Preparation method for water-based heat-conducting environmentally-friendly adhesive

Abstract

The invention belongs to the technical field of adhesives, and specifically relates to a preparation method for a water-based heat-conducting environmentally-friendly adhesive. The water-based heat-conducting environmentally-friendly adhesive prepared by using the preparation method disclosed by the invention has excellent initial adhesion, can be used for adhering different types of base materials, provides a comprehensive solution, and has the advantages of no bubbles, no edge warping, water boiling resistance and high temperature resistance. Meanwhile, the problem that a high-initial-adhesion water-based adhesive is low in viscosity in winter is solved; meanwhile, a positioning adhesion effect can be rapidly achieved; safety and environmental protection are guaranteed; meanwhile, a product has excellent initial adhesion strength, washing resistance, heat conduction and high-temperature resistance; a toxic and harmful cross-linking agent is not used; and good heat conduction performance is achieved on the premise that heat conduction metal particles are not contained.

Description

technical field [0001] The invention belongs to the technical field of adhesives, in particular to a method for preparing a water-based heat-conducting environmental-friendly adhesive. Background technique [0002] Chinese tallow tree is an important oil tree species in Chinese history, but since the 1970s, with the rapid development of the chemical industry, the demand for Chinese tallow tree seeds has decreased year by year, and there is no economic value. Many people cut down Chinese tallow tree, but Sapium still has potential application value. Dopamine is a neurotransmitter, a chemical substance used to help cells transmit impulses. It is mainly responsible for the brain's desire, sensation, and information transmission of excitement and happiness. It is also related to addiction. Dopamine is a precursor for the synthesis of norepinephrine in the body. Use vanillin as raw material to condense with nitromethane, reduce with zinc amalgam and hydrochloric acid, and hydrol...

AI Technical Summary

Problems solved by technology

In order to meet the needs of society and environmental protection, the types of adhesives should be updated quickly to produce environmentally friendly green adhesives. There is no tolerance for the safety and environmental protection of the home decoration environment and clothing, which can meet all your needs. Water-based adhesives Adhesive is an environmentally friendly adhesive prepared from natural polymers or synthetic polymers, using water as a solvent or dispersant to replace toxic organic solvents that pollute the environment, including: polyethylene Alcohols, ethylene acetates, acrylates, polyurethanes, epoxies, phenolics, silicones, rubbers, etc. However, the above-mentioned water-based adhesives generally have slow drying speed and non-polar adhesives. For problems such as poor substrate wettability, low initial viscosity, poor water resistance and heat resistance, people often improve such defects by adding cross-linking agents, but additional cross-linking agents increase production costs, and some The cross-linking agent is also toxic, including MOCA cross-linking agent carcinogenic or free TDI, such as adding a cross-linking agent to water-based polyurethane during use, the cross-linking agent reacts with polyurethane molecules to cross-link, and the external linking method is equivalent to two groups At present, almost all water-based polyurethanes produced at home and abroad are single-component, and other types of water-based adhesives also have similar significant defects.

For example, Chinese patent CN2016103415481 discloses "a water-based adhesive and its preparation method", which prepares a water-based adhesive with fast curing, strong initial adhesion and excellent holding power, but it still inevitably has heat resistance. Disadvantages of poor durability and water resistance

For example, Chinese patent CN104312443B discloses "a high-performance formaldehyde-free adhesive for wood products and its preparation method" using a mussel-like adhesive protein polymer (polydopamine) to enhance the adhesion of water glass glue to wood, Polydopamine has the characteristics of fast adhesion, corrosion resistance, high bonding strength, and non-toxicity, but it only uses the chemical properties of dopamine itself, and there is no obvious physical or chemical relationship with other components including water glass. The interaction and bonding effect are poor, and it uses dopamine hydrochloride, and prepares an alkaline water glass adhesive. However, dopamine hydrochloride is easily inactivated in lye and cannot exist stably, which is the basic knowledge of pharmacology. , even if a buffer is used, the alkalinity cannot be disappeared, and even if the alkalinity of the water glass disappears, it will not have good viscosity and the bonding effect is not good. For the above-mentioned technical problems, those skilled in the art urgently need Developed a preparation method of a water-based heat-conducting environmental protection adhesive to meet the existing technical requirements and extensive market demand

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