Heatproof oxidized polypropylene composite material with long oxidative induction time and preparation method of heatproof oxidized polypropylene composite material

A technique for oxidation induction time and oxidized polypropylene, which is applied in the field of heat-resistant oxidized polypropylene composite materials with long oxidation induction time and its preparation, which can solve the problem of unsatisfactory thermal and oxygen aging resistance of polypropylene composite materials and difficulty in meeting reliability requirements. Requirements, prone to problems such as thermal oxidation aging, to achieve excellent thermal oxidation induction time, convenient to meet industrial production, long thermal oxidation induction time effect

Inactive Publication Date: 2018-09-14
MIANYANG HONGQI NEW MATERIAL SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oxidation induction time (OIT) is a relative measure of the resistance to oxidative decomposition of stabilized materials; under normal pressure, oxygen or air atmosphere and specified temperature, the time for the material to undergo oxidation exotherm is measured by calorimetry; the shorter the oxidation induction time , the material is more prone to thermo-oxidative aging; in general, the oxidation induction time of PP does not exceed 30min at 200°C; however, for PP products that are used above room temperature for a long time, a longer oxidation induction time is required; If PP products are used at temperatures above 80°C and require a product life of more than 8 years, a long oxidation induction time is required, so that such products are not prone to thermo-oxidative aging, so as to meet market reliability requirements for products
In the prior art, PP can obtain a composite material with ideal comprehensive properties after being modified by inorganic fillers and reinforcing agents. However, due to the strong surface polarity of inorganic fillers and reinforcing agents and the presence of a large number of activated adsorption points on the surface, priority is given to Adsorption of other functional additives added in PP, especially the adsorption of primary antioxidants and secondary antioxidants; this phenomenon causes a part of antioxidants to be firmly bound by fillers and reinforcing agents and aggregated on their surface , the result is that part of PP cannot be effectively protected and will undergo thermal oxidation reaction under the action of oxygen, which makes the heat and oxygen aging resistance of polypropylene composite materials unsatisfactory, and it is difficult to use for a long time at around 140 ° C, especially at 200 ° C or more The oxidation induction time under high temperature test conditions is very short (the oxidation induction time of some polypropylene composite materials is only 2 minutes), which is difficult to meet the reliability requirements of the market for polypropylene composite products

Method used

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  • Heatproof oxidized polypropylene composite material with long oxidative induction time and preparation method of heatproof oxidized polypropylene composite material
  • Heatproof oxidized polypropylene composite material with long oxidative induction time and preparation method of heatproof oxidized polypropylene composite material
  • Heatproof oxidized polypropylene composite material with long oxidative induction time and preparation method of heatproof oxidized polypropylene composite material

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Experimental program
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Effect test

Embodiment 1

[0036] A heat-resistant oxidized polypropylene composite material with long oxidation induction time, composed of the following components in mass percentages: PP (abbreviation of polypropylene, the same below) 60%, talc 30%, mica 5%, toughening Agent ethylene-propylene binary copolymer 2%, γ-aminopropyl triethoxysilane 0.4%, tetra [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester 0.65 %, tris(2,4-di-tert-butylphenyl) phosphite 0.15%, distearyl thiodipropionate 0.4%, calcium stearate 0.2%, and epoxy resin 1.2%;

[0037] The preparation method of the heat-resistant oxidized polypropylene composite material with long oxidation induction time includes the following steps:

[0038] a. Ingredients: According to PP (abbreviation of polypropylene, the same below) 60%, talc 30%, mica 5%, toughening agent ethylene-propylene copolymer 2%, γ-aminopropyl triethoxysilane 0.4%, tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid] pentaerythritol ester 0.65%, tri...

Embodiment 2

[0047] A heat-resistant oxidized polypropylene composite material with long oxidation induction time, consisting of the following components in mass percentages: PP 60.0%, talc 30%, mica 4%, ethylene-propylene terpolymer 3%, γ -Aminopropyltriethoxysilane 0.4%, tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester 0.6%, tris(2,4-di-tert-butyl Phenyl) phosphite 0.2%, dilauryl thiodipropionate (or antioxidant DLTP) 0.3%, calcium stearate 0.2%, and epoxy resin 1.3%.

[0048] The preparation method of the heat-resistant oxidized polypropylene composite material with long oxidation induction time includes the following steps:

[0049] a. Ingredients: According to PP 60.0%, talc 30%, mica 4%, ethylene-propylene terpolymer 3%, γ-aminopropyl triethoxysilane 0.4%, tetra[β-(3,5- Di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol 0.6%, tris(2,4-di-tert-butylphenyl) phosphite 0.2%, dilauryl thiodipropionate 0.3%, The mass percentages of 0.2% calcium stear...

Embodiment 3

[0058] A heat-resistant oxidized polypropylene composite material with long oxidation induction time, composed of the following components in mass percentages: PP 60.0%, talc 29%, short glass fiber 5%, polyolefin elastomer 3%, γ- Aminopropyl triethoxysilane 0.4%, β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate 0.6%, tris(2,4-di-tert-butyl) Phenyl) phosphite 0.2%, dilauryl thiodipropionate (or antioxidant DLTP) 0.35%, calcium stearate 0.2%, and epoxy resin 1.25%.

[0059] The preparation method of the heat-resistant oxidized polypropylene composite material with long oxidation induction time includes the following steps:

[0060] a. Ingredients: According to PP 60.0%, talc 29%, short glass fiber 5%, polyolefin elastomer 3%, γ-aminopropyl triethoxysilane 0.4%, β-(3,5-di-tert-butyl 4-hydroxyphenyl) octadecyl propionate 0.6%, tris(2,4-di-tert-butylphenyl) phosphite 0.2%, dilauryl thiodipropionate (or anti- Oxygen agent DLTP) 0.35%, calcium stearate 0.2%, and epoxy resin 1.25% by mas...

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Abstract

The invention discloses a heatproof oxidized polypropylene composite material with long oxidative induction time. The heatproof oxidized polypropylene composite material is characterized by being prepared from, by mass, 58-62% of polypropylene, 28-32% of inorganic filler, 2-5% of a reinforcing agent, 0.1-0.5% of a silane coupling agent, 2-3% of a toughening agent, 0.4-0.8% of a main anti-oxidationadditive, 0.15-0.9% of an auxiliary anti-oxidation additive, 0.1-0.4% of a synergist and 0.8-1.5% of a hyperdispersant, wherein epoxy resin serves as the hyperdispersant. The preparation method includes: well mixing the inorganic filler, the silane coupling agent and the hyperdispersant into a mixture; well mixing other components in a mixer, adding the mixture, well mixing, adding into a double-screw extruder, and subjecting to melt mixing, extrusion and granulation to obtain the composite material. The composite material is long in oxidative induction time and applicable to plastic fittingswith thin wall characteristics.

Description

Technical field [0001] The invention belongs to a composite material containing a polymer compound and its preparation, and relates to a heat-resistant oxidized polypropylene composite material with long oxidation induction time and a preparation method thereof. The heat-resistant oxidized polypropylene composite material with long oxidation induction time prepared by the present invention is particularly suitable for plastic parts with thin-wall characteristics, such as automobile air-conditioning assemblies, lighting, household appliances and long-term heat-resistant parts. Background technique [0002] Polypropylene (PP resin, abbreviated as PP, English name Polypropylene), is a kind of thermoplastic resin made by polymerization of propylene, and is widely used. Oxidation induction time (OIT) is a relative measure of the resistance of stabilized materials to oxidative decomposition; under normal pressure, oxygen or air atmosphere and specified temperature, calorimetry is used ...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/16C08L23/08C08L63/00C08K13/06C08K9/06C08K3/34C08K5/134C08K5/526C08K5/098C08K7/14
CPCC08K2201/014C08L23/12C08L2201/08C08L2205/03C08L23/16C08L23/0815C08L63/00C08K13/06C08K9/06C08K3/34C08K5/1345C08K5/526C08K5/098C08K7/14
Inventor 曾学良汪学军曾尔华徐大勇
Owner MIANYANG HONGQI NEW MATERIAL SCI & TECH
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