Preparation method of phosphate timber fire retardant and method for processing timber by using fire retardant

A flame retardant and phosphate technology, which is applied in the field of phosphate wood flame retardant preparation, can solve the problems of low cost, low toxicity and high cost of flame retardant, and achieves good flame retardant effect, good expansion performance and short immersion time. Effect

Active Publication Date: 2011-03-02
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic flame retardants have low toxicity and low cost but are easy to precipitate, which affects the final flame retardant effect of wood
In recent years, with the improvement of laws and regulations and the enhancement of people's awareness of environmental protection, intumescent organic flame retardants have entered the stage of history, but ordinary wood products are not high-end consumer goods, and the high cost of flame retardants limits their wide application.
In addition, there are disadvantages of destroying wood characteristics such as toughness and strength.

Method used

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  • Preparation method of phosphate timber fire retardant and method for processing timber by using fire retardant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add polyphosphoric acid, pentaerythritol, 150ml of solvent methylene chloride, 15g of potassium carbonate in a 500ml three-neck flask equipped with a condensing reflux device according to a molar ratio of 2:1, nitrogen protection, uniform stirring, and heat up to 30°C for 45min, then heat up to React at 50°C for 4 hours, cool, filter with suction, wash with dichloromethane, and dry to obtain cage-shaped phosphate ester powder.

[0023] In water, according to the molar ratio of 2:1, react the caged phosphate ester with melamine phosphate, react at a constant temperature of 60°C for 1 hour, cool, filter, crystallize with glacial acetic acid, and dry to obtain cyclic phosphate powder.

Embodiment 2

[0025] Add polyphosphoric acid, pentaerythritol, solvent dichloromethane 200ml, potassium carbonate 20g according to the molar ratio 3: 1 in the 500ml three-neck flask equipped with condensing reflux device, nitrogen protection, stir evenly, heat up to 50 ℃ and react for 45min, then heat up to React at 85°C for 4 hours, cool, filter with suction, wash with dichloromethane, and dry to obtain cage-shaped phosphate ester powder.

[0026] In water, according to the molar ratio of 2:1, react the caged phosphate ester with melamine phosphate, react at a constant temperature of 70°C for 1 hour, cool, filter, crystallize with glacial acetic acid, and dry to obtain cyclic phosphate powder.

Embodiment 3

[0028] In a 500ml three-necked flask equipped with a condensation reflux device, add polyphosphoric acid, pentaerythritol, solvent methylene chloride 200ml, potassium carbonate 20g according to the molar ratio of 3:1, nitrogen protection, uniform stirring, heat up to 50 ° C for 1 hour, and then heat up to React at 120°C for 4 hours, cool, filter with suction, wash with dichloromethane, and dry to obtain cage-shaped phosphate ester powder.

[0029] In water, according to the molar ratio of 2:1, react the caged phosphate ester with melamine phosphate, react at a constant temperature of 85°C for 1 hour, cool, filter, crystallize with glacial acetic acid, and dry to obtain cyclic phosphate powder.

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Abstract

The invention provides a preparation method of phosphate timber fire retardant and a method for processing timber by using the fire retardant. The fire retardant prepared by the invention is expansible annular phosphate timber fire retardant which contains an acid source, a carbon source and a gas resource, has the advantages of good expansiveness, compact carbon layer and certain intensity, and has good antiflaming effect proved by the measurement of an oxygen index and smoke density and the analysis of a dual cone calorimeter. The fire retardant is insoluble in water but soluble in organic solvent. The method for processing timber by fire retardant has the advantages of complete dipping, large dipping depth and lasting antiflaming effect, the dipping time is shorter than common dipping time, and time is saved.

Description

technical field [0001] The invention relates to a method for preparing a phosphate wood flame retardant and a method for treating wood with the flame retardant. Background technique [0002] With the rapid development of the economy, people's demand for various building materials is increasing. Wood material, as one of the four major building materials (steel, cement, wood, plastic), is the only renewable green and environmentally friendly material. And because of the excellent natural characteristics of wood, it is deeply favored by people. However, wood products are flammable and are the source and propagation medium of many fires. It not only brings potential danger to people's daily life, but also limits the application of wood in many fields. Therefore, flame-retardant treatment of flammable wood in order to improve and improve some of its material properties, so that it can be fully, rationally and efficiently utilized, is in line with the requirements of economic d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/52B27K3/08B27K3/04
Inventor 陈志林付晓丁
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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