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Composition and application thereof for providing thermal stability to polymers

A composition and polymer technology, applied in the field of composition, can solve problems such as unsightly appearance and loss of mechanical properties of polymers

Active Publication Date: 2017-06-09
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During thermal processing and long-term use, the polymer will be oxidized by the oxygen in the air under the action of light and heat, the mechanical properties of the polymer will be lost, and the appearance will become unattractive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]pentaerythritol, tris[2.4-di-tert-butylphenyl]phosphite, calcium stearate and calcium sulfite , according to the mass ratio of 1:2:1.5:1.25 mixed evenly made.

[0040]Mix it uniformly as powder and add it to polypropylene in an amount of 1500ppm. After extruding through the screw for three times, the melt index of polypropylene is 14.8g / 10min, and the yellowness index is 6.5.

Embodiment 2

[0042] β-(3,5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate, tris[2.4-di-tert-butylphenyl] phosphite, calcium stearate and sulfurous acid Calcium is made by mixing evenly at a mass ratio of 1:3:1.5:1.75.

[0043] Mix it uniformly as powder and add it to polypropylene in an amount of 2000ppm. After extruding through the screw for three times, the melt index of polypropylene is 11.8g / 10min, and the yellowness index is 4.9.

Embodiment 3

[0045] Tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]pentaerythritol, bis(2,4-di-tert-butylphenol)pentaerythritol diphosphite, calcium stearate and Magnesium sulfite is made by mixing evenly at a mass ratio of 1:2.5:1:2.5.

[0046] Mix it uniformly as powder, add it to polypropylene in an amount of 1500ppm, and extrude through the screw three times, the melt index of polypropylene is 10.7g / 10min, and the yellowness index is 4.8.

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Abstract

The invention relates to a composition with the capability of providing the thermal stability for polymer and application of the composition. The composition is prepared from the following raw materials: (1) hindered phenol, (2) phosphate or thioester, (3) an acid-removing agent and (4) sulfite, bisulfate or sulfide, wherein the mass ratio of hindered phenol, phosphate or thioester, the acid-removing agent and sulfite, bisulfate or sulfide is 1:(1-4):(0.5-2):(0.5-3). The invention also provides the application of the composition serving as an antioxidant in polymer resin. The composition is capable of lowering the melt index of polyolefin, eliminating a quinones compound serving as an intermediate and lowering the yellow index of polyolefin.

Description

technical field [0001] The present invention relates to a composition, in particular to a composition for providing thermal stability to polymers. Background technique [0002] During thermal processing and long-term use, polymers will be oxidized by oxygen in the air under the action of light and heat, the mechanical properties of polymers will be lost, and the appearance will become unattractive. Therefore, it is necessary to add an antioxidant to improve the thermal stability of the polymer. [0003] Hindered phenolic antioxidants are widely used in polymers to reduce thermal-oxidative aging in polymer processing, reduce performance degradation of polymers in use, and prolong the service life of polymers. Commonly used hindered phenolic antioxidants are: tetrakis-[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol (trade name Antioxidant 1010), 4-hydroxyphenylpropane Stearyl acid ester (trade name Antioxidant 1076), 1,3,5-trimethyl-2,4,6-tris(3,5-di-t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K13/02C08K5/13C08K5/134C08K5/3492C08K5/375C08K5/17C08K5/526C08K5/523C08K5/372C08K3/30C08L23/00C08L67/00C08L59/00C08L75/04C08L77/00C08L69/00
Inventor 李化毅张瑜王柯胡友良
Owner INST OF CHEM CHINESE ACAD OF SCI
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