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Pre-dispersed polyol ester for PVC stabilizer, and preparation method thereof

A polyol ester and pre-dispersion technology is applied in the field of pre-dispersed polyol ester and its preparation, which can solve the problems of precipitation, little improvement in compatibility, drop in melting point, etc., and achieves good precipitation resistance and lubricity, reducing Precipitation phenomenon, the effect of improving fluidity

Active Publication Date: 2020-06-12
胡吉华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used polyols include pentaerythritol, dipentaerythritol, trimethylol isocyanurate, etc., but they have poor compatibility with PVC, and are easy to migrate to the surface of the product or adhere to the surface of the processing equipment, forming a precipitation phenomenon, which affects the processing process and products. performance
Esterification of some hydroxyl groups can improve compatibility. When the content of hydroxyl groups is reduced or the carbon chains connected are longer, the stabilizing effect of polyol esters will decrease, and the esterification of polyols with a lower proportion of short carbon chains will The stabilizing effect has little effect, but the compatibility with PVC is not much improved, and there is still precipitation
The polyol after partial esterification of the short carbon chain has its crystalline structure destroyed, its melting point drops sharply, and it is a solid or liquid with strong adhesion at room temperature. Components form hard-to-disperse clumps that are difficult to handle

Method used

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  • Pre-dispersed polyol ester for PVC stabilizer, and preparation method thereof
  • Pre-dispersed polyol ester for PVC stabilizer, and preparation method thereof
  • Pre-dispersed polyol ester for PVC stabilizer, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take 30g of pentaerythritol, 16g of terephthalic acid, 0.8g of catalyst, and 10g of xylene as esterification components; add the above components into a 250ml four-necked flask at one time, heat up to 180°C, stir at a speed of 30rpm, and reflux React for 6 hours, and at the same time separate the water produced by the reaction, and then distill out the xylene under reduced pressure at a pressure of 10KPa. The temperature was lowered to 120°C, a small amount of reaction product was taken out, cooled to obtain a viscous solid, and set aside. The remaining reaction product was heated up to 135°C again, continued to stir at the same speed, and slowly added 42g of zinc stearate and 5g of pentaerythritol monostearate. The bar-shaped waxy solid is the pre-dispersed polyol ester and is ready for use.

Embodiment 2

[0030] Get pentaerythritol 30g, benzoic acid 26g, lauric acid 5g, catalyzer 0.8g, xylene 10g, as esterification component; Add glyceryl monostearate 57g in the four-necked flask of 250ml, then add esterification component, stir Evenly, heat up to 180°C, stir at a speed of 80rpm, reflux for 2 hours, and separate the water generated by the reaction, then distill xylene under reduced pressure at a pressure of 20KPa; then use spray cooling to obtain granular wax Solid, that is, pre-dispersed polyol ester, for later use.

[0031] Embodiment 3 Effect Example

[0032] In this embodiment, the predispersed polyol ester prepared in Examples 1 and 2 and the esterified compound prepared in Example 1 are applied to the production of PVC materials (3#, 4#, 5#), and rheological experiments are done, and simultaneously with Pentaerythritol was compared to do a comparative experiment (2#), and a blank comparative experiment (1#) was set up to observe the stabilizing effect and precipitation o...

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Abstract

The invention discloses a pre-dispersed polyol ester for a PVC stabilizer, and a preparation method thereof. The pre-dispersed polyol ester comprises, by weight, 100 parts of polyol ester, 30-1000 parts of a dispersion medium and 0-30 parts of a dispersing agent, wherein the polyol ester is prepared by an esterification reaction of a polyol and a compound containing a carboxyl group or anhydride;the dispersion medium is an organic acid metal soap, a wax lubricant, an amide lubricant and / or an antioxidant; and the dispersing agent is an anionic surfactant, a nonionic surfactant or a mixture ofthe anionic surfactant and the nonionic surfactant. The preparation method comprises the following steps: adding an esterification component into a container, performing an esterification reaction toobtain the polyol ester, and then adding the dispersion medium and the dispersing agent for pre-dispersion, or firstly adding the dispersion medium and the dispersing agent into the container, then adding the esterification component, and carrying out the esterification reaction. The polyol ester has the advantages of good stability, strong fluidity, good precipitation resistance and lubricity, convenience in use, good dispersion in PVC, and good application value.

Description

technical field [0001] The invention relates to a predispersed polyol ester used for PVC stabilizers and a preparation method thereof. [0002] technical background [0003] Due to its good performance and low price, polyvinyl chloride (PVC) is widely used in the manufacture of pipes, profiles, blinds, films, artificial leather, wires and cables, etc. It is one of the important general-purpose plastics. In order to avoid thermal oxygen decomposition during processing, it is generally necessary to add stabilizers. Commonly used stabilizers include lead salts, cadmium salts, organotin, zinc-based stabilizers, and organic stabilizers. Among them, lead and cadmium have been phased out due to their toxicity and serious impact on the environment; organotin has good stabilizing effect, but the price is high, odorous, and the scope of use is limited; organic stabilizers are under development, and currently used alone It didn't work out very well. The calcium-zinc composite stabiliz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L67/00C08K5/12C08K5/103C08G63/127C08L23/06C08K13/02
CPCC08L27/06C08K5/12C08K5/103C08G63/127C08L67/00C08L23/06C08K13/02
Inventor 胡吉华
Owner 胡吉华