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Modified sodium silicate binder

A glass binder and modified water technology, applied in the direction of adhesives, inorganic adhesives, polymer adhesive additives, etc., can solve the problems of collapse of the bonding interface, low bonding strength, poor water resistance, etc. The effect of thick adhesion, enhanced adhesion, and excellent surface properties

Inactive Publication Date: 2017-12-01
王敏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem mainly solved by the present invention is: it is difficult for traditional water glass adhesive to blend well with wood with organic interface. As a special wood adhesive, it shows low bonding strength, poor water resistance and bonding interface after curing. The problem of easy collapse under the action of external force provides a modified water glass binder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] Wash the fungus with deionized water for 5 times, dry in a vacuum freeze-drying box for 30 minutes to obtain dried fungi, and then place the dried fungi in a freeze grinder for 25 minutes to freeze and pulverize to obtain bacterial cell powder. Add the bacterial cell powder and water Place the beaker in a beaker, and move the beaker into a digital speed measuring constant temperature magnetic stirrer. Under the conditions of temperature 40°C and rotation speed 500r / min, stir and mix at a constant temperature for 20 minutes to obtain a mixed solution, and then filter the mixed solution to obtain a filtrate, and place the filtrate in a In a pear-shaped flask, fix the pear-shaped flask on a rotary evaporator, adjust the pressure of the rotary evaporator to 800Pa, the temperature to 38°C, concentrate under reduced pressure for 40 minutes to obtain a concentrated solution, and vacuum freeze-dry the concentrated solution for 2 hours to obtain the fungal extract. Then, in parts...

example 2

[0023] In terms of parts by weight, take 100 parts of water, 10 parts of agar, 40 parts of silicon acrylic emulsion and 180 parts of water glass in sequence, first add agar and water into the beaker, and heat it at a temperature of 98 °C and a speed of 500 r / min Stir and dissolve for 10 minutes to obtain agar liquid, then place the agar liquid in an ice-water bath at 4°C, and stir and cool at a speed of 600r / min for 30 minutes to obtain a cooled agar liquid; Add silicon acrylic emulsion and water glass into the mixer, and stir at a high speed for 50 minutes at a speed of 1600r / min, then transfer the material in the mixer to an ultrasonic disperser, and disperse it ultrasonically for 45 minutes at an ultrasonic frequency of 50kHz. After obtaining the dispersion, put the dispersion in a pear-shaped flask, fix the pear-shaped flask on a rotary evaporator, adjust the pressure of the rotary evaporator to 800Pa, the temperature to 40°C, and the rotation speed to be 500r / min. Concentr...

example 3

[0025] Wash the fungus with deionized water for 5 times, dry in a vacuum freeze-drying box for 30 minutes to obtain dried fungi, and then place the dried fungi in a freeze grinder for 25 minutes to freeze and pulverize to obtain bacterial cell powder. Add the bacterial cell powder and water Place the beaker in a beaker, and move the beaker into a digital speed measuring constant temperature magnetic stirrer. Under the conditions of temperature 40°C and rotation speed 500r / min, stir and mix at a constant temperature for 20 minutes to obtain a mixed solution, and then filter the mixed solution to obtain a filtrate, and place the filtrate in a In a pear-shaped flask, fix the pear-shaped flask on a rotary evaporator, adjust the pressure of the rotary evaporator to 800Pa, the temperature to 38°C, concentrate under reduced pressure for 40 minutes to obtain a concentrated solution, and vacuum freeze-dry the concentrated solution for 2 hours to obtain the fungal extract. matter; then in ...

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Abstract

The invention discloses a modified sodium silicate binder and belongs to the field of wood binders. The modified sodium silicate binder is prepared from raw materials in parts by weight as follows: 30-40 parts of a fungus extract, 8-10 parts of agar, 80-100 parts of water, 30-40 parts of a silicone-acrylate emulsion and 160-180 parts of sodium silicate. The agar is firstly placed in water to be heated and stirred to be dissolved and mixed with the silicone-acrylate emulsion and sodium silicate after being cooled, the mixture is stirred at the high speed for 30-50 min, the fungus extract is added, the mixture is continuously stirred and mixed, reduced pressure concentration is performed, and the modified sodium silicate binder is prepared, wherein diatomite with the mass 0.03-0.04 times that of the fungus extract is also added. The modified sodium silicate binder has excellent performance and overcomes the defects that traditional sodium silicate has low bonding power and poor water resistance and is prone to dispersion.

Description

technical field [0001] The invention discloses a modified water glass adhesive, which belongs to the field of wood adhesives. Background technique [0002] At present, the adhesives used in the wood industry are mainly organic synthetic resin glues such as phenolic resin glue, urea-formaldehyde resin glue, and melamine-formaldehyde resin glue. Synthetic resin adhesives have high bonding strength, good water resistance, and convenient sizing. However, these resin adhesives have formaldehyde monomer residues, which will release formaldehyde poisonous gases and pollute the environment. Especially when wood is used as a material for interior decoration, living and office furniture, the accumulation of formaldehyde in the indoor air will cause serious damage to human health. Therefore, it is of great significance to develop environmentally friendly and pollution-free wood adhesives. Water glass is a complex solution of various polysilicates. It is a gelling agent with good perf...

Claims

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Application Information

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IPC IPC(8): C09J1/02C09J11/08C09J11/04C09J11/06
CPCC09J1/02C09J11/04C09J11/06C09J11/08
Inventor 许双健殷小祥陈龙
Owner 王敏
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