Abstract:
Coating compositions that can provide grease and oil resistant coating for substrates, especially paper and textile substrates, are disclosed. The coating compositions comprise water insoluble α-(1,3→glucan) polymer and/or dextran polymer and optionally other additives.
Abstract:
The invention relates to coatings made of hydrophilic uncharged polymers with hydrophobic groups on hydrophobic or hydrophobized surfaces and to methods for producing same. More specifically the invention relates to coatings of the type described above for biotechnological applications which prevent a non-specific adsorption of organic, particularly biological, material on the surfaces of apparatus, for example sensors.
Abstract:
L'invention a pour objet une sauce de couchage comprenant au moins un pigment, de l'eau et : • entre 30 et 90% en masse de dextrine (A) constitué d'au moins une dextrine de masse moléculaire moyenne en poids M A inférieure à 500 kDa; • entre 10 et 70% en masse de dextrine (B) constitué d'au moins une dextrine de masse moléculaire moyenne en poids M B ; les quantités massiques de dextrines étant rapportées à la quantité totale du mélange de dextrines (A) et (B) dans la composition, caractérisée en ce que M B est supérieure à M A +50 kDa. L'invention porte également sur un procédé de couchage de papier comprenant une étape de couchage de cette sauce, ainsi que sur le papier obtenu à l'issu de ce procédé.
Abstract:
A contact tip for a contact tonometer has a body including a contact surface, and a coating applied to the contact surface. The coating includes a light- activated material and a biocompatible water soluble adhesive for adhering the coating to the contact surface. The water soluble adhesive dissolves upon contact with the corneal tear film during a tonometric measurement, thereby releasing the light-activated material into the tear film. The present disclosure further provides a single-use tonometer contact tip product which includes a sterilized contact tip having the mentioned contact surface coating, and an opaque package containing the sterilized contact tip.
Abstract:
The present invention provides for a novel, simplified method for preparing solid surfaces coated with water-soluble activated polyhydroxypolymers. The method entails contacting a solid surface which contains substantially no amino, imino, or thiol groups with a coating solution comprising an activated polyhydroxypolymer so as to obtain bonding of the activated polyhydroxypolymer to the solid surface, followed by rinsing and optionally drying of the solid surface. The contacting reaction must take place in an aqueous medium having a pH between 1.5 and 10 and or an ion strength between 0.1 and 8. Preferred polyhydroxypolymers are naturally occurring, aldehyde group-free polymers such as polysaccharides, especially dextran, but also cellulose, agarose and starch. Also synthetic polymers, especially polyvinylalcohol are preferred. The water solubility of the polymer is preferably at least 10 mg/ml and its molecular weight is preferably at least 1,000. The activation of the polymer is preferably with functional groups selected from tresyl, maleimido, cyanogenbromide, tosyl, triflyl, pentafluorobenzenesulfonyl and vinylsulphone groups. Especially preferred activated polyhydroxypolymers are tresylated, tosylated, or maleimido activated dextran. The solid surface is preferably that of an organic polymer (such as polysterene) or of glass, a ceramic or a metal. Also provided is the solid surfaces obtainable by the process as well as of the use of the surfaces in the immobilisation of biomolecules.