Chlorendic Acid (HET Acid)

Chlorendic acid is industrially produced by Diels-Alder reaction. It is a versatile intermediate for many polymers; owing to its hight chlorene content of 54.4%, Chlorendic acid can impart polymers with excellent flame retardant, anti-crossive, and resistance to moisture, alchohol, alkaline and acid.
It will form covalent bonds in polymer matrix when it is added as curing agent or flame retardant, so the resulting products have good stability, no leaching and environment friendly.

Physical and Chemical Properties

1. Product and Name: Chlorendic Acid
2. Chemical Name:
    4,5,6,7,8,8-Hexachloro-3a,4,7,7a-tetrahydro-4,7-methanoisobenzofuran-1,3-dione
    1,4,5,6,7,7-Hexachloro-endo-5-norbornene-2,3-dicarboxylic anhydride
    Hexachloro-endo-methylene tetrahydrophthalic anhydride
3. Synonym: Hetron Acid, Hetron 92
4. CAS No.:115-28-6
5. Structure:

Applications:
Curing agent for epoxy resin and other coating system, especially for PCB applications;
Intermediate for synthesis of unsaturated flame-retardant polyester resin and plasticizers;
Composites, fiberglass-reinforced resins for chemical industry equipment(chemical resistance);
to produce alkyd resins used in special inks and paints.
react with nonhalogenated glycols to form halogenated polyols used as flame retardants in polyurethane foams;
used for production of dibutyl chlorendate and dimethyl chlorendate, which are used as reactive flame retardants in plastics.
used as an additive in acrylonitrile butadiene styrene copolymer.
Esters and amine salts of chlorendic acid are used as extreme pressure additives in synthetic lubricants;
to produce chlorinated cyclodiene insecticides(eg. endosulfan, chlordane, heptachlor, aldrin, dieldrin,endrin, and isodrin).