Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1993-04-14
1994-12-06
Hoke, Veronica P.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
162158, 1621646, 162199, 162272, 162276, 162275, 524 98, 524105, 524800, C08K 534, D21H 2116, D21H 2304
Patent
active
053711262
ABSTRACT:
Aqueous compositions and process aids useful in paper processing for quenching optical brighteners, particularly under alkaline paper production conditions. The process aids are aqueous compositions comprising (a) an acid addition salt or quartenization product of a cyclic amidine, (b) a polyethyleneimine and optionally (c) an acid. The aqueous compositions and process aids may be added to paper feedstocks in paper production apparatus or to paper production apparatus absent a paper feedstock.
REFERENCES:
patent: 2914427 (1959-11-01), Valko et al.
patent: 3259572 (1966-07-01), Dickson et al.
patent: 3617440 (1971-11-01), Strother
patent: 3639642 (1972-02-01), Matter et al.
Hoke Veronica P.
Honor Robert S.
Parfomak Andrew N.
Sandoz Ltd.
Vila Richard E.
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