Patent GB-797526-A (GB)
Title: Improved proteinaceous preparations
IPC: C08L89/00
Filed: 1955-03-18
Abstract: A stable composition comprises a protein and a compound which is not itself a protein and is a polyamide-forming substance, a polyvalent urethane, a urethane substituted on the nitrogen atom by a further organic radical, a carboxylic acid amide substituted on the nitrogen atom by a further organic radical or urea substituted on at least one of the nitrogen atoms by a further organic radical, the said compound, which is from soluble to sparingly soluble in water, having no N-methylol groups and being present in an amount of at most 8 parts by weight to 10 parts of dry protein, and which may also contain a tinctorial agent.  An aqueous preparation comprises 3 to 40 per cent of a from water-swellable to water-soluble protein and from 2 to 30 per cent of a water-soluble polyamide forming substance, the percentages being referred to the total weight of the preparation, said water-soluble polyamide forming substance having no N-methylol groups and being present in an amount of at most 8 parts by weight to 10 parts of dry protein, and may also contain a polyhydric alcohol, and urea or from 0.5 to 20 per cent of formamide, the amount of formamide not exceeding 50 per cent of protein and polyamide-forming substance.  A stable aqueous preparation may be produced by heating an aqueous preparation of the protein- and polyamide-forming substance to a temperature up to 100 DEG  C. and threads, foils and films may be prepared therefrom by evaporation of the water and hardening with protein tanning or precipitating agents, e.g. formaldehyde, chromium or aluminium compounds. Suitable proteins are casein, gelatin, zein, soya bean protein, pea nut protein, hide glue and any other animal or vegetable protein which is soluble or at least swellable in water at room temperature.  Examples of polyamide substances are lactams, e.g. g -butyro-lactam, caprolactam, propionic acid lactam, caprylic acid lactam, amino lactones, butanediol urethanes, amino carboxylic acids and their hydroxy compounds, salts of amino carboxylic acids, e.g. with diamines or saturated and unsaturated dicarboxylic acids, salts of bifunctional and polyfunctional amines and saturated and unsaturated carboxylic acids, e.g. hexamethylene, propylene, or ethylene diamine with malonic, maleic, adipic, glutaric or succinic acid, polyvalent urethanes or mono and polyfunctional acid amides which are substistituted on the nitrogen atom by a further organic radical so that a hydrogen atom still remains on the nitrogen atom such as methylated acid amides, e.g. methyl formamide, N-substituted acetamide, succinimide or phthalimide or mixtures of two or more thereof. Softeners, e.g. butinediol and other saturated or unsaturated polyhydric alcohols, may also be present.  Alcohols of high boiling point, e.g octodecyl alcohol, or saponified castor oil and organic or inorganic pigments, e.g. carbon black, iron oxide red, phthalocyanine blue, may be incorporated into the aqueous preparation to yield a stable pigment paste or powder which may be diluted with water or mixed with plastic dispersions, e.g. polyacrylic or polyvinyl compounds, natural or synthetic rubbers, and hardening agents, e.g. formaldehyde, to form lacquers, varnishes, print pastes, pigment finishes for leather, impregnating agents for natural and synthetic fibrous materials, e.g. leather, wood and paper, and materials for making pressed articles, films and fibres.ALSO:A stable composition comprises a protein and a compound which is not itself a protein and is a polyamide-forming substance, a polyvalent urethane, a urethane substituted on the nitrogen atom by a further organic radical, a carboxylic acid amide substituted on the nitrogen atom by a further organic radical or urea substituted on at least one of the nitrogen atoms by a further organic radical, the said compound, which is from soluble to sparingly soluble in water, having no N-methylol groups and being present in an amount of at most 8 parts by weight to 10 parts of dry protein, and which may also contain a tinctorial agent.  An aqueous preparation comprises 3 to 40 per cent of a from water-swellable to water-soluble protein and from 2 to 30 per cent of a water-soluble polyamide forming substance, the percentages being referred to the total weight of the preparation, said water soluble polyamide forming substance having no N-methylol groups and being present in an amount of at most 8 parts by weight to 10 parts of dry protein and may also contain a polyhydric alcohol, and urea or from 0.5 to 20 per cent of formamide, the amount of formamide not exceeding 50 per cent of protein and polyamide forming substance.  A stable aqueous preparation may be produced by heating an aqueous preparation of the protein and polyamide forming substance to a temperature up to 100 DEG  C. and threads, foils and films may be prepared therefrom by evaporation of the water and hardening with protein tanning or precipitating agents, e.g. formaldehyde, chromium or aluminium compounds.  Suitable proteins are casein, gelatin, zein, soya bean protein, pea-nut protein, hide glue and any other animal or vegetable protein which is soluble or at least swellable in water at room temperature.  Examples of polyamide substances are lactams, e.g. g -butyro-lactam, caprolactum, propionic acid lactam, caprylic acid lactam, amino lactones, butanediol urethanes amino carboxylic acids and their hydroxy compounds, salts of amino carboxylic acids, e.g. with diamines or saturated and unsaturated dicarboxylic acids, salts of bifunctional and polyfunctional amines and saturated and unsaturated carboxylic acids, e.g. hexamethylene, propylene, or ethylene diamine with malonic, maleic, adipic glutaric, or succinic acid, polyvalent urethanes or mono- and polyfunctional acid amides which are substituted on the nitrogen atom by a further organic radical so that a hydrogen atom still remains on the nitrogen atom such as methylated acid amides, e.g. methyl formamide N-substituted acetamide, succinimide or phthalimide or mixtures of two or more thereof.  Softeners, e.g. butinediol and other saturated or unsaturated polyhydric alcohols, may also be present.  Alcohols of high boiling point, e.g. octodecyl alcohol, or saponified castor oil and organic or inorganic pigments, e.g. carbon black, iron oxide red, phthalocyanine blue, may be incorporated into the aqueous preparation to yield a stable pigment paste or powder which may be diluted with water or mixed with plastic dispersions, e.g. polyacrylic or polyvinyl compounds, natural or synthetic rubbers, and hardening agents, e.g. formaldehyde, to form lacquers, varnishes, print pastes, pigment finishes for leather, impregnating agents for natural and synthetic fibrous materials, e.g. leather, wood and paper, and materials for making pressed articles, films and fibres.