Formaldehyde-free bean-pulp-base artificial board adhesive and preparation method thereof

Abstract

The invention discloses a formaldehyde-free bean-pulp-base artificial board adhesive and a preparation method thereof. The formaldehyde-free bean-pulp-base artificial board is prepared from 60-70 parts of dispersion medium, 20-35 parts of degreased bean albumen powder, 0.1-0.8 part of sodium hydroxide, 5-10 parts of polyethyleneglycol, 0.5-3 parts of sodium bisulfite, 0.1-2.0 parts of crosslinking reinforcer and 1-5 parts of sodium benzoate. The preparation method comprises the following steps: adding the degreased bean albumen powder, crosslinking reinforcer, sodium hydroxide, sodium bisulfite and polyethyleneglycol into the dispersion medium, stirring uniformly, and keeping the temperature at 60-80 DEG C for 3-6 hours; and cooling the mixture to 25-35 DEG C, adding the sodium benzoate and stirring uniformly. The method is simple in technique and convenient to operate; the produced adhesive is free of formaldehyde, and the main raw materials are derived from renewable substances; and thus, the formaldehyde-free bean-pulp-base artificial board is safe and environment-friendly.

Description

technical field [0001] The invention relates to an artificial board adhesive, in particular to an formaldehyde-free soybean meal-based artificial board adhesive and a preparation method thereof, belonging to the field of artificial board adhesives. Background technique [0002] With the improvement of people's living standards and the continuous and stable development of construction, decoration, packaging and other industries, the output of wood-based panels in my country has grown rapidly. In 2013, the total output of wood-based panels in my country was 272 million m 3 , accounting for about 50% of the world's total production. Among them, the particle board is 13.58 million m 3 , a year-on-year increase of 5.3%; fiberboard 59.83 million m 3 , a year-on-year increase of 4.0%; plywood 157 million m 3 , an increase of 10.5% year-on-year. The total output of wood-based panels, plywood, furniture, and wood flooring has ranked first in the world for many years in a row. ...

AI Technical Summary

Problems solved by technology

For example: 1) Although the use of low molar ratio modified urea-formaldehyde resin adhesives can effectively reduce the formaldehyde emission of wood-based panel products, the bonding strength of the products is often reduced, which cannot meet the requirements of use; and it can lead to prolonged curing time and reduced production efficiency; 2) Adding formaldehyde scavenger to urea-formaldehyde resin adhesives for wood-based panels can effectively reduce the release of free formaldehyde from wood-based panels, but it often reduces the bonding strength of wood-based panels at the same time; at the same time, the price of general formaldehyde scavenger is often much higher than that of urea-formaldehyde resin adhesives. Adding improves product cost and reduces product competitiveness; 3) Carry out post-processing to wood-based panels, as the invention patent application with publication number CN1526528 discloses a method for preparing E1 / EO grade environment-friendly wood-based panels using ammonia vacuum method. Manufacturing process; the utility model patent with publication number CN2394770 discloses a treatment device for reducing formaldehyde emission from wood-based panels. These post-processing methods not only make the manufacturing process of wood-based panels complicated, but also require huge investment in post-processing equipment and significantly increase production costs. ; 4) The use of other environmentally friendly adhesives, such as isocyanate adhesives, has led to a substantial increase in the production cost of wood-based panels and increased difficulty in the production process, which is difficult for enterprises and users to accept; Unglue

In summary, although the above measures can effectively reduce the release of free formaldehyde from wood-based panels, they cannot completely solve the problem of formaldehyde release, or cannot be popularized due to reasons such as high production costs.

[0005] In addition, the currently widely used wood-based panel adhesives also have the problem of dependence on fossil resources of raw materials, which do not meet the requirements of sustainable development

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