Polyester-starch sized paper, sizing composition, and process th

Details Polyester-starch sized paper, sizing composition, and process th Polyester-starch sized paper, sizing composition, and process th

1979-07-30

1981-04-21

Lesmes, George F.

Paper making and fiber liberation

Processes and products

Non-fiber additive

162175, 428481, 428533, 428534, 260 9, D21D 300

Patent

active

042630940

ABSTRACT:
There is disclosed a cellulosic material such as paper or paperboard surface-sized with an aqueous dispersion of a combination of degraded starch or a starch derivative and a branched-chain, water-dispersible polyester condensation product. Said polyester is derived from the reaction of a dicarboxylic reactant, a diol or polyoxyalkylene glycol, and a phosphorus acid reactant wherein said polyester has a carboxylic acid number of about 5 to about 15 and an average molecular weight of about 4,000 to about 11,000. Mixtures of said starch and said polyester when used to surface-size cellulosic materials impart water resistance thereto.

REFERENCES:
patent: 3413139 (1968-11-01), Rasmussen et al.
patent: 3931422 (1976-01-01), Bateman et al.
patent: 3983268 (1976-09-01), Scharf
patent: 4029885 (1977-06-01), Buikema
patent: 4098741 (1978-07-01), Login
patent: 4111816 (1978-09-01), Login

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