Fotoreaktwne poliakrylanowe kleje samoprzylepne
Journal Title: Wiadomości Chemiczne - Year 2016, Vol 70, Issue 7
Abstract
Pressure-sensitive adhesives (PSAs) are non-metallic materials used to bond other materials, mainly on their surfaces through adhesion and cohesion. Adhesion and cohesion are phenomena, which may be described thermodynamically and chemically, but actually they cannot be measured precisely. It was shown that the most important bonding processes are bonding by adhesion and bonding with pressure- -sensitive adhesives. The difference between pressure-sensitive adhesives and other adhesives, such as contact adhesives, is in the permanent surface stickiness of the pressure-sensitive adhesives before, or after, the application. The fastest developing polymers departments are: initiating UV photopolymerization and photocrosslinking. Ultraviolet radiation (UV) part of the electromagnetic radiation having a wavelength of 100 to 400 nm, the practical use has an area of 200 to 400 nm. UV radiation does not cause visual impressions results in a strongly fluorescence, photoelectric, photochemical reactions and has a high biological activity. It is particularly important industrial use of UV crosslinking which is used in the manufacture of a wide range of self-adhesives, such as assembly lines, labels, decorative films, protective films, patches and biomedical electrode. Especially important critical point during UV-curing is the balance between adhesion and cohesion of the crosslinked pressure-sensitive adhesive layer. An important element is finding the appropriate beneficial relationship between tack, adhesion and cohesion of the crosslinked pressure-sensitive adhesives that offer assurance to their respective industrial applications. Ultraviolet radiation crosslinking is carried out at room temperature and does not require high temperatures, an important disadvantage pressure-sensitive adhesives crosslinked by heat. Compared to systems crosslinked thermally, the use of UV crosslinking process provides greater speed and effective a crosslinking process, and also does not damage the materials with low thermal resistance.
Authors and Affiliations
Jagoda Kowalska, Zbigniew Czech
Keywords
Related Articles
- EP ID EP585050
- DOI -
- Views 153
- Downloads 0
Metody syntezy 2,2'-bipirolidyny
Vicinal diamine derivatives form an interesting and significant class of organic compounds. They play an essential role as chelating agents and also as ligands for asymmetric synthesis. They are used in synthesis of biol...
Areny jako proleki
Nowadays, improvement of physicochemical, biopharmaceutical and pharmacokinetic properties of pharmacologically active compounds is connected with development of prodrugs. Prodrugs are defined as pharmaceutical compounds...
Alditole i anhydroalditole
Alditols belong to the group of acyclic polyols. Formally, they are obtained from the aldose or ketose by reduction of the carbonyl group. Single or double dehydratation of alditols provides the cyclic compounds named an...
Katalizowane cynkiem asymetryczne hydrosililowanie ketonów i imin
One of the fundamental research goals in modern chemistry is the development of efficient and selective procedures to access organic compounds. Among all of the methodologies developed so far, catalysis offers an efficie...
Synteza γ-laktonów z podstawnikami aromatycznymi
Biological activities of lactones are predominantly determined by different substituents on a lactone ring. γ-Lactones with aromatic substituents have interesting biological activities and serve as useful intermediates i...