Solvay Specialty Polymers Italy S.p.a.

Ausimont S.p.a.

Solvay Solexis S.p.a.

Ausimont S.r.l.

Ausimot Spa

Gianfranco Spataro

Giuseppe Marchionni

Pier Antonio Guarda

Ezio Strepparola

Mario Visca

Mattia Bassi

Rossella Silvani

Gabriella Carignano

Padmanabhan Srinivasan

Vincent Pierre Meunier

Francesca Farina

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

Method for manufacturing polyalkoxylated polymers

A process for transferring heat comprising the following steps:

Method for transferring heat

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.

Process for the alkoxylation of (per) fluoropolyether alcohols

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 &#x2014;COOH and &#x2014;CONH; 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 &#x2014;COCFand its hydroxylated derivative &#x2014;C(OH)CF.

A process for preparing perfluoropolyoxyalkylenes having &#x2014;OCFH, &#x2014;OCFCFH and &#x2014;OCF(CF)H end groups and a number average molecular weight from 120 to 3,000, by decarboxylation of the corresponding perfluoropolyoxyalkylenes having &#x2014;OCFCOOH, &#x2014;OCFCFCOOH, &#x2014;OCF(CF)COOH end groups, in the presence of catalytic amounts of salts formed by perfluoropolyoxyalkylenes having end groups selected from &#x2014;OCFCOOZ, &#x2014;OCFCFCOOZ and &#x2014;OCF(CF)COOZ, wherein Z is a monovalent cation of the group Ia or Ib or Z is &#x2014;NRwherein R is hydrogen or a C-Calkyl, using ratios between Z and the &#x2014;COOH equivalents of the perfluoropolyoxyalkylenes to be decarboxylated from 0.01 to 0.08, at a temperature between 120&#xb0; C. and 180&#xb0; C., in the presence of water, at pH &#x3c;5 and at a pressure comprised between 2 and 80 atmospheres.

Process for preparing perfluoropolyoxyalkylenes with -OCF2H, -OCF2CF2H and -OCF(CF3)H end groups

Use of solvents capable of removing oily substances without solubilizing them, consisting of hydrofluoropolyethers having the general formula

Solvent cleaning agents including additives of the formula R.sub.f

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.

Process for preparing hydrogen-terminated polyoxyperfluoroalkanes

Extinguishing compositions comprising a liquid extinguishing agent constituted by hydrofluoropolyethers having general formula

Flame extinguishing compositions

Method of removing oily substances with hydrogen-terminated

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.

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Lissone, Italy

Gianfranco Spataro