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A kind of modified phenolic resin for producing outdoor recombined bamboo and its preparation method

A phenolic resin, modified technology, applied in the direction of aldehyde/ketone condensation polymer adhesives, adhesive types, adhesives, etc. The effect of improving flexibility and improving wettability

Active Publication Date: 2018-10-30
广西玉林利而安化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the processing and manufacturing of recombined bamboo materials use low molar ratio phenolic resin, but almost all of them follow the formula and production process of wood-based panels, resulting in high bonding strength, poor impregnation penetration, high brittleness, short product life cycle and high cost. ; The content of free phenol and free aldehyde is high, which seriously pollutes the environment and affects the physical and mental health of workers.

Method used

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  • A kind of modified phenolic resin for producing outdoor recombined bamboo and its preparation method
  • A kind of modified phenolic resin for producing outdoor recombined bamboo and its preparation method
  • A kind of modified phenolic resin for producing outdoor recombined bamboo and its preparation method

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Effect test

Embodiment 1

[0030] The present invention is used to produce a kind of embodiment of the modified phenolic resin of outdoor recombinant bamboo, the preparation method of the modified phenolic resin described in this embodiment is:

[0031] 1) First add formaldehyde aqueous solution I and alkaline aqueous solution I, start stirring and then add urea, heat up to 55°C and stir for 8 minutes;

[0032] 2) After the stirring is completed, add phenol I and alkaline aqueous solution II, and control the temperature at 65°C during the addition process; after the addition is completed, the exothermic reaction that starts causes the solution to heat up to 80°C;

[0033] 3) keep warm at 80°C until the viscosity value measured at 30°C reaches 70cps;

[0034] 4) Cool down immediately and add water. When the solution cools down to 70°C, add phenol II and alkaline aqueous solution III, and keep warm at 60°C for 110 minutes; immediately add melamine and phenol III, then add formaldehyde aqueous solution II ...

Embodiment 2

[0041] The present invention is used to produce another kind of embodiment of the modified phenolic resin of outdoor recombinant bamboo, the preparation method of the modified phenolic resin described in this embodiment is:

[0042] 1) First add formaldehyde aqueous solution I and alkaline aqueous solution I, start stirring, then add urea, heat up to 60°C and stir for 10 minutes;

[0043] 2) After the stirring is completed, add phenol I and alkaline aqueous solution II, and control the temperature at 60°C during the addition process; after the addition is completed, the exothermic reaction that starts causes the solution to heat up to 83°C;

[0044] 3) keep warm at 80°C until the viscosity value measured at 30°C reaches 76cps;

[0045] 4) Cool down immediately and add water. When the solution cools down to 70°C, add phenol II and alkaline aqueous solution III, and keep warm at 64°C for 118 minutes; immediately add melamine and phenol III, then add formaldehyde aqueous solution...

Embodiment 3

[0052] The present invention is used to produce another kind of embodiment of the modified phenolic resin of outdoor recombinant bamboo, the preparation method of the modified phenolic resin described in this embodiment is:

[0053] 1) First add formaldehyde aqueous solution I and alkaline aqueous solution I, start stirring, then add urea, heat up to 65°C and stir for 15 minutes;

[0054] 2) After the stirring is completed, add phenol I and alkaline aqueous solution II, and control the temperature at 50°C during the addition process; after the addition is completed, the exothermic reaction that starts causes the solution to heat up to 85°C;

[0055] 3) Insulate at 85°C until the viscosity value measured at 30°C reaches 80cps;

[0056] 4) Cool down immediately and add water. When the solution cools down to 70°C, add phenol II and alkaline aqueous solution III, and keep warm at 65°C for 130 minutes; immediately add melamine and phenol III, then add formaldehyde aqueous solution ...

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Abstract

The invention discloses a modified phenolic resin used for outdoor recombination bamboo production and a preparation method thereof. The modified phenolic resin is prepared from the components of phenol, a formaldehyde aqueous solution, an alkaline aqueous solution, urea, melamine, a polyvinyl formal aqueous solution and water. In the preparation process of the modified phenolic resin, the phenol, the formaldehyde aqueous solution and the alkaline aqueous solution are added stepwise and fully react. The comprehensive performance of the modified phenolic resin is improved by changing preparation raw materials and improving the preparation method, the solid content of the modified phenolic resin is increased, the viscosity and the flexibility of the modified phenolic resin are improved, and the wettability of the modified phenolic resin is ensured.

Description

technical field [0001] The invention belongs to the technical field of chemical resin preparation, and in particular relates to a modified phenolic resin used for producing outdoor recombined bamboo and a preparation method thereof. Background technique [0002] In recent years, premium woods such as hardwoods have become less available and more expensive. The aggravation of the contradiction between the supply and demand of wood seriously restricts the development of the furniture industry. In order to solve this problem, researchers continue to innovate and explore, and develop a variety of new materials, new processes and new technologies. [0003] Reconstituted bamboo is a new technological material developed in recent years, widely used in furniture, indoor and outdoor flooring, indoor and outdoor decoration, handicraft accessories, container flooring and load-bearing beams and other industries. Because phenolic resin has excellent mechanical properties, weather resis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G14/08C08G14/10C08G14/12C09J161/34
CPCC08G14/08C08G14/10C08G14/12C09J161/34
Inventor 邱海文
Owner 广西玉林利而安化工有限公司
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