Novel molecular sieve PVC composite stabilizing agent and its preparation method

A composite stabilizer and molecular sieve technology, applied in the field of new molecular sieve PVC composite stabilizer and its preparation, can solve the problems of poor coloring ability of composite lead salt stabilizer, poor compatibility of PVC base materials, and white spots in finished products, and achieve excellent results. Thermal stability, reducing dosage, improving thermal stability effect

Active Publication Date: 2012-05-30
慧科高新科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Composite lead salt stabilizers also have some disadvantages, such as poor dispersion, poor compatibility with PVC base materials, and often produce white spots in the finished product, seriously affecting the quality of profiles
Composite lead salt stabilizers also have problems such as poor coloring ability and low versatility

Method used

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  • Novel molecular sieve PVC composite stabilizing agent and its preparation method
  • Novel molecular sieve PVC composite stabilizing agent and its preparation method
  • Novel molecular sieve PVC composite stabilizing agent and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Roast kaolin at 550-650°C for 2-3 hours;

[0028] (2) mixed with soda ash, so that the molar ratio of the components in the solution is controlled at n(H 2 O) / n(Na 2 O) / n(SiO 2 )=1:1.5:2.5, then aged at 60°C for 2h;

[0029] (3) Crystallization under hydrothermal conditions at 90°C for 4 hours;

[0030] (4) Finally, it is separated by filtration, washed with deionized water until neutral, and then dried to obtain the synthetic product.

[0031] The prepared calcium stearate, zinc stearate, lubricant, surface modifier and auxiliary heat stabilizer are mixed, and then compounded with molecular sieves. The specific mixing method is as follows:

[0032] First add 30 parts of calcium stearate and 25 parts of zinc stearate into the reaction kettle and mix well. Take the mixed material, add it into a kneader, heat and stir, add 15 parts of pentaerythritol ester, knead at 100-110°C for 20 minutes, then add 10 parts of polyethylene wax and 15 parts of epoxidized soybean...

Embodiment 2、3

[0037] Add the above-mentioned molecular sieve stabilizer to 100 parts of PVC in the same amount, and then add 60 parts of diisooctyl phthalate (DOP), and then according to the national standard GB2113-82 "Plastic whiteness test method", the prepared three PVC plastics were tested for heat-resistant whiteness. It can be found from Table 3 that the prepared new molecular sieve PVC composite stabilizer has better thermal stability than the traditional stabilizer.

[0038] Table 2: Composite heat stabilizer composition formula

[0039]

[0040] Wherein: the lubricant is selected from polyethylene wax, monoglyceride or stearic acid; the surface modifier is selected from pentaerythritol ester or triphenyl phosphite; the auxiliary heat stabilizer is selected from epoxy soybean oil or dibenzoylmethane.

[0041] Table 3: The relative whiteness value (%) of the test piece tested in a whiteness meter tested with a standard whiteness board with a whiteness of 85%

[0042]

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Abstract

The invention relates to a novel molecular sieve PVC (polyvinyl chloride) composite stabilizing agent and its preparation method. The stabilizing agent is characterized by comprising the following raw materials by mass percent: 20-40% of calcium stearate; 15-25% of zinc stearate; 5-15% of a molecular sieve; 8-20% of a lubricating agent; 8-15% of a surface modification agent; and 5-15% of an auxiliary heat stabilizing agent. The preparation method has no pollution and low energy consumption. According to the national standard GB2113-82 ''test for whiteness of plastics'', the prepared novel modification composite stabilizing agent, compared with traditional stabilizing agents, has excellent thermal stability. And the prepared molecular sieve in the invention has a micropore structure, and diameters of the pores are uniform in size.

Description

technical field [0001] The invention belongs to the field of PVC processing, in particular to a novel molecular sieve PVC composite stabilizer and a preparation method thereof. Background technique [0002] As we all know, PVC is easy to decompose under processing temperature conditions, and a stabilizer must be added to make it process smoothly. In addition, when polyvinyl chloride is heated or exposed to ultraviolet radiation, it will also cause polymer degradation and de-HCl. Therefore, the use and processing of PVC must use stabilizers. Stabilizer is a chemical additive that can inhibit the degradation and discoloration of PVC caused by heat and light during processing and use. Stabilizers can be divided into five categories according to their chemical structures: base lead salt stabilizers, metal soaps, organotin compounds, organic stabilizers and composite stabilizers. [0003] Due to the advantages of easy-to-obtain raw materials, simple production process, low pri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K13/06C08K9/04C08K5/098C08K7/26
Inventor 唐守余
Owner 慧科高新科技股份有限公司
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