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Adhesive composition for solid wood composite artificial board

A solid wood composite and composition technology, applied in the direction of adhesive types, polyurea/polyurethane adhesives, non-polymer adhesive additives, etc. Improved pot life and high strength

Active Publication Date: 2021-10-22
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the spraying is too long, it will cause environmental pollution and cause harm to the human body; after the isocyanate is cured, it will adhere to the surface of the equipment and cause damage to the equipment; cause a lot of inconvenience

Method used

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  • Adhesive composition for solid wood composite artificial board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Modified isocyanate preparation comprises the following steps:

[0062] (1) Zinc niobate is dried; the drying temperature is 120°C, the drying time is 4 hours, and the moisture content is 0.07%;

[0063] (2) Mix 10g (1 part by mass) of zinc niobate into 10g of ethyl acetate and add dropwise to 1000g (100 parts by mass) of isocyanate, heat up during the dropping process, keep at 50°C for 4h and then remove the solvent to obtain a modified Isocyanate adhesive, the test viscosity is 300cP, and the ethyl acetate content is 75ppm.

[0064] The preparation process of solid wood composite wood-based panels includes the following steps:

[0065] S1: Add 100g (10 parts by mass) of white dextrin and 100g (10 parts by mass) of flour filler to 1500g (150 parts by mass) of water at 75°C and mix for 30min, then add 1000g (100 parts by mass) of modified isocyanate and 5g (0.5 parts by mass) calcium propionate antiseptic, obtains the adhesive composition containing water;

[0066] S...

Embodiment 2

[0069] Modified isocyanate preparation comprises the following steps:

[0070] (1) Zinc niobate is dried; the drying temperature is 120°C, the drying time is 4 hours, and the moisture content is 0.06%;

[0071] (2) Mix 200g (20 parts by mass) of zinc niobate into 200g of ethyl acetate and add it dropwise to 1000g (100 parts by mass) of isocyanate, raise the temperature during the dropwise addition, keep at 90°C for 2 hours, and then remove the solvent to obtain a modified Isocyanate adhesive, the test viscosity is 1000cP, and the ethyl acetate content is 85ppm.

[0072] The preparation process of solid wood composite wood-based panels includes the following steps:

[0073] S1: Add 150g (15 parts by mass) of white dextrin and 150g (15 parts by mass) of flour filler to 1500g (150 parts by mass) of water at 75°C and mix for 30min, then add 1000g (100 parts by mass) of modified isocyanate and 5g (0.5 parts by mass) calcium propionate antiseptic, obtains the adhesive composition ...

Embodiment 3

[0077] Modified isocyanate preparation comprises the following steps:

[0078] (1) Dry magnesium niobate; the drying temperature is 130°C, the drying time is 4 hours, and the moisture content is 0.03%;

[0079] (2) Mix 50g (5 parts by mass) of magnesium niobate into 50g of ethyl acetate and add it dropwise to 1000g (100 parts by mass) of isocyanate, raise the temperature during the dropwise addition, keep it at 70°C for 2h, and then remove the solvent to obtain a modified Isocyanate adhesive, the test viscosity is 472cP, and the ethyl acetate content is 80ppm.

[0080] The preparation process of solid wood composite wood-based panels includes the following steps:

[0081] S1: Add 500g (50 parts by mass) of white dextrin and 500g (50 parts by mass) of flour filler to 2500g (250 parts by mass) of water at 75°C and mix for 30min, then add 1000g (100 parts by mass) of modified isocyanate and 10g (1 mass part) calcium propionate preservative, obtains the adhesive composition cont...

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Abstract

The invention provides an adhesive composition for a solid wood composite artificial board. The composition comprises three components: a component A, a component B and a component C, wherein the component A is a niobate modified isocyanate adhesive; the component B is a powder filler; and the component C is a preservative. The isocyanate-based formaldehyde-free adhesive has the advantages of good initial adhesion, strong flowability and long working life. The solid wood composite artificial board prepared by the adhesive has the characteristics of high bonding strength, good water resistance, no formaldehyde and environment friendliness.

Description

technical field [0001] The invention belongs to the field of wood adhesives, in particular to an adhesive composition for solid wood composite wood-based panels. Background technique [0002] Wood-based panels are boards or molded products made of wood or other non-wood plants as raw materials, which are separated into various unit materials after certain mechanical processing, and then recombined and hot-pressed after applying adhesives. my country is a big producer of wood-based panels. In 2018, the total output of wood-based panels was 299 million cubic meters, an increase of about 1.4% over 2017. China's wood-based panel production accounts for 50%-60% of the world's total wood-based panel production. In 2018, my country's plywood output was 178.98 million cubic meters, a year-on-year increase of 4.1%. In the past 10 years, the average annual growth rate of the output of plywood products in my country has reached 17.5%, which is still the fastest growing type of wood-ba...

Claims

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Application Information

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IPC IPC(8): C09J175/04C09J11/06C08G18/64
CPCC09J175/04C09J11/06C08G18/6484C08G18/64C08K5/098
Inventor 李厚义涂松张梓军胡兵波辛波宫成袁旻
Owner WANHUA CHEM GRP CO LTD