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Method for preparing urea-formaldehyde foam powder for plant culture medium by one-step method

A technology of urea-formaldehyde foam and culture medium, which is applied in the field of preparation of plant culture medium materials, can solve problems such as complex process, long route, and uneconomical economical perspective, and achieve the effect of simple process, low cost, and improved water absorption and water retention performance

Inactive Publication Date: 2017-12-01
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In summary, it can be seen that in the existing process of preparing urea-formaldehyde foam powder as a plant medium, the route is long and the process is complicated, and it is not cost-effective from an economic point of view. Therefore, the inherent characteristics of the reaction between urea and formaldehyde are used to achieve It is possible to prepare urea-formaldehyde foam powder for plant culture medium in one step

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] First, 1000 grams of formaldehyde solution and 1250 grams of urea were added to the mixer for dissolution; 42 grams of dioctyl sodium sulfosuccinate was added to the above aqueous solution to dissolve and foam with high-speed stirring; finally, 27 grams The benzenesulfonic acid curing agent is added to the above solution and stirred evenly; the obtained urea-formaldehyde foam becomes wet granules under the shear force of a 500rpm agitator; the wet granules are dried at a temperature of 25°C for about 48 hours to obtain the water content About 5% urea-formaldehyde resin powder.

example 2

[0028] First, 1000 grams of formaldehyde solution and 1400 grams of urea were added to the mixer for dissolution; 55 grams of sodium dioctyl succinic acid sulfonate was added to the above aqueous solution to dissolve and foam with high-speed stirring; finally, 32 grams The benzenesulfonic acid curing agent is added to the above solution and stirred evenly; the obtained urea-formaldehyde foam becomes wet granules under the shear force of a 650rpm mixer; the wet granules are dried at a temperature of 25°C for about 32 hours to obtain the water content About 5% urea-formaldehyde resin powder.

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Abstract

A method for preparing a urea-formaldehyde foam powder for plant culture medium by a one-step method relates to a method for preparing a culture substrate material for plant cultivation. The urea-formaldehyde resin foam powder adopts urea, an aqueous formaldehyde solution or an aqueous solution of paraformaldehyde, and is prepared into a mixed solution in proportion , Add foaming agent and curing agent to mix evenly, keep stirring during the foaming process, and dry to obtain urea-formaldehyde foam powder for plant culture medium after the urea-formaldehyde resin forms dispersed wet urea-formaldehyde foam particles. The prepared powder is non-polluting, non-toxic and degradable, and can be directly mixed with soil. The product can provide abundant nitrogen sources for plants; due to the large specific surface area of ​​the foam, it has strong water absorption and water retention properties, which is beneficial to all kinds of plants. The addition of nutrients is required, and it is very suitable for use as a culture substrate material for plant cultivation in the agricultural field. Therefore, the one-step preparation of urea-formaldehyde resin foam with urea-formaldehyde as raw material will surely have wide application in the field of plant cultivation.

Description

technical field [0001] The invention relates to a preparation method of a plant culture medium material, in particular to a method for preparing urea-formaldehyde foam powder used in a plant culture medium by a one-step method. Background technique [0002] Foam plastic is a kind of polymer material formed by a large number of gas micropores dispersed in solid plastic. Compared with pure plastic, foam plastic has low density, light weight and high specific strength. Its strength increases with the increase of density. It has the ability to absorb impact load, has excellent cushioning and shock absorption performance, sound insulation and sound absorption performance, low thermal conductivity, good heat insulation performance, excellent electrical insulation performance, and has corrosion resistance and mold resistance. Urea-formaldehyde foam is a kind of foam plastic, which is a kind of porous rigid foam plastic. It is mainly used as thermal insulation material and also as a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/12C08J9/04C08L61/24C08G12/12A01G31/00
Inventor 张文政黄丽牟江南王丹焱
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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