Janßen, Christian Oliver

Described is an interlayer for an illuminable laminated glazing comprising a polyvinyl acetal, 22.0 to 45.0 % by weight of at least one plasticizer and a functional layer on at least one surface comprising light scattering particles with an improved surface roughness.

The invention is directed to the polyvinyl acetals with an improved undissolved particle count, methods for the production of such polyvinyl acetals and their use as binder for the production of ceramic green sheets.

The invention is directed to a method to manufacture laminated glazing having at least one decorative obscuration area at an outer area of the laminated glazing by combining two sheets of glass with an interlayer film comprising at least one film A containing a polyvinyl acetal PA and at least one film B containing a polyvinyl acetal PB and at least one plasticiser WB, wherein film A has the shape of the obscuration area characterised in thata) a film A' having at least the surface area and shape of film B is provided wherein at least one surface of film A' is entirely provided with the optical properties of the obscuration areab) printing on the least one surface of film A' with the optical properties of the obscuration area at least in part a coating having different optical properties as the obscuration areac) cutting film A' at least into the inner shape of the obscuration area thus obtaining film Ad) combining films A and film B into the interlayer filme) combining two sheets of glass with the thus obtained interlayer film.

1. The present invention relates to a method for preparing a laminated glass with a three-dimensional decorative pattern comprising the following steps, in that order:a. Providing a first layer, comprising a first thermoplastic resin, and having a first glass transition temperature;b. Applying a second layer, comprising a second thermoplastic resin, and having a second glass transition temperature, which is higher than the first glass transition temperature, comprising the three-dimensional decorative pattern;c. Laminating the first and the second layer between two sheets of rigid material, wherein the three-dimensional decorative pattern of the second layer is pushed into the first layer displacing at least partially the first layer during the lamination process.

The invention is directed to a method of providing at least one first surface area of a PVB film with a functional layer and at least one second surface area of a PVB film not with a functional layer, characterized in bringing a transfer film comprising at least one adhesive layer and at least one functional layer with the adhesive layer in contact with a surface of the PVB film, pressing the transfer film on the at least one first surface area of the PVB film at temperatures of 100 - 200°C and removing the transfer film from the at least one second surface area of the PVB film.

The present invention is directed to a method for manufacturing a pigmented interlayer film by simultaneous extrusion of at least three sublayers, each comprising the same or a different polyvinyl acetal, at least one plasticiser and pigments characterised ina. providing a masterbatch, comprising at least one plasticiser and the pigmentsb. providing at least three mixtures from the masterbatch and the polyvinyl acetalsc. extrusion of the mixtures into at least three sublayers which are combined into the interlayer filmwherein at least one sublayer has a different plasticiser and pigment content than the other sublayers.

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