Method and device for the solvent-free production of...

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 20/00 (2006.01) C09D 133/00 (2006.01)

Patent

CA 2686965

The invention relates to a method for the solvent-free production of acrylate adhesive masses, comprising (a) continuously coating a mixture, containing one or more photoinitiators and a monomer mixture comprising (i) 70 to 100% by weight compounds from the group of (meth)acrylic acid and the derivatives thereof in accordance with the general formula (I) below, with R1 being H or CH3 and R2 an alkyl chain with 2 to 20 carbon atoms; (ii) 0 to 30% by weight of olefinically unsaturated monomers having functional groups; and (iii) optionally additional components, or a prepolymer of said monomer mixture on a process carrier; b) polymerizing the coated mixture by applying radiation to the coated sections of the process carrier using visible or ultraviolet light; (c) separating the polymer product from the process carrier and forming the polymer product; (d) transferring the polymer product into a mixing device; (e) mixing the polymer product with additional components in a mixing device; and (f) further processing the polymer product/component mixture obtained in step (e).

L'invention concerne un procédé de production, sans utilisation de solvants, de matières auto-adhésives à base d'acrylate, comprenant les étapes suivantes : (a) application en continu, sur un support de traitement, d'un mélange contenant un ou plusieurs photo-initiateurs ainsi qu'un mélange monomère comprenant : (i) 70 à 100 % en poids de composés du groupe de l'acide (méth-)acrylique et de ses dérivés, correspondant à la formule générale (I) où R1 désigne H ou CH3, et R2 désigne une chaîne alkyle de 2 à 20 atomes de carbone; (ii) 0 à 30% en poids de monomères oféfiniquement insaturés présentant des groupes fonctionnels; et (iii) le cas échéant, d'autres composants, ou un prépolymère de ce mélange monomère; (b) polymérisation du mélange appliqué, par irradiation, par une lumière visible ou ultraviolette, de la portion revêtue du support de traitement; (c) séparation du polymérisat du support de traitement et moulage du polymérisat; (d) transfert du polymérisat dans un dispositif de mélange; (e) mélange du polymérisat avec d'autres composants, dans un dispositif de mélange; et (f) traitement complémentaire du mélange polymérisat-composants obtenu à l'étape (e).

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