Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1996-04-10
1998-01-20
Szekely, Peter A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524317, 524375, 524376, 524377, 524558, 524310, 428404, 428407, C08L 5300, C08L 3314, C08K 5101, B32B 516
Patent
active
057102074
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention related to the use of block polymers containing ethylene glycol ether units esterified with optionally polymeric hydroxycarboxylic acids as foam regulators in aqueous systems that would tend to foam without this addition, to pourable and free-flowing, particulate foam inhibiting formulations in which the foam regulators are adsorbed onto water-soluble or water-dispersible support material and to processes for the production of the foam regulators and the particulate foam inhibiting formulations.
2. Discussion of Related Art
Terephehalic acid polyethylene glycol esters and their use as a soil-dissolving component in detergents are known from European patent EP 185 427. European patent application EP 429 307 describes water-soluble block copolymers which are synthesized from carboxylic acid and polyalkylene oxide monomers and which are at least partly biodegradable. According to EP 429 307, the block copolymers in question are used as detergent builders or incrustation inhibitors. Polyesters of dibasic or polybasic carboxylic acids and polyhydric alcohols and also nonionic surfactants are known from European patent application EP 442 1091, according to which these compounds are used as discoloration-inhibiting and soil-removing additives in detergents.
Ester/ether block copolymers derived from diols and complex monohydroxymonocarboxylic acids are known from European patent EP 000 424. The complex monohydroxymonocarboxylic acids are the esterification product of one or more monohydroxymonocarboxylic acids with a monocarboxylic acid free from hydroxyl groups. Ethylene glycol, propylene glycol and butylene glycol are used as diols. The ester/ether block copolymers are said to be used as surface-active substances, as cutting oils or as hydraulic oils. The foam-regulating property of these or structurally similar compounds is neither recognized nor mentioned.
DE-OS 24 30 342 describes intermolecular esterification products of hydroxyalkane acids which are reacted with a carboxylic acid free from hydroxyl groups and an olefin oxide. The compounds in question are said to be used as textile lubricants, antistatic agents and dispersion aids for the dispersion of oils in water. The use of these or structurally similar compounds as foam regulators is not mentioned.
Acidic polyglycol esters of dicarboxylic acids and their production are described in U.S. Pat. No. 2,950,310. These substances have emulsion-breaking properties in water-in-oil emulsions and may be used in petroleum refining.
Defoamers based on carboxylic acid derivatives, for example esters and amides of citric acid, tartaric acid, succinic acid, maleic acid and ethylenediamine tetraacetic acid, are known from International patent application WO 92/11074. These defoamers may be used either directly or in the form of an emulsion in water either in the manufacture of paper or in the coating of paper.
The foam-inhibiting effect of carbonic acid esters of certain etherified alcohols is known from International patent application WO 92/11073. These substances are said to be used as defoamers in the food industry and in fermentation processes. DE-AS 12 42 569 describes the use of alkyl or alkoxyalkyl carbonates containing 4 to 22 carbon atoms per alkyl or alkoxyalkyl group as foam suppressors. However, the investigations on which the DE-AS is based involved branched-chain alcohols of which the biodegradability has recently been found to be in need of improvement.
Considerable significance is attributed to the control and prevention of foaming in the industrial manufacture or processing of foods. For example, in the industrial processing of sugar-containing plant juices, as is carried out on a large scale in the production of sugar from beet, particular difficulties are caused by excessive foaming in the production and purification of the juice and in the evaporators. The foam control formulations to be used in the sugar industry must of course be physiologically safe. The same also applies to f
REFERENCES:
patent: 3405085 (1968-10-01), Girgeb et al.
patent: 4132694 (1979-01-01), Heyden et al.
Condensed Chemical Dictionary, Seventh Edition, Arthur and Elizabeth Rose, Reinhold Publishing Co. N.Y. pp. 820.
Macromolecules, vol. 26, No. 18, 30 Aug. 1993, Washington, US, pp.4845-4853, XP000389712; E.J. Tijsma, L. van der Does, A. Bantjes, N.K. de Vries, I. Vulic, G.H. Werumeus Buning, `Poly(ether ester)s from Pivalolactone, Alkanediols and Dimethyl Terephthalate. 1. Synthesis, Structure Analysis, and Reaction Mechanism`.
De Haut Christian
Eicken Ulrich
Fischer Herbert
Gorzinski Manfred
Gress Wolfgang
Henkel Kommanditgesellschaft auf Aktien
Jaeschke Wayne C.
Szekely Peter A.
Trzaska Steven J.
Wood John Daniel
LandOfFree
Block polymers containing ester groups as defoamers for aqueous does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Block polymers containing ester groups as defoamers for aqueous , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Block polymers containing ester groups as defoamers for aqueous will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-725905