CBDO is an important raw material for polyester synthesis. The synthesized polyester material can not only maintain the advantages of copolyester, but also increase the glass transition temperature of the product.

CN111087586A provides a kind of CBDO modified high heat-resistant biodegradable polyester, the patent uses dialkyl terephthalate as rigid component, straight-chain aliphatic dicarboxylic acid or its dialkyl ester or its dibasic Acid anhydride is a degradable modification component, and CBDO is added as a heat-resistant modification component, and a high heat-resistant biodegradable polyester is obtained by a direct esterification method. It contains four parts:

1. A terephthalic acid residue, the residue is derived from dialkyl terephthalate;

2. Linear aliphatic dibasic acid residues with less than 10 carbon atoms, derived from linear aliphatic diol residues from linear aliphatic diols or/and linear aliphatic dicarboxylic acids, linear aliphatic diols One or more of dialkyl esters of carboxylic acids and direct-linked fatty dianhydrides;

3. Residues of straight-chain aliphatic diols with less than 6 carbon atoms, including ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol and 1,6-hexanediol one or more of the diols;

4. CBDO residues;

The polyester has both biodegradability and high heat resistance. Compared with the common degradable polyester, the glass transition temperature (Tg) of the polyester of the present invention is at least 19℃higher than that before modification. The intrinsic viscosity is 0.53 to 1.69 dl/g.

References

CN111087586A A 2,2,4,4-tetramethyl-1,3-cyclobutanediol-modified high heat-resistant biodegradable polyester.