PROCESS FOR THE PREPARATION OF HYDROXYL-FUNCTIONALIZED POLYSILOXANES

• Main Authors: WOZNICKA, MARTA, KLEIN, JOHANN, BRIERS, DAVID, DUNEKAKE, RALF, WINTERBERG, MARLEEN, MEJIA, ESTEBAN, DIETRICH, ANNIKA, LUND, HENRIK, DESPOTOPOULOU, CHRISTINA, KRAGL, UDO
• Format: Patent
• Language: English; Polish
• Published: 20.09.2021
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS AS ADHESIVES; USE OF MATERIALS THEREFOR; WOODSTAINS

A method for producing a hydroxyl-functionalized polysiloxane having secondary or tertiary hydroxyl groups, said method comprising the steps of: i) reacting a hydroxyalkyl allyl ether having a secondary or tertiary alcohol group with a siloxane under anhydrous conditions and under transition metal catalysis, said hydroxylalkyl allyl ether conforming to Formula (I) wherein n is 0, 1, 2, 3, 4 or 5, preferably 0; m is 1, 2, 3, 4 or 5, preferably 1; spacer group A is constituted by a covalent bond or a C 1 -C 20 alkylene group; R 1 is hydrogen, a C 1 -C 8 alkyl group, a C 3 -C 10 cycloalkyl group, a C 6 -C 18 aryl group or an aralkyl group; R a , R b , R c , R d , R 2 , R 3 , R 4 and R 5 may be the same or different and each is independently selected from hydrogen, a C 1 -C 8 alkyl group, a C 6 -C 18 aryl group or a C 6 -C 18 aralkyl group, with the proviso that at least one of R 3 and R 4 is not hydrogen; and said siloxane conforming to Formula (II) wherein m is 1, 2, 3, 4 or 5, preferably 1; R 6 , R 7 , R 8 and R 9 may be the same or different and each represent a C 1 -C 8 alkyl group, a C 3 -C 10 cycloalkyl group, a C 6 -C 18 aryl group or a C 6 -C 18 aralkyl group; and ii) in the presence of the reaction product of step i), performing a ring opening polymerization of at least one cyclic siloxane monomer.