Paper making and fiber liberation – Processes and products – Non-fiber additive
Patent
1979-03-09
1980-04-15
Nielsen, Earl A.
Paper making and fiber liberation
Processes and products
Non-fiber additive
162168NA, 260 9, 260 174CL, 528405, 525403, 525523, D21H 360
Patent
active
041982690
ABSTRACT:
Properties of fibrous materials, e.g., wet and dry strength of paper, are significantly improved by incorporating a cationic polyether into a fibrous material such as pulp. The polyether bears ammonium salt groups exemplified by the formula: ##STR1## wherein R.sub.1 and R.sub.2 are individually hydrogen, hydrocarbyl such as alkyl, hydroxyhydrocarbyl, or hydrocarbylamino; E is individually ##STR2## or E and R.sub.1 are collectively ##STR3## wherein R is hydrogen or alkyl, R.sub.3 is hydroxyl, halogen, hydrogen or hydrocarbyl, R.sub.4 is hydrogen or hydrocarbyl; and A.sup..crclbar. is an anion of an ammonium salt. Such polyethers also function as retention aids for sizing agents and dyes and as antistatic agents.
REFERENCES:
patent: 3428680 (1969-02-01), Walker et al.
patent: 3625684 (1971-12-01), Poot et al.
patent: 3640766 (1972-02-01), Jursich et al.
patent: 3746678 (1973-07-01), Dick et al.
patent: 3753931 (1973-08-01), Raspanti et al.
patent: 3824158 (1974-07-01), Rosenberg
patent: 3864288 (1975-02-01), Riew et al.
Evani Syamalarao
Killat George R.
Nielsen Earl A.
The Dow Chemical Company
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