As with other classes of thermoset polymer materials, blending different grades of epoxy resin, as well as use of additives, plasticizers or fillers is common to achieve the desired processing or final properties, or to reduce cost. Use of blending, additives and fillers is often referred to as formulating.

Sukanto, Heru; Raharjo, Wijang Wisnu; Ariawan, Dody; Triyono, Joko; Kaavesina, Mujtahid (2021-01-01). "Epoxy resins thermosetting for mechanical engineering". Open Engineering. 11 (1): 797–814. Bibcode: 2021OEng...11...78S. doi: 10.1515/eng-2021-0078. ISSN 2391-5439. S2CID 235799133. Flexible plastic is usually used to make common household items such as shoes and bags. The best adhesive for flexible plastic should form a flexible bond with the plastic, dry clear, and waterproof. Compatible Materials: Plastic, acrylic, vinyl, PVC, ABS, PBT, PS, PA, PC, PM, MA, nylon, rubber, metal, and wood Epoxy coatings are often used in industrial and automotive applications since they are more heat resistant than latex-based and alkyd-based paints. Epoxy paints tend to deteriorate, known as "chalking out", due to UV exposure. [40] Epoxy coatings have also been used in drinking water applications. [41]

Rodríguez-Uicab, Omar; Abot, Jandro L.; Avilés, Francis (January 2020). "Electrical Resistance Sensing of Epoxy Curing Using an Embedded Carbon Nanotube Yarn". Sensors. 20 (11): 3230. Bibcode: 2020Senso..20.3230R. doi: 10.3390/s20113230. ISSN 1424-8220. PMC 7309011. PMID 32517164.

You also get the putty epoxy adhesives, which require you to knead the two components together before application. Many of the epoxy putty products can be used as an adhesive but also as a filler. Removing the excess epoxy putty can be done by using a sharp blade. Epoxies have been modified in a variety of ways, including reacting with fatty acids derived from oils to yield epoxy esters, which were cured the same way as alkyds. Typical ones were L8 (80% linseed) and D4 (40% dehydrated castor oil). These were often reacted with styrene to make styrenated epoxy esters, used as primers. Curing with phenolics to make drum linings, curing esters with amine resins and pre-curing epoxies with amino resins to make resistant top coats. Organic chains maybe used to hydrophobically modify epoxy resins and change their properties. The effect of chain length of the modifiers has been studied. [45] Adhesives [ edit ] Special epoxy is strong enough to withstand the forces between a surfboard fin and the fin mount. This epoxy is waterproof and capable of curing underwater. The blue-coloured epoxy on the left is still undergoing curing The best glue for plastic to buy in 2023 1. Loctite Super Glue Gel: Best plastic glue for spill-free precision Epoxy resin may be reacted with itself in the presence of an anionic catalyst (a Lewis base such as tertiary amines or imidazoles) or a cationic catalyst (a Lewis acid such as a boron trifluoride complex) to form a cured network. This process is known as catalytic homopolymerisation. The resulting network contains only ether bridges, and exhibits high thermal and chemical resistance, but is brittle and often requires elevated temperature for the curing process, so finds only niche applications industrially.You see, for different types of plastics, different glues are more effective at creating a solid, lasting bond. You just need to know which combinations work best… which is why we’re here!

Hakiki, F., Nuraeni, N., Salam, D.D., Aditya, W., Akbari, A., Mazrad, Z.A.I. and Siregar, S. Preliminary Study on Epoxy-Based Polymer for Water Shut-Off Application. Paper IPA15-SE-025. Proceeding of The 39th IPA Conference and Exhibition, Jakarta, Indonesia, May 2015. Higher molecular weight diglycidyl ethers (n ≥ 1) are formed by the reaction of the bisphenol A diglycidyl ether formed with further bisphenol A, this is called prepolymerization:Hardeners which show only low or limited reactivity at ambient temperature, but which react with epoxy resins at elevated temperature are referred to as latent hardeners. When using latent hardeners, the epoxy resin and hardener may be mixed and stored for some time prior to use, which is advantageous for many industrial processes. Very latent hardeners enable one-component (1K) products to be produced, whereby the resin and hardener are supplied pre-mixed to the end user and only require heat to initiate curing. One-component products generally have shorter shelf-lives than standard 2-component systems, and products may require cooled storage and transport. Sinha, Animesh; Islam Khan, Nazrul; Das, Subhankar; Zhang, Jiawei; Halder, Sudipta (2017-12-18). "Effect of reactive and non-reactive diluents on thermal and mechanical properties of epoxy resin". High Performance Polymers. 30 (10): 1159–1168. doi: 10.1177/0954008317743307. ISSN 0954-0083. S2CID 104235230. Brominated bisphenol A is used when flame retardant properties are required, such as in some electrical applications (e.g. printed circuit boards). The tetrabrominated bisphenol A (TBBPA, 2,2-bis(3,5-dibromophenyl)propane) or its diglycidyl ether, 2,2-bis[3,5-dibromo-4-(2,3-epoxypropoxy)phenyl]propane, can be added to the epoxy formulation. The formulation may then be reacted in the same way as pure bisphenol A. Some (non-crosslinked) epoxy resins with very high molar mass are added to engineering thermoplastics, again to achieve flame retardant properties. Polyfunctional primary amines form an important class of epoxy hardeners. Primary amines undergo an addition reaction with the epoxide group to form a hydroxyl group and a secondary amine. The secondary amine can further react with an epoxide to form a tertiary amine and an additional hydroxyl group. Kinetic studies have shown the reactivity of the primary amine to be approximately double that of the secondary amine. Use of a difunctional or polyfunctional amine forms a three-dimensional cross-linked network.