Amphoteric starches and process for their preparation

Details Amphoteric starches and process for their preparation Amphoteric starches and process for their preparation

1987-05-18

1989-10-24

Kight, John

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

536 50, 536107, 536102, C08B 3102, C08B 3302, C08B 3502

Patent

active

048763365

ABSTRACT:
Improved amphoteric starch derivatives containing tertiary amino or quaternary ammonium groups and anionic phosphate groups are disclosed. The derivatives which are defined by a minimum bound phosphorus content, a minimum viscosity and other criteria have use as wet-end additives and provide improved drainage properties in the manufacture of paper.

REFERENCES:
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patent: 3459632 (1969-08-01), Caldwell et al.
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patent: 4166173 (1979-08-01), Wurzburg et al.
patent: 4216310 (1980-08-01), Wurzburg et al.
patent: 4566910 (1986-09-01), Hubbard et al.
patent: 4579944 (1986-04-01), Harvey et al.
K. W. Britt, TAPPI Journ., Jan. 1984, pp. 102-103, "Water Removal During Paper Sheet Formation".
A. M. Springer et al., TAPPI Journ., Feb. 1984, pp. 104-108, "The Influence of Starch on Drainage and Retention in Paperboard Mill Systems".

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