Abstract: A method is provided for preparing an organic film on the surface of a solid support including the steps of (a) applying, to the surface, by transfer or by spraying, a solution containing at least one cleavable aryl salt; and (b) subjecting the solution to a UV or visible irradiation, such that irradiation radical entities are formed from the cleavable aryl salt and an organic film is grafted. Further provided is a kit of elements for the implementation of such a method.

Abstract: This invention relates to a method for preparing an organic film at the surface of a solid support, with a step of contacting said surface with a liquid solution including (i) at least one solvent, (ii) at least one adhesion primer, under non-electrochemical conditions, and allowing the formation of radical entities based on the adhesion primer. The liquid solution can also include (iii) at least one monomer different from the adhesion primer and radically polymerizable. This invention also relates to a non-electrically-conductive solid support on which an organic film according to said method is grafted, and a kit for preparing an essentially polymeric organic film at the surface of a solid support.

Abstract: The present invention relates to a process for chemically modifying, within its thickness, a polymer matrix chosen from matrices made of fluoropolymers and matrices made of aliphatic polymers, said process comprising at least one step consisting in irradiating said matrix with UV light having a wavelength of less than 300 nm in order to generate, within the thickness of said matrix, zones that have short polymer chains, formed by scission of the existing chains during the passage of the UV radiation and that have free radicals denoted hereinbelow as “activated zones”. The present invention also relates to the polymer matrix capable of being chemically modified by such a process.

Abstract: The present invention relates to a method for preparing an organic film on the surface of a solid support including the steps consisting in (a) applying, to said surface, by transfer or by spraying, a solution containing at least one cleavable aryl salt; (b) subjecting said solution to a UV or visible irradiation, by means of which radical entities are formed from the cleavable aryl salt and an organic film is grafted. The present invention also relates to a kit of elements for the implementation of such a method.

Abstract: The present invention relates to a process for chemically modifying, within its thickness, a polymer matrix chosen from matrices made of fluoropolymers and matrices made of aliphatic polymers, said process comprising at least one step consisting in irradiating said matrix with UV light having a wavelength of less than 300 nm in order to generate, within the thickness of said matrix, zones that have short polymer chains, formed by scission of the existing chains during the passage of the UV radiation and that have free radicals denoted hereinbelow as “activated zones”. The present invention also relates to the polymer matrix capable of being chemically modified by such a process.

Abstract: This invention relates to a method for preparing an organic film at the surface of a solid support, with a step of contacting said surface with a liquid solution including (i) at least one solvent, (ii) at least one adhesion primer, under non-electrochemical conditions, and allowing the formation of radical entities based on the adhesion primer. The liquid solution can also include (iii) at least one monomer different from the adhesion primer and radically polymerizable. This invention also relates to a non-electrically-conductive solid support on which an organic film according to said method is grafted, and a kit for preparing an essentially polymeric organic film at the surface of a solid support.

Abstract: The present invention relates to a per(3,6-anhydro)cyclodextrin derivative corresponding to one of the following formulae (I) or (II): in which: at least one of the values R1 represents a radical chosen from peptides, proteins, lipids, oligonucleotides or polynucleotides, oligosaccharides or polysaccharides, and biopolymers, and the other possible values R1, which may be identical or different, represent a group chosen from OH, OR3, OM, SH, SR3, OCOR3, NH2, NHR2,NR3R4, CONH2, CONHR3, CONR3R4, CN, COOR3, OCH2COOH, COOH, OSO2R3, N3 and R3, in which R3 and R4, which may be identical or different, represent a saturated or unsaturated, aliphatic or aromatic, hydrocarbon-based group optionally substituted with halogen atoms, which may contain one or more hetero atoms chosen from O, S and N, M represents a monovalent cation chosen from alkali metal cations; the values R2 represent a single bond or a spacer group, and n is equal to 6, 7 or 8.

Abstract: The invention relates to the fixation or separation of ions, particularly of Pb, by per(3,6-anhydro)cylcodextrin derivatives. This can be carried out by contacting the medium containing the ions to be fixed or separated, with a per(3,6-anhydro)cylcodextrin derivative of formula: in which at least one of the R1 represents OCH3, whilst the other R1 can represent OCH3, OH or other groups, for complexing the ions. Preferably, for the fixation of lead, the derivative complies with formula (I) with n=6 and all the R1=OCH3.

Abstract: The invention relates to a process for the purification of water with a view to separating therefrom at least one organic substance, particularly olfactory pollutants such as (-)geosmine and (+)2-methyl-isoborneol.This process consists of contacting the water to be purified with a cyclodextrin of formula: ##STR1## in which R.sup.1 represents a hydrogen atom, a C.sub.1 to C.sub.12 alkyl group or the acetyl group CH.sub.3 CO--, R.sup.2 and R.sup.3, which can be the same or different, represent H or R.sup.1, and n=5, 6 or 7, in order to include therein the organic substance or substances to be separated and separating the purified water from the cyclodextrin.

Abstract: The invention relates to substituted derivatives of per(3,6-anhydro)cyclodextrins, their preparation process and their use for the separation of ions.These derivatives comply with one of the formulas: ##STR1## in which the R.sup.1, which can be the same or different, represent H, a halogen, OH, OR.sub.2, OM, SH, SR.sup.2, OCOR.sup.2, NH.sub.2, NR.sup.2 R.sup.3, CONR.sup.2 R.sup.3, CONH.sub.2, CN, COOR.sup.2, COOH, OSO.sub.2 R.sup.2, N.sub.3 or R.sup.2, and n=5, 6 or 7, provided that all the R.sup.1 do not represent OH.

Abstract: Elastomers with thermoplastic properties consist of polymers grafted on an elastomeric chain which includes double bonds and active sites. The latter are more particularly halogen atoms, especially chlorine, and the grafted polymer is a polyindene or a copolymer of indene with styrene derivatives, such as .alpha.-methylstyrene or para-alkyl-styrene. In the process for preparing these thermoplastic elastomers the choice of constituent proportions, catalyst and solvent is important. Elastomers possessing at 80.degree. C. a breaking strength of at least 60 kg/cm.sup.2 can be obtained.

Abstract: This invention relates to copolymers of a macromolecular compound having a non-halogenated and double-bonded chain and of a vinylaromatic monomer and the process for obtaining same. The reaction between the macromolecular compound and the vinylaromatic monomer takes place at a temperature of between -80.degree. C and +40.degree. C in the presence of 5.10.sup.-4 to 5.10.sup.-2 mol/l of a Lewis acid initiator and possibly in the presence of a co-initiator. These copolymers obtained by cationic grafting are thermoplastics elastomers.