abstract |
Curable polyester oligomers. Reacting together: (a) a diol of formula : (where R and R1 are alkyls with up to 10 C; n is 0 or 1); (b) pentaerythritol or 1,1,1-trimethylolpropane; and (c) an ester-forming cpd. viz. a diaryl carbonate, phosgene, a cyclic or dibasic acid or cyclic di-acid anhydride. Component (a) may be neopentylglycol or trimethylolpropane. |