Copolymers of polyaspartic acid and polycarboxylic acids

Details Copolymers of polyaspartic acid and polycarboxylic acids Copolymers of polyaspartic acid and polycarboxylic acids

1995-04-13

1997-08-19

Acquah, Samuel A.

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

Synthetic resins

From carboxylic acid or derivative thereof

528363, 528367, 525418, 525419, 525420, C08G 6910

Patent

active

056590083

ABSTRACT:
Copolymers of polyaspartic acid which are suitable for the Inhibition of scale deposition were obtained by reacting maleic acid, an additional polycarboxylic acid and ammonia in a stoichiometric excess, at 120.degree.-350.degree. C., preferably 180.degree.-300.degree. C., to provide copolymers of polysuccinimide. In a second embodiment, a polyamine was added to the reaction mix. These intermediate polysuccinimide copolymers could then be converted to the salts of copolymers of polyaspartic acid by hydrolysis with a hydroxide.
Such copolymers are useful in preventing deposition of scale from water and find applications in treating water. Other applications include scale prevention additives for detergents. In addition, such copolymers inhibit dental tartar and plaque formation.

REFERENCES:
patent: 2306918 (1942-12-01), Weiss et al.
patent: 3052655 (1962-09-01), Fox et al.
patent: 3351520 (1967-11-01), Spicer et al.
patent: 3846380 (1974-11-01), Fujimoto et al.
patent: 4169924 (1979-10-01), Barabas et al.
patent: 4363797 (1982-12-01), Jacquet et al.
patent: 4839461 (1989-06-01), Boehmke
patent: 4996292 (1991-02-01), Fox et al.
patent: 5057597 (1991-10-01), Koskan
patent: 5152902 (1992-10-01), Koskan et al.
patent: 5219952 (1993-06-01), Koskan et al.
patent: 5286810 (1994-02-01), Wood
patent: 5296578 (1994-03-01), Koskan et al.
patent: 5328631 (1994-07-01), Du Vosel et al.
patent: 5393868 (1995-02-01), Freeman et al.
patent: 5519110 (1996-05-01), Wood et al.
patent: 5521279 (1996-05-01), Wood et al.

Affiliated with

Also associated with

Rating

Copolymers of polyaspartic acid and polycarboxylic acids does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Copolymers of polyaspartic acid and polycarboxylic acids, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Copolymers of polyaspartic acid and polycarboxylic acids will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1105620