Isopropenyl ester sized paper and method for producing same

Paper making and fiber liberation – Processes and products – Multi-layer waterlaid webs or sheets

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162132, 162135, 162136, 162158, 427395, 428453, 428537, D21F 1100

Patent

active

041521986

ABSTRACT:
Paper and paperboard made of felted cellulose fibers are chemically modified by applying to them an isopropenyl ester containing a catalytic amount of an acid catalyst and then heat curing the treated product. The process imparts water repellancy to the paper products with a very low degree of add-on, but with a very high degree of retention of tensile strength. The products also have excellent printability, are resistant to boiling water, and retain their opacity after exposure to water.

REFERENCES:
patent: 2785995 (1957-03-01), Kress
patent: 4067688 (1978-01-01), Payet
Casey "Pulp & Paper", vol. III (1960), pp. 1866, 1867.

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