AbstractThe preparation of polyester resins using Bisacid A2 as the modifying acid in systems containing maleic unsaturation is briefly described. The detailed compositions of the various resins, the yields, final acid values, and capillary melting ranges are tabulated. The preparation of resin solutions in reactive monomers (principally styrene) and the viscosities of the resulting liquid resins at various monomer contents are given. The casting of unfilled standard sheet for subsequent testing is described. The range of Barcol hardnesses of the cast cured sheets is reported.
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