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    Poly-thiadiazole from di-aldehyde, hydrazine and sulphur - as polymer breakdown promoter, bonding agent and dye intermediate
    5.
    发明专利
    Poly-thiadiazole from di-aldehyde, hydrazine and sulphur - as polymer breakdown promoter, bonding agent and dye intermediate 未知

    公开(公告)号：DE2750202A1

    公开(公告)日：1979-05-17

    申请号：DE2750202

    申请日：1977-11-10

    Applicant: BASF AG

    Inventor： HAGEN HELMUT DIPL ING DR ,  NAARMANN HERBERT DIPL CHEM DR

    IPC: C08G75/32

    Abstract: Polythiadiazoles of formula (I) where R1 is a (cyclo)aliphatic, aromatic or heterocyclic residue, and n = 5-100, are claimed (I) are promoters for polymer breakdown, bonding agents for polymers, and intermediates for dyes. (I) is prepd. by the reaction of a dialdehyde of formula OHC-R1-CHO with hydrazine and S, in molar ratio about 1:1:1, at 10-180 degrees C. If a small excess of dialdehyde is used, the chain endings are satd. by OHC- or -R-CHO gps. Reaction is pref. at 30-150 degrees C. in a solvent and at up to 50 bars pressure. The prods. are colourless to pale yellow polymers with decomposition temp.>150 degrees C. and mol. wt. 1,000-20,000.

    Thermostable aromatic polyamide-imides with thiadiazole gps. - are prepd. from trimellitic acid and aromatic amine and isocyanate
    7.
    发明专利
    Thermostable aromatic polyamide-imides with thiadiazole gps. - are prepd. from trimellitic acid and aromatic amine and isocyanate 未知

    公开(公告)号：DE2556523A1

    公开(公告)日：1977-06-30

    申请号：DE2556523

    申请日：1975-12-16

    Applicant: BASF AG

    Inventor： BLINNE GERD DIPL CHEM DR ,  HAGEN HELMUT DIPL ING DR ,  NAARMANN HERBERT DIPL CHEM DR ,  ROPTE ECKHARD DIPL CHEM DR

    IPC: C08G73/14

    Abstract: New aromatic polyamide-imides (I) with 1,3,4-thiadiazole gps. consist of units of the formula (in which Y has the formula n = 100-10,000. Ar1 is a m- or p-aryl gp. Ar2 is as Ar1 or -Ar3-Y'-Ar4; Ar3 and Ar4 are as Ar1. Y' is Y, S, O, SO2, CO or a direct bond). Fibrides, fibres, films, foams, insulating lacquers, coating compsns. and laminates can be made from (I) solns., according to the mol. wt., and the pptd. (I) can be moulded by hot pressing. (I) have better thermal stability than aromatic olyamides with Y gps. and an ether and/or sulphonic acid gp. and can be produced from solns. usin readily available starting materials. (I) have terminal carboxyl, urea, amido and/or amino gps. (I) are prepd. by reacting trimellitic acid or anhydride (II) with H2N-Ar1-Y-Ar1-NH2 and then with OCN-Ar2-Y'-Ar2-NCO. E.g. a 22% soln. of (I) with a soln. viscosity of 34600 cP at 20 degrees C and intrinsic viscosity of 0.8 dl/g was prepd. from 0.5 mole (II), 0.25 mole H2N-O-Y-O-NH2, 0.25 mole OCN-0-O-0-NCO and 0.003 mole OCN-0-CH2-0-NCO (in which 0 is p-phenylene).

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