Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1995-06-26
1997-06-24
Mullis, Jeffrey C.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528229, 528314, 528315, 528322, 5283291, 528335, 5283393, 528342, 524800, C08G 6900
Patent
active
056418558
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to water-soluble condensation products of amino-containing compounds and at least bifunctional crosslinkers, to processes for preparing them by reacting amino-containing compounds with monoethylenically unsaturated carboxylic acids and derivatives thereof and at least bifunctional cross-linkers to form water-soluble condensation products, and to the use of the condensation products as drainage, flocculation and retention aids in papermaking.
U.S. Pat. No. 4,144,123 discloses a process for preparing nitrogen-containing condensation products by grafting polyamidoamines with ethyleneimine and reacting the products thus obtainable with .alpha.,.omega.-bis(chlorohydrin) ethers of polyalkylene oxides at from 20.degree. to 100.degree. C. to form high molecular weight, still Just water-soluble resins which--measured at 20.degree. C. in a 20% strength by weight aqueous solution--have a viscosity of more than 300 mPas. The condensation products thus obtainable are used as retention, flocculation and drainage aids in papermaking.
U.S. Pat. No. 4,066,494 discloses the use of nitrogen-containing condensation products based on polyalkylene-polyamines as drainage accelerants and retention aids in the paper industry. The nitrogen-containing condensation products are prepared by reacting polyalkylenepolyamines comprising from 15 to 500 alkyleneimine units with .alpha.,.omega.-chlorohydrin ethers of polyethylene oxides comprising from 18 to 90 ethylene oxide units at from 20.degree. to 100.degree. C. to form high molecular weight, still water-soluble resins.
DE-C-2 916 356 discloses a process for preparing water-soluble polyetheramines by condensing di- or higher amines having from 2 to 10 nitrogen atoms with chloro-hydrin ethers formed from 1 mol of dihydric alcohol having from 2 to 5 carbon atoms, ethoxylation products thereof containing up to 18 ethylene oxide units, glycerol or polyglycerol containing up to 15 glycerol units and at least 2-8 mol of epichlorohydrin in polar, water miscible solvents in the absence or substantial absence of water at from 110.degree. to 200.degree. C. and then adding an alkali metal or alkaline earth metal base in such an amount to neutralize at least 20% of the hydrogen chloride formed in the course of the condensation. This is followed by a postcondensation. The condensation products are used as flocculation, retention and drainage aids in papermaking.
Of the above-described condensation products, in particular the substances disclosed in U.S. Pat. No. 4,144,123 have proved useful as retention and drainage aids in the art of papermaking. However, all the condensation products mentioned above are ineffective in papermaking from an acid pH in the presence of relatively large amounts of alum.
It is an object of the present invention to provide novel compounds. It is a further object to provide a papermaking aid which is more effective in the acid pH range than the known compounds.
We have found that these objects are achieved by water-soluble condensation products of amino-containing compounds and at least bifunctional crosslinkers, obtainable by reacting
(a) polyalkylenepolyamines, polyamidoamines, ethylene-imine-grafted polyamidoamines, polyetheramines and mixtures thereof, with
(b) monoethylenically unsaturated carboxylic acids, salts, esters, amides or nitriles of monoethylenically unsaturated carboxylic acids, chlorocarboxylic acids and/or glycidyl compounds of the formula ##STR1##
where
X is --NH.sub.2, --OMe or --OR,
Me is H, Na, K or ammonium, and
R is C.sub.1 -C.sub.4 -alkyl or C.sub.2 -C.sub.4 -hydroxyalkyl, and
(c) at least bifunctional crosslinkers having a halo-hydrin, glycidyl, aziridine or isocyanate unit or a halogen atom as functional group, 100 mPas in a 20% strength by weight aqueous solution at 20.degree. C.
We have also found a process for preparing water-soluble condensation products of the above-described kind by reacting the compounds (a) with the compounds (b) and then reacting the products with the compounds (c) to form water-soluble co
REFERENCES:
patent: 4066494 (1978-01-01), Scharf et al.
Linhart Friedrich
Moench Dietmar
Reuther Wolfgang
Scherr Guenter
Weiser Juergen
BASF - Aktiengesellschaft
Hampton-Hightower P.
Mullis Jeffrey C.
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