EP0235380A2
Expired / Lapsed
EP
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Higher functional fluorinated polyisocyanates and varnishes obtained therefrom
Assignee: Syensqo Specialty Polymers Italy SpA
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Filing: 1986-12-12
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Granted: —
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Expires: 2006-12-12
Abstract
Abstract Highly functional fluorinated polyisocyanates of the formula:whereinZ<sub>1</sub> represents the functional group -O-CO-NH-R-NCO;Z<sub>2</sub> represents the difunctional group -O-CO-NH-R-NH-CO-O-;R<sub>f</sub> ist a radical derived from fluoropolyethers having a molecular weight between 500 and 7000;T represents a trivalent or tetravalent radical derived from a polyol;q is zero or 1; ands is 1 or 2.Also, varnishes containing said highly functional fluorinated polyisocyanates of formula (I).
Inventors
- 👤 Franco Federici
- 👤 Giorgio Pin
- 👤 Ennio Cozzi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 08:19
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5003; C08G18/5015; C08G18/08; C08G18/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
91 words
A highly functional fluorinated polyisocyanate of formula: wherein Z 1 represents the functional group -0-CO-NH-R-NCO; Z 2 represents the difunctional group -O-CO-NH-R-NH-CO-O-, R being an alkylene, cycloalkylene, alkylene-cycloalkylene or arylene radical containing from 1 to 20 carbon atoms; R f represents a difunctional radical derived from a fluoropolyether having an average molecular weight between 500 and 7000, and preferably between 1000 and 2500; T represents a trivalent or tetravalent radical derived from a polyol, preferably having a low molecular weight; q is zero or 1; and s is 1 or 2.
Claim 2
Dependent Claim
91 words
A highly functional fluorinated polyisocyanate of formula: wherein Z 1 represents the functional group -0-CO-NH-R-NCO; Z 2 represents the difunctional group -O-CO-NH-R-NH-CO-O-, R being an alkylene, cycloalkylene, alkylene-cycloalkylene or arylene radical containing from 1 to 20 carbon atoms; R f represents a difunctional radical derived from a fluoropolyether having an average molecular weight between 500 and 7000, and preferably between 1000 and 2500; T represents a trivalent or tetravalent radical derived from a polyol, preferably having a low molecular weight; q is zero or 1; and s is 1 or 2.
Claim 3
Dependent Claim
101 words
A fluorinated polyisocyanate according to claim 1, wherein the R f radical is selected from among those having the formula: with R 1 selected from: -(CH 2 ) x -, -(CH20)yCH2-, -(CH 2 ) x OCH 2 -; x, y are integers between 1 and 4; m, n are integers having the ratio m/n between 0.2 and 2, and preferably between 0.5 and 1.2. R' f is a perfluoro alkylene radical; X is F or CF 3 ; and k, j, w, u, d, b, r, c, v, z, a, g are integers which allow to obtain the above-said molecular weights.
Claim 4
Dependent Claim
31 words
A fluorinated polyisocyanate according to one or both of the claims 1-2, wherein T represents a trivalent or tetravalent radical derived from a polyol having a molecular weight lower than 400.
Claim 5
Dependent Claim
27 words
A fluorinated polyisocyanate according to one or both of the claims 1-2, wherein the polyol is selected from trimethylolpropane, trimethylolethane, glycerin, 1,2,6-hexanetriol, and ethoxylated or propoxylated pentaerythritol.
Claim 6
Dependent Claim
33 words
A fluorinated polyisocyanate according to one or more of the claims 1-4 wherein the diisocyanate on which the groups Z 1 and/or Z 2 are based is an aliphatic diisocyanate, e.g. isophorone diisocyanate.
Claim 7
Dependent Claim
28 words
A fluorinated polyisocyanate according to one or more of the claims 1-5, wherein T represents a trivalent radical derived from polyols having a molecular weight lower than 400.
Claim 8
Dependent Claim
29 words
A fluorinated polyisocyanate according to claim 6, wherein the NCO content based on the dry substance is between 1.5 and 8 %, and preferably between 3 and 6 %.
Claim 9
Dependent Claim
21 words
A varnish containing a highly functional fluorinated polyisocyanate of formula (I) as shown in one or more of the claims 1-7.
Claim 10
Dependent Claim
31 words
A varnish according to claim 8, wherein the polyisocyanate is dissolved in a solvent selected from dimethylformamide, a chlorinated solvent and an organic solvent containing in the molecule an ester-ether group.
Claim 11
Dependent Claim
31 words
.0. A varnish according to one or both of the claims 8-9, containing a fluorinated filler up to 50 % by weight e.g. a fluorinated filler chosen from polytetrafluoroethylene and polyfluoroethylenepropylene.
Claim 12
Dependent Claim
48 words
.1. A varnish according to claim 10, having the following characteristics after drying: a contact angle between 100° and 110°; a coefficient of friction between 0.1 and 0.3; an adherence equal to zero; a Sward hardness between 40 and 70; and a salt resistance higher than 1000 hours,
Claim 13
Dependent Claim
87 words
.2. A process for the preparation of a fluorinated polyisocyanate according to one or more of the claims 1-7; comprising: (a) reacting a diisocyanate of the formula: OCN-R-NCO at a temperature between 40° and 100°C with a perfluorinated diol of the formula: HO - Rf - OH wherein R and R f are as defined in claim 1; (b) reacting the thus-obtained reaction product with a polyol or mixture of polyols, preferably having low molecular weight, having functionality 3 or 4, at temperatures between 40° and 100°C.
Claim 14
Dependent Claim
95 words
A process for the preparation of a fluorinated poly- . isocyanate according to one or more of the claims 1-7, which comprises: (i) reacting the entire amount of a polyetherperfluor- inated diol with one portion of diisocyanate, in such a manner as to have a molar ratio diisocyanate/ diol equal to 2/1; (ii) adding to the thus-obtained product the remaining amount of polyol in such a manner that the molar ratio between the polyol and the reaction product is 2/1; and (iii) adding, after the completion of the reaction, the remaining portion of the diisocyanate.
References Cited (Backward Citations)
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