Patent GB-1536970-A (GB)
Title: Perfluoroalkyl substituted anhydrides and polyacids and their derivatives process for their manufacture and their use
IPC: B05D7/26
Filed: 1976-12-31
Abstract: 1536970 Adhesion-improving additives for polymers CIBA-GEIGY AG 31 Dec 1976 [5 Jan 1976] 54446/76 Heading C3K C3R and C3T [Also in Division C2] The adhesion of polymer compositions, e.g. a formulation of epoxy modified polyethylene oxide melamine-formaldehyde resins, of a crosslinkable polyethylene oxide derived from diepoxides and a cross-linking melamine-formaldehyde resin, of a thermosetting acrylic resin and of a polysulphide resin to a substrate is improved by incorporation of 0À003-20% by weight of a compound (1) wherein Q is a tetravalent radical derived from a tri- or tetracarboxylic acid which contains at least one 1,2-dicarboxy grouping; X is hydrogen or carboxyl; R f  is C 4-18  perfluoroalkyl or C 4-18  perfluoroalkoxy perfluoroalkyl; a is 1 or 2; A is hydrogen or a group (2) with the proviso that A is said group (2) when X is hydrogen, (where m is 0 or an integer of 1 to 5 and Q is the same as Q or is a different radical of the definition given for Q) R<SP>3</SP> is the residue of a R f  substituted, branched or straight chain, aliphatic alcohol of 1 to 2 carbon atoms which contain an olefinic double bond, or 1 to 5 non-terminal oxygen, sulfur and/or nitrogen atoms, the non-chain-forming third bond of any such nitrogen atom(s) independently being attached to hydrogen, an alkyl group of 1 to 6 carbon atoms or a hydroxyalkyl group of 2 to 6 carbon atoms or R<SP>3</SP> is the residue of a R f  substituted branched or straight chain aliphatic diol of 2 to 12 carbon atoms which may contain 1 to 5 non-terminal oxygen, sulfur and/or nitrogen atoms, the non-chain-forming third band of any such nitrogen atom(s) independently being attached to hydrogen, an alkyl group of 1 to 6 carbon atoms or a hydroxyalkyl group of 2 to 6 carbon atoms, applying the resin to the substrate and allowing the composition to cure thereon. In the case of the polysulphide resin; the addition of the compound (1) improves its adhesion to concrete but reduces its adhesion to smooth surfaces, e.g. aluminium and glass. The density of polyurethane foams may be reduced by incorporating into the prepolymer 0À003-20% by weight of a compound of the Formula (1) or a compound obtainable by reacting an Rf-containing anhydride of Formula I according to claim I with a tertiary amine containing compound selected from N,N-dimethylaminoethanol; N,N - dimethyl - propane - 1,3- diamine; N-methyldiethanolamine; N-methyldi - (3 - aminopropyl)amine; 1,4 - bis - (3- aminopropyl)piperazine; N,N - diethylpropane- 1,3 - diamine; N,N - dimethylamino - 1 - propanol; N,N - dimethylamino - 2 - propanol; N,N,N<SP>1</SP> - trimethyl - 1,2 - ethylenediamine; N,N - bis - (2 - hydroxypropyl)aniline; and N- (3 - aminopropyl)morpholine; with one mole of the tertiary amine containing compound being used for each mole of anhydride group in the R f  containing compound. A mould release agent comprises the reaction product of a compound (1) with a molar excess of a siloxane (3) where n is about about 30 or (4) where n is about 6, and R is C 1-6  alkylene.