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Additive of phenolic resin as well as preparation method and application of additive

A technology of phenolic resin and additives, which is applied in the field of phenolic resin additives, phenolic resin adhesives, phenolic resin additives for wood-based panels, and the preparation field. Reduce the period of time and other issues, to achieve the effect of reducing consumption, shortening the hot pressing time, and improving the bonding strength

Active Publication Date: 2014-12-17
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

Soybean powder, defatted soy protein powder and flour are usually used to reduce the cost of phenolic resin, but because these substances are raw materials of some agricultural and sideline foods, the price is relatively high, so the range of reducing the cost of phenolic resin is very limited
Moreover, the addition of these substances often leads to the disadvantages of long curing time, low bonding strength, short pot life, and poor usability of phenolic resins.
Adding carbonates such as sodium carbonate to phenolic resin can increase the curing speed of the resin, but it will cause the disadvantages of reducing the pot life of the resin and reducing the bonding strength.

Method used

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  • Additive of phenolic resin as well as preparation method and application of additive
  • Additive of phenolic resin as well as preparation method and application of additive
  • Additive of phenolic resin as well as preparation method and application of additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] An additive for phenolic resin, based on the total mass of the additive as 100%, each component and mass percentage are as follows:

[0036]

[0037] A kind of preparation method of the additive of phenolic resin, described method concrete steps are as follows:

[0038] (1) Mix 10kg urea, 13kg formaldehyde and 0.5kg melamine evenly, add 0.1kg formic acid, stir evenly; heat to 85°C, keep warm until the viscosity of Tu 4 is 12 seconds, cool down to 70°C, add 30% sodium hydroxide solution , adjust the pH value to 7.5, react for 15 minutes, cool down to 30°C, and discharge to obtain a melamine-modified urea-formaldehyde resin prepolymer;

[0039] (2) Evenly disperse 50 kg of camellia oleifera cake powder in 40 kg of water, add 5 kg of melamine-modified urea-formaldehyde resin prepolymer and stir evenly to obtain mixture a; keep mixture a at 50° C. for 2 hours to obtain mixture b;

[0040] (3) Cool the mixture b to 30° C., add 4.5 kg of sodium carbonate and 0.5 kg of sod...

Embodiment 2

[0044] An additive for phenolic resin, based on the total mass of the additive as 100%, each component and mass percentage are as follows:

[0045]

[0046] A kind of preparation method of the additive of phenolic resin, described method concrete steps are as follows:

[0047] (1) Mix 10kg urea, 13kg formaldehyde and 0.5kg melamine evenly, add 0.1kg formic acid, stir evenly; heat to 85°C, keep warm until the viscosity of Tu 4 is 15 seconds, cool down to 70°C, add 30% sodium hydroxide solution , adjust the pH value to 7.5, react for 15 minutes, cool down to 30°C, and discharge to obtain a melamine-modified urea-formaldehyde resin prepolymer;

[0048] (2) Evenly disperse 20 kg of camellia oleifera cake powder in 58 kg of water, add 15 kg of melamine-modified urea-formaldehyde resin prepolymer and stir evenly to obtain mixture a; keep mixture a at 70° C. for 3 hours to obtain mixture b;

[0049] (3) Cool the mixture b to 30° C., add 5 kg of glycerol acetate and 2 kg of borax,...

Embodiment 3

[0053] An additive for phenolic resin, based on the total mass of the additive as 100%, each component and mass percentage are as follows:

[0054]

[0055]

[0056] A kind of preparation method of the additive of phenolic resin, described method concrete steps are as follows:

[0057] (1) Mix 10kg urea, 13kg formaldehyde and 0.5kg melamine evenly, add 0.1kg formic acid, stir evenly; heat to 85°C, keep warm until the viscosity of Tu 4 is 13 seconds, cool down to 70°C, add 30% sodium hydroxide solution , adjust the pH value to 7.5, react for 15 minutes, cool down to 30°C, and discharge to obtain a melamine-modified urea-formaldehyde resin prepolymer;

[0058] (2) Evenly disperse 20 kg of camellia oleifera cake powder in 70 kg of water, add 6 kg of melamine-modified urea-formaldehyde resin prepolymer and stir evenly to obtain mixture a; keep mixture a at 60° C. for 2.5 hours to obtain mixture b;

[0059] (3) Cool the mixture b to 30° C., add 3 kg of propylene carbonate and ...

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Abstract

The invention discloses an additive of phenolic resin as well as a preparation method and an application of the additive, and belongs to the field of wood adhesives. The additive mainly comprises oil-tea-cake, a crosslinking agent, a curing accelerator, a stabilizer and water. The preparation method comprises the following steps: evenly dispersing oil-tea-cake powder into water; adding the crosslinking agent and evenly stirring; carrying out thermal reaction at 50-70 DEG C for 2-3 hours, and cooling to 30 DEG C; and adding the curing accelerator and the stabilizer, evenly stirring and carrying out thermal reaction for 0.5-1 hour, so as to obtain the additive of the phenolic resin, wherein the additive is applied to an adhesive of the phenolic resin. The curing speed and the bonding strength of the adhesive of the phenolic resin can be effectively improved, the hot-pressing time of plywood is shortened, and the hydrolytic resistance of the plywood can be significantly improved, and thus the production efficiency is improved, and the energy consumption and the manufacturing cost are reduced. The additive of the phenolic resin has social significances of energy conservation and emission reduction, and the preparation method is simple, and convenient to operate.

Description

technical field [0001] The invention relates to an additive, preparation method and application of a phenolic resin, in particular to an additive, a preparation method of a phenolic resin for wood-based panels and the application of the additive to a phenolic resin adhesive, which belongs to the field of wood adhesives. Background technique [0002] Phenolic resin (PF resin) is the earliest industrialized synthetic resin in the world. It is mainly used in the manufacture of various plastics, coatings, adhesives, synthetic fibers, and fireproof materials. It is an extremely important polymer material. As an adhesive, phenolic resin has the advantages of high bonding strength, boiling water resistance, heat resistance, weather resistance, and chemical corrosion resistance. It is widely used in the field of wood processing and is a common adhesive for wood-based panels in outdoor structures. In recent years, with the increasing demand for oriented strand board, laminated lumber...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/098C08K3/32C08K5/109C09J11/06C09J161/06C09J11/08C08L89/00C09J11/04C08L61/30C08K3/26C08K5/103C08L61/06C08K3/38
Inventor 范东斌储富祥李改云秦特夫
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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