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  • Chemical Resins

    A resin formed by a series of polymerization reactions using a compound as a monomer is called a chemical resin. The types of chemical resins are very rich, so the physical and chemical properties of different types of chemical resins are also different. At present, most resins on the market are chemical resins.

    Applications:

    Due to the rich variety of hybrid resins and different physical and chemical properties, they are widely used in coatings, material engineering, environmental protection, pharmaceutical preparations and other fields.

    • Materials engineering: Many chemical resins and their composite materials have been receiving extensive attention in the field of materials research and engineering due to their high temperature resistance. Chemical resins commonly used in the field of material engineering are generally thermosetting resins, including polyimide resins, epoxy resins, cyanate resins, and bismaleimide resins. These resins show different characteristics and are suitable for different temperature ranges. For example, bismaleimide resin is a typical representative of heat-resistant thermosetting resin, which is known for its excellent thermal oxidation resistance, heat resistance, moisture resistance, and excellent dielectric properties. Therefore, the composite material of bismaleimide resin can be used to make wings, fuselages and aero engine blades, and is widely used in the aerospace field.

    Application of bismaleimide resin in engineering field Figure 1. Application of bismaleimide resin in engineering field

    • Coatings: Chemical resins are the most widely used in coatings. Chemical resins prepared from many different monomers can be used as coatings. For example, acrylic resins, epoxy resins, and saturated polyester resins are all representatives of chemical resins that perform well in the field of coatings. Among them, acrylic resin has excellent versatility, rapid development and other excellent properties, so it is widely used in various paint products and can be directly used to prepare automotive paint, interior wall paint, wood paint, etc. Epoxy resins and saturated polyester resin materials have good optical properties and gloss retention, as well as strong adhesion and good mechanical properties, so they are often used to prepare powder coatings. In addition, sometimes in the process of industrial production, a method of blending multiple resins is also used to produce a coating with better performance. For example, UV-curable coating prepared by adding epoxy resin to traditional acrylic resin is an ecologically safe, healthy and environmentally friendly decorative coating. At present, UV-curable coatings are commonly used in automotive beauty, medical machinery maintenance, magazines, and food packaging industries.
    • Other fields: In addition to the above fields, chemical resins also have great application value in the fields of adhesives, environmental protection, pharmaceutical preparations, etc. For example, alkyd resins are a type of chemical resins synthesized from fatty acids or vegetable oils with polyols and polyacids. They have extremely strong tackiness, so they are often used as adhesives. Dicyandiamide formaldehyde resin is the main component of the decolorizing flocculant on the market in recent years. This flocculant can effectively remove polycyclic aromatic hydrocarbons and nitrogen-containing heterocyclic organic pollutants, and is used more frequently in coking wastewater treatment processes. Synthetic methacrylic acid copolymer and methacrylic acid ester copolymer are two acrylic resins with different monomers. These two acrylic resins are non-toxic, non-irritating, not absorbed by the human body, and have various polymer functions. They are widely used in the field of formulations for sustained-release coatings, controlled-release coatings, sustained-release matrix materials, oral targeted release drugs and transdermal administration administration, etc.

    Acrylic resin is used to prepare controlled release coating and sustained release coating Figure 2. Acrylic resin is used to prepare controlled release coating and sustained release coating

    References:

    1. Fan T Y;. (2001). “An investigation of pulsatile release tablets with ethylcellulose and Eudragit L as film coating materials and cross-linked polyvinylpyrrolidone in the core tablets.” J Control Release 77(3), 245.
    2. HOFLAND A.(2012), “Alkyd resins: From down and out to alive and kicking.” Progress in Organic Coatings ..73(4), 274-282
    3. Lin QL. (2013), “Direct preparation of carbon foam by pyrolysis of cyanate ester resin at ambient pressure.” Journal of Analytical and Applied Pyrolysis 104, 714-717.

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