The invention relates to metastable polymer compositions, use thereof for manufacturing medical devices or medical device components having a slippery surface as well as the devices with slippery surfaces resulting from these metastable polymer compositions, in particular in the field of ophthalmic injectors.

The invention relates to metastable polymer compositions, use thereof for manufacturing medical devices or medical device components having a slippery surface as well as the devices with slippery surfaces resulting from these metastable polymer compositions, in particular in the field of ophthalmic injectors.

Disclosed herein is a use of a composition, comprising a non-toxic polyanionic material or a salt thereof to dissociate a polymeric membrane. In addition, a method of dissociating a polymeric membrane is also presented, the method comprising the steps of providing a polymeric membrane; and dissociating the polymeric membrane by adding a composition comprising a non-toxic polyanionic material to the polymeric membrane.

Disclosed herein is a use of a composition, comprising a non-toxic polyanionic material or a salt thereof to dissociate a polymeric membrane. In addition, a method of dissociating a polymeric membrane is also presented, the method comprising the steps of providing a polymeric membrane; and dissociating the polymeric membrane by adding a composition comprising a non-toxic polyanionic material to the polymeric membrane.

The invention provides polyamine derivatives, a use of the polyamine derivatives for the transfection of polyanions into cells, and a method of transfecting cells with a polyanion, comprising mixing said polyanion with a polyamine derivative e.g. in a buffer and treating said cells with the mixture obtained in the previous step.

The invention provides polyamine derivatives, a use of the polyamine derivatives for the transfection of polyanions into cells, and a method of transfecting cells with a polyanion, comprising mixing said polyanion with a polyamine derivative e.g. in a buffer and treating said cells with the mixture obtained in the previous step.

The instant invention pertains to a method and a fluid composition for producing contact lenses with improved lens quality and with increased product yield. The method of the invention involves adding a Butylated Polyvinylpyrrolidone into a fluid composition including a lens-forming material in an amount sufficient to reduce an averaged mold separation force by at least about 20% in comparison with that without the Butylated Polyvinylpyrrolidone.

Thermally cross-linkable photo-hydrolyzable inkjet printable polymers are used to print microfluidic channels layer-by-layer on a substrate. In one embodiment, for each layer, an inkjet head deposits droplets of a mixture of hydrophobic polymer and cross-linking agent in a pattern lying outside a two-dimensional layout of the channels, and another inkjet head deposits droplets of a mixture of poly(tetrahydropyranyl methacrylate) PTHPMA (or another hydrophobic polymer which hydrolyzes to form a hydrophilic material), cross-linking agent, and a photoacid generator (PAG) in a pattern lying inside the two-dimensional layout of the channels. After all layers are printed, flood exposure of the entire substrate to UV radiation releases acid from the PAG which hydrolyzes PTHPMA to form hydrophilic poly(methacrylic acid) PMAA, thereby rendering the PTHPMA regions hydrophilic. The layers of these now-hydrophilic patterned regions together define the microfluidic channels. The cross-linking agent (e.g., triallyl isocyanurate TAIC) forms covalent cross-links between the two polymer phases.

The present invention concerns a process for preparing self-binding pigment particles from an aqueous suspension of a calcium carbonate containing material, wherein an anionic binder and at least one cationic polymer are mixed with the suspension.

The present invention concerns a process for preparing self-binding pigment particles from an aqueous suspension of a calcium carbonate containing material, wherein an anionic binder and at least one cationic polymer are mixed with the suspension.