1. Preparation
To achieve the final stage of a fully cured polyester, several steps are necessary:
unsaturated polyester is produced by esterification-condensation of diols or epoxides;
this polyester is then diluted with a monomer, such as styrene, to produce an unsaturated polyester resin;
the final use of the resin is polymerization to form a three-dimensional network (cross-linking). The resin, pure or formulated with added fillers or fibers, is polymerized catalytically, thermally or by irradiation. This operation, performed in situ on a surface, in a mold or in a special machine, produces the desired object, part or coating.
1.1 Condensation by esterification
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Preparation
Properties
Statistical and economic data
The polyester resins market
-
Global demand in 2002 was in the region of 1.63 million tonnes, of which :
420 kt in the United States ;
520 kt in Europe ;
230 kt in Japan ;
460 kt in Asia Pacific.
References
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French and European standards http://www.afnor.fr
Standards NF EN ISO
- Plastics – Unsaturated polyester resins – Conventional determination of reactivity at 80 degrees Celsius. Classification number: T51-175 - NF EN ISO 584 - 09-98
- General test methods for pigments and fillers – Part 5: Determination of oil absorption. Classification number: T31-222 - NF EN ISO 787-5 - 10-95
- Plastics –...
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