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Flame-retardant light-stabilized polycarbonate and preparation method thereof

A polycarbonate and light-stabilized technology, which is applied in the field of plastic processing, can solve the problems of mechanical property degradation and product yellowing, and achieve the effects of optimizing flame retardancy, promoting adhesion, and good toughness

Active Publication Date: 2020-06-19
SHANGHAI LIANBO SECURITY EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under long-term sunlight exposure, PC materials will absorb ultraviolet light (UV) and cause photocracking, the product will turn yellow, and the mechanical properties will decline. Fire safety puts forward higher and higher requirements, and in recent years, research on higher-level flame retardancy of PC has become increasingly active

Method used

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  • Flame-retardant light-stabilized polycarbonate and preparation method thereof

Examples

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preparation example Construction

[0026] The preparation method of above-mentioned flame-retardant light stable polycarbonate, it comprises the following steps:

[0027] Add polycarbonate, composite flame retardant, light stabilizer, composite antioxidant, lubricant and dispersant into a high-speed mixer and mix thoroughly for 15 to 30 minutes to form a material;

[0028] The material is fed into a twin-screw extruder for melting and mixing, and then extruded, cooled, granulated, and dried.

Embodiment 1

[0031] Prepare raw materials according to the raw material formula, including polycarbonate 84%, composite flame retardant 6%, light stabilizer 8%, composite antioxidant 0.4%, paraffin 0.8%, polyvinylpyrrolidone and oleic acid according to mass percentage 0.8% of the mixture; the composite flame retardant contains expandable graphite, nano-carbonyl iron powder, zinc borate, graphene and silane coupling agent in a weight ratio of 20:5:20:4:15, and the nano-carbonyl iron powder The diameter is 20nm, and the light stabilizer contains zinc oxide, benzophenone ultraviolet absorber and bis(3,5-di-tert-butyl-4-hydroxybenzylphosphonic acid monoethyl ester) nickel; the compound antioxidant contains 2,6-di-tert-butyl-4-methylphenol and trioctyl phosphite in a weight ratio of 1:1. Add the raw materials prepared above into a high-speed mixer and mix them thoroughly for 30 minutes to form a material; put the material into a twin-screw extruder for melting and mixing, then extrude, cool, gr...

Embodiment 2

[0033] Prepare raw materials according to the raw material formula, including 90% polycarbonate, 6.8% composite flame retardant, 2% light stabilizer, 0.5% composite antioxidant, 0.2% paraffin, polyvinylpyrrolidone and oleic acid according to mass percentage 0.8% of the mixture; the composite flame retardant contains expandable graphite, nano-carbonyl iron powder, zinc borate, graphene and silane coupling agent in a weight ratio of 30:10:30:3:30, and the nano-carbonyl iron powder The diameter is 80nm, and the light stabilizer contains zinc oxide, benzophenone ultraviolet absorber and bis(3,5-di-tert-butyl-4-hydroxybenzylphosphonic acid monoethyl ester) nickel; the compound antioxidant contains 2,6-di-tert-butyl-4-methylphenol and bis(3,5-di-tert-butyl-4-hydroxyphenyl)sulfur in a weight ratio of 1:1 Ether mixtures and trioctyl phosphite. Add the raw materials prepared above into a high-speed mixer and mix them thoroughly for 27 minutes to form a material; put the material into ...

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Abstract

The invention provides anti-flaming light-stability polycarbonate and relates to the field of plastic processing. Mixed materials prepared according to a raw material formula are melt-mixed, extruded, cooled, pelletized and dried, and anti-flaming light-stability polycarbonate is prepared. The raw materials comprise, by mass, 80-90% of polycarbonate, 3-10% of composite flame retardant, 2-8% of light stabilizer, 0.2-1.5% of complex antioxygen, 0.2-1% of lubricant and 0.5-2% of dispersant. The complex antioxygen comprises expansible graphite, nano carbonyl iron powder, zinc borate, graphene and a silane coupling agent. The anti-flaming performance and light stability of anti-flaming light-stability polycarbonate are excellent. The invention further provides a preparation method of anti-flaming light-stability polycarbonate. The components are prepared according to the mass percents, the components are mixed to be uniform, the mixture is treated through a two-screw extruder, and the finished product is prepared. The preparation method is simple and environmentally friendly.

Description

technical field [0001] The invention relates to the field of plastic processing, and in particular to a flame-retardant light-stable polycarbonate and a preparation method thereof. Background technique [0002] Polycarbonate (polycarbonate, hereinafter referred to as PC) is an amorphous thermoplastic material with excellent mechanical properties, belonging to five general-purpose engineering plastics, namely polyamide (PA), polycarbonate (PC), polyoxymethylene (POM), modified One of polyphenylene oxide (MPPO), polybutylene terephthalate / polyethylene terephthalate (PBT / PET), used in glazing sheets, automotive supplies, electrical appliances Appliances, optical products, etc., its market demand is increasing. However, under long-term sunlight exposure, PC materials will absorb ultraviolet light (UV) and cause photocracking, the product will turn yellow, and the mechanical properties will decline. Fire safety puts forward higher and higher requirements. In recent years, resea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08L91/06C08L39/06C08K13/06C08K9/06C08K7/24C08K3/18C08K3/38C08K3/04
CPCC08K2201/003C08K2201/011C08L69/00C08L2201/02C08L2201/08C08L2205/03C08L91/06C08L39/06C08K13/06C08K9/06C08K7/24C08K3/18C08K2003/387C08K3/04
Inventor 黄星蔡俊东季伟瞿新昌
Owner SHANGHAI LIANBO SECURITY EQUIP
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