Silicious fire retard ant for polyolefin and its prepn and application

A technology of silicon flame retardants and polyolefins, which is applied in the field of silicon-containing flame retardants for polyolefins and its preparation, can solve the problems of damage to the mechanical properties of polyolefin materials, unsatisfactory flame retardant effects, unfavorable production and application, etc. Achieve improved compatibility, excellent synergistic flame retardant effect, and reduce the effect of mechanical properties

Inactive Publication Date: 2007-06-06
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the existing silicone flame retardants are mainly suitable for PC, PC / ABS and other engineering plastics and high-value plastic alloys, and the production cost is relatively high; for the widely used silicone flame retardants for conventional polyolefin materials Flame retardant, its flame retardant effect is not satisfactory; and due to its incompatibility with polyolefin substrates, it will cause great damage to the mechanical properties of polyolefin materials, which is not conducive to actual production and application

Method used

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  • Silicious fire retard ant for polyolefin and its prepn and application
  • Silicious fire retard ant for polyolefin and its prepn and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] When equipped with mechanical stirring, water separator and condenser, N 2 In the 500mL dry four-necked flask of the catheter, feed dry nitrogen to remove the air in the flask, then add 4.4g glycerol monostearate, 23.0g tributyl borate, 44.0g diphenyl dihydroxysilane, 3.6g Vinyltrimethoxysilane, 1.2g of dibutyltin dilaurate and 250mL of anhydrous toluene were stirred evenly, then gradually heated up to 110°C and refluxed for 4 hours, then heated up to 180°C to continue the reaction for 1 hour, and a light yellow solid was obtained after cooling. After drying, it was pulverized and sieved to obtain a white (slightly light yellow) fine powder with a yield of 88%. The molecular composition formula is: where R 1 is phenyl, R 3 for vinyl, R 4 Part of it is glyceryl monostearate, part of it is methoxy group, the molar content of phenyl group is about 91%; the weight average molecular weight is about 2.2×10 3 ; The melting temperature is 220°C.

Embodiment 2

[0026] When equipped with mechanical stirring, water separator and condenser, N 2 In the 500mL dry four-necked flask of the catheter, pass dry nitrogen into it to remove the air in the flask, then add 4.4g glycerol monooleate, 6.2g boric acid, 44.0g diphenyldihydroxysilane, 3.6g vinyltrimethoxy base silane, 1.2g dibutyltin dilaurate and 250mL anhydrous toluene, after stirring evenly, gradually raise the temperature to 160°C and reflux for 8 hours, then raise the temperature to 250°C and continue the reaction for 1 hour. White (slightly light yellow) fine powder was obtained by sieving with a yield of 96%. The molecular composition formula is: where R 1 is phenyl, R 3 for vinyl, R 4 Part of it is monoolein glyceride group, part of it is methoxy group, the molar content of phenyl group is about 90%; the weight average molecular weight is about 9.5×10 3 ; The melting temperature is 260°C.

Embodiment 3

[0028] When equipped with mechanical stirring, water separator and condenser, N 2 Into a 500mL dry four-neck flask in the catheter, pass dry nitrogen into it to remove the air in the flask, then add 9.0g glycerol monooleate, 6.2g boric acid, 66.0g diphenyldihydroxysilane, 3.6g vinyltrimethoxy silane, 1.7g of dibutyltin dilaurate and 250mL of anhydrous toluene were stirred evenly, then gradually heated up to 120°C and refluxed for 6 hours, and then heated up to 200°C to continue the reaction for 2 hours. After cooling, a light yellow solid was obtained, which was dried in vacuum and crushed. White (slightly light yellow) fine powder was obtained by sieving with a yield of 92%. The molecular composition formula is: where R 1 is phenyl, R 3 for vinyl, R 4 It is a glyceryl monooleate group, the phenyl molar content is about 92%; the weight average molecular weight is about 1.1×10 4 ; The melting temperature is 240°C.

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Abstract

The present invention provides one kind of silicious fire retardant for polyolefin with the molecular structure as shown. The fire retardant is white or yellowish powder and has smelting temperature of 220-260 deg.c. The present invention provides the preparation process of the silicious fire retardant and the application of the silicious fire retardant as halogen-free environment fire retarding additive for polyolefin material.

Description

technical field [0001] The invention belongs to the technical field of halogen-free environment-friendly flame retardants for polyolefins, and specifically relates to a silicon-containing flame retardant for polyolefins and a preparation method thereof, and the flame retardant as a halogen-free flame retardant additive for polyolefin materials and Use of the halogen-free flame retardant synergist. Background technique [0002] Polyolefin materials are widely used in various fields due to their excellent electrical insulation and chemical corrosion resistance, low price, and easy molding and processing. However, polyolefin materials are flammable and are accompanied by droplet phenomenon when burning, so it is necessary to modify polyolefin materials for flame retardancy. At present, it is mainly achieved by adding flame retardants and some flame retardant materials, that is, adding flame retardants and other additives together when compounding plastics. This method is easy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/00C08L83/14C08G77/50C08G77/08
Inventor 赵建青何继辉刘述梅叶华
Owner SOUTH CHINA UNIV OF TECH
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