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A cnt composite branched core-shell structure acrylate and weather-resistant, anti-static and low-temperature resistant polycarbonate materials

An acrylate and core-shell structure technology, applied in the field of polymer materials, can solve the problems of less consideration of weather resistance, low temperature impact performance reduction, and no research on antistatic function of materials, so as to improve physical and chemical properties and electrical conductivity, and improve toughness and low temperature resistance, and the effect of shortening the recycling process

Active Publication Date: 2022-03-04
宁波坚锋新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the conventional toughened polycarbonate materials on the existing market are generally toughened with high-grade rubber powder, and the modification of weather resistance is less considered. Granules are used as raw materials, and the economic cost is high, which limits its scope of application to a certain extent; polycarbonate-organosilicon block copolymers are polymerized modified products that must be synthesized from petroleum-based chemical monomers, which is an unusable Materials obtained from renewable resources are not environmentally friendly and costly
[0005] The surface resistivity of polycarbonate is large, at 10 15 Ohm / sq or more, polycarbonate products are prone to static electricity during production, packaging, transportation and use, affecting production and processing, easy to vacuum during use, and even cause fire or explosion
[0006] The patent application document (CN109401265) discloses a weather-resistant and low-temperature resistant polycarbonate packaging material and its preparation method. The polycarbonate is used as raw material, supplemented with 3-12 parts of toughening agent, 0.1-1.2 parts of weather-resistant agent, 1-2 parts of flame retardant, 0.1-0.3 parts of antioxidant, 0.1-0.3 parts of lubricant, the examples obtained -40 ° C notched impact strength 30 ~ 40J / m, weather resistance test ΔE = 7 ~ 11.6 polycarbonate material, but does not involve the research on the antistatic function of the material; the patent application document (CN108912645A) discloses a polycarbonate blend material and preparation method with low temperature resistance and conductivity, which specifically discloses a conductive masterbatch of CNT composite SiPC, Then blend with polycarbonate to prepare a low-temperature-resistant conductive material, the low-temperature resistance of the material is provided by the SiPC base material, and the weight ratio of the SiPC masterbatch and polycarbonate is preferably (1-50): (99-50) , preferably (40-50): (60-50), indicating that as the content of SiPC in the composite material decreases, the low-temperature impact performance of the material will inevitably decrease

Method used

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  • A cnt composite branched core-shell structure acrylate and weather-resistant, anti-static and low-temperature resistant polycarbonate materials
  • A cnt composite branched core-shell structure acrylate and weather-resistant, anti-static and low-temperature resistant polycarbonate materials
  • A cnt composite branched core-shell structure acrylate and weather-resistant, anti-static and low-temperature resistant polycarbonate materials

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Effect test

Embodiment 1

[0058] The preparation method of the CNT composite branched core-shell structure acrylate of the present embodiment is:

[0059] S1. Add butyl acrylate, allyl methacrylate, anionic emulsifier sodium stearate, initiator potassium persulfate and crosslinking agent 1,4-butanediol diacrylate to deionized water, and butyl acrylate , allyl methacrylate, sodium stearate, potassium persulfate, 1,4-butanediol diacrylate and deionized water in a weight ratio of 150:0.06:2:0.7:0.7:45, heated in a water bath to React at 70°C, and mechanically stir at a speed of 200rpm during the reaction to make a core layer emulsion;

[0060] S2, the branched monomer methacrylic acid (the branched monomer is at least one of acrylate, methacrylic acid, glycidyl methacrylate, maleic acid, acrylamide), CNT, methyl methacrylate , sodium stearate, stirring and mixing, CNT is fully dispersed in the middle of the solution, and is prepared into a shell emulsion, and the weight ratio of branched monomer, CNT, me...

Embodiment 2

[0064] The preparation method of the CNT composite branched core-shell structure acrylate of the present embodiment is:

[0065] S1. Add butyl acrylate, allyl methacrylate, anionic emulsifier sodium lauryl sulfate, initiator potassium persulfate and crosslinking agent 1,4-butanediol diacrylate to deionized water, acrylic acid The weight ratio of butyl ester, allyl methacrylate, sodium lauryl sulfate, potassium persulfate, 1,4-butanediol diacrylate and deionized water is 200:0.05:3:0.5:0.5:50 , heated in a water bath to 65°C for reaction, and mechanically stirred while reacting at a stirring speed of 100rpm to make a nuclear layer emulsion;

[0066] S2. Stir and mix the branched monomer glycidyl methacrylate, CNT, methyl methacrylate, and sodium lauryl sulfate, so that the CNT is fully dispersed in the solution, and prepared into a shell emulsion, branched monomer, The weight ratio of CNT, methyl methacrylate and sodium lauryl sulfate is 0.07:30:50:1.5, and the CNT is made of ...

Embodiment 3

[0070] The preparation method of the CNT composite branched core-shell structure acrylate of the present embodiment is:

[0071] S1. Add butyl acrylate, allyl methacrylate, anionic emulsifier calcium dodecylbenzenesulfonate, initiator potassium persulfate and crosslinking agent 1,4-butanediol diacrylate to deionized water , the weight ratio of butyl acrylate, allyl methacrylate, calcium dodecylbenzenesulfonate, potassium persulfate, 1,4-butanediol diacrylate and deionized water is 300:0.07:2.5:0.6 :0.6:50, the water bath is heated to 80 ℃ to react, and mechanical stirring is carried out while reacting, and the stirring speed is 250rpm, and the nuclear layer emulsion is made;

[0072] S2. Stir and mix the branched monomer maleic acid, CNT, methyl methacrylate, and calcium dodecylbenzenesulfonate, so that the CNT is fully dispersed in the solution, and prepared into a shell emulsion, branched monomer, CNT , the weight ratio of methyl methacrylate and calcium dodecylbenzenesulfo...

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Abstract

The invention relates to a CNT composite branched core-shell structure acrylate and a weather-resistant, anti-static and low-temperature resistant polycarbonate material, which belongs to the technical field of polymer materials. The CNT composite branched core-shell structure acrylate of the present invention includes an acrylate core, a polymethyl methacrylate shell covering the acrylate core, and a branched monomer grafted on the polymethyl methacrylate shell , and carbon nanotubes connected with branched monomers, the CNT composite branched core-shell structure acrylate of the present invention can be used for polycarbonate, can effectively toughen polycarbonate, improve its low temperature resistance, and effectively improve polycarbonate Antistatic properties of esters.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a CNT composite branched core-shell structure acrylate and a weather-resistant, antistatic and low-temperature resistant polycarbonate material. Background technique [0002] Polycarbonate (PC) is a non-crystalline resin, which is a transparent glass in the melt and solidified state, with excellent optical properties and surface gloss. The molecular structure of polycarbonate is composed of main chain benzene ring structure and ester group structure. It is a material with both rigidity and toughness. The flexural modulus can reach more than 2400MPa, and the IZOD notch impact at room temperature is 60-90KJ / cm 2 ; Moreover, polycarbonate has excellent thermal properties and flame retardancy. The heat distortion temperature of pure polycarbonate plastic is about 130°C, the ball pressure is 125°C, and the glow wire GWFI can reach 850°C; its comprehensive performance is the be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08L51/00C08K3/04C08F265/06C08F220/14
CPCC08L69/00C08F265/06C08L2201/08C08L2201/04C08L2207/20C08L2205/03C08L2205/025C08L2205/035C08L2207/53C08K2201/011C08K2201/003C08K2201/004C08K2201/001C08L51/003C08K3/041C08F220/14
Inventor 吴剑波麻一明徐禄波王旭孙剑范方虹蒋祥鸳
Owner 宁波坚锋新材料有限公司