Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Macromolecule hindered phenol antioxidant, preparation method of macromolecule hindered phenol antioxidant, and application of macromolecule hindered phenol antioxidant

A technology of hindered phenols and antioxidants, applied in the field of antioxidants, can solve the problems of low antioxidant components, further improvement of antioxidant performance, large addition amount, etc., to achieve large molecular weight, facilitate industrial production, and easy process control Effect

Inactive Publication Date: 2014-09-10
SOUTH CHINA UNIV OF TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, each molecular chain of this kind of polymer antioxidant has only two effective antioxidant groups, the effective antioxidant components are low, and the addition amount is large, and its antioxidant performance needs to be further improved.

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
  • Macromolecule hindered phenol antioxidant, preparation method of macromolecule hindered phenol antioxidant, and application of macromolecule hindered phenol antioxidant
  • Macromolecule hindered phenol antioxidant, preparation method of macromolecule hindered phenol antioxidant, and application of macromolecule hindered phenol antioxidant
  • Macromolecule hindered phenol antioxidant, preparation method of macromolecule hindered phenol antioxidant, and application of macromolecule hindered phenol antioxidant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Synthesis of sulfur-containing polyhydroxy polybutadiene: Add 10.00 g of hydroxyl-terminated polybutadiene (Craigville (Guangzhou) Chemical Co., Ltd., Brand LBH2000, the number average molecular weight is 2.00×10 3, the hydroxyl value is 0.91mmol / g) and 5.00g tetrahydrofuran, the temperature is raised to 60°C, and magnetic stirring is used to completely dissolve the hydroxyl-terminated polybutadiene (HTPB). Dissolve 0.200g of azobisisobutyronitrile and 2.00g of 2-mercaptoethanol in 10.00g of tetrahydrofuran, and add them dropwise to the above reactants within 30min, heat and react at 60°C for 3 hours, then transfer the reaction solution to the separatory In the funnel, after cooling to 25°C, add excess ice methanol to the separatory funnel and shake, precipitate and separate into layers to obtain the crude product, then undergo dissolution-precipitation-separation for 5 times, and vacuum-dry at 60°C for 12h Sulfur-containing polyhydroxy polybutadiene is obtained. ...

Embodiment 2

[0036] The difference between this example and Example 1 is that the amount of 2-mercaptoethanol in step (1) is changed to 5.00g, the amount of azobisisobutyronitrile is changed to 0.300g, the reaction time is 5h, and the constant temperature reaction temperature is 70°C . The hydroxyl value of the synthesized sulfur-containing polyhydroxy polybutadiene is 7.24mmol / g. In step (2), the molar ratio of isophorone diisocyanate to 2,2′-thiobis(4-methyl-6-tert-butylphenol) is changed to 1:1.5, that is, the ratio of isophorone diisocyanate The dosage was changed to 16.10g, and the dosage of 2,2′-thiobis(4-methyl-6-tert-butylphenol) was changed to 38.88g. by FT-IR and 1 Analysis such as H-NMR can show that the macromolecule hindered phenolic antioxidant has been successfully prepared.

[0037] The thermo-oxidative aging resistance and extraction resistance of the vulcanizate are shown in Table 1. It can be seen from Table 1 that the k value of natural rubber vulcanizate is 0.72 af...

Embodiment 3

[0039] The difference between this example and Example 1 is that the dosage of 2-mercaptoethanol in step (1) was changed to 1.00 g, the amount of azobisisobutyronitrile was changed to 0.050 g, the reaction time was 2 hours, and the constant temperature reaction temperature was 50°C. The hydroxyl value of the synthesized sulfur-containing polyhydroxy polybutadiene is 1.32mmol / g. Correspondingly, in step (2), the amount of isophorone diisocyanate was changed to 2.93 g, and the amount of 2,2′-thiobis(4-methyl-6-tert-butylphenol) was changed to 9.45 g. by FT-IR and 1 Analysis such as H-NMR can show that the macromolecule hindered phenolic antioxidant has been successfully prepared.

[0040] The thermo-oxidative aging resistance and extraction resistance of the vulcanizate are shown in Table 1. It can be seen from Table 1 that the k value of natural rubber vulcanizate after 48 hours of thermal oxygen accelerated aging at 100°C is 0.54; after soaking in 70°C water for 48 hours, an...

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
polydispersity indexaaaaaaaaaa
Login to View More

Abstract

The invention discloses a macromolecule hindered phenol antioxidant, a preparation method of the macromolecule hindered phenol antioxidant, and application of the macromolecule hindered phenol antioxidant. Under the action of thermal initiators, a sulfydryl-alkene click reaction is generated between sulfydryl in functional mercaptan and double bonds in hydroxyl-terminated polybutadiene under the temperatures of 50-70 DEG C to prepare sulfur-containing polyhydroxy polybutadiene; then under the temperatures of 30-50 DEG C, hydroxy in the sulfur-containing polyhydroxy polybutadiene reacts with secondary-position isocyanato in isophorone diisocyanate to obtain additive products secondary-position isocyanato-containing isocyanato; and then under the temperatures of 60-80 DEG C, the additive products react with bisphenols antioxidant to prepare the macromolecule hindered phenol antioxidant. The macromolecule hindered phenol antioxidant is good in thermo-oxidative aging performance, high in efficiency, and good in anti-extraction performance, and can be widely used in anti-aging of materials such as rubber and plastic.

Description

technical field [0001] The invention relates to the field of antioxidants, in particular to a macromolecule hindered phenolic antioxidant. The invention also relates to the preparation method and application of the macromolecule hindered phenolic antioxidant. Background technique [0002] During storage, processing, and use, polymer materials are subjected to heat, oxygen, ozone, etc., which will change the structure and performance of the material and gradually lose its use value. This phenomenon is called aging of polymer materials. Especially for rubber with a large number of double bonds in the molecular chain, the problem of thermo-oxidative aging is more prominent. In order to inhibit the aging of polymer materials, maintain the properties of materials, and prolong the life of materials, the most common and effective method is to add antioxidants to materials. Antioxidants mainly include amines, phenols, phosphorus and sulfur. Among them, the application of amine an...

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): C08G18/75C08G18/62C08G18/32C08F36/06C08F8/34C08L75/04C08L7/00C08L9/06C08L9/00C08J3/24
Inventor 曾幸荣吴文剑李红强赖学军郭建华王永洪李峰任晓康
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com