Process for the preparation of polymers having recurring agents

Details Process for the preparation of polymers having recurring agents Process for the preparation of polymers having recurring agents

1996-11-12

2000-04-25

Truong, Duc

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528336, 528363, 528492, 528503, C08G 6926

Patent

active

060545534

ABSTRACT:
Polymers having recurring succinyl units are obtained by an improved process by reaction of A, an unsaturated C.sub.4 -dicarboxylic acid or a derivative thereof, with B, a nitrogen-donating compound, in a first reaction step to give a reaction mixture comprising at least one low molecular weight reaction product, and subsequent continuous feeding of the reaction mixture into a continuously operated reactor to give the polymer in a second reaction step. In a further embodiment the invention refers to polymers having recurring succinyl units prepared by reaction of an unsaturated C.sub.4 -dicarboxylic acid or a derivative thereof with a nitrogen-donating compound in a first reaction step and subsequent feeding of the reaction mixture, without intermediate isolation, into an optionally continuously operated reactor, with removal of water, and treatment of the reaction mixture at a temperature of 140 to 350.degree. C.

REFERENCES:
patent: 4590260 (1986-05-01), Harada et al.
patent: 4696981 (1987-09-01), Harada et al.
patent: 4839461 (1989-06-01), Boehmke
patent: 5288783 (1994-02-01), Wood
patent: 5459234 (1995-10-01), Bortnick et al.
patent: 5530091 (1996-06-01), Wagner et al.
patent: 5610255 (1997-03-01), Groth et al.
Orbit Abstract of DE 43 05 368 (Aug. 25, 1994).
Orbit Abstract of EP 0 612 784 (Aug. 31, 1994).
Orbit Abstract of EP 0 693 516 (Jan. 24, 1996).

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