Montedison S.p.a.

Snia Viscosa S.p.a. Societa Nazionale Industria Applicazioni Viscosa

Snia Viscosa

Ennio Cozzi

Franco Federici

Massimo Tardani

Giorgio Pin

Aldo Trovati

High-functionality compositions based on fluorinated and silanized polyisocyanates, prepared by reacting a hydroxy-terminated perfluoropolyether having an average molecular weight ranging from 500 to 7000 and a silico-carbinol having an average molecular weight ranging from 500 to 7000, with an organic diisocyanate and a polyol having a functionality of at least 3. Varnishes containing said compositions based on fluorinated and silanized polyisocyanates, having a high functionality.

High-functionality compositions based on fluorinated and silanized

Highly functional fluorinated polyisocyanates of the formula: ##STR1## wherein Z.sub.1 represents the functional group --O--CO--NH--R--NCO;

Highly functional fluorinated polyisocyanates and varnishes obtained

Unsaturated polyester resins having an acidity number of 5-90 mg. KOH/g. and a molecular weight of 500-5000 and which are capable of entrapping air or other inert gases so as to form structural foams and contain in the chain 0.1 to 20 mol % of amide and/or amine groups. These groups are preferably derived from the reaction of an organic compound having two reactive groups at least one of which contains nitrogen with the polycarboxylic acid and/or polyvalent alcohol contained in the polyester resin.

Structural foams of unsaturated polyester resins

Unsaturated polyester resins having an acidity number of 5-90 mg. KOH/g. a molecular weight of 500-5000 and which are capable of entrapping air or other inert gases so as to form structural foams and which contain in the chain 0.1 to 20 mol% of amide to the minimum acceptable link section size. Acceptable chain links are therefore excluded from fitting into the opening whereas worn chain links which have been worn to a degree which equals or exceeds the limit of permissible wear slide into the opening thereby indicating that the chain should be removed from service.

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Cantalupo, Italy

Ennio Cozzi