Patent EP0257720A2 successfully refreshed from Google Patents.
EP0257720A2
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EP
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Aircraft de-icing and anti-icing composition
Assignee: Union Carbide Canada Ltd
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Filing: 1987-08-27
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Granted: —
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Expires: 2007-08-27
Abstract
Abstract A composition is described which consists of a microemulsion of oil in a water/glycol solution containing certain thickening agents, emulsifiers, carboxylic acids having from 10 to 18 carbon atoms and alkanolamines to provide the desirable viscosity and shear stability needed to give a composition having effective de-icer and anti-icing properties.
Inventors
- 👤 Frank Ma
- 👤 Daniel Comeau
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 11:22
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
237 words
A de-icer and anti-icing composition comprising a microemulsion having a continuous phase and a discontinuous phase, said continuous phase comprising: a) from 5% to 85% by weight based on the weight of the total composition of a glycol selected from the group consisting of ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, glycerol and mixtures thereof, and b) from 5% to 95% by weight of water based on the weight of the total composition; said discontinuous phase comprising: up to 5.0% by weight based on the total weight of the composition of a water insoluble oil, the oil comprises a carboxylic acid having from 10 to 18 carbon atoms in an amount of from 0.1% to 2.5% by weight based on the weight of the total composition, and the remainder of the composition comprising: c) from 0.05% to 10.0% by weight based on the weight of the total composition of a thickening agent selected from the group consisting of natural and artificial gums, cellulose ethers, carboxymethylcellulose and hydroxyethylcellulose, d) an emulsifier selected from the group consisting of anionic surfactants and non-ionic surfactants and mixtures thereof, said emulsifier being present in an amount of from 0.1 times to 100 times the concentration of the water insoluble oil, and e) from 0.1% to 2.5% by weight of alkanolamines based on the weight of the total composition, said total composition having a pH of from 6 to 10.
Claim 2
Dependent Claim
237 words
A de-icer and anti-icing composition comprising a microemulsion having a continuous phase and a discontinuous phase, said continuous phase comprising: a) from 5% to 85% by weight based on the weight of the total composition of a glycol selected from the group consisting of ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, glycerol and mixtures thereof, and b) from 5% to 95% by weight of water based on the weight of the total composition; said discontinuous phase comprising: up to 5.0% by weight based on the total weight of the composition of a water insoluble oil, the oil comprises a carboxylic acid having from 10 to 18 carbon atoms in an amount of from 0.1% to 2.5% by weight based on the weight of the total composition, and the remainder of the composition comprising: c) from 0.05% to 10.0% by weight based on the weight of the total composition of a thickening agent selected from the group consisting of natural and artificial gums, cellulose ethers, carboxymethylcellulose and hydroxyethylcellulose, d) an emulsifier selected from the group consisting of anionic surfactants and non-ionic surfactants and mixtures thereof, said emulsifier being present in an amount of from 0.1 times to 100 times the concentration of the water insoluble oil, and e) from 0.1% to 2.5% by weight of alkanolamines based on the weight of the total composition, said total composition having a pH of from 6 to 10.
Claim 3
Dependent Claim
103 words
A composition as claimed in claim 1 wherein; (a) the glycol is present in an amount of from 40% to 60% by weight based on the weight of the total composition, (b) said water is present in an amount of from 40% to 50% by weight, said water insoluble oil is present in an amount of from 0.1% to 1.0% by weight, (c) said thickening agent is present in an amount of from 0.1% to 5.0% by weight, and (d) said emulsifier is present in an amount of between 2.0 times to 20.0 times the concentration by weight of said water insoluble oil.
Claim 4
Dependent Claim
15 words
A composition as claimed in claim 2 wherein said water insoluble oil comprises mineral oil.
Claim 5
Dependent Claim
15 words
A composition as claimed in claim 2 or 3 wherein thickening agent comprises xanthan gum.
Claim 6
Dependent Claim
16 words
A composition as claimed in any of the preceeding claims wherein the emulsifier comprises non-ionic surfactant.
Claim 7
Dependent Claim
18 words
A composition as claimed in claim 5 wherein the non-ionic surfactant provides an HLB of 5 to 14.
Claim 8
Dependent Claim
18 words
A composition as claimed in any of the preceeding claims having a pH of from 7 to 9.
Claim 9
Dependent Claim
14 words
A composition as claimed in any of the preceeding claims further comprising a defoamer.
References Cited (Backward Citations)
No citation records indexed.
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