Cage-shaped oligomeric silsesquioxane flame-retardant polycarbonate as well as preparation method and application thereof

A technology of flame retardant polycarbonate and sesquioxane, which is applied in the field of flame retardant, can solve problems such as not being able to meet actual needs, and achieve the effect of simple preparation method and strong operability

Inactive Publication Date: 2019-01-18
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the improvement of environmental protection requirements, traditional halogenated flame retardants can no longer meet the actual needs

Method used

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  • Cage-shaped oligomeric silsesquioxane flame-retardant polycarbonate as well as preparation method and application thereof
  • Cage-shaped oligomeric silsesquioxane flame-retardant polycarbonate as well as preparation method and application thereof
  • Cage-shaped oligomeric silsesquioxane flame-retardant polycarbonate as well as preparation method and application thereof

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preparation example Construction

[0081] The present invention also provides the preparation method of cage oligomeric silsesquioxane flame-retardant polycarbonate described in the above technical scheme, comprising the following steps:

[0082] The polycarbonate, flame retardant, anti-dropping agent and antioxidant are mixed according to the weight fraction, and then melted, kneaded, extruded, cooled, pelletized and dried to obtain a cage-shaped oligomeric silsesquioxane Burning polycarbonate.

[0083] In the present invention, the melting, kneading and extrusion are preferably carried out in a twin-screw extruder.

[0084] In the present invention, the temperature of each section of the twin-screw extruder is preferably 230-265°C; the drying temperature is preferably 100-120°C.

[0085] The present invention also provides the application of the clathrate oligomeric silsesquioxane flame-retardant polycarbonate described in the technical solution above in the flame-retardant field.

[0086] In the present in...

Embodiment 1

[0089] Preparation of flame retardant

[0090] Under an air atmosphere, mix 28.42 g of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide triethoxysilane, 2.38 g of vinyltriethoxysilane and 250 mL of methanol And fully stirred, 3mL of concentrated hydrochloric acid (mass fraction: 36.5%) was added dropwise, after the system was uniformly mixed, the temperature was raised to 70°C, 4mL of deionized water was added dropwise, and reacted for 24h. After the reaction, the product was slowly dropped into deionized water to precipitate according to the volume ratio of 1:11, filtered, washed and dried to obtain a white powder, which was dissolved in a sufficient amount of chloroform, and then mixed according to the volume ratio of 1 : 5 the mixed system is added in normal hexane, filter after sufficient precipitation, wash, dry, obtain the clathrate oligomeric silsesquioxane with phosphorus and double bond groups simultaneously, record as phosphorus clathrate oligomeric silicon Sesqui...

Embodiment 2

[0097] Flame retardant preparation

[0098] Under an air atmosphere, mix 28.42 g of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide triethoxysilane, 13.3 g of vinyltriethoxysilane and 300 mL of methanol And fully stirred, 3mL of concentrated hydrochloric acid (mass fraction: 36.5%) was added dropwise, after the system was uniformly mixed, the temperature was raised to 65°C, 6mL of deionized water was added dropwise, and reacted for 20h. After the reaction, the product was slowly dropped into deionized water for precipitation according to the volume ratio of 1:10, filtered, washed and dried to obtain a white powder, which was dissolved in a sufficient amount of chloroform, and then mixed according to the volume ratio of 1 : 6 the mixed system is added in normal hexane, filter after sufficient precipitation, wash, dry, obtain the clathrate oligomeric silsesquioxane with phosphorus and double bond groups simultaneously, record as phosphorus clathrate oligomeric silicon Sesqui...

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Abstract

The invention provides cage-shaped oligomeric silsesquioxane flame-retardant polycarbonate and belongs to the field of flame retardance. According to the cage-shaped oligomeric silsesquioxane flame-retardant polycarbonate disclosed by the invention, the flame retardant is cage-shaped oligomeric silsesquioxane having phosphorus-containing groups and double bond groups, the ratio of the phosphorus-containing groups to the double bond groups in the flame retardant can be regulated according to different actual requirements, the types of the phosphorus-containing groups and the types of the doublebond groups can also be regulated, and the aim of controlling the phosphorus content and the amount of reactive groups is achieved. The double bond groups contained in the flame retardant can carry out a chemical reaction with multiple groups, the reactions of the double bond groups and corresponding groups can be regulated according to performance requirements of different polymers, and finallymulti-functionalization and high performance in the polymer material are realized; meanwhile, by utilizing the silicon phosphate synergistic effect of polysiloxane, high flame-retardant property underlow content can be realized; and moreover, the flame retardant provided by the invention is excellent in heat stability and high in residual carbon content, the flame retardant property of a PC composite material can be improved under the condition that the addition amount is very small, and the mechanical strength is excellent.

Description

technical field [0001] The invention belongs to the technical field of flame retardancy, and in particular relates to a cage-shaped oligomeric silsesquioxane flame-retardant polycarbonate and a preparation method and application thereof. Background technique [0002] Polycarbonate (PC) is one of the engineering plastics with a wide range of applications. It is mainly used in glass assembly industry, automobile industry, electronics and electrical appliances industry, followed by industrial machinery parts, CDs, packaging, computers and other office equipment, medical and For health care, film, leisure and protective equipment, etc., it has good transparency, high impact strength, fatigue resistance, etc., good dimensional stability, and low molding shrinkage. Its own flame retardant level can reach UL-94V-2 level. However, its processing fluidity is poor, it is prone to stress cracking, and it is accompanied by molten droplets when burning, which will ignite the material be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L27/18C08L25/12C08L83/08C08G77/30C08G77/20
CPCC08L69/00C08G77/045C08L2201/02C08L2205/03C08L27/18C08L25/12C08L83/08C08L27/12
Inventor 张文超王小霞杨荣杰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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