01075nam a2200121Ia 4500008004100000100002300041245016000064260004500224300001200269520062500281700002400906700002300930220216s9999    xx            000 0 und d  aSoutif Jean-Claude 0aSecond step modifications of epoxidised polymers. 5. Systems allowing release of naphtyhlacetic acid from epoxidised polyisoprene and liquid natural rubber  bJournal of Natural Rubber Researchc1993  a243-252  aA polymeric support containing free or linked naphthylacetic acid (NAA) a stimulator for the production of latex by Hevea can be obtained from epoxidised synthetic 1,4-polyisoprene or liquid natural rubber (LNR). Crosslinking of emulsified epoxidized polymers containing free or bound NAA by diacids or anhydrides catalysed by the tetrabutylammonium salt of the corresponding diacids leads to polymeric particles containing free NAA. Hydrolysis of NAA derivatives of epoxidised 1,4-polyisoprene and epoxidised LNR has been performed in basic media. This particular formulation leads to a high initial rate of liberation.  aBrosseBJean-Claude  aKlimituksa Pairote