CPC C08G 63/553 (2013.01) [C08G 63/199 (2013.01); C08G 63/56 (2013.01); C09J 11/08 (2013.01); C09K 3/10 (2013.01); C09K 2200/0655 (2013.01)] | 16 Claims |
1. An amorphous polyester prepared from a reactive raw material mixture of:
(a) betulin;
(b) dicarboxylic acid; and
(c) at least one compound selected from the group consisting of short-chain polyol, amine, and vegetable oil,
characterized in that the amorphous polyester has a glass transition temperature Tg in the range of −50° C. to 80° C., as determined by means of DSC, and all or part of the reactive raw materials are produced from renewable materials, such that the amorphous polyester includes a proportion of renewable raw materials of 90 to 100 wt. %, based on the total weight of the amorphous polyester.
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9. A method for producing the amorphous polyester according to claim 1, comprising the following steps:
providing a reactive raw material mixture of: the (a) betulin, the (b) dicarboxylic acid, and the (c) at least one compound selected from the group consisting of short-chain polyol, amine, and vegetable oil; and
heating the mixture to a temperature of 200 to 250° C. to form the amorphous polyester.
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11. The method according to claim 9, characterized in that the mixture further contains a catalyst, in an amount of 0.01 to 0.05 wt. %, based on the total weight of the mixture.
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