Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of preparation method of long-acting phosphite antioxidant

A technology of phosphite and antioxidant, which is applied in the field of preparation of long-acting phosphite antioxidant, can solve the problems of strong hygroscopicity and easy hydrolysis, so as to improve antioxidant, improve organic affinity, improve Effects of Thermal Stability and Service Life

Active Publication Date: 2021-03-09
RIANLON (ZHUHAI) NEW MATERIAL CO LTD +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of strong hygroscopicity and easy hydrolysis of phosphite antioxidants in the prior art, the object of the invention is to provide a preparation method of long-acting phosphite antioxidants, comprising the following steps: A long-acting phosphite antioxidant is obtained by mixing an antioxidant with a hydrolysis-resistant agent;

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of long-acting phosphite antioxidant
  • A kind of preparation method of long-acting phosphite antioxidant

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] A preparation method of a long-acting phosphite antioxidant, comprising the following steps: mixing the phosphite antioxidant and a hydrolysis-resistant agent to prepare the long-acting phosphite antioxidant;

[0020] The hydrolysis-resistant agent is a modified hydrotalcite, specifically a hydrotalcite modified by a quaternary ammonium salt type cationic surfactant.

[0021] In the present invention, the hydrotalcite is modified with a quaternary ammonium salt type cationic surfactant to obtain alkaline hydrotalcite, wherein the alkaline substance can neutralize the acidity such as phosphite and phenol produced after the hydrolysis of the phosphite antioxidant substances to avoid the occurrence of autocatalysis, achieve the purpose of hydrolytic stability, and make it more effective; at the same time, it improves the organic affinity and compatibility of phosphite antioxidants, and reduces the problem of easy agglomeration.

[0022] In the present invention, the quater...

Embodiment A- Embodiment H

[0040] Embodiment A-the preparation of embodiment H hydrolysis-resistant agent

[0041] Dissolve the cationic surfactant: tetradecyltrimethylammonium chloride in a certain amount of deionized water, add a certain amount of magnesium aluminum hydrotalcite after dissolving, add it into the reaction vessel and stir at constant temperature; mix the stirred Liquid filtration, wash the filter cake with deionized water; dry the washed filter cake in an oven at 105°C, and obtain modified hydrotalcite after drying.

[0042] A total of 8 examples from Example A to Example H were set up, and the three main process factors of the amount of cationic surfactant, the volume of deionized water, the modification time, and the modification temperature were respectively controlled for experiments. Activation index of hydrotalcite (determination of LDH activation index according to Ministry of Chemical Industry standard HG T2567-2006). The results are shown in Table 1.

[0043] Table 1. Main pr...

Embodiment 1

[0049] A preparation method of long-acting bis(2,4 di-tert-butylphenyl) pentaerythritol diphosphite, comprising the steps of:

[0050] Take 30g of bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite commercially available and 0.15g of the hydrolysis-resistant agent prepared in Example G, add it to a ball mill for ball milling, and make it evenly mixed, and control the speed of the ball mill At 1000 rpm, grind for 2 hours. After mixing evenly, a phosphite antioxidant is prepared. The particle size D50 of the phosphite powder after grinding: 150±10um.

[0051] The phosphite antioxidant sample prepared in the above examples was analyzed by high-pressure liquid chromatography, and its purity was 98.18%, and its acid value was 0.07 mgKOH / g in titration analysis.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
acid valueaaaaaaaaaa
acid valueaaaaaaaaaa
acid valueaaaaaaaaaa
Login to View More

Abstract

The invention relates to a long-acting phosphite antioxidant and a preparation process thereof. The antioxidant is prepared by the following method: the long-acting phosphite antioxidant is prepared by mixing the phosphite antioxidant and a hydrolysis-resistant agent The hydrolysis-resistant agent is a modified hydrotalcite, specifically a hydrotalcite modified by a quaternary ammonium salt type cationic surfactant. The invention utilizes alkaline substances and anti-hydrolysis agents to neutralize the acidic substances in the phosphite system, so as to avoid the occurrence of autocatalysis, achieve the purpose of hydrolysis stability, and improve its thermal stability and service life. Surfactant modification to improve organic affinity.

Description

technical field [0001] The invention relates to the field of chemical synthesis, in particular to a preparation method of a long-acting phosphite antioxidant. Background technique [0002] Phosphorus-containing antioxidants have received widespread attention at home and abroad in recent years, mainly phosphites. This type of antioxidant is the main variety of antioxidants and auxiliary antioxidants for plastic processing. They can be used as plastic additives to effectively Improve the processing stability, heat resistance stability, color improvement and weather resistance of the resin. Among them, antioxidants 168, 626, and TNP are representative varieties of phosphite antioxidants. [0003] Since the 1970s, with the wide application of high-performance hindered amine light stabilizers, phosphite as an auxiliary antioxidant for polymer materials will not have harmful "negative effects" with hindered amine light stabilizers, and has shown good synergistic effect. For thi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/527C08K9/04C08K3/26
CPCC08K3/26C08K5/527C08K9/04
Inventor 张兵兵向莉李墉孙春光范小鹏刘国安李海平
Owner RIANLON (ZHUHAI) NEW MATERIAL CO LTD