Extended polylactone diol compositions
Abstract
Abstract This invention relates to improved block copolycarbonates containing an amorphous, soft, rubbery segment or block composed of lactone units and other crystalline, hard, thermoplastic segment or block composed of dihydric phenol carbonate units. The present invention also relates to novel liquid compositions formed by extending an appropriate polylactone diol with an extending agent selected from the group consisting of dihydric phenols, aliphatic diols, dicarboxylic acids and hydroxy monocarboxylic acids. The aforementioned extended diols are particularly useful in the production of the block copolycarbonates of this invention. This invention also contemplates a novel method for reducing the extent of annealing time normally required for the primary crystallization of a block copolycarbonate of this invention comprising including in the block copolycarbonate composition, prior to primary crystallization, a nucleating agent.
Inventors
- 👤 M Matzner
Bibliographic Details
Claims Analysis
Total Claims: 3References Cited (Backward Citations)
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