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Calcium zinc stabilizer for PVC pipes and preparation method of calcium zinc stabilizer

A calcium-zinc stabilizer and PVC pipe technology, applied in the field of stabilizers, can solve problems affecting product color, redness, etc., and achieve the effects of improving gloss and transparency, improving thermal stability, and increasing strength

Active Publication Date: 2019-10-25
浙江中财管道科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome the problem that dibenzoylmethane in the calcium stabilizer in the prior art complexes with ferric ions in the iron vacuum tank and turns red and affects the color of the product, and provides a calcium stabilizer for PVC pipes. Zinc stabilizer, the present invention combines the dibenzoylmethane in the stabilizer with the quaternary ammonium salt, because the nitrogen atom of the quaternary ammonium salt is connected with four alkyl groups, with a positive charge of one unit, so that the dibenzoylmethane It is positively charged with the quaternary ammonium salt complex, and the positively charged dibenzoylmethane and quaternary ammonium salt complexes repel the positively charged ferric ions, thereby preventing dibenzoylmethane from complexing with ferric ions Synthesize into a red complex, avoiding the red color of PVC pipes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of dibenzoylmethane-quaternary ammonium salt chitosan carrier complex comprises the following steps:

[0027] Add carboxymethyl chitosan to deionized water and dissolve to prepare a concentration of 3wt% carboxymethyl chitosan solution; add dibenzoylmethane to a mass concentration of 15wt% sodium hydroxide solution to dissolve and prepare a concentration of 8wt% Dibenzoylmethane solution, add ethyl acetate to the dibenzoylmethane solution, the addition of ethyl acetate is 4wt% of the dibenzoylmethane solution, stir to obtain a mixed solution; drop carboxymethyl chitosan Put into the mixed solution and stir simultaneously, form chitosan microsphere, the dripping amount of carboxymethyl chitosan is the 20wt% of mixed solution; After the chitosan microsphere is cleaned to neutrality with deionized water, add concentration is Carry out crosslinking in 5wt% sodium tripolyphosphate solution for 4 hours, filter and dry to obtain dibenzoylmethane-chitosan...

Embodiment 2

[0034] The preparation method of dibenzoylmethane-quaternary ammonium salt chitosan carrier complex comprises the following steps:

[0035] Carboxymethyl chitosan is added into deionized water and dissolved to prepare a concentration of 2wt% carboxymethyl chitosan solution; dibenzoylmethane is added to a mass concentration of 15wt% sodium hydroxide solution and dissolved to prepare a concentration of 6wt% Dibenzoylmethane solution, add ethyl acetate to the dibenzoylmethane solution, the addition of ethyl acetate is 3wt% of the dibenzoylmethane solution, stir to obtain a mixed solution; carboxymethyl chitosan is dropped Put into the mixed solution and stir simultaneously, form chitosan microsphere, the dripping amount of carboxymethyl chitosan is the 15wt% of mixed solution; After the chitosan microsphere is cleaned to neutrality with deionized water, add concentration is Carry out crosslinking in 5wt% sodium tripolyphosphate solution for 3 hours, filter, and dry to obtain dibe...

Embodiment 3

[0042] The preparation method of dibenzoylmethane-quaternary ammonium salt chitosan carrier complex comprises the following steps:

[0043] Carboxymethyl chitosan is added into deionized water and dissolved to prepare a concentration of 3wt% carboxymethyl chitosan solution; dibenzoylmethane is added to a mass concentration of 20wt% sodium hydroxide solution and dissolved to prepare a concentration of 10wt% Dibenzoylmethane solution, add ethyl acetate to the dibenzoylmethane solution, the addition of ethyl acetate is 3wt% of the dibenzoylmethane solution, stir to obtain a mixed solution; carboxymethyl chitosan is dropped Put into the mixed solution and stir simultaneously, form chitosan microsphere, the dripping amount of carboxymethyl chitosan is the 25wt% of mixed solution; After the chitosan microsphere is cleaned to neutrality with deionized water, add concentration is Carry out crosslinking in 5wt% sodium tripolyphosphate solution for 5h, filter and dry to obtain dibenzoyl...

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PUM

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Abstract

The invention relates to the technical field of stabilizers, and discloses a calcium zinc stabilizer for PVC pipes and a preparation method of the calcium zinc stabilizer. The calcium zinc stabilizeris prepared from the following components in parts by weight: 10-30 parts of calcium stearate, 10-30 parts of zinc stearate, 10-20 parts of hydrotalcite, 10-15 parts of zeolite, 1-5 parts of calcium acetylacetonate, 1-5 parts of a dibenzoylmethane-quaternary ammonium salt chitosan carrier complex, 1-3 parts of pentaerythritol, 1-3 parts of phosphite, and 1-3 parts of bisphenol A. According to thecalcium zinc stabilizer for the PVC pipes and the preparation method of the calcium zinc stabilizer, dibenzoylmethane and a quaternary ammonium salt in the stabilizer are compounded to make a compoundof the dibenzoylmethane and the quaternary ammonium salt show positive electricity, and the compound of the dibenzoylmethane and the quaternary ammonium salt with positive electricity repels ferric ions with positive electricity so as to prevent the dibenzoylmethane and the ferric ions from being complexed into a red complex and avoid the PVC pipes from showing red.

Description

technical field [0001] The invention relates to the technical field of stabilizers, in particular to a calcium-zinc stabilizer for PVC pipes and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is one of the five general-purpose plastics. Its advantage is that PVC products are widely used, mainly used in industry, construction, agriculture and other fields. However, the disadvantages are also obvious. Afterwards, the color of the product becomes darker, and various performance indicators decrease, so it cannot be processed directly. Therefore, a heat stabilizer must be added during the processing to improve the aging performance. [0003] At present, the commonly used heat stabilizers mainly include inorganic lead salts, metal soaps and organic tin, etc., but the inorganic lead salts are poisonous and the smell of organic tin is too heavy, which seriously limits the scope of application of PVC products. In order to improve people's health...

Claims

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Application Information

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IPC IPC(8): C08K13/06C08K5/098C08K9/12C08K5/19C08K5/07C08K3/22C08K7/26C08L27/06
CPCC08K3/22C08K5/07C08K5/098C08K5/19C08K7/26C08K9/12C08K13/06C08K2003/222C08K2003/2227C08K2201/014C08L27/06C08L2201/08C08L2203/18
Inventor 张长伟王百提俞杰
Owner 浙江中财管道科技股份有限公司