Polyacrylates with high chemical resistance and pressure sensitive adhesives containing such polyacrylates are increasingly widely used

As electronic devices become more common, the applications of polyacrylates with high chemical resistance and pressure-sensitive adhesives containing such polyacrylates are expanding. This also leads to increasing demands on installed components.

Thus, for example, with the development of electronic devices worn on the body (so-called wearables) such as smartwatches, it is becoming increasingly important that the adhesives used there are highly resistant to various chemicals and lose almost no adhesion even after long-term storage in different media. Increasingly, similar requirements are being made for other electronic devices such as smartphones, tablets, laptops, cameras, camcorders, keyboards, and touchpads. Another area in which chemical-resistant adhesion is important is the use of labels or markers in environments where chemicals may come into contact, such as in the engine compartment.

Generally, a high tolerance to various chemicals is also required for tamper-proof labels. The use of polyacrylate-based adhesives, especially pressure-sensitive adhesives, has been variously described in this field. For example, WO 2016/089687 A1 describes a pressure-sensitive adhesive derived from (derived from) the reaction products of the following components: methyl acrylate 20 to 60 % by weight; 40 to 80 percent by weight ethyl acrylate, propyl acrylate, and/or butyl acrylate; 0.2-5 % by weight functional acrylate monomers and crosslinkers.

WO 2017/132058 A1 discloses a pressure-sensitive adhesive containing a polymer formed by polymerization of the following components: i) 2-ethylhexyl acrylate, butyl acrylate, isobutyl acrylate, 2-propyl heptyl acrylate, n-octyl acrylate, 2-ethylhexyl methacrylate, butyl methacrylate, isooctyl methacrylate, 2-propyl heptyl methacrylate and/or n-octyl methacrylate; ii) acrylonitrile and/or methyl acrylonitrile; And iii) acrylic acid and/or methacrylate. DE 10 2015 215 247 A1 relates to a pressure-sensitive adhesive consisting of at least one or more solid acrylonitrile-butadiene rubbers and adhesive resins as base polymers, in a ratio of 30 to 130phr, and the solid acrylonitrile-butadiene rubber with an acrylonitrile content of 10-30 % by weight.