Weatherproof vegetable protein adhesive curing at room temperature and preparation method thereof

A plant protein glue, room temperature curing technology, applied in the formulation and preparation of weather-resistant vegetable protein adhesives, can solve the problems of short storage period of adhesives, unfavorable industrialization promotion, no anti-corrosion treatment, etc., and shorten the pre-treatment Time, less energy consumption, good weather resistance

Inactive Publication Date: 2015-07-22
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention patent with the authorization number CN 101955748 B provides "a formaldehyde-free corn gluten powder wood adhesive and its preparation method". The adhesive prepared by this patent can be hot-pressed or cold-pressed, and the bonding strength after curing is It can reach the level of type I or type II glue; however, the reaction temperature in the preparation process of the adhesive is low, and there is no subsequent anti-corrosion treatment, which will easily lead to a short storage period of the adhesive, which is not conducive to industrialization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]140 parts of boiler condensed water and 35 parts of defatted soybean powder were respectively added to the reaction kettle with the vacuum condensing device, the stirring speed was controlled to be 120 rpm, and the stirring was performed at 20°C for 60 minutes; 0.7 part of 30wt% Hydrochloric acid, heat up to 40°C, add 0.75 part of hemicellulase, and react for 60 minutes; heat up to 80°C, add 4 parts of 3-isopropenyl-α,α-dimethylbenzyl isocyanate, and react for 20 minutes by grafting; Add 8 parts of polyvinyl alcohol 1788, keep stirring until there are no obvious particles; adjust pH=4.4 with 50wt% sulfuric acid, add styrene (3.5 parts) with 1 / 10 of the total styrene, and stir for 5 minutes; add 2wt% persulfuric acid The ammonium persulfate solution (1.5 parts) of 1 / 4 of the total ammonium solution was stirred for 20 minutes; then the remaining styrene (31.5 parts) and the ammonium persulfate solution (4.5 parts) were added dropwise, and the dripping time was controlled to...

Embodiment 2

[0037] 330 parts of distilled water and 65 parts of corn gluten meal were respectively added to the reaction kettle with the vacuum condensing device, the rotating speed of the stirrer was controlled to be 90 rpm, and the temperature was kept at 20° C. for 30 minutes; 2.1 parts of 35wt% acetic acid were added, The temperature was raised to 50°C, 3.50 parts of cellulase were added, and the reaction was carried out for 20 minutes; the temperature was raised to 70°C, 7 parts of N-methylol acrylamide were added, and the graft reaction was carried out for 50 minutes; 8 parts of polyvinyl alcohol 2099 were added, and the temperature was kept and stirred until no Obvious particles; adjust pH=4.0 with 20wt% hydrochloric acid, add styrene (7.5 parts) with 1 / 10 of the total amount of styrene, and stir for 6 minutes; add 3wt% potassium persulfate solution with 1 / 4 of the total potassium persulfate solution (2.5 parts), stirred for 30 minutes; then the remaining styrene (67.5 parts) and po...

Embodiment 3

[0039] Add 300 parts of distilled water and 60 parts of peanut flour to the reactor with vacuum condensing device, control the stirring speed to be 110 rpm, keep stirring at 25°C for 50 minutes; add 1.5 parts of 30wt% hydrobromic acid , raise the temperature to 40°C, first add 1.00 parts of hemicellulase, then add 0.50 parts of cellulase, and react for 30 minutes; raise the temperature to 78°C, add 5 parts of 3-isopropenyl-α,α-dimethylbenzyl Isocyanate, graft reaction for 25 minutes; add 12 parts of polyvinyl alcohol 2488, keep stirring until there are no obvious particles; adjust pH=4.5 with 30wt% sulfuric acid, add styrene (7.0 parts) with 1 / 10 of the total amount of styrene, and stir 5 minutes; add ammonium persulfate solution (1.0 part) which is 1 / 4 of the total amount of 5wt% ammonium persulfate solution, stir for 25 minutes; then add the remaining styrene (63.0 parts) and ammonium persulfate solution (3.0 parts) dropwise, control The dropwise addition time was 6 hours; a...

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Abstract

The invention discloses a weatherproof vegetable protein adhesive curing at room temperature and a preparation method thereof. The preparation method of the weatherproof vegetable protein adhesive curing at room temperature is as below: conducting enzymolysis, graft copolymerization and vacuumizing treatment on the following raw materials: 35-65 parts of a vegetable protein powder, 140-330 parts of water, 0.7-2.1 parts of an acid solution, 0.75-3.50 parts of bio-enzyme, 4-7 parts of a grafting agent, 8-15 parts of polyvinyl alcohol, 35.0-75.0 parts of polymer monomer, 4.0-10.0 parts of an initiator, a proper amount of an acidic pH regulator, a proper amount of alkali pH regulator and 20-45 parts of a crosslinking agent. The adhesive has the advantages of easily available materials, no formaldehyde release, good environmental performance, bonding strength reaching requirements of grade I adhesive (weatherability), capability of curing at room temperature and wide applicability.

Description

technical field [0001] The invention belongs to the technical field of wood adhesive preparation; more particularly, relates to a formulation and preparation of a weather-resistant vegetable protein adhesive based on biomass material, which can be used in wood processing, building decoration and other industries and has good environmental performance and is cured at room temperature method. Background technique [0002] With the improvement of human awareness of environmental protection and sustainable development, natural adhesives based on renewable resources have attracted people's attention. There are many kinds of renewable resources that can be used to prepare natural adhesives, such as vegetable starch, vegetable protein, vegetable oil, pectin, lignin, tannin, etc. Among them, plant protein has become an important research object because of its many functional groups and high activity. Among the many biomasses containing vegetable protein, defatted soybean meal, cor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J151/00C09J129/04C08F289/00
Inventor 林巧佳陈奶荣饶久平曾钦志
Owner FUJIAN AGRI & FORESTRY UNIV
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