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Hydrotalcite composite environmental protection stabilizer for PVC, and preparation method thereof

An environmentally friendly stabilizer and hydrotalcite technology, applied in the field of PVC additives, can solve the problems of not being able to be the main stabilizer alone, low thermal stability, poor coloring, etc., to achieve improved thermal stability, low cost, and improved stability. Effect

Inactive Publication Date: 2016-02-03
HWASU
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Problems solved by technology

Rare earth heat stabilizers have good thermal stability, but the early thermal stability is not high, and the initial coloring is poor, so they cannot be the main stabilizer alone, so their application and promotion are limited. The application of a single rare earth heat stabilizer is often difficult to meet the needs of PVC processing. Composite and multi-functional rare earth heat stabilizers have become the development trend according to the requirements of application performance

Method used

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Embodiment Construction

[0017] A PVC hydrotalcite composite environmental stabilizer, which is prepared from the following components by weight (kg): modified magnesium aluminum hydrotalcite 27, tin octyl mercaptide 1, lanthanum laurate 8, triphenyl phosphite 2. Zinc stearate 5, stearic acid 3, epoxy soybean oil 3, diisononyl phthalate 22, carbitol 5, o-hydroxybenzophenone 3, heavy calcium carbonate 14,

[0018] The preparation method is as follows:

[0019] (1) Preparation of modified hydrotalcite:

[0020] a. Add a certain amount of Mg(NO3)2·6H2O and Al(NO3)3·9H2O into water to form a salt solution with a total molar concentration of 0.6mol / L, and add a certain amount of NaOH and Na2CO3 into deionized water to form The total molar concentration is 0.6mol / L alkali solution, drop the alkali solution into the salt solution at a speed of 1-2 drops / s, N 2 Stir vigorously under protection, keep the constant temperature at 38-42°C, keep the pH value between 9.5 and 10, stir for 1-1.5h after the dropwise...

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Abstract

The present invention provides a hydrotalcite composite environmental protection stabilizer for PVC, wherein the hydrotalcite composite environmental protection stabilizer is prepared from the following raw materials by weight: 20-30 parts of modified magnesium aluminum hydrotalcite, 10-12 parts of octyl tin mercaptide, 6-9 parts of lanthanum laurate, 1-3 parts of triphenyl phosphite, 3-6 parts of zinc stearate, 2-4 parts of stearic acid, 2-4 parts of epoxidized soybean oil, 20-24 parts of diisononyl phthalate, 5-6 parts of carbitol, 2-3 parts of o-hydroxybenzophenone, and 10-15 parts of heavy calcium carbonate. According to the present invention, the PVC stabilizer has characteristics of good thermal stability, good processing performance, environmental protection, no toxicity, low cost, good plasticity and balance torque reducing during the PVC processing process, and low cost.

Description

technical field [0001] The invention relates to the field of PVC additives, in particular to a PVC hydrotalcite composite environmental-friendly stabilizer and a preparation method thereof. Background technique [0002] With its superior physical properties and low cost, PVC is widely used in chemical industry, materials, machinery, agriculture, daily necessities and other fields, especially in the field of plastics, and is known as one of the five general-purpose plastics. However, PVC has a very important defect, that is, it is easy to decompose and generate HCl gas during thermal processing, and self-catalysis leads to severe degradation of PVC, which affects various properties of PVC products, such as discoloring PVC products or reducing its mechanical properties. In order to overcome this defect of PVC, it is mainly to add an appropriate amount of stabilizer during the thermal processing of PVC. [0003] The only heat stabilizers that are generally industrialized now a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K13/06C08K9/04C08K3/28C08K5/092C08K5/526C08K5/098C08K5/58C08K5/09
Inventor 王圣茂丘永桂宋开生高旭李毅徐明肖独山孙荣兴
Owner HWASU
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