Abstract: A lens care container (1), in particular for contact lenses such as hard or soft contact lenses, comprises: a receptacle (2) for receiving a lens and a lens care liquid, a cap (3) configured to be attached to the receptacle (2) to close the receptacle (2), a sensor (5) configured to indicate an actual loading of the container (1) with germs or configured to indicate a pH value of the lens care liquid in the receptacle (2). The sensor (5) is arranged in the receptacle (2) when the cap (3) is attached to the receptacle (2).

Abstract: The invention is generally related to a process for producing a relatively high molecular weight poly(methacrylic acid) (“PMAA”) in a water-based system. The process of the invention comprises polymerization of from about 1% to about 20% by weight of methacrylic acid in water or a water-based system in the presence of thiol compound and an azo radical initiator under controlled reaction and process conditions. A process of the invention can be easily scaled up into the pilot scale for producing large quantities of high molecular weight PMAAs. The invention is also related to high molecular weight poly(methacrylic acid)s obtained according to a process of the invention.

Abstract: A lens care container (1), in particular for contact lenses such as hard or soft contact lenses, comprises: a receptacle (2) for receiving a lens and a lens care liquid, a cap (3) configured to be attached to the receptacle (2) to close the receptacle (2), a sensor (5) configured to indicate an actual loading of the container (1) with germs or configured to indicate a pH value of the lens care liquid in the receptacle (2). The sensor (5) is arranged in the receptacle (2) when the cap (3) is attached to the receptacle (2).

Abstract: The invention is generally related to a process for producing a relatively high molecular weight poly(methacrylic acid) (“PMAA”) in a water-based system. The process of the invention comprises polymerization of from about 1% to about 20% by weight of methacrylic acid in water or a water-based system in the presence of thiol compound and an azo radical initiator under controlled reaction and process conditions. A process of the invention can be easily scaled up into the pilot scale for producing large quantities of high molecular weight PMAAs. The invention is also related to high molecular weight poly(methacrylic acid)s obtained according to a process of the invention.

Abstract: The invention is generally related to a process for producing a relatively high molecular weight poly(methacrylic acid) (“PMAA”) in a water-based system. The process of the invention comprises polymerization of from about 1% to about 20% by weight of methacrylic acid in water or a water-based system in the presence of thiol compound and an azo radical initiator under controlled reaction and process conditions. A process of the invention can be easily scaled up into the pilot scale for producing large quantities of high molecular weight PMAAs. The invention is also related to high molecular weight poly(methacrylic acid)s obtained according to a process of the invention.

Abstract: The present invention relates to a method and an apparatus (5) for determining a coefficient of friction at a test site (11) on a surface (10) of a contact lens (1). The apparatus comprises: a lens holder (2) arranged at least partially in a receptacle (6); a slide (4) comprising a counter surface (40) made of lapped aluminum for contacting the test site (11); a load generator (7) configured to apply a predetermined normal load (Fn) between the counter surface (40) and the test site; a drive (8) configured to generate a sliding movement between the counter surface (40) and the contact lens in direction located in a plane perpendicular to the normal load (Fn); and a force sensor (9) configured to measure a tangential frictional force (Ft) between the test site and the counter surface (40) along the direction of the sliding movement.

Abstract: The invention is generally related to a process for producing a relatively high molecular weight poly(methacrylic acid) (“PMAA”) in a water-based system. The process of the invention comprises polymerization of from about 1% to about 20% by weight of methacrylic acid in water or a water-based system in the presence of thiol compound and an azo radical initiator under controlled reaction and process conditions. A process of the invention can be easily scaled up into the pilot scale for producing large quantities of high molecular weight PMAAs. The invention is also related to high molecular weight poly(methacrylic acid)s obtained according to a process of the invention.

Abstract: The present invention relates to a method and an apparatus (5) for determining a coefficient of friction at a test site (11) on a surface (10) of a contact lens (1). The apparatus comprises: a lens holder (2) arranged at least partially in a receptacle (6); a slide (4) comprising a counter surface (40) made of lapped aluminum for contacting the test site (11); a load generator (7) configured to apply a predetermined normal load (Fn) between the counter surface (40) and the test site; a drive (8) configured to generate a sliding movement between the counter surface (40) and the contact lens in direction located in a plane perpendicular to the normal load (Fn); and a force sensor (9) configured to measure a tangential frictional force (Ft) between the test site and the counter surface (40) along the direction of the sliding movement.

Abstract: A heat-treated polymer particle comprising an addition polymer core particle which has had swollen and polymerized therein a blend of an aromatic alcohol with an aldehyde or a blend of an aromatic amine or urea with an aldehyde and which has been subsequently heat treated, e.g. to a temperature of at least 150° C.

Abstract: A heat-treated polymer particle comprising an addition polymer core particle which has had swollen and polymerised therein a blend of an aromatic alcohol with an aldehyde or a blend of an aromatic amine or urea with an aldehyde and which has been subsequently heat treated, e.g. to a temperature of at least 150° C.

Abstract: The invention provide a class of actinically-crosslinkable silicone-containing prepolymers which comprise dangling polysiloxane chains each having a terminal ethylenically-unsaturated group and are obtained in a one-step of RAFT polymerization of a reactive mixture comprising a polysiloxane crosslinker, a hydrophilic vinylic monomer, a RAFT agent, and a free-radical initiator. The present invention is also related to silicone hydrogel contact lenses made from a prepolymer of the invention and methods for making the contact lenses in a cost-effective way and with high consistency and high fidelity to the original lens design.

Abstract: The invention provide a class of actinically-crosslinkable silicone-containing prepolymers which comprise dangling polysiloxane chains each having a terminal ethylenically-unsaturated group and are obtained in a one-step of RAFT polymerization of a reactive mixture comprising a polysiloxane crosslinker, a hydrophilic vinylic monomer, a RAFT agent, and a free-radical initiator. The present invention is also related to silicone hydrogel contact lenses made from a prepolymer of the invention and methods for making the contact lenses in a cost-effective way and with high consistency and high fidelity to the original lens design.