Nontoxic calcium and zinc thermal stabilizer

A heat stabilizer, calcium-zinc technology, applied in the field of non-toxic calcium-zinc heat stabilizers, can solve the problems of extended stability time, poor processability of stabilizers, single stability performance, etc., achieve excellent static performance, improved processing performance, and low cost Effect

Active Publication Date: 2012-06-20
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a new type of non-toxic calcium-zinc stabilizer, which realizes the synergistic effect between the components of the stabilizer, solves the disadvantages of poor processability and single stability of the stabilizer, and prolongs the stability time

Method used

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  • Nontoxic calcium and zinc thermal stabilizer
  • Nontoxic calcium and zinc thermal stabilizer
  • Nontoxic calcium and zinc thermal stabilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of main stabilizer;

[0027] a) Add 0.05 mol of stearic acid and 0.05 mol of benzoic acid into a 1000 ml three-necked flask, heat up to 70° C. until completely melted.

[0028] b) Dissolve 0.1 mol of sodium hydroxide (slightly excessive) in a 100ml beaker, add dropwise to a three-necked flask with a dropping funnel, drop it in ten minutes, and maintain the reaction for half an hour.

[0029] c) Raise the temperature to 85°C, then weigh 0.025 mol of zinc sulfate heptahydrate and 0.025 mol of calcium chloride into a 50ml beaker to dissolve completely, add zinc sulfate and calcium chloride at the same time with a dropping funnel, and drop them in half an hour , and maintain the reaction for 1 hour.

[0030] e) The product was washed with water, suction filtered, and dried in an oven at 80° C. for 12 hours until constant weight.

Embodiment 2

[0032] Preparation of primary stabilizer:

[0033] a) Add 0.05 mol of stearic acid and 0.05 mol of benzoic acid into a 1000 ml three-necked flask, heat up to 80-90° C. until completely melted.

[0034] b) Dissolve 0.1 mol of sodium hydroxide (slightly excessive) in a 100ml beaker, add dropwise to a three-necked flask with a dropping funnel, drop it in ten minutes, and maintain the reaction for half an hour.

[0035] c) The temperature is raised to 95° C., and then the zinc chloride of 0.025 mol is weighed and completely dissolved, and then added into the flask with a dropping funnel, and then 0.025 mol of calcium chloride is weighed and added to a 50 ml beaker to completely dissolve, and then added respectively with the dropping funnel, Dropping finished in half an hour, and finally maintained the reaction for 1 hour.

[0036] e) The product was washed with water, suction filtered, and dried in an oven at 80° C. for 12 hours until constant weight.

Embodiment 3

[0038] Preparation of primary stabilizer:

[0039] a) Add 0.05 mol of stearic acid and 0.1 mol of benzoic acid into a 1000 ml three-necked flask, heat up to 80-90° C. until completely melted.

[0040] b) Dissolve 0.15 mol of sodium hydroxide (slightly excessive) in a 100 ml beaker, add it into a three-necked flask with a dropping funnel, drop it in ten minutes, and maintain the reaction for half an hour.

[0041] c) Raise the temperature to 95°C, then weigh 0.03 mol of calcium chloride to dissolve completely and add it into the flask first with a dropping funnel, then weigh 0.03 mol of zinc sulfate heptahydrate and add it to a 50ml beaker to dissolve completely, then add it separately with a dropping funnel , respectively controlled for half an hour to finish dripping, and finally maintained the reaction for 1 hour.

[0042] e) The product was washed with water, suction filtered, and dried in an oven at 80° C. for 12 hours until constant weight.

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Abstract

The invention discloses a nontoxic calcium and zinc thermal stabilizer, which comprises the following matters: a primary calcium and zinc stabilizer, a diketone, a polyol, an external lubricating agent, an internal lubricating agent and an antioxygen. Compared with the prior art, the one-pot-process chemical mixing for synthesizing a calcium and zinc salt, which is mixing on a molecular level, has better synergetic effect than physical mixing; the introduction of another anionic benzoic acid on the basis of one anionic stearic acid greatly improves the processing properties of the stabilizer,such as lubricating property, transparent property and compatibility; without any toxic components, the mixture is really nontoxic and environment-friendly; the prepared thermal stabilizer has high static performance, dynamic performance and color constancy; and at 180 DEG C, the congo red time is more than 120 minutes, and the white difference delta E between two rolled pieces is less than 2. The production process is simple and the cost is low.

Description

technical field [0001] The invention belongs to heat stabilizers, in particular to nontoxic calcium-zinc heat stabilizers for polyvinyl chloride. Background technique [0002] Polyvinyl chloride (PVC) is one of the five most commonly used synthetic resins in the world, with the largest consumption. It has superior performance and is widely used in various fields such as construction, agriculture, and daily necessities. Due to the poor processing thermal stability of PVC at high temperatures, heat stabilizers must be added to maintain its performance during its molding process. Commonly used heat stabilizers mainly include lead salts, organotins, rare earths, and metal soaps. Lead salt stabilizers are cheap, have good thermal stability effects, and are used in relatively large amounts, but they are highly toxic, seriously endangering human health and polluting the environment. Cadmium and other toxic metals, and issued a directive to ban the sale of equipment containing six ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K13/02C08K5/098C08K5/07C08K5/053C08L27/06
Inventor 周运友万东孙军勇王龙
Owner ANHUI NORMAL UNIV
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