Paper making and fiber liberation – Processes and products – With coating after drying
Patent
1986-06-19
1987-06-02
Ivy, C. Warren
Paper making and fiber liberation
Processes and products
With coating after drying
1621646, 524591, 524839, 524840, C08L 7500, D21H 348
Patent
active
046701001
ABSTRACT:
The present invention relates to aqueous solutions or dispersions of polyisocyanate addition products which contain about 2 to 300 milliequivalents per 100 g of solids of chemically incorporated ternary or quaternary ammonium groups and up to about 25% by weight, based on solids, of chemically incorporated ethylene oxide units, --CH.sub.2 --CH.sub.2 --O--, present within a polyether chain, the ternary or quaternary ammonium groups and the ethylene oxide units being present in an amount sufficient to guarantee the solubility or dispersibility of the polyisocyanate addition products in water, characterized in that the polyisocyanate addition products have segments incorporated in the polymer chain which correspond to the following general formula ##STR1## in an amount of about 0.1 to 20% by weight based on the above formula, but excluding the weight of R.
The present invention also relates to a process for the production of polyisocyanate addition products and to their use as coating agents for flexible or inflexible substrates and as sizing agents for paper or for the production sizing agents for paper.
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Angewandte Chemie 82, vol. 9, 1970, "Polyurethane Ionomers, A New Class of Block Polymers".
Baumgen Heinz
Beck Ulrich
Henning Wolfgang
Konig Joachim
Meckel Walter
Bayer Aktiengesellschaft
Gil Joseph C.
Harsh Gene
Ivy C. Warren
Roy Thomas W.
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