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AssigneeHoechst Aktiengesellschaft
InventorsKlaus-Dieter Hammer, Wolfgang Klendauer, Max Bytzek
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This invention relates to a process for the production of a thermoplastic synthetic material of chemically modified protein, which comprises mixing an aqueous alkaline protein solution with an aqueous solution of a tetrafunctional, doubly unsaturated, organic compound of the general formula ##STR1## in which R.sub.1 is hydrogen or an alkyl group with 1 to 18 carbon atoms, R.sub.2 is hydrogen or an alkyl group with 1 to 6 carbon atoms, and R.sub.3 is hydrogen or an alkyl group with 1 to 3 carbon atoms, Subjecting the mixture to a dwell time, causing a precipitating liquid to act upon it, freeing the formed precipitate from excess liquid, and drying. The invention also relates to a shaping material of plastic material of chemically modified protein and a chemical plasticizer. The invention also relates to a plastic material of modified protein.
A process for the production of a thermoplastic synthetic material of chemically modified casein, which comprises mixing an aqueous alkaline casein solution with an aqueous solution of a tetrafunctional, doubly unsaturated, organic compound of the general formula ##STR4## in which R.sub.1 is hydrogen or an alkyl group with 1 to 18 carbon atoms,
A process for the production of a shaping material of plastic material of chemically modified casein and a chemical plasticizer, which comprises mixing an aqueous alkaline casein solution with an aqueous solution of a tetrafunctional, doubly unsaturated, organic compound of the general formula ##STR5## in which R.sub.1 is hydrogen or an alkyl group with 1 to 18 carbon atoms,
A plastic material of modified casein comprising a chemical compound obtained by mixing an aqueous alkaline casein solution and an aqueous solution of a tetrafunctional, doubly unsaturated, organic compound of the general formula ##STR6## in which R.sub.1 is hydrogen or an alkyl group with 1 to 18 carbon atoms,
Dependencies are inferred from the claim text.
No related US applications are recorded in the indexed filing history.
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Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds not provided
Chemical composition of synthetic sausage casings: based on proteins, e.g. collagen
Macromolecular products derived from proteins
Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59: plasticisers
Term ended 30 Aug 1994 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
The present invention relates to a process for the production of thermoplastic synthetic materials of chemically modified protein. The invention further relates to a process for the production of shaping materials composed of plastic material for chemically modified protein and a chemical plasticizer.
The present invention further relates to thermoplastic synthetic materials of chemically modified protein and to shaping materials composed of chemically modified protein and a chemical plasticizer.
This invention further relates to the use of plastic material of chemically modified protein and to the use of the shaping material of chemically modified protein and a chemical plasticizer for the production of shaped articles, particularly films and tubes.
80 g of casein (70.3 g of pure milk protein) are uniformly distributed in 589 ml of water, well swollen and dissolved with 34 ml of concentrated NH.sub.4 OH (25 percent). 29 ml of a 5 percent (2.8 percent, calculated on milk protein) aqueous solution of N-methylol-N,N'-methylene-bisacrylamide are rapidly added with stirring at 20.degree. C. After a dwell time of 2 hours at room temperature, the reaction mixture has a falling-ball viscosity of 110 seconds.
With intense stirring, the liquid is then slowly poured into 700 ml of 15 per cent aqueous sulfuric acid, the modified casein being precipitated as a weakly yellow precipitate. This precipitate is filtered off, thoroughly washed with water, until the filtrate has a neutral reaction, dried, and then finely ground. A paste is then made with the powder and 12 percent by weight of polyglycol 400, calculated on the weight of the plastic material, and moulded into a plate during 30 minutes at 140.degree. C. under a superatmospheric pressure of 70 kg/cm.sup.2. The material forming the plate has a density of 1.31 g/cm.sup.3. The plate can be processed in known manner into a granulate.
In known apparatuses for processing thermoplastic materials, e.g. by means of extruders, calenders or injection moulding machines, the granulate can be converted into shaped articles, e.g. films or hollow bodies.