Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives
Patent
1997-08-21
1998-07-21
Kight, John
Organic compounds -- part of the class 532-570 series
Organic compounds
Carbohydrates or derivatives
424405, 424DIG8, 514 25, 514 54, 536120, C07H 1304, C07H 100, A61K 31715, A01N 2500
Patent
active
057836922
DESCRIPTION:
BRIEF SUMMARY
This invention relates to novel alkyl polysaccharide derivatives and compositions comprising said alkyl polysaccharide derivatives and their salts. The alkylpolysaccharide derivatives of the current invention are particularly useful as surfactants and or adjuvants in compositions for use in agrochemical, animal health, personal care industries and the like.
Surfactants and compositions comprising surfactants are well known in general as components of industrial cleaners, agrochemical compositions such as herbicides, acaricides and pesticides and many types of personal care products such as shampoos, hair conditioners and the like.
Many surfactants can be used to form concentrates of active agents which concentrates may be readily emulsifiable into water. The ability of surfactants to emulsify lipophilic components to form aqueous compositions makes them particularly useful.
Many different compounds have been shown to have properties which makes them suitable for use as a surfactant. For example, it is well known in the art to use many surfactants such as alkyl phenol alkoxylates and fatty alcohol alkoxylates (also known as fatty alcohol polyalkyleneglycol ethers) and sulphate and phosphate esters thereof; vegetable oil alkoxylates (such as castor oil alkoxylates); alkyl and alkylaryl sulphonates; alcohol sulphates; sulphosuccinate mono-esters and di-esters; alkylene oxide block copolymers; and end carboxylated alkoxylates (ether carboxylates). Mixed alkoxylate surfactants may also be used, such as in the ethoxylate/propoxylate based surfactants. In recent years personal care products have primarily included surfactants comprising fatty acid glycolic esters, glycol stearates, glycerol stearates, ether sulphates, betaines, alkanolamides, amines and derivatives thereof.
Many of the surfactants of the prior art are not suitable for use in personal care products because they are potential skin sensitisers or irritants. Many factors influence the irritation effect of surfactants and the molecular structure of the surfactant can be closely linked to its effect on adsorption, solubilisation, penetration, swelling, denaturation and general irritation on human skin.
Because of their effect on the living systems in our environment, some surfactants are no longer acceptable for industrial use. Some surfactants of the prior art include toxic trace impurities such as nitrosamines which may have a detrimental effect on plant or human tissue which contact the surfactant. Other surfactants have had their use restricted because of their poor biodegradation properties and potential unfavourable effect on the environment.
In very recent times alkylpolysaccharides have become particularly attractive for use as surfactants because they contain no toxic trace impurities, they are readily biodegradable and because they are derived from renewable resources such as coconut oil and wheat starch. They are particularly favoured for use in personal care products because they demonstrate very little tendency to skin irritation.
It has now been found that novel environmentally acceptable alkyl polysaccharide derivatives can be produced having characteristics which make them particularly suited to use in agrochemical formulations (including animal health products such as drenches, pour-ons and dips), personal care products, fabric softeners and like consumer products.
The current invention therefore provides alkyl polysaccharide derivatives formed by the reaction of succinic anhydrides and alkylpolysaccharides.
The alkyl polysaccharide derivatives of the invention contain a carboxylic acid group which readily forms salts and hence the alkyl polysaccharide derivatives of the invention include the carboxylate salts thereof.
In the context of the present invention and patent specification the term alkenyl succinic anhydride is used to mean the reaction product of an olefin and maleic anhydride. Therefore, it will be evident to those skilled in the art that such reaction products may contain one or more compounds depending on whether the olef
REFERENCES:
patent: 5580553 (1996-12-01), Nakajima
Kirby Andrew Francis
Moody Keith
ICI Australia Operations Proprietary Limited
Kight John
Lee Howard C.
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