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Polyester resins are synthetic resins formed by the reaction of dibasic organic acids and polyhydric alcohols. Maleic anhydride is a commonly used raw material with diacid functionality in unsaturated polyester resins. [1] Unsaturated polyester resins are used in sheet moulding compound, bulk moulding compound and the toner of laser printers.
Viverso is the successor of the resin factory of the Bayer Bitterfeld GmbH. Production started here in 1994. Besides the 3 Viverso product lines, the Bayer MaterialScience brands Bayhydrol and Desmodur are produced here. The facility is equipped with a pilot plant and a laboratory as well as raw material and final product storages.
In the liquid state, unsaturated polyester resins may be processed by numerous methods, including Hand Layup, vacuum bag molding, and spray-up and compression molded Sheet Molding Compound (SMC). They can also be B-staged after application to chopped reinforcement and continuous reinforcement, to form pre-pregs.
Specialty chemicals producer Stepan will acquire an expandable 21,000-ton plant when it takes over the North American polyester resins business from Bayer MaterialScience. The global powder ...
The quantity used for the curing of UP resins is about 1-2%. [ 2 ] A disadvantage, particularly in the production of polymers for applications in the food or cosmetics sector, is the possible formation of benzene as a decomposition product which can diffuse out of the polymer (for example, an LDPE packaging film).
Allnex was established in 2013 after Advent International acquired the Coating Resins Division as a divestiture from Cytec Industries. [2] In September 2016, Allnex and Nuplex Industries , a global manufacturer of resins, were merged to form one company, which has its corporate center in Frankfurt am Main , Germany .
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The contained extractant is supposed to enhance the capacity of the resin particles. A large category of resins, which constitutes 75% of resins used, [citation needed] is that of the unsaturated polyester resins. The production of PVC entails the production of "vinyl chloride resins", which differ in the degree of polymerization. [5]
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