Wood flour/polypropylene wood-plastic composite material using silane modified ammonium polyphosphate as fire retardant and preparation method thereof

A wood-plastic composite material, ammonium polyphosphate technology, applied in the field of wood powder/polypropylene wood-plastic composite material and its preparation, can solve the problems of poor flame retardant performance, poor heat resistance, low mechanical properties, etc. performance, improved compatibility, improved thermal degradation behavior

Inactive Publication Date: 2011-06-15
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of poor compatibility, low mechanical properties, poor flame retardancy and poor heat resistance of existing wood powder/polypropylene wood-plastic composite materials that use ammonium polyphosphate as a flame retardant. Pr...

Method used

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  • Wood flour/polypropylene wood-plastic composite material using silane modified ammonium polyphosphate as fire retardant and preparation method thereof
  • Wood flour/polypropylene wood-plastic composite material using silane modified ammonium polyphosphate as fire retardant and preparation method thereof
  • Wood flour/polypropylene wood-plastic composite material using silane modified ammonium polyphosphate as fire retardant and preparation method thereof

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specific Embodiment approach 1

[0025] Specific embodiment one: this embodiment is the wood powder / polypropylene wood-plastic composite material that uses silane-modified ammonium polyphosphate as a flame retardant, which consists of 50-70 parts of wood powder, 30-50 parts of polypropylene, 15-30 parts of silane-modified ammonium polyphosphate (M-APP), 3-6 parts of m-isopropenyl-α, α-dimethylbenzyl isocyanate grafted polypropylene (m-TMI-g-PP) The silane-modified ammonium polyphosphate is made of 80-100 parts of ammonium polyphosphate and 0.5-2 parts of γ-methacryloxypropyl trimethoxy made from silane.

[0026] The wood powder / polypropylene wood-plastic composite material of this embodiment using silane-modified ammonium polyphosphate as a flame retardant has good mechanical properties, with a tensile strength of 24.93-28.04MPa, a bending strength of 61.98-65.68MPa, and an impact strength of 4.11~5.75kJ / m 2 ; Good heat resistance, the temperature at which the weight loss is 1% (T 1wt％ ) is 102.3~108.3℃, t...

specific Embodiment approach 2

[0028] Specific embodiment two: the difference between this embodiment and specific embodiment one is by weight by 60 parts of wood flour, 40 parts of polypropylene, 20 parts of silane modified ammonium polyphosphate, 6 parts of m-isopropenyl-α, α - Made of dimethyl benzyl isocyanate grafted polypropylene coupling agent and 1 part antioxidant. Other parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0029] Specific embodiment three: the difference between this embodiment and specific embodiment one is that by weight, 60 parts of wood flour, 40 parts of polypropylene, 25 parts of silane modified ammonium polyphosphate, 6 parts of m-isopropenyl-α, α - Made of dimethyl benzyl isocyanate grafted polypropylene coupling agent and 1 part antioxidant. Other parameters are the same as in the first embodiment.

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Abstract

The invention relates to a wood flour/polypropylene wood-plastic composite material and a preparation method thereof, in particular to a wood flour/polypropylene wood-plastic composite material using silane modified ammonium polyphosphate as a fire retardant and a preparation method thereof. The invention solves the problems of poor compatibility, low mechanical properties, poor fire retardance and poor heat resistance of the existing wood flour/polypropylene wood-plastic composite material using ammonium polyphosphate as a fire retardant. The wood-plastic composite material is prepared from wood flour, polypropylene, silane modified ammonium polyphosphate, m-TMI-g-PP coupling agent and antioxidant, wherein the silane modified ammonium polyphosphate is prepared from ammonium polyphosphate and gamma-methacryloxypropyltrimethoxysilane. The preparation method comprises the following steps: preparing the silane modified ammonium polyphosphate; then, mixing the wood flour, polypropylene, silane modified ammonium polyphosphate, m-TMI-g-PP coupling agent and antioxidant; and finally, extruding by using a double screw extruder. The wood-plastic composite material provided by the invention has fine fire retardance, high mechanical properties and good heat resistance; and the process is simple.

Description

technical field [0001] The invention relates to a wood powder / polypropylene wood-plastic composite material and a preparation method thereof, in particular to a wood powder / polypropylene wood-plastic composite material using silane-modified ammonium polyphosphate as a flame retardant and a preparation method thereof. Background technique [0002] Wood-plastic composite material is an environmentally friendly new material formed by using different component forms of agricultural and forestry waste wood raw materials and plastic or recycled plastic through recombination and compounding. Since the 1990s, wood-plastic composite materials have developed very rapidly, and they are mainly used in outdoor decoration, corridor panels, stairs, guardrails and a small amount of civilian consumer goods. Wood-plastic composite materials can make full use of waste wood materials and waste plastic materials that are difficult to degrade, and provide a new solution to alleviate the current s...

Claims

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Application Information

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IPC IPC(8): C08L97/02C08L23/12C08K13/06C08K9/06C08K3/32B29C47/92B29C48/92
CPCB29C48/40
Inventor 李丽萍周林郭垂根
Owner NORTHEAST FORESTRY UNIVERSITY
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