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Degradable adhesive and application thereof in preparation of degradable and recyclable artificial board

A technology of adhesives and additives, applied in the preparation of degradable and recycled wood-based panels, and the field of degradable adhesives, can solve the problems of short service life and adverse consequences of wood-based panels, and achieve the effect of reducing pollution and saving wood resources.

Pending Publication Date: 2021-11-12
DARE WOOD BASED PANEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most places require wood-based panels and their products to have a long service life and long-lasting physical and mechanical properties. However, in some application places, the wood-based panels have a short service life and are mostly disposable, such as: on-site exhibitions, marketing center exhibitions, etc.
If the existing wood-based panels are still used, then these panels that are discarded after one-time use will bring adverse consequences if they are not handled properly

Method used

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  • Degradable adhesive and application thereof in preparation of degradable and recyclable artificial board
  • Degradable adhesive and application thereof in preparation of degradable and recyclable artificial board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of biodegradable adhesives

[0035] The degradable adhesive is an adhesive with a certain viscosity formed by adding auxiliary agents such as tackifier, accelerator, antioxidant and anti-hydrolysis agent to the copolyester.

[0036] Described copolyester synthetic method is as follows:

[0037] (1) Esterification stage: glycolic acid 2mol, lactic acid 5mol, maleic anhydride 0.5mol, butylene glycol 1mol, glycolic acid, lactic acid, maleic anhydride and butylene glycol are added in the reactor in order, Add a titanium dioxide catalyst with 0.5% molar amount of total acid, the stirring rate is 60r / min, and the esterification adopts the method of gradually increasing the temperature and increasing the vacuum: ①Reaction temperature 130°C, vacuum -0.02MPa, esterification time 1h; ②Reaction temperature 150°C, Vacuum-0.04MPa, esterification time 1h; ③reaction temperature 170℃, vacuum-0.07MPa, esterification time 1h; ④reaction temperature 180℃, vacuum-0.08MPa, ester...

Embodiment 2

[0056] Preparation of biodegradable adhesives.

[0057] The degradable adhesive is an adhesive with a certain viscosity formed by adding auxiliary agents such as tackifier, accelerator, antioxidant and anti-hydrolysis agent to the copolyester.

[0058] Described copolyester synthetic method is as follows:

[0059] (1) Esterification stage: glycolic acid 1mol, lactic acid 6mol, maleic anhydride 1mol, butylene glycol 1.8mol, glycolic acid, lactic acid, maleic anhydride and butylene glycol are added in the reactor in order, Add tetrabutyl titanate catalyst with 0.5% molar amount of total acid, the stirring rate is 80r / min, and the esterification adopts the method of gradually raising the temperature and increasing the vacuum: ①reaction temperature 110°C, vacuum -0.02MPa, esterification time 2h; ②reaction Temperature 140°C, vacuum -0.04MPa, esterification time 1h; ③ reaction temperature 160°C, vacuum -0.07MPa, esterification time 1h; ④ reaction temperature 170°C, vacuum -0.08MPa,...

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Abstract

The invention belongs to the technical field of polymer adhesives, and relates to a degradable adhesive, in particular to a degradable adhesive, which at least comprises the following components in parts by mass: 60 to 90 parts of copolyester, 5 to 20 parts of tackifier, 1 to 10 parts of accelerant, 0.1 to 2 parts of antioxidant and 1 to 5 parts of anti-hydrolysis agent. The invention further discloses application of the degradable adhesive in preparation of a degradable and recyclable artificial board. According to the invention, ester bonds of the degradable adhesive are easy to break due to the influence of water, oxygen, light and the like in the environment, the strength of the adhesive is gradually reduced, the adhesive effect is lost at first, and the adhesive is finally decomposed into carbon dioxide and water, and the adhesive is retained by bonded and hot-pressed wood shavings and can be recycled after being treated. The board prepared by the invention has the characteristic of degradability, can be used as a disposable board, not only can reduce the environmental pollution caused by waste artificial boards, but also saves wood resources.

Description

technical field [0001] The invention belongs to the technical field of polymer adhesives, and relates to a degradable adhesive, in particular to a degradable adhesive and its application in the preparation of degradable recycled wood-based panels. Background technique [0002] Wood-based panels are boards or molded products that are made of wood or other non-wood plant fibers, separated into various material units by mechanical processing, and glued with or without adhesives and other additives, mainly including plywood, particle board, Fiberboard three categories of products. Wood-based panels have good physical and mechanical properties and processability, and are widely used in furniture, decoration, construction, packaging and other related industries. In 2019, the total consumption of wood-based panels in China is about 293.76 million cubic meters, of which the consumption of plywood is 187.64 million cubic meters, the consumption of fiberboard is 58.66 million cubic m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/06B27N3/00B27N3/02B27N3/08C08G63/60C08G63/85C08G63/86
CPCC08L67/06C08G63/60C08G63/866C08G63/85B27N3/02B27N3/08B27N3/002
Inventor 王丽陈秀兰王俊伟李平源
Owner DARE WOOD BASED PANEL GRP
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