anhydride maleic anhydride tetramethylene maleic anhydride dodecenylsuccinic anhydride pyromellitic dianhydride hexachloroendomethylene tetrahydrophthalic anhydride trimellitic anhydride and mixtures thereof the polymercaptan resin component is supplied by liquid polymeric materials having an average sh functionality of greater than 2 5 preferably for enhancing the autogenous cure at ambient temperature such resin has sh functionality of about 3 or more for example 6 or more although typically such is below about 6 for economy also such resins have hydroxyl functionality for cure enhancement this hydroxyl functionality is preferably on the carbons that are in the position alpha to the carbon atoms bearing the sh functionality further the polymers preferably have 2 or more hydroxyl groups per molecule e g 2 5 such groups per molecule exemplary polymercaptan resins have been shown for example in u s pat nos 3 361 723 as well as 3 472 913 moreover as has been described in some detail in the last mentioned u s patent exemplary polymercaptan resins can also be prepared in accordance with the teachings of u s pat nos 3 258 495 and 3 278 496 and ostensibly under certain steps disclosed in u s pat no 2 581 464 as will be seen from a review of this exemplary u s patent art the.