Coating compositions for the manufacture of coated papers

Details Coating compositions for the manufacture of coated papers Coating compositions for the manufacture of coated papers

1979-06-19

1983-01-04

Hoffman, James R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524425, 524447, C08L 6124, C08L 302, C08L 906

Patent

active

043671713

ABSTRACT:
A coating composition for paper is provided, which composition consists of an aqueous preparation containing at least a polymeric binder, an inorganic pigment, and a water-insoluble urea-formaldehyde polycondensation product from 1 mole of urea and 1.3 to 2 moles, of formaldehyde, which product is in a highly dispersed form and has a mean particle diameter of 3 to 6 microns, and a specific BET surface urea of 3 to 12 m.sup.2 /g.
Papers coated with these compositions exhibit, in addition to an enhanced degree of whiteness and equally good gloss and improved opacity and smoothness, above all better printability.

REFERENCES:
patent: 3928272 (1975-12-01), Brancato
patent: 3953421 (1976-04-01), Berstein
Renner, Die Makromolekulare Chemie, 149, 1-27, (1971).

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