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High-transmittance weather-proof polycarbonate composite material for LED lampshade processing

An LED lampshade and polycarbonate technology, which is applied in the field of high light-transmitting and weather-resistant polycarbonate composite materials for LED lampshade processing, can solve the problem of reducing the impact resistance of polycarbonate, shortening the service life of polycarbonate, and weakening weather resistance, etc. problems, to achieve the effect of enhancing load capacity, improving load rate, and long weather resistance

Active Publication Date: 2018-12-11
JIANGSU SONGSHANG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of weather-resistant agents will reduce the impact resistance of polycarbonate, and at the same time reduce the light transmittance
Moreover, organic weather-resistant agents are often used in this field at present. Although this type of weather-resistant agent is added in a small amount, has good blending compatibility with polycarbonate, and has excellent weather resistance in a short period of time, the weather resistance stability is poor, and the weather resistance decreases with time. The extension of time gradually weakens or even disappears, thereby shortening the service life of polycarbonate products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Activation of molecular sieve raw powder: first place 4A molecular sieve raw powder in an oven at 100-105°C to dry to constant weight, and roast at 550°C for 2 hours to obtain activated molecular sieve raw powder;

[0031] (2) Preparation of carrier: Disperse 50g activated molecular sieve former powder in dehydrated alcohol, then add 8g allyl glycidyl ether, 10g magnesium dimethacrylate and 0.5g initiator azobisisobutyronitrile, then heat Insulate and stir the reaction in the reflux state. After the polymerization reaction, continue to reflux and stir for 30 minutes. The resulting mixture is concentrated under reduced pressure to recover ethanol. The concentrated residue is washed with water to remove unreacted monomers, and dried in an oven at 100-105°C until Weight, the obtained solid is made into fine powder by ultrafine pulverizer, and the carrier is obtained;

[0032] (3) Preparation of weather resistance agent: disperse 50g of the prepared carrier in absolute ...

Embodiment 2

[0035] (1) Activation of molecular sieve raw powder: first place 4A molecular sieve raw powder in an oven at 100-105°C to dry to constant weight, and roast at 550°C for 2 hours to obtain activated molecular sieve raw powder;

[0036](2) Preparation of carrier: Disperse 50g activated molecular sieve former powder in dehydrated alcohol, then add 8g allyl glycidyl ether, 15g magnesium dimethacrylate and 0.5g initiator azobisisobutyronitrile, then heat Insulate and stir the reaction in the reflux state. After the polymerization reaction, continue to reflux and stir for 30 minutes. The resulting mixture is concentrated under reduced pressure to recover ethanol. The concentrated residue is washed with water to remove unreacted monomers, and dried in an oven at 100-105°C until Weight, the obtained solid is made into fine powder by ultrafine pulverizer, and the carrier is obtained;

[0037] (3) Preparation of weathering agent: Disperse 50g of the prepared carrier in absolute ethanol, ...

Embodiment 3

[0040] (1) Activation of molecular sieve raw powder: first place 4A molecular sieve raw powder in an oven at 100-105°C to dry to constant weight, and roast at 550°C for 2 hours to obtain activated molecular sieve raw powder;

[0041] (2) Preparation of carrier: Disperse 50g activated molecular sieve former powder in dehydrated alcohol, then add 8g allyl glycidyl ether, 15g magnesium dimethacrylate and 0.5g initiator azobisisobutyronitrile, then heat Insulate and stir the reaction in the reflux state. After the polymerization reaction, continue to reflux and stir for 30 minutes. The resulting mixture is concentrated under reduced pressure to recover ethanol. The concentrated residue is washed with water to remove unreacted monomers, and dried in an oven at 100-105°C until Weight, the obtained solid is made into fine powder by ultrafine pulverizer, and the carrier is obtained;

[0042] (3) Preparation of weathering agent: Disperse 50g of the prepared carrier in absolute ethanol,...

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Abstract

The invention discloses a high-transmittance weather-proof polycarbonate composite material for LED lampshade processing and relates to the technical field of polycarbonate composite materials. The high-transmittance weather-proof polycarbonate composite material is prepared from the following raw materials in parts by weight: 80-100 parts of polycarbonate, 5-10 parts of ethylene-methyl acrylate polymer, 5-10 parts of polytetrafluoroethylene ultrafine powder, 1-5 parts of gaseous silicon dioxide, 1-5 parts of white polymeric aluminum, 0.5-2 parts of weather-proof agent and 0.2-1 part of antioxidant. The polycarbonate composite material prepared according to the invention has high transmittance, weather fastness and impact resistance, excellent processing and molding effect, full-light transmittance above 93%, notch impact strength above 750J / m and capability of enduring long-term solar radiation and preventing LED lampshade from ageing and becoming crispy so as to guarantee the use quality of the LED lampshade and prolong the service life of the LED lampshade.

Description

Technical field: [0001] The invention relates to the technical field of polycarbonate composite materials, in particular to a polycarbonate composite material with high light transmission and weather resistance for processing LED lampshades. Background technique: [0002] Polycarbonate, referred to as PC, is a widely used engineering plastic. It has the characteristics of high transparency, high toughness, high heat resistance, and high strength. It has great advantages in the LED lighting lampshade industry. However, when unmodified polycarbonate is used as a lampshade, its weather resistance is poor, and it is easy to cause the lampshade to age and become brittle under long-term sunlight. [0003] In order to improve the weather resistance of polycarbonate, the most convenient and effective method is to add weather resistance agent. However, the addition of weather-resistant agents will reduce the impact resistance of polycarbonate, and at the same time reduce the light t...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L23/08C08L27/18C08L77/04C08K9/04C08K3/36C08K3/16C08K9/12C08K3/22
CPCC08K2003/2296C08K2201/011C08L69/00C08L2201/08C08L2203/20C08L2205/035C08L23/0869C08L27/18C08L77/04C08K9/04C08K3/36C08K3/16C08K9/12C08K3/22
Inventor 汪涛
Owner JIANGSU SONGSHANG TECH CO LTD
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