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High-starch-content thermosetting artificial board starch adhesive and preparation method thereof

A starch adhesive and wood-based panel technology, which is applied in adhesives, grafted polymer adhesives, manufacturing tools, etc., can solve the problem of high proportion of starch in starch adhesives, achieve the effect of reducing costs and broadening the application field

Pending Publication Date: 2020-08-28
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to make the proportion of starch in the starch adhesive higher, and at the same time, the problem of agglomeration due to uneven reaction will not be caused, and the preparation process will be more stable

Method used

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  • High-starch-content thermosetting artificial board starch adhesive and preparation method thereof
  • High-starch-content thermosetting artificial board starch adhesive and preparation method thereof
  • High-starch-content thermosetting artificial board starch adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Formula (mass / g):

[0047]

[0048]

[0049] Process flow:

[0050] (1) Starch and water are made into starch milk with a mass ratio of 35% on a dry basis of starch, and stirred evenly;

[0051] (2) Heat up the starch milk in step (1) at a rate of 2°C / min, keep it warm for 10min when the temperature reaches 50°C, then continue to heat up to 70°C, dilute 8.6g 12mol / L concentrated hydrochloric acid solution to 0.5mol / L L, added to starch milk for acid hydrolysis, acid hydrolysis for 2.5h, then adding 10mol / L sodium hydroxide solution to adjust the pH to 4; adjust the temperature of the acid hydrolyzed starch milk to 80 °C at a rate of 1 °C / min, pre- Gelatinization for 30min;

[0052] (3) get 0.51g initiator and be dissolved in 40g water and make initiator solution, get and account for initiator solution total mass 15% initiator solution and emulsifier and grafting monomer mix, make seed emulsion, step (2) After cooling the system at a rate of 1°C / min to 70°C, dro...

Embodiment 2

[0058] Formula (mass / g):

[0059]

[0060]

[0061] Process flow:

[0062] (1) Starch and water are made into starch milk with a mass ratio of 35% on a dry basis of starch, and stirred evenly;

[0063] (2) Heat up the starch milk in step (1) at a rate of 2°C / min. When the temperature reaches 50°C, keep it warm for 10 minutes, then continue to heat up to 70°C, keep it warm for 2.5h, and dilute 8.6g of 12mol / L concentrated hydrochloric acid solution 0.5mol / L, add it to starch milk for acid hydrolysis, then add 10mol / L sodium hydroxide solution to adjust pH to 4; adjust the temperature of acid hydrolyzed starch milk to 80℃ at a rate of 1℃ / min, 30min;

[0064] (3) get 0.51g initiator and be dissolved in 40g water and make initiator solution, get and account for initiator solution total mass 15% initiator solution and emulsifier and grafting monomer mix, make seed emulsion, step (2) After cooling the system at a rate of 1°C / min to 70°C, drop the seed emulsion into the reac...

Embodiment 3

[0070] Formula (mass / g):

[0071]

[0072]

[0073] Process flow:

[0074] (1) Starch and water are made into starch milk with a mass ratio of 35% on a dry basis of starch, and stirred evenly;

[0075] (2) Heat up the starch milk in step (1) at a rate of 2°C / min. When the temperature reaches 50°C, keep it warm for 10 minutes, then continue to heat up to 70°C, keep it warm for 2.5h, and dilute 8.6g of 12mol / L concentrated hydrochloric acid solution 0.5mol / L, add it to starch milk for acid hydrolysis, then add 10mol / L sodium hydroxide solution to adjust pH to 4; adjust the temperature of acid hydrolyzed starch milk to 80℃ at a rate of 1℃ / min, 30min;

[0076] (3) get 0.51g initiator and be dissolved in 40g water and make initiator solution, get and account for initiator solution total mass 15% initiator solution and emulsifier and grafting monomer mix, make seed emulsion, step (2) After cooling the system at a rate of 1°C / min to 70°C, drop the seed emulsion into the reac...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a high-starch-content thermosetting artificial board starch adhesive and a preparation method thereof, and belongs to the technical field of adhesive preparation. Under a gradient heating mode, the phenomena of non-uniform reaction and the like caused by agglomeration with overlarge viscosity formed by a high-starch-proportion mixing system in the heating process are avoided, so that the proportion of starch is remarkably increased. According to the process, the reaction time is greatly shortened, the use amount of petroleum monomers is reduced, complex reaction steps are simplified, most importantly, the proportion of starch accounting for the total solid content is increased to 85% or above, the cost of the starch adhesive is greatly reduced, and green manufacturing of the formaldehyde-free artificial board adhesive is achieved. The adhesive disclosed by the invention is good in water resistance and strong in cohesion, various properties of the manufactured artificial board exceed the standard of class II artificial boards, and the adhesive is suitable for mass production and is widely applied to adhesion of hot-pressed wood decorations, artificial boardsand plywood.

Description

technical field [0001] The invention relates to a high-starch content thermosetting starch adhesive for wood-based panels and a preparation method thereof, belonging to the technical field of adhesive preparation. Background technique [0002] With the development of construction and decoration, the demand for wood products in my country's consumer market has greatly increased. However, my country's per capita forest area is small, so the wood-based panels prepared from other non-timber plants have become an excellent way to solve the shortage of timber. At present, most of the wood-based panels on the market are produced by hot pressing process, using the adhesive "trialdehyde glue" with thermosetting properties - urea-formaldehyde resin (UF), phenolic resin (PF) and melamine-formaldehyde resin (MF), but the above-mentioned adhesives are water-resistant Poor performance, non-renewable raw materials, and release a large amount of formaldehyde in the process of production an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J151/02C08F251/00C08F218/08C08F220/58B27N1/02B27D1/04
CPCB27D1/04B27N1/0209C08F251/00C09J151/02C08F218/08C08F220/58
Inventor 李显尧吕欣欣梁尚云季璇程力顾正彪
Owner JIANGNAN UNIV
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