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 adhes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1

[0021] The fungus was washed 5 times with deionized water, dried in a vacuum freeze-drying box for 30 min to obtain dry fungi, and then the dried fungi were placed in a freeze pulverizer for freezing and pulverizing for 25 min to obtain cell powder, which was added with water. In the beaker, move the beaker into a digital display speed measuring constant temperature magnetic stirrer, under the condition of temperature of 40 ° C and rotation speed of 500 r / min, constant temperature stirring and mixing for 20 minutes, to obtain a mixed solution, and then filter the mixed solution to obtain a filtrate, and set the filtrate to 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, and concentrate under reduced pressure for 40min to obtain a concentrated solution, which is vacuum freeze-dried for 2h to obtain a fungal extraction. Then, in parts by weight, take 40 pa...

Example Embodiment

[0022] Example 2

[0023] In parts by weight, take 100 parts of water, 10 parts of agar, 40 parts of silicone-acrylic emulsion and 180 parts of water glass in turn, add agar and water to a beaker, heat at 98°C and 500r / min. Stir and dissolve for 10 minutes to obtain agar liquid, then place the agar liquid in an ice-water bath at 4°C, stir and cool at a rotational speed of 600 r / min for 30 minutes to obtain a cooling agar liquid; transfer the obtained cooling agar liquid to a mixer, and then add it to the mixer. Add silicone-acrylic emulsion and water glass to the mixer, stir at a high speed for 50min under the condition of a rotating speed of 1600r / min, and then transfer the material of the mixer into an ultrasonic disperser, and under the condition of an ultrasonic frequency of 50kHz, ultrasonically disperse for 45min. Obtain the dispersion, then place the dispersion in a pear-shaped flask, fix the pear-shaped flask on a rotary evaporator, adjust the pressure of the rotary ev...

Example Embodiment

[0024] Example 3

[0025] The fungus was washed 5 times with deionized water, dried in a vacuum freeze-drying box for 30 min to obtain dry fungi, and then the dried fungi were placed in a freeze pulverizer for freezing and pulverizing for 25 min to obtain cell powder, which was added with water. In the beaker, move the beaker into a digital display speed measuring constant temperature magnetic stirrer, under the condition of temperature of 40 ° C and rotation speed of 500 r / min, constant temperature stirring and mixing for 20 minutes, to obtain a mixed solution, and then filter the mixed solution to obtain a filtrate, and set the filtrate to 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, and concentrate under reduced pressure for 40min to obtain a concentrated solution, which is vacuum freeze-dried for 2h to obtain a fungal extraction. Then, in parts by weight, take 40 part...

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PUM

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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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