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    Wyświetlanie 1-7 z 7
    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:
    Klasyfikacja klejów samoprzylepnych ze względu na rodzaj polimeru
    Classification of pressure-sensitive adhesives according to basic polymer kind
    Autorzy:
    Antosik, Adrian Krzysztof
    Antosik, Nataniel Adrian
    Licbarski, Adam
    Powiązania:
    https://bibliotekanauki.pl/articles/972304.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    kleje samoprzylepne
    polimery
    adhezja
    kohezja
    pressure-sensitive adhesives
    polymer
    adhesion
    cohesion
    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. They are nonmetallic 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. They can be describe as a special category of adhesive which in dry form are permanently tacky at room temperature and adheres to a substrate under light pressure after what can be removed cleanly, on demand, without leaving residues on the substrate; mechanically - soft, sticky substance [1-7]. One of the most popularly classification of pressure-sensitive adhesives are division according to basic polymer kind. PSA are divided on seven groups in this classifications respectively acrylic, rubber, silicone, polyurethane, polyester, polyether and EVA pressure-sensitive adhesive [5, 7-8]. Market and technology of high-quality pressure-sensitive adhesives is growing very fast. This development is the result of expansion in both existing and new fields of application of pressure-sensitive adhesives. Self-sealing polymers used for production of pressure-sensitive adhesives is directly related to their structure, which makes them unique in the world. The global market for self-adhesive tapes was expanding by 5.5% per year. In 2012 it produced worldwide about 1700.5 kilotons pressure-sensitive adhesives with a value of $ 22.7 trillion. In 2018, an increase in world production was expected to reach around 2208.2 kilotons of self-adhesive adhesives valued at 31.64 billion USD, which has been approximately met, in the following years a further increase in the production of these materials is forecasted [1-3].
    Źródło:
    Wiadomości Chemiczne; 2019, 73, 9-10; 452-463
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fotoreaktwne poliakrylanowe kleje samoprzylepne
    Photoreactive acrylics pressure-sensitive adhesives
    Autorzy:
    Kowalska, J.
    Czech, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/171714.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    kleje samoprzylepne
    kleje fotoreaktywne
    sieciowanie
    pressure-sensitive adhesives
    photoreactive adhesives
    crosslinking
    Opis:
    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.
    Źródło:
    Wiadomości Chemiczne; 2016, 70, 7-8; 541-551
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Podział klejów rozpuszczalnych w wodzie ze względu na pochodzenie
    Classification of water-soluble adhesives according to origin
    Autorzy:
    Mozelewska, K.
    Czech, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/171549.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    kleje samoprzylepne
    kleje naturalne
    kleje syntetyczne
    kleje rozpuszczalne w wodzie
    pressure-sensitive adhesives
    natural adhesives
    synthetic adhesives
    water-soluble adhesives
    Opis:
    Self-adhesive adhesives have been known since 1935. Since then, many categories of their division have been distinguished, depending on their origin, state of aggregation, operating conditions, obtaining, chemical base or binding mechanism, as well as many other properties. The main is their application in natural and synthetic adhesives, that is due to the origin of the high molecular weight compounds used for their production. The following work describes the types of water-soluble natural and synthetic adhesives. In recent centuries, there has been a decline in the use of natural polymers for the synthesis of water-soluble pressure sensitive adhesives. This is due to the spread of cheaper products from petrochemical resources, but also better properties that they characterize. For their polymerization, synthetic monomers which hydrophilic groups (hydroxyl, amide or carboxyl) are used. These groups, in the further reaction stage, after polymerisation, give the possibility of cross-linking of the pressure-sensitive adhesive. Polyacrylate based adhesives are among the most commonly used adhesives. It is forecasted that the demand for such adhesives will increase on average by 2.9% per annum. Dispersive, water-soluble, self-adhesive adhesives and those in which the solvent is water also play an increasingly important role. This happens as a result of legal requirements, but also greater public awareness of ecology.
    Źródło:
    Wiadomości Chemiczne; 2018, 72, 1-2; 29-37
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Klasyfikacja klejów samoprzylepnych ze względu na proces otrzymywania
    Classification of pressure-sensitive adhesives according to manufacturing process
    Autorzy:
    Antosik, K.
    Czech, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/172781.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    klej samoprzylepny
    rozpuszczalnikowy klej samoprzylepny
    bezrozpuszczalnikowy klej samoprzylepny
    wodno-dyspersyjny klej samoprzylepny
    pressure-sensitive adhesive
    solvent-based adhesive
    solvent-free adhesive
    water-borne adhesive
    Opis:
    An adhesive is any substance that, when applied to the surfaces of materials, binds the surfaces together and resists separation. The basic ingredients are adhesive firming agents (binder), solvents, adhesion enhancing agents (plasticizers, coalescing agents), wetting agents, modifiers and stabilizers. There are many criteria for the distribution of adhesives taking into account their characteristics and purpose, of which the basic division is made according to their chemical base and the method of curing [1]. 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]. Pressure-sensitive adhesives require certain properties: besides a good surface adhesion, good stability against light, oxygen, moisture and plasticizers, and the adhesion characteristics is constant over a very wide temperature range. They are characterized by the excellent low constant level of peel strength and tack as well as the excellent aging performance at room or higher temperatures. The inherent tackiness of PSAs allow them to wet and adhere quickly under a low pressure on a broad variety of substrates [3]. There are many criteria for the division of PSA taking into account their characteristics and intended use, where the basic division is made according to their chemical base and a method for curing. In practice, the most commonly used criteria for the allocation of adhesives include: form (consistency), methods and fields of application, rate of binding, joint properties, quantities of ingredients, properties of the thermal adhesive layer or the production process [1]. Pressure-sensitive adhesives according to the manufacturing process can be divided into solvent-based, water-borne and solvent-free PSA (Fig. 2) [14–17]. The most commonly used high molecular compounds used in the manufacture of pressure-sensitive adhesives include natural rubber and synthetic copolymers of ethylene and acrylic acid, polisilicones, acrylics, linear polyesters, polyether, polyurethanes. The market and technology of high-performance PSAs are expanding rapidly. A growing market is the result of expansion in both current and new application areas. Self-adhesive polymers possess inherent properties due to their structure that make them unique [15]. The world market for pressure sensitive adhesives was valued at USD 22.70 billion in 2012 and is expected to reach USD 31.64 billion by 2018. The global pressure sensitive adhesives market volume was 1700.5 kilo tons in 2012 and is expected to reach 2208.2 kilotons by 2018 [18].
    Źródło:
    Wiadomości Chemiczne; 2015, 69, 1-2; 111-119
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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