C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
C10M 137/04 (2006.01) C09K 21/12 (2006.01) C10M 127/06 (2006.01)
Patent
CA 2586417
There is disclosed herein novel functional fluids useful as aircraft hydraulic fluids comprising at least about 50% trialkyl phosphate ester and at least one aryl compound whereby the fluid exhibits in combination the fire resistant properties as indicated by a fire point in excess of 177~C, a flash point of at least 160~C and an autoignition temperature of at least 400~C. The trialkyl phosphate esters contain between (6) and (18) carbon atoms and preferably between (12) and (15) carbon atoms. The aryl compounds are most preferably polyphenyls, fused ring aryl compound containing from (5) to (24) carbon atoms in the aryl portion such as biphenyl or terphenyl or alkyl substituted polyphenyls wherein the alkyl groups contain from (1) to (5) carbon atom. Other aryl compounds includes fused ring aryl compounds such as naphthalene, anthracene, diphenyl oxide and the like.
L'invention concerne de nouveaux fluides fonctionnels utilisés comme fluides hydrauliques pour aéronefs comprenant au moins environ 50 % d'ester de phosphate trialkyle et au moins un composé aryle, le fluide présentant en combinaison des propriétés de résistance au feu, comme l'indiquent un point de feu en excès de 177 °C, un point d'éclair d'au moins 160 °C et une température d'auto-inflammation d'au moins 400 °C. Les esters de phosphate trialkyle contiennent entre 6 et 18 atomes de carbone, de préférence entre 12 et 15 atomes de carbone. Les composés aryle sont, de préférence, des polyphényles, un composé d'aryle à cycle fusionné contenant 5 à 24 atomes de carbone dans la partie aryle, par exemple biphényle, terphényle ou polyphényles à substitution alkyle, les groupes alkyle contenant 1 à 5 atomes de carbone. D'autres composés aryle comportent notamment des composés aryle à cycle fusionné, tels que naphtalène, anthracène, oxyde de diphényle et analogues.
Notte Patrick P.b.
Wolfe Terry Calvin
Mcfadden Fincham
Solutia Inc.
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