Environmental Problems and Countermeasures of Adhesives (I)

The rapid development of science and technology, industrial modernization and the concentration of urban population have brought about increasingly serious environmental pollution, especially the environmental and ecological crisis caused by chemical pollution, which has become an important factor affecting the national economy and social development.

The rapid development of the adhesive industry has provided the society with many new types of rubber, and it has also brought new pollution problems to the environment. The function and application of adhesives have received widespread attention, and the environmental problems of adhesives are often overlooked. However, with the increasing awareness of environmental awareness and health awareness, the requirements for the environmental protection of adhesives will become more stringent. It is even more important to protect the environment. Producers are pushing for environmentally friendly green adhesives. Users are eager to use non-toxic and non-toxic substances. Harmful adhesive. Therefore, it is very important to understand the environmental issues of adhesives.

Adhesive environmental issues

The environmental problems of adhesives are mainly environmental pollution and human health hazards. This is due to harmful substances in adhesives, such as volatile organic compounds, toxic curing agents, plasticizers, thinners and other additives, and harmful fillers. Caused by.

Many adhesives have potential causes of environmental pollution to varying degrees. Only by clearly understanding the types and hazards of these pollutants can they be eliminated and prevented. The harmful substances in adhesives are mainly benzene, toluene, formaldehyde, methanol, styrene, chloroform, carbon tetrachloride, 1,2-dichloroethane, toluene diisocyanate, m-phenylenediamine, tricresyl phosphate, Ethylenediamine, dimethylaniline, antioxidant D, coal tar, asbestos powder, quartz powder, etc.

Solution to Environmental Problems of Adhesives

Change traditional concepts and enhance environmental awareness

Environmental protection is the key to ensure sustainable economic development and human health in the 21st century. The adhesive industry has a major responsibility for the impact on the environment and it is wise to take effective measures early. First of all, it is necessary to change the traditional concepts, not only the immediate local interests, but neglect the damage to the ecological environment; not only temporary economic benefits, but at the expense of the environment, the adhesive industry should pay attention to the society while pursuing economic benefits. Benefits and environmental benefits make new contributions to environmental protection.

Develop environmentally friendly adhesives

In order to avoid environmental pollution and ecological damage, it is imperative to develop environmentally friendly adhesives with low pollution or no pollution. The so-called environment-friendly green adhesives are adhesives that are environmentally friendly, harmless to the human body, and meet the three requirements of “environmental protection, health, and safety”.

In order to meet the needs of society and environmental protection, the variety of adhesives should be accelerated and replaced, and its development direction is water-based, solid, non-solvent, and low toxicity.

Water based

Water-based adhesives use water as a solvent or dispersion medium to make water-based adhesives, eliminating the need for organic solvents and eliminating solvent contamination. It should be noted that not all water-based adhesives are non-polluting. For example, urea-formaldehyde glue and 107-gel are also water-based glues, and the contamination is serious.

Emulsion acrylate pressure-sensitive adhesives can replace solvent-based pressure-sensitive adhesives.

Water-based laminating adhesives have begun to replace solvent-based laminating adhesives. They are non-toxic, non-flammable, non-hazardous, and safe to use.

Japan has successfully developed a new type of water-based polyurethane adhesive that is suitable for automotive interior decoration and may completely replace the current generic solvent-based adhesive, which is very beneficial to improve the environment.

The polyisocyanate (PVA) aqueous solution is formulated with isocyanate or prepolymer to make a vinyl urethane emulsion, which can replace urea-formaldehyde rubber and thoroughly solve the formaldehyde release problem.

Waterborne adhesives are popular because they are non-toxic and non-polluting. However, their disadvantages include slow drying speed, poor water resistance, and poor antifreeze. The solid part should be increased, the drying speed must be increased, and the cross-linking method should be adopted to increase the drying speed and water resistance so as to expand its application.

(to be continued)