US 5,175,285 A · Polymers derived from polysuccinimide, used as surface coatings for medicinals and foods

Abstract

A conversion product of polysuccinimide useful as coating material for medicinal preparations and foodstuffs having the structure: ##STR1## wherein A is hydrogen or a straight or branched alkyl or alkylene group of 1 to 8 carbon atoms, optionally substituted by cycloaliphatic or aromatic groups, wherein the cyclic substituent can also contain heteroatoms, or by R--O--, ##STR2## or R.sub.3 R.sub.4 N groups, wherein R, R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are hydrogen or branched alkyl or cycloalkyl groups each of which may contain oxygen and nitrogen atoms in the chain or in the ring of 1 to 10 carbon atoms; B is hydrogen or straight or branched chain alkyl or alkenyl, and is the same or different from A; D is hydrogen, NH.sub.4, ##STR3## wherein A and B have the aforementioned meanings, or an alkali metal ion; and a is 0.2 to 1 and b is 0.8 to 0.

Claims6

Dependent claims

A polymer useful as coating material for medicinal preparations and foodstuffs prepared from a polysuccinimide having the structure:

##STR16## wherein the radical ##STR17## in the polysuccinimide is derived from ammonia or an amine selected from the group consisting of methylamine, butylamine, hexylamine, ethanolamine, neopentanolamine, 3-isononyloxypropylamine, 3-propanolamine, 2-methoxyethylamine, 3-methoxypropylamine, 3-ethoxylpropylamine, tetrahydrofurfurylamine, furfurylamine, benzylamine, 2-methoxybenzylamine, tyramine, ethylhexoxypropylamine, monoisoprpanolamine, diethanolamine, diisopropanolamine, 5-amino-1-pentanol, 4-aminocyclohexanol, 2-aminophenylethanol-1, 1-(2-aminoethyl)piperazine, N,N-dimethyl-1,3-propanediamine, 2-aminopyridine, 3-aminopyridine, 4-aminopyridine, N-(3-aminopropyl)pyrrolidone, morpholinoethylamine and glycine ethyl ester;
D is hydrogen, NH.sub.4, ##STR18## wherein radical ##STR19## is as defined above, or an alkali metal ion;
and a is 0.2 to 1 and b is 0.8 to 0.

Dependencies are inferred from the claim text.

Polymers derived from polysuccinimide, used as surface coatings for medicinals and foods

Life of this patent

Polymers derived from polysuccinimide, used as surface coatings for medicinals and foods

Life of this patent

Abstract

Claims6