METHOD FOR PRODUCING SELF-RECOVERING POLYMER MATERIALS WITH INCREASED HEAT RESISTANCE, OBTAINED BASED ON THE TANDEM DIELS-ALDER REACTION Russian patent published in 2023 - IPC C08F2/60 C08G73/00 C08K5/3415 

FIELD: polymer materials.

SUBSTANCE: present invention is related to a method for obtaining self-recovering polymeric materials with increased heat resistance, having the general structural formula where fragments R₁ and R₂ are different aliphatic substituents C₂-C₁₈ obtained on the basis of the tandem Diels-Alder reaction from available diamines in a three-stage process. At the first stage, various bismaleimides with an aliphatic substituent C₂-C ₁₈ are obtained. The synthesis of bismaleimides is carried out by a reaction between aliphatic symmetrical diamines and an excess of maleic anhydride in acetic acid. At the second stage, tetrafurfuryl derivatives with an aliphatic substituent C₂-C₁₈ are obtained. The preparation of tetrafurfuryl derivatives is carried out using a reductive amination reaction. In the third stage, a polymerization reaction is carried out between the bismaleimide and tetrafurfuryl derivatives obtained, respectively, in the first and second stages. The increased heat resistance of the considered polymeric materials is due to the fact that the maximum rate of the reverse Diels-Alder reaction for tandem adducts is observed in the range of 200-250°C according to differential scanning calorimetry (DSC), and degradation of the considered polymeric materials at these temperatures does not occur according to thermogravimetric analysis (TGA).

EFFECT: obtaining self-recovering polymeric materials with increased heat resistance, having the above general structural formula, based on the tandem Diels-Alder reaction.

1 cl, 4 dwg, 2 ex