Abstract: The present invention relates to a method for the manufacture of polyalkoxylated polymers.

Abstract: The present invention relates to a method for the manufacture of polyalkoxylated polymers.

Abstract: This invention provides for a composition particularly useful in a method comprising applying the composition to a surface to be lubricated, said composition comprising: at least one polymer (P) comprising a partially or fully fluorinated, straight or branched, polyoxyalkylene chain (Rf) having two chain ends, wherein one or both chain end(s) bear(s) a hydroxy-, alkoxy- or acyl-oxy-terminated polyoxyalkylene chain free from fluorine atoms (Ra), said chain comprising from 4 to 50 fluorine-free oxyalkylene units, said units being the same or different from one another and being selected from —CH2CH2O— and —CH2CH(O)O—, wherein J is independently straight or branched alkyl or aryl, preferably methyl, ethyl or phenyl and water.

Abstract: A process for transferring heat comprising the following steps: (1) transferring heat from a body to a first heat transfer system by means of a secondary loop passageway comprising a heat transfer fluid and, optionally, (2) transferring heat from a second heat transfer system to said body by means of said secondary loop passageway comprising said heat transfer fluid, wherein: said second heat transfer system being the same as or different from said first heat transfer system, said secondary loop passageway comprises at least one polymer sealant selected from a rubber seal and a plastic pipe; and said heat transfer fluid comprises one or more linear perfluoropolyethers having formula RF—(OCF2)n(OCF2CF2)m(OCF2(CF2)zCF2)p—ORF (I), wherein RF, equal or different at each occurrence, is a C1-C3 perfluoroalkyl group, m, n and p, equal to or different from each other, are integers comprised between 0 and 100, the sum m+n being higher than 0, and z is equal to 1 or 2, and wherein said heat transfer fluid is circulat

Abstract: A convenient process for the manufacture of alkoxylated derivatives of PFPE alcohols is herein provided. The process envisages the use of a boron-based catalyst and an iodine source and is characterized in that a PFPE alkoxide is prepared separately, contacted with a boric acid triester of the same PFPE alcohol and finally submitted to alkoxylation in the presence of an iodine source. The process allows achieving an alkoxylation degree of at least 2 with high yields and under conditions that are convenient on an industrial scale.

Abstract: A convenient process for the manufacture of alkoxylated derivatives of PFPE alcohols is herein provided. The process envisages the use of a boron-based catalyst and an iodine source and is characterised in that a PFPE alkoxide is prepared separately, contacted with a boric acid triester of the same PFPE alcohol and finally submitted to alkoxylation in the presence of an iodine source. The process allows achieving an alkoxylation degree of at least 2 with high yields and under conditions that are convenient on an industrial scale.

Abstract: A process for transferring heat from a heat source to a heat sink, comprising using as heat transfer medium a composition comprising: at least one fluorinated fluid free from functional groups (fluid (H)); at least one functional (per)fluoropolyether (functional PFPE(1)) comprising recurring units (R1), said recurring units comprising at least one ether linkage in the main chain and at least one fluorine atom (fluoropolyoxyalkylene chain), and at least one functional end group chosen between —COOH and —CONH2; at least one functional (per)fluoropolyether (functional PFPE(2)) comprising recurring units (R1) as defined above and at least one functional end group chosen between —COCF3 and its hydroxylated derivative —C(OH)2CF3.

Abstract: A process for transferring heat comprising the following steps: (1) transferring heat from a body to a first heat transfer system by means of a secondary loop passageway comprising a heat transfer fluid and, optionally, (2) transferring heat from a second heat transfer system to said body by means of said secondary loop passageway comprising said heat transfer fluid, wherein: said second heat transfer system being the same as or different from said first heat transfer system, said secondary loop passageway comprises at least one polymer sealant selected from a rubber seal and a plastic pipe; and said heat transfer fluid comprises one or more linear perfluoropolyethers having formula RF—(OCF2)n(OCF2CF2)m(OCF2(CF2)zCF2)p—ORF (I), wherein RF, equal or different at each occurrence, is a C1-C3 perfluoroalkyl group, m, n and p, equal to or different from each other, are integers comprised between 0 and 100, the sum m+n being higher than 0, and z is equal to 1 or 2, and wherein said heat transfer fluid is circulat

Abstract: A process for transferring heat from a heat source to a heat sink, comprising using as heat transfer medium a composition comprising: at least one fluorinated fluid free from functional groups (fluid (H)); at least one functional (per)fluoropolyether (functional PFPE(1)) comprising recurring units (R1), said recurring units comprising at least one ether linkage in the main chain and at least one fluorine atom (fluoropolyoxyalkylene chain), and at least one functional end group chosen between —COOH and —CONH2; at least one functional (per)fluoropolyether (functional PFPE(2)) comprising recurring units (R1) as defined above and at least one functional end group chosen between —COCF3 and its hydroxylated derivative —C(OH)2CF3.

Abstract: The invention pertains to a heat transfer composition comprising: at least one fluorinated ether fluid free from functional groups (fluid (H)); from 0.01 to 5% wt with respect to fluid (H) of at least one solid nano-sized additive chosen among metal, metal oxide or carbonaceous material particles, having an average particle size of less than 2 000 nm (additive (N)); and from 0.1 to 10% wt with respect to fluid (H) of at least one functional (per)fluoropolyether comprising recurring units (R1), said recurring units comprising at least one ether linkage in the main chain and at least one fluorine atom (fluoropolyoxyalkene chain) and comprising at least one functional group (functional PFPE (F)).

Abstract: A process for preparing perfluoropolyoxyalkylenes having —OCF2H, —OCF2CF2H and —OCF(CF3)H end groups and a number average molecular weight from 120 to 3,000, by decarboxylation of the corresponding perfluoropolyoxyalkylenes having —OCF2COOH, —OCF2CF2COOH, —OCF(CF3)COOH end groups, in the presence of catalytic amounts of salts formed by perfluoropolyoxyalkylenes having end groups selected from —OCF2COOZ, —OCF2CF2COOZ and —OCF(CF3)COOZ, wherein Z is a monovalent cation of the group Ia or Ib or Z is —NR4+ wherein R is hydrogen or a C1-C4 alkyl, using ratios between Z and the —COOH equivalents of the perfluoropolyoxyalkylenes to be decarboxylated from 0.01 to 0.08, at a temperature between 120° C. and 180° C., in the presence of water, at pH <5 and at a pressure comprised between 2 and 80 atmospheres.

Abstract: A process for preparing perfluoropolyoxyalkylenes having —OCF2H, —OCF2CF2H and —OCF(CF3)H end groups and a number average molecular weight from 120 to 3,000, by decarboxylation of the corresponding perfluoropolyoxyalkylenes having —OCF2COOH, —OCF2CF2COOH, —OCF(CF3)COOH end groups, in the presence of catalytic amounts of salts formed by perfluoropolyoxyalkylenes having end groups selected from —OCF2COOZ, —OCF2CF2COOZ and —OCF(CF3)COOZ, wherein Z is a monovalent cation of the group Ia or Ib or Z is —NR4+ wherein R is hydrogen or a C1-C4 alkyl, using ratios between Z and the —COOH equivalents of the perfluoropolyoxyalkylenes to be decarboxylated from 0.01 to 0.08, at a temperature between 120° C. and 180° C., in the presence of water, at pH <5 and at a pressure comprised between 2 and 80 atmospheres.

Abstract: Use of solvents capable of removing oily substances without solubilizing them, consisting of hydrofluoropolyethers having the general formulaHF.sub.2 CO(CF.sub.2 O).sub.n (CF.sub.2 CF.sub.2 O).sub.m CF.sub.2 Hwherein n and m are integers comprised between 0 and 20, excluding when m and n are contemporaneously 0, and having boiling point from 30.degree. to 200.degree. C. and having a molar ratio 0/C comprised between 0.5-1.

Abstract: A process for preparing hydrogen-terminated polyoxyperfluoroalkanes having molecular weight lower than 1800, by decarboxylation of the corresponding polyoxyperfluoroalkanes having one or two end groups selected form --OCF.sub.2 COOZ, --OCF.sub.2 CF.sub.2 COOZ and --OCF(CF.sub.3)COOZ, wherein Z is an alkaline metal or ammonium, carried out in the presence of water at temperatures from 140.degree.-170.degree. C. and under a pressure of at least 4 atmospheres.

Abstract: Extinguishing compositions comprising a liquid extinguishing agent constituted by hydrofluoropolyethers having general formulaHF.sub.2 CO(CF.sub.2 O).sub.n (CF.sub.2 CF.sub.2 O).sub.m CF.sub.2 Hwherein n and m are integers comprised between 0 and 20, excluding when m and m are contemporaneously 0 and having boiling point between 30.degree. and 200.degree. C. and having an O/C molar ratio between 0.5-1.

Abstract: Use of solvents capable of removing oily substances without solubilizing them, consisting of hydrofluoropolyethers having the general formulaHF.sub.2 CO (CF.sub.2 O).sub.n (CF.sub.2 CF.sub.2 O).sub.m CF.sub.2 Hwherein n and m are integers comprised between 0 and 20, excluding when m and n are contemporaneously 0, and having boiling point from 30.degree. to 200.degree. C. and having a molar ratio 0/C comprised between 0.5-1.

Abstract: Cross-linked macromolecular products having the structure of perfluoropolyethers in which the cross-linking is due to C--C links between carbon atoms of different perfluoropolyether chains, said cross-linked products being obtained by treatment by means of U.V. radiations of the corresponding perfluoropolyethers containing at least three groups: ##STR1## arranged along the chain and at one or at both ends; the C--C link of cross-linking coming from the removal of two groups: ##STR2## of different perfluoropolyether chains.