization pressure drop is 0.3MPa. When the reaction was carried out for 1.5h, add:

[0064] Chain trans...

Embodiment 3

[0070] The polymerization kettle is cleaned and rinsed, and the anti-sticking kettle agent "Italian Yellow" (NOXOL WSW) is coated, and the formula amount (parts by weight) is added:

[0071] Deionized water (DW) 140

[0072] Initiator (EHP) 0.03

[0073] Initiator (ACPND) 0.05

[0074] Dispersant 1 (E50) 0.017

[0075] Dispersant 2 (PVA80) 0.034

[0076] Dispersant 3 (PVA55) 0.038

[0077] polymeric stabilizer (C 7 -C 10 fatty acid zinc) 0.03

[0078] After vacuuming to a certain degree of vacuum, add:

[0079] Vinyl Chloride Monomer (VCM) 100

[0080] Stir coldly for 5 minutes, then warm up to the reaction temperature, and start timing the polymerization. Polymerization process parameter control: polymerization temperature is 57±0.5°C; feeding coefficient is 75%; stirring speed is 180r / min; polymerization pressure drop is 0.3MPa. After the pressure of the polymerization kettle drops to the process control point, add:

[0081] Composite heat-resistant terminator (di...

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Abstract

The invention discloses a preparation method of a high transparent PVC (Polyvinyl Chloride Resin) special resin with high ageing whiteness and favorable heat resistance performance. The preparation method comprises the following steps of: cleaning and washing a polymerizing kettle, coating a kettle antisticking agent, adding deionized water, a dispersoid agent, a compound peroxide initiator, a chain transfer agent and a polymerization stabilizer, vacuumizing to a certain vacuum degree, adding a vinyl chloride monomer, coldly stirring, then raising temperature to the reaction temperature, timing when polymerization starts, adding a compound heat-resistant terminator after the pressure of the polymerizing kettle is reduced to a process control point, continuously stirring, discharging slurry and drying to obtain the PVC resin. The prepared PVC resin has high ageing whiteness and favorable heat resistance performance and transparency.

Description

technical field [0001] The invention relates to the field of modification of polyvinyl chloride (PVC), in particular to a preparation method of a high-transparency PVC special resin with high aging whiteness and good heat resistance. Background technique [0002] With the rapid growth of my country's national economy, the demand for PVC resin is also growing rapidly, causing domestic and foreign manufacturers to increase investment and expand PVC devices, and the growth rate of capacity expansion is too fast, and the PVC resin market is under huge competition pressure. Downstream customers have very strict requirements on resin quality, especially in the fields of ultra-permeable film, plastic wrap, film, transparent soft board, transparent hose, medical material, medical transparent sheet, etc., requiring good whiteness and transparency of PVC resin high. [0003] At present, the PVC resins produced by domestic PVC manufacturers using peroxide initiators instead of azo ini...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F114/06C08F2/20C08F4/38
Inventor 张学明鲍春伟刘浩车万里张磊孔秀丽孙丽朋王秀丽王晶
Owner CHINA PETROLEUM & CHEM CORP
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