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    Wyświetlanie 1-4 z 4
    Tytuł:
    Sieciowanie samoprzylepnych klejów silikonowych
    Crosslinking of silicone pressure-sensitive adhesives
    Autorzy:
    Antosik, A. K.
    Czech, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/172358.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    kleje samoprzylepne
    polimery
    silikonowe kleje samoprzylepne
    pressure-sensitive adhesives
    polimer
    silicone pressure sensitive adhesives
    Opis:
    Pressure-sensitive adhesives (PSAs) represent a system that actually dates back to the invention of the self-adhesive articles in 1935 when R. Stanton Avery produced the first coating unit using a wooden cigar box with two holes cut in the bottom. PSAs can be defined as a special category of adhesive which in dry form are permanently tacky at room temperature [1–4]. Since 1960s, silicone pressure-sensitive adhesives have found many uses. They are used in industrial plants, as tapes for joining materials with low surface energy, as well as in the sectors of electrical and electronic, medical care, health care and automotive industry. For about 10 years there has been great interest in new uses for the silicone PSA, particularly for medical and industrial belts. The above examples describe a growing range of potential commercial applications of silicone pressure- -sensitive adhesives. Silicone pressure-sensitive adhesives typically consist of large segments of the silane-functional silicone polymers and silicone resins (MQ). It is well known that silicone pressure-sensitive adhesives because of their unique properties are special-purpose products. The combination of the properties of silicones such as high flexibility of connections Si-O-Si, low intermolecular interaction, low surface tension, excellent thermal stability and transparency for UV radiation, excellent electrical properties, high chemical resistance and weather resistance makes silicone adhesives have improved properties compared to other typical polymeric organic adhesives. Due to the low surface tension of silicone adhesives, adhesive is easily spread on the surface of various materials [4–9]. The properties of silicone pressure sensitive adhesives (Si-PSA) crosslinking thermally by organic peroxides (according to a radical mechanism) depend on the type and concentration of crosslinker used. Benzoyl peroxide (BPO) and 2,4-dichlorobenzoyl peroxide (DClBPO) are the most commonly used peroxides the industry. Increasing the content of BPO or DClBPO in a predominantly affects significantly increase the cohesion, while reducing the adhesion of tested adhesives [1, 5, 6]. With the market testing of pressure sensitive adhesives and literature studies clearly show that there were no studies to date on the process of UV-curing silicone pressure sensitive adhesives; and there is no sales sided adhesive tapes, silicone crosslinked by UV radiation.
    Źródło:
    Wiadomości Chemiczne; 2016, 70, 1-2; 25-32
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ napełniaczy krzemowych na właściwości samoprzylepnych klejów silikonowych
    Influence of silicone fillers on silicone pressure-sensitive adhesives properties
    Autorzy:
    Antosik, A. K.
    Czech, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/172170.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    kleje samoprzylepne
    kaolin
    montmorylonit
    silikonowe kleje samoprzylepne
    pressure-sensitive adhesives
    montmorilonite
    silicone pressure-sensitive adhesives
    Opis:
    Pressure-sensitive adhesives (PSAs) represent a system that actually dates back to the invention of the self-adhesive articles in 1935 when R. Stanton Avery produced the first coating unit using a wooden cigar box with two holes cut in the bottom. PSAs can be defined as a special category of adhesive which in dry form are permanently tacky at room temperature [2, 6–8]. Since 1960s, silicone pressure-sensitive adhesives have found many uses. They are used in industrial plants, as tapes for joining materials with low surface energy, as well as in the sectors of electrical and electronic, medical care, health care and automotive industry. For about 10 years there has been great interest in new uses for the silicone PSA, particularly for medical and industrial belts. The above examples describe a growing range of potential commercial applications of silicone pressure-sensitive adhesives [2, 7, 9–11]. In contrast to the pressure-sensitive adhesives organic silicone pressure-sensitive adhesives show much better performance by this well known it happened that are used to obtain self-adhesive materials for special purposes. Si-PSA usually consist of large segments of the silanol-functional silicone polymers, and silicone resins. Polymeric chains comprising the silicone resins include methyl and phenyl groups thus are very little reactive chemicals. In order to obtain the best adhesion-cohesion balance are used crosslinked thermally in a temperature range of 120–150°C by using organic peroxides. Peroxides most commonly used in industry benzoyl peroxide (BPO) and 2,4-dichlorobenzoyl peroxide (DClBPO). Silicone pressure- -sensitive adhesives are characterized by high flexibility of connections Si-O-Si, low impact intermolecular, low surface tension, excellent thermal stability and transparency for UV radiation, excellent electrical properties, high chemical resistance and weather resistance [2, 6, 7, 14]. In the available literature the montmorillonite and kaolin modified silicone pressure-sensitive adhesives which exhibited increased thermal resistance are reported. The thermal properties of adhesives compositions are better to compared with “pure” silicon composition without any filler [6, 12–14].
    Źródło:
    Wiadomości Chemiczne; 2016, 70, 11-12; 761-769
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Przewodzące samoprzylepne kleje akrylanowe z napełniaczami węglowymi
    Conductive acrylic pressure-sensitive adhesives with carbon filler
    Autorzy:
    Antosik, A. K.
    Czech, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/172375.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    kleje samoprzylepne
    przewodzące kleje samoprzylepne
    polimery
    samoprzylepne kleje akrylanowe
    adhesives
    conductive pressure-sensitive adhesives
    polymer
    acrylic pressure-sensitive adhesives
    Opis:
    Pressure-sensitive adhesives (PSA) are a group of adhesive-based macromolecular polymers which are characterized by good (satisfying the requirements of industrial) adhesion and cohesion; high temperature stability during use, excellent aging resistance and constant tear strength. In 1935, the concept of self-adhesive glue, wherein the obtained self-adhesive product of the invention R. Stanton Avery, was firstly developed. From many types of adhesives, the most common adhesives are acrylics pressure-sensitive adhesives [1–3]. In most cases, self-adhesive adhesives do not exhibit good conductive properties, whereas conductivity grades are classified in the group of insulators. In order to improve their conductive properties, studies have been conducted on the modification of polymers in adhesive compositions, where at least one of the components exhibited conductive properties (e.g. polymers with conjugated π-bonded polymers along polymeric chains). However, the best effects were obtained by adding conductive fillers such as metal (copper, aluminum), specially modified soot, nanotubes or graphene, carbon fibers, metallized glass and conductive fibers. This allowed the creation of electrically conductive compositions characterizing by conductivity in the range from 10–2 to 102 S/cm. This relatively high conductivity is the result of the percolation of conductive filler molecules into an insulating matrix or tunneling between electrically conductive molecules [10, 11]. Acrylate pressure-sensitive adhesives with conductive fillers have found a number of important industrial applications, especially in the electronics industry. Pressure- sensitive adhesives, such as self-adhesive tapes or adhesive films, are used as heating elements, sensors or conductive gums. Due to their good performance, they can be used to connect solar panels or glue small components in the microelectronics industry. They also can be used to discharge static charges from the surface – used as flexible drainage connections – especially in places where the spark is undesirable and can be dangerous. They are used as heating elements [10, 12, 27].
    Źródło:
    Wiadomości Chemiczne; 2017, 71, 11-12; 887-896
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Jednostronnie klejące taśmy na bazie samoprzylepnych klejów silikonowych – dobór najlepszej kompozycji
    One side self-adhesives tapes based on silicone pressure-sensitive adhesives – selections of the best compositions
    Autorzy:
    Antosik, A. K.
    Bednarczyk, P.
    Czech, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/141950.pdf
    Data publikacji:
    2015
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
    Tematy:
    taśmy samoprzylepne
    silikony
    kleje samoprzylepne
    self-adhesives tape
    silicone
    pressure-sensitive adhesives
    Opis:
    Silikonowe kleje samoprzylepne składają się zazwyczaj z dużych segmentów silano-funkcyjnych polimerów silikonowych oraz żywic silikonowych (MQ). Powszechnie wiadomo, że silikonowe kleje samoprzylepne, ze względu na swoje unikalne właściwości, są produktami specjalnego zastosowania. Kombinacja właściwości silikonów, takich jak wysoka elastyczność połączeń Si–O–Si, niewielkie oddziaływanie międzycząsteczkowe, niskie napięcie powierzchniowe, doskonała stabilność termiczna oraz transparentność dla promieniowania UV, doskonałe właściwości elektryczne, duża odporność chemiczna oraz odporność na warunki atmosferyczne sprawia, że kleje silikonowe posiadają lepsze właściwości w porównaniu do innych typowych polimerowych klejów organicznych. W pracy przedstawiono dobór najlepszych kompozycji klejów silikonowych do otrzymywania jednostronnie klejących taśm samoprzylepnych.
    Silicone pressure-sensitive adhesives are usually comprised of high-molecular-weight silanol-functional silicone polymers and siloxane resins (MQ). It is well known that silicone adhesives are products of special use. Combination of the unique properties of silicones, such as high Si–O–Si backbone flexibility, low intermolecular interactions, low surface tension, excellent thermal stability and high UV transparency, often explains why silicone PSAs have superior performance at high- and low-temperature extremes, excellent electrical properties, chemical resistance and outstanding weathering resistance it makes they are superior compared to organic PSAs. The paper presents a selection of the best compositions of silicone adhesives for one-side pressure sensitive adhesive tapes.
    Źródło:
    Chemik; 2015, 69, 12; 862-867
    0009-2886
    Pojawia się w:
    Chemik
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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