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Crosslinked copolymers of .alpha.,.beta.-olefinically unsaturated dicarboxylic anhydrides
| Details |
Inventors: Huper, Fritz; Rauenbusch, Erich; Schmidt-Kastner, Gunter; Bomer, Bruno; Bartl, Herbert;
Assignee: Bayer Aktiengesellschaft (Leverkusen, DT)
Primary Examiner: Kight, III; John
Assistant Examiner:
Attorney, Agent or Firm: Depaoli & O'Brien
There are disclosed water-insoluble proteinic preparations in which a protein or polypeptide is bound to a copolymer, which preparations are useful for binding enzymes in order to carry out enzyme-catalyzable reactions. These preparations comprise a peptide material bound to a cross-linked copolymer comprising the following copolymerized units: A. about 0.1 to 50 weight percent of at least one .alpha.,.beta. - monoolefinically unsaturated dicarboxylic acid anhydride having about 4 to 9 carbon atoms; B. about 99.9 to 50 weight percent of at least one di- and/or poly(meth)acrylate of a diol and/or a polyol as hereinafter defined, The copolymer having a bulk volume of 1.4 to 30 ml/g and a specific surface area of about 1 to 500 m.sup.2 /g, and containing, after saponification of the anhydride groups, about 0.02 to 10 milliequivalents of acid per gram. |
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DETAILED DESCRIPTION What is claimed is: 1.
A crosslinked copolymer comprising the following copolymerized units: A.
2.
0 to 20 weight percent of at least one .
alpha.
,.
beta.
-olefinically unsaturated dicarboxylic acid anhydride having 4 to 9 carbon atoms; and B.
80 to 98 weight percent of at least one di- and/or poly(meth)acrylate of a diol and/or polyol.
2.
A copolymer in accordance with claim 1, which contains 0.
01 to 30 weight percent, based on the total monomer units of the copolymer, of a crosslinking agent having at least two non-conjugated double bonds, wherein said crosslinking agent is a different chemical species than monomer (B).
3.
A copolymer in accordance with claim 1 which comprises: A.
2.
0 to 80 weight percent of maleic anhydride, and B.
80 to 98 weight percent of ethylene glycol dimethacrylate or tetraethylene glycol dimethacrylate.
Description:
BACKGROUND OF THE INVENTION 1.
Field of the Invention The invention relates to new water-insoluble protein and polypeptide preparations in which a protein or polypeptide is bound to a copolymer, to a process for the production of these new water-insoluble preparations, and to their use for carrying out enzyme-catalyzed conversions.
2.
Description of the Prior Art The covalent bonding of substances to insoluble polymeric carriers has become more important in recent years.
The binding of catalytically active compounds, for example, enzymes, offers particular advantages since they can, in this form, easily be separated off after completion of the reaction and be repeatedly re-used.
Copolymers of maleic anhydride and vinyl compounds have been repeatedly proposed as carriers with suitable binding groups.
However, copolymers of maleic anhydride with ethylene and monovinyl compounds become more or less water-soluble on reaction with aqueous enzyme solutions so that before or during the reaction an additional cross-linking agent, for example, a diamine, is desirably added.
Enzyme preparations obtained in this way are relatively difficult to filter and possess soluble constituents, and losses of bound enzyme result (compare E
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Molecular Biology 
