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Wood fiber reinforced inflaming retarding foam material and machining method thereof

A wood fiber and flame retardant foam technology, applied in the field of wood fiber reinforced flame retardant foam materials, can solve the problems of less research on foaming technology, high price of melamine formaldehyde foam, etc., and achieves simple and effective preparation method, good flame retardancy and low cost. Effects of Toxic Release

Inactive Publication Date: 2012-07-25
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Melamine formaldehyde foam is expensive, and its application range is limited to military, marine and aerospace thermal insulation
At present, there are still few researches on the foaming technology of wood fiber reinforced flame-retardant foamed plastics.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] First, add 0.25% of γ-aminopropyltriethoxysilane coupling agent to poplar fiber, stir evenly, and dry at 60°C. Then take 80 parts of phenolic resin, then add 5 parts of sodium dodecylbenzenesulfonate surfactant, 0.5 parts of curing agent hydrochloric acid, 2.5 parts of curing agent phosphoric acid, 2 parts of toughening agent aluminum stearate, coupling agent 6 parts of treated poplar fiber, 4 parts of foaming agent cyclopentane. Put the mixture in a kneader at room temperature and knead evenly, then take it out and place it in a foaming mold (mould volume 400mL) at 70°C for foaming and solidification. The material density is 0.12g / cm 3 , the thermal conductivity is 0.048W / (m K), the critical oxygen index is 41%, the compressive strength is 0.42MPa, and the bending strength is 0.32MPa.

Embodiment 2

[0034]First, add γ-chloropropyl triethoxysilane accounting for 0.5% of the willow fiber mass into the willow fiber, stir evenly and then dry at 60°C. Then get 85 parts of phenolic resin, then add 2 parts of stearic acid, 2 parts of phosphoric acid, 0.5 part of octadecyl isocyanate, 7 parts of willow fiber after coupling agent treatment, and 3.5 parts of cyclopentane. Put the mixture in a kneader at room temperature and knead evenly, then take it out and place it in a foaming mold (mould volume 400mL) at 70°C for foaming and solidification. Material density is 0.19g / cm 3 , the thermal conductivity is 0.050W / (m·K), the critical oxygen index is 40.8%, the compressive strength is 0.46MPa, and the bending strength is 0.31MPa.

Embodiment 3

[0036] First, add 0.15% vinyltriethoxysilane coupling agent to the camphor wood fibers with a length of 1-10mm and a diameter of 0.05-0.5mm, stir evenly and dry at 60°C. Then get 70 parts of phenolic resin, then add successively 5 parts of alkyl dimethyl benzyl quaternary ammonium salt alkyl dimethyl benzyl quaternary ammonium salt surfactant, 0.5 part of sulfuric acid curing agent, p-toluenesulfonic acid curing 4.5 parts of agent, 5 parts of polyvinyl alcohol toughening agent, 10 parts of camphor wood fiber after coupling agent treatment, 5 parts of cyclopentane blowing agent. Put the mixture in a kneader at room temperature and knead evenly, then take it out and place it in a foaming mold (mould volume 400mL) at 70°C for foaming and solidification. The material density is 0.08g / cm 3 , the thermal conductivity is 0.038W / (m·K), the critical oxygen index is 38%, the compressive strength is 0.21MPa, and the bending strength is 0.19MPa.

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Abstract

The invention discloses a wood fiber reinforced inflaming retarding foam material and a machining method thereof. The composite foam material is prepared from the following components in parts by weight: 40-95 parts of foaming flame-retarded resin, 0.1-8 parts of curing agent, 0.5-8 parts of surfactant, 1-50 parts of wood fiber and 0.5-10 parts of flexibilizer. The wood fiber is treated by using a coupling agent and then dried, and the coupling agent accounts for 0.15-0.5 percent of the mass of the wood fiber. A naturally expanded foaming method or die foaming method is adopted. The wood fiber reinforced inflaming retarding foam material can be widely applied to fields of insulation of building outer wall bodies, architectural ornament, traffic vehicles, water ships, aerospace, electromechanical equipment, industrial sound absorption, heat preservation and shock absorption and the like, and is a composite foaming material with actual application value.

Description

technical field [0001] The invention belongs to the technical field of bio-based flame-retardant composite foam materials, and in particular relates to a wood fiber-reinforced flame-retardant foam material. Background technique [0002] Foam is a new type of composite material filled with gas. There are many kinds of foam materials, but they all have some common characteristics and valuable properties, such as light weight, low thermal conductivity, heat insulation, sound insulation, ability to absorb impact loads and thus have excellent cushioning properties, and high specific strength. Foam material is a widely used polymer material, which is widely used in industrial and agricultural production and national defense construction. Due to its special chemical structure, plastic foam determines that most products are flammable products. A large amount of toxic gas and smoke generated during combustion have extremely bad effects on human health and the environment. Foam mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/06C08L61/32C08L97/02C08J9/14
CPCY02P20/582
Inventor 储富祥王春鹏李守海张伟马玉峰许玉芝金立维赵临五
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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