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Organic silicon-boron flame-retardant wood-plastic composite material and preparation method thereof

A wood-plastic composite material and organosilicon technology, which is applied in the field of organosilicon-boron flame-retardant wood-plastic composite materials and their preparation, to achieve the effects of good mechanical properties, excellent flame-retardant properties, and excellent mechanical properties

Inactive Publication Date: 2012-01-25
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These technologies provide a better method for flame retardant treatment of wood-plastic composites. However, in order to achieve ideal flame-retardant effects and maintain good mechanical properties of wood-plastic composites, most of the existing technologies require addition of flame retardants. Adding compatibilizers or compatibilizing plastics and wood flour
[0005] In the prior art, there is no relevant report on the use of borosiloxane as a flame retardant in wood-plastic composite materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Add 150g of water and a small amount of acetic acid into a 500ml three-necked flask, pour a mixture of 0.3mol of vinyltriethoxysilane, 0.18mol of diphenyldimethoxysilane and 0.12mol of dimethyldimethoxysilane Put it into a constant pressure dropping funnel, add it dropwise to the above flask, adjust the pH value to 3.5, and react at 80°C for 60 minutes to obtain the intermediate product silanol. Then dissolve the synthesized silanol in 100g of xylene, then react the xylene solution of silanol with 28g of boric acid at 100°C for 4 hours, and distill off the solvent xylene under reduced pressure to finally obtain polyborosiloxane flame-retardant agent.

Embodiment 2

[0049] Add 170g of water and a small amount of hydrochloric acid into a 500ml three-necked flask, pour a mixture of 0.24mol of vinyltriethoxysilane, 0.18mol of diphenyldimethoxysilane and 0.18mol of methyltrimethoxysilane into a constant Put it into the above-mentioned flask dropwise in a pressure dropping funnel, adjust the pH value to 2.8, and react at 70° C. for 25 minutes to obtain the intermediate product silanol. Then dissolve the synthesized silanol in 110g of toluene, and then continue to react the toluene solution of silanol with 20g of boric acid at 90°C for 1 hour and 40 minutes, and distill off the solvent toluene under reduced pressure to finally obtain a polyborosiloxane flame retardant .

Embodiment 3

[0051] 8 parts of polyborosiloxane flame retardants (parts by weight, the same below), 92 parts of low-density polyethylene (LDPE 2426H) and 0.3 parts of dicumyl peroxide prepared by Example 2 are mixed uniformly, and then added Melt and knead at 185° C. for 8 minutes in a torque rheometer at 120 rpm to prepare a borosiloxane grafted polymer.

[0052] With the above-mentioned borosiloxane graft polymer of 40 parts by weight, 10 parts by weight of low-density polyethylene (LDPE 2426H), 50 parts by weight of wood flour, 0.3 parts by weight of cobalt naphthenate and 0.3 parts by weight of antioxidant 1010 (ie Tetrakis (β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate) pentaerythritol ester) mixed evenly, then added to a twin-screw extruder, and extruded at 180°C to obtain resistance Burning wood-plastic composite material ZRWPC-1.

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PUM

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Abstract

The invention discloses an organic silicon-boron flame-retardant wood-plastic composite material, which is prepared from the following raw materials in part by weight: 30 to 70 parts of plastic substrate which contains a boron siloxane graft polymer, 30 to 70 parts of plant fiber powder, 0.05 to 1.0 part of catalyst and 0.1 to 1.0 part of antioxidant. The plastic substrate which contains the boron siloxane graft polymer is prepared from the following raw materials in part by weight: 20 to 100 percent of boron siloxane graft polymer and the balance of thermoplastic plastic. The flame-retardantwood-plastic composite material has the advantages of high mechanical performance, no corrosion and no harm to the environment and human body.

Description

technical field [0001] The invention relates to the field of flame-retardant wood-plastic composite materials and the preparation thereof, in particular to an organosilicon-boron flame-retardant wood-plastic composite material and a preparation method thereof. Background technique [0002] Wood-plastic composite (WPC) is a kind of green environmental protection material that has emerged in recent years. This composite material is composed of agricultural and forestry waste (such as wood powder, bamboo powder, bran powder and other plant fibers) and plastic in a certain proportion. It is obtained by adding corresponding additives under high temperature and high pressure, and its products are mainly used as wood substitutes. Compared with traditional wood, wood-plastic composite materials have the advantages of no warping, no cracking, good dimensional stability, easy processing, mildew resistance, no fear of insects, acid and alkali resistance, and low cost. In recent years, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/10C08L97/02
Inventor 周文君吕群陈科宋健陈友财费阳
Owner HANGZHOU NORMAL UNIVERSITY
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