Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives
Patent
1994-10-17
1999-02-16
Peselev, Elli
Organic compounds -- part of the class 532-570 series
Organic compounds
Carbohydrates or derivatives
536114, 536127, C07H 100
Patent
active
058722467
ABSTRACT:
A process is provided for making alkylated galactomannans comprising reacting a galactomannan in the presence of sodium hydroxide, water, and an alkyl halide to form a reaction mass under pressure and at temperatures greater than 50.degree. C. in amounts and for a time sufficient to achieve a degree of substitution greater than 2.4. Organic volatiles from the reaction mass are stripped and the reaction mass is then washed in water at temperatures high enough to prevent dissolution or agglomeration of the alkylated galactomannan. This washed product is then dried and pulverized to suitable particle size. This product is useful in applications requiring thickening and rheology modification of formulations containing organic solvents or formation of coatings/film from organic solvents. The products are also useful in pharmaceutical applications.
REFERENCES:
patent: 4169945 (1979-10-01), DeGuia et al.
patent: 4547570 (1985-10-01), Garner
Abstracts Bulletin of the Institute of Paper Chemistry, Pishmanova TS. et al., Preparation of Ethylcellulose, vol. 42, No. 6, Dec. 1971, p. 539 and Tseluloza Hartiya 1, Sep./Oct. 1970, No. 5, pp. 19-22.
Review of Current Literature on the Paint and Allied Industries, Sun P. J., Industrial Method for the Production of Ethylcellulose, vol.39, No.289, Jul. 1, 1996, pp. 667-668 and Hua Hsueh Shih Chieh, vol. 18, No. 12, 1964, pp. 552-555.
Commander J. Richard
Majewicz Thomas George
Aqualon Company
Edwards David
Peselev Elli
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