Crosslinking agent, method of producing same and paper made with

Details Crosslinking agent, method of producing same and paper made with Crosslinking agent, method of producing same and paper made with

1977-01-12

1979-03-27

Ansher, Harold

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428420, 428532, 428535, 428537, 428539, B32B 2904, B32B 2906

Patent

active

041466691

ABSTRACT:
A characteristic feature of the present invention is that the crosslinking agent comprises grains, each grain having a nucleus consisting of a substance inert to the substance forming crosslinks with hydroxyl-containing water-soluble polymers, and an external layer surrounding said nucleus and containing compounds of tetravalent metals selected from the group consisting of titanium, zirconium, hafnium and tin.
The particles for the chemical treatment of hydroxyl-containing water-soluble polymers can be prepared by applying a substance capable of forming crosslinks with the hydroxyl-containing water-soluble polymers on inert, finely dispersed particles and by hydrolytically treating this substance so as to form an external layer of the grain.
This method can be used for making paper having a fibrous base with a coating containing hydroxyl-containing water-soluble polymers treated with a crosslinking agent in the form of grains, each grain having a nucleus consisting of a substance inert to the substance forming crosslinks with said hydroxyl-containing water soluble polymers, and an external layer surrounding said nucleus and containing compounds of tetravalent metals selected from the group consisting of titanium, zirconium, hafnium and tin.

REFERENCES:
patent: 2256853 (1941-09-01), Schwartz
patent: 3425896 (1969-02-01), Hart
patent: 3702779 (1972-11-01), Fadner et al.
patent: 3808038 (1974-04-01), Ueno et al.
patent: 4008116 (1977-02-01), Sebel

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