Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1978-07-03
1980-09-23
Lieberman, Allan
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
260 292N, 528405, 528407, 528424, 525403, 525523, C08G 6522, C08G 6526
Patent
active
042244218
ABSTRACT:
Water-soluble, crosslinked nitrogen-containing condensation products, the viscosity of which, in aqueous solution, increases with increasing temperature, are obtained by reacting a block copolymer of the formula: ##STR1## x is from 50 to 250, y is from 20 to 100, the ratio of x to y is from 6.5:1 to 1:15, with compounds having at least four basic NH groups in a weight ratio of from 0.8:1 to 30:1. The products are added to aqueous systems, e.g. polymer solutions and polymer dispersions, to improve the viscosity characteristics.
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patent: 3577313 (1971-05-01), Bolger et al.
patent: 3746678 (1973-07-01), Dick et al.
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patent: 3819541 (1974-06-01), Longoria et al.
patent: 3915904 (1975-10-01), Tonkyn et al.
patent: 4128511 (1978-12-01), Streit et al.
Fikentscher Rolf
Gans Karl
Glaser Klaus
Schaefer Emil
Streit Werner
BASF - Aktiengesellschaft
Lieberman Allan
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