Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1995-02-21
1996-06-25
Dodson, Shelley A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
525419, 525420, 525432, 525539, 525540, 528363, 528367, C08G 6910
Patent
active
055300910
ABSTRACT:
Molten maleic anhydride is introduced in the form of fine droplets at 53.degree. C. to 250.degree. C. and preferably at 60.degree. C. to 120.degree. C. into a gas atmosphere which consists either of pure gaseous ammonia or of a gas mixture of ammonia and at least one other gas and of which the temperature is between 20.degree. C. and 500.degree. C. The process is carried out at a temperature of 120.degree. C. to 180.degree. C. for the production of polysuccinimide and at a temperature of 10.degree. C. to 120.degree. C. for the production of maleic amide acid.
REFERENCES:
patent: 2459964 (1949-01-01), Robinson et al.
patent: 5329020 (1994-07-01), Kalota et al.
patent: 5399750 (1995-03-01), Brun et al.
Literature: Patents Abstract of Japan C-991 Oct. 2, 1992 vol. 16/No. 473.
Bamberger Thomas
Gehrmann Dietrich
Giltjes Manfred
Groth Torsten
Joentgen Winfried
Bayer Aktiengesellschaft
Dodson Shelley A.
Gerstenzang William C.
Hampton-Hightower P.
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