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A composition for use in polyolefins

A composition and polyolefin technology, applied in the polymer field, can solve the problems of increasing the yellow index of polyolefin and affecting the appearance of polyolefin products, and achieve the effects of preventing discoloration, improving durability and aesthetics, and eliminating chromophores

Active Publication Date: 2017-09-15
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, hindered phenolic antioxidants are easy to react with free radicals to form intermediate products of quinone compounds, and quinone compounds have chromophoric groups, which will increase the yellowness index of polyolefins and affect the appearance of polyolefin products

Method used

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  • A composition for use in polyolefins
  • A composition for use in polyolefins
  • A composition for use in polyolefins

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Experimental program
Comparison scheme
Effect test

Embodiment 15

[0040] The composition preparation part of embodiment 15 is carried out according to the following contents:

[0041] The hindered phenol, phosphite and stearate are uniformly mixed according to a certain mass ratio to obtain the composition.

[0042] Embodiment 1-15 carries out according to the following content after preparing composition:

[0043] The obtained composition was added to polyolefin and mixed evenly, and extruded three times in the screw according to the twin-screw extrusion test, and the melt index and yellowness index of polyolefin were measured.

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Abstract

The invention discloses a composition for polyolefin. The composition is prepared from raw materials hindered phenol, phosphite, stearate and sodium borohydride, wherein a mass ratio of the raw materials is: m hindered phenol:m phosphate:m stearate: m sodium borohydride=1:(1 to 4):(0.5 to 1.5):(0.5 to 3). When the composition is used for the polyolefin, thermal stability of the polyolefin can be improved, a chromophoric group can be eliminated, a polyolefin product can be prevented from being discolored, and durability and aesthetic property of the polyolefin product can be improved.

Description

technical field [0001] The invention belongs to the field of polymers, in particular to a composition used in polyolefins. Background technique [0002] Polyolefins, including polyethylene, polypropylene and their copolymers, are exposed to light and heat during thermal processing and long-term use, and will be oxidized by oxygen in the air. The mechanical properties of polyolefins will be lost, and the appearance will become unattractive. Therefore, antioxidants need to be added to improve the thermal stability of polyolefins. [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-hydroxyphenyl Stearyl propionate (trade name: Antioxidant 1076), 1,3,5-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/06C08L23/08C08K13/02C08K5/134C08K5/526C08K5/098C08K3/38C08K3/22C08K3/26
CPCC08K3/22C08K3/26C08K3/38C08K5/098C08K5/1345C08K5/526C08K13/02C08K2003/2296C08K2201/014C08L2201/08C08L23/12C08L23/06C08L23/0815
Inventor 李磊李化毅黄河张瑜袁炜胡友良
Owner CHNA ENERGY INVESTMENT CORP LTD