Réaction #302888

Équation de réaction

maleic anhydride

trimethylol propane

→

tetrahydrophthalic anhydride

trimethylol propane

Solvants

water

Conditions de réaction

Traitement

1. 1
   Autreto form
2. 2
   workup.ADDITIONcontaining unsaturated double bonds
3. 3
   AutreA second intermediate reaction product

Mode opératoire

29.4 grams of maleic anhydride and 13.4 grams of trimethylol propane crosslinker are reacted with stirring for 10 hours at 90° C. to form a clear water-soluble first intermediate reaction product containing unsaturated double bonds capable of undergoing free-radical polymerization and hydroxyl and carboxylic acid end groups. A second intermediate reaction product is formed by the reaction of 45.6 grams of tetrahydrophthalic anhydride and 13.4 grams of trimethylol propane under the same reaction condition. The two intermediate reaction products next are dissolved with stirring in 200 grams of water containing 25 grams of triethanol amine crosslinker, and 1.0 gram of cumyl hydroperoxide free radical initiator to form a homogenous solution. The homogenous solution next is coated on a multifilamentary glass roving and is cured as described in Example 1. A free-radical polymerization reaction and a cross-linking reaction take place via an esterification reaction. The resulting cured product is similarly stable and displays a high resistance upon exposure to boiling water that is assisted by the free-radical polymerization of the first intermediate reaction product that is made possible by the inclusion of the free-radical initiator.

Source