Agents having high nitrogen content and high cationic charge based on dicyanimide dicyandiamide or guanidine and inorganic ammonium salts
OwnerJohn J. Waldmanninventor
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Abstract
The present invention describes polymers having high nitrogen content and high cationic charges derived from dicyanimide, dicyandiamide or guanidine and inorganic ammonium salts. The new compositions are useful in the pulp and paper industries as pitch control agents, as well as adjuvants such as in felt cleaner applications. The new materials are also useful in paper sizing, as retention aids, as antistatic agents, and as coagulants and flocculating agents.
Claims16
A water soluble organic polymer having a high nitrogen content, obtained by reacting:
- (a) 0.05-2.25 mole of monomers selected from the group consisting of dicyandiamide (DCDA), dicyanimide (DCDI), guanidine, guanidine substituted with (C.sub.1-20 alkyl), aryl, or alkaryl, biguanidine, biguanidine substituted with (C.sub.1-20 alkyl), aryl, or alkaryl, guanylurea, guanylthiourea, cyanamide, salts thereof, and mixtures thereof with,
- (b) 0.5-2.0 mole of inorganic ammonium salt comprising ammonium chloride, ammonium bromide, ammonium sulfate and ammonium nitrate, further reacted with
- (c) 0.1-2.0 mole of an amine selected from the group consisting of primary and secondary (C1-C10) alkyl amine, (C2-C6) alkylene diamines and polyalkylene polyamines of the structure ##STR8## wherein y represents an integer of about 1 to 5, each R3 is individually alkylene of 1 to 6 carbon atoms and R4 is selected from the group consisting of hydrogen, hydroxy (C1-C3) alkyl and (C1-C3) alkyl, and optionally in the presence of urea at a temperature ranging from 25.degree. C. to 195.degree. C. in the presence of a high boiling point organic solvent comprising one of diethylene glycol and propylene glycol which is optionally admixed with water.
A water soluble organic polymer having a high nitrogen content, obtained under reflux conditions with stirring, comprising the steps of
- a) heating 0.1-2.0 mole of an amine selected from the group consisting of primary and secondary (C1-C10) alkyl amine, (C2-C6) alkylene diamines and polyalkylene polyamines of the structure ##STR9## wherein y represents an integer of about 1 to 5, each R3 is individually alkylene of 1 to 6 carbon atoms and R4 is selected from the group consisting of hydrogen, hydroxy (C1-C3) alkyl and (C1-C3) alkyl, to 35.degree.-65.degree. C.;
- b) adding gradually to said alkylamine, 0.5-2.0 mole of inorganic ammonium salt comprising ammonium chloride, ammonium bromide, ammonium sulfate and ammonium nitrate;
- c) heating said alkylamine and inorganic ammonium salt to about 100.degree. C.;
- d) adding a glycol solvent comprising one of diethylene glycol and propylene glycol, optionally admixed with water, and heating to obtain a clear solution;
- e) gradually adding to said clear solution obtained in d) 0.05-2.25 mole of monomers selected from the group consisting of dicyandiamide (DCDA), dicyanimide (DCDI), guanidine, guanidine substituted with (C.sub.1-20 alkyl), aryl, or alkaryl, biguanidine, biguanidine substituted with (C.sub.1-20 alkyl), aryl, or alkaryl, guanylurea, guanylthiourea, cyanamide, salts thereof, and mixtures thereof to produce a reaction mixture;
- f) gradually heating said reaction mixture over a period from about 12 to 32 hours to a temperature of 160.degree.-195.degree. C.;
- g) maintaining reaction temperature for about 2 hours;
- h) cooling said reaction mixture to about 100.degree. C.;
- and
- i) adding water to obtain a homogeneous solution.
Dependencies are inferred from the claim text.