Acrylic pressure sensitive adhesive-double sided adhesive

Double-sided tape used to engage and fix parts can be widely used in vehicles and homes, especially in the interior of electronic machines. However, in recent years, several problems have been raised with the use of these adhesive tapes. For example, there are white fog caused by volatile components with high boiling points on the glass inside a car, and problems such as poor operation of electronic machines caused by volatile components or impurities with high boiling points. As a result, adhesive strips used in enclosed Spaces such as cars, houses, and electronic machines are required to have a low amount of volatile gases, which can negatively affect the environment, as well as low odor.

In response to this problem, in the housing sector in Japan, the Ministry of Health, Welfare, and Labor has issued guidelines to reduce the total amount of volatile organic compounds, while sticking to the previous principle of reducing the amount of volatile organic compounds in a single room as a countermeasure to the intensive housing. In addition, the German Automobile Industry Association (VDA) has adopted VDA270 as an evaluation method for odor of components used in cars, and VDA277 and VDA278 as volatile components. In addition, the German Industry Association establishes German Industry Standard No. 75201 in order to determine the signs of white fog produced by volatile components produced by components. This requires not only the reduction of specific volatile substances, but also the reduction of a wide variety of volatile substances in various fields.

As the cause of volatile gases produced by common adhesive strips, examples can be given as residual solvents, residual monomers, residual polymerization initiators, and viscosifiers used to improve adhesive properties. The same causes of odor can be cited as volatile gases.

In bulletin No. 6-122859, a method for obtaining a binder with few remaining monomers by polymerization of monomers with high molecular weight and low saturation vapor was disclosed. In addition, in the communique No. 2-115291 of Takaepyeong, a binder that uses acrylic polymers made from specific oleic acid monomers to reduce odor was announced. On the other hand, in Bulletin No. 2002-69411, the following method for the manufacture of adhesive strips is disclosed, that is, in order to reduce volatile components, solution polymerization is carried out by using a specific amount of azo polymerization initiator and setting a specific reaction temperature. A high purity acrylic polymer with few volatile components such as residual initiator and unreacted monomer is generated with a high polymerization rate, and then adhesive obtained from this adhesive is used to manufacture adhesive tape. In Bulletin No. 2002309210 of Special Kaiping, adhesive strips with low gas emission levels obtained by block copolymerization are disclosed. In addition, the manufacturing method of hot-melt adhesive tape as an anti-fog adhesive tape is disclosed in the communique No. 11-315260 of the Special Kaiping.