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Method for producing composite material of flame-retardant rigid polyurethane foam material by using plant fibers

A technology of rigid polyurethane and plant fiber, which is applied in the field of preparation of rigid polyurethane foam composite materials, can solve the problem of high amount of inorganic fillers, and achieve the effects of fewer processes, flame resistance, no pollution to the environment, and easy operation

Inactive Publication Date: 2018-06-01
ZHEJIANG FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermal stability of the polyurethane foam prepared by this method is improved, but due to the high amount of inorganic filler, the density of the polyurethane foam is as high as 0.8g / cm 3

Method used

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  • Method for producing composite material of flame-retardant rigid polyurethane foam material by using plant fibers
  • Method for producing composite material of flame-retardant rigid polyurethane foam material by using plant fibers
  • Method for producing composite material of flame-retardant rigid polyurethane foam material by using plant fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 (corresponding raw material and proportioning value thereof of implementing 1 in the comparison table 1):

[0030] 1 weight part of poplar wood powder crushed into 400 meshes, 39 weight parts of polyol, stirred at normal pressure and room temperature for 4 hours, the rotating speed is 2000r / min, so that the wood fibers are evenly and fully dispersed in polyol, and catalyst dilauric acid di 0.02 parts by weight of butyl tin, 0.1 parts by weight of water as a foaming agent, and 3 parts by weight of Dow Corning silicone oil OFX-093 as a foam stabilizer, according to the ratio of ammonium polyphosphate: melamine: dimethyl methyl phosphate = 20:20:5 parts by weight 45 parts by weight of the composite flame retardant, 1 part by weight of montmorillonite and 6 parts by weight of magnesium oxide, stirred at room temperature for 0.5h, and the rotating speed was 2000r / min, after stirring evenly, add 100 parts by weight of polymethylene polyphenylisocyanate MDI -200, ...

Embodiment 2

[0031] Embodiment 2 (corresponding raw material and proportioning value thereof of implementing 2 in the comparison table 1):

[0032] 6 parts by weight of bamboo powder crushed into 400 meshes, 34 parts by weight of polyol, stirred at normal pressure and room temperature for 4 hours, the rotating speed is 2000r / min, so that the wood fibers are evenly and fully dispersed in polyethylene glycol with a molecular weight of 400, adding The catalyst dibutyltin dilaurate is 0.04 parts by weight, the foaming agent is 0.2 parts by weight of water, and the foam stabilizer Dow Corning Silicone Oil OFX-093 is added in 4 parts by weight, according to ammonium polyphosphate: melamine: dimethyl methyl phosphate = 30:15: 52 parts of composite flame retardants with a ratio of 7 parts by weight, 2 parts by weight of montmorillonite and 5 parts by weight of magnesium oxide, stirred at room temperature for 0.5h, and the rotating speed was 2000r / min, after stirring evenly, add 100 parts by weight ...

Embodiment 3

[0033] Embodiment 3 (corresponding raw material and proportioning value thereof of implementing 8 in the comparison table 1):

[0034] 10 parts by weight of corn stalk powder crushed into 400 meshes, 30 parts by weight of polyol, stirred at normal pressure and room temperature for 4 hours, with a rotating speed of 2000r / min, so that the wood fibers were uniformly and fully dispersed in polyethylene glycol with a molecular weight of 400, Add 0.06 parts by weight of dibutyltin dilaurate as a catalyst, 0.4 parts by weight of water as a foaming agent, and 6 parts by weight of Dow Corning silicone oil OFX-093 as a foam stabilizer, according to ammonium polyphosphate: melamine: dimethyl phosphate = 40:10 : 70 parts by weight of a composite flame retardant with a ratio of 20 parts by weight, 9 parts by weight of an inorganic filler, stirred at room temperature for 0.5h, and a rotating speed of 2000r / min, and added 100 parts by weight of polymethylene polyphenylisocyanate MDI- 400, when...

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Abstract

The invention relates to a method for producing a composite material of a flame-retardant rigid polyurethane foam material by using wood fibers as a raw material. The method comprises the following five steps: firstly, selecting a plant fiber raw material; secondly, pre-treating the raw material; thirdly, preparing plant fiber polyalcohols; fourthly, preparing a composite flame retardant; and fifthly, preparing the composite material. The flame-retardant rigid polyurethane foam material prepared from the composition has an oxygen index of more than 34, and achieves the standard of the A-gradeincombustible material specified in the ''Classification for burning behavior of building materials and products'' of GB8624-2012. Part of polyhydric alcohol is substituted with plant fiber powder, and a polyhydric alcohol composite material is structurally modified, so that the production cost is low, the composite material provided by the invention is environmentally friendly, the flame-retardant effect is better, and the method provided by the invention is a novel approach for high-value utilization of plant fiber raw materials.

Description

technical field [0001] The invention belongs to the preparation technology of rigid polyurethane foam composite materials, and in particular relates to a method for producing fully water-foamed, halogen-free and flame-retardant rigid polyurethane foam composite materials by using wood fibers as raw materials. Background technique [0002] Rigid polyurethane foam materials are widely used in construction, transportation, cold storage, refrigerators, freezers, petrochemical pipelines, aviation, etc. field. In recent years, with the in-depth development of energy-saving materials in the construction industry in my country, various excellent properties of rigid polyurethane foam have been favored by people in the construction industry, and rigid polyurethane foam materials are gradually used in building roofs, walls and other parts. However, the biggest defect of polyurethane is its flammability, and it produces a lot of smoke and even releases toxic gas when it is burned, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/64C08G18/48C08K3/22C08K3/32C08K3/34C08K5/3492C08K5/521C08J9/08C08G101/00
CPCC08G18/4833C08G18/6492C08G18/7664C08K3/22C08K3/32C08K3/346C08K5/34922C08K5/521C08K2003/222C08K2003/323C08G2110/0083
Inventor 金贞福邵金力
Owner ZHEJIANG FORESTRY UNIVERSITY