Hexanetriol trithioglycolate

Hexanetriol trithioglycolate (HTTHG). 1,2,6-Hexanetriol (18 gm) and mercaptoacetic acid (37.5 gm) were added to 50 ml of xylene and heated to 150 0 for 4.5 hours. Water formed during the reaction was azeotroped with xylene. Vacuum was applied at 160 C and 10 torr pressure for 1 hour to distill off excess reagents. The product was repeatedly washed with distilled water. Thirty-five ml of the product was isolated. 

The effect of hexanetriol trithioglycolate on the durability of the Versamid 140 cured system is presented in Figure 3. Treatment of the steel surface with this coupling agent results in a considerable increase in water durability. A previous study of B-diketone coupling agents perfonaed in our laboratory... 

Figure 8.15 Effect on the durability of epoxy/carbon steel joints of a pretreatment based upon preactivation of the substrate with aqueous ammonium citrate followed by application of hexanetriol trithioglycolate as a primer [71].

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