Abstract: A method of treating a contact lens wherein the lens is contacted with a solution containing a biguanide or water-soluble salt thereof, in combination with a borate buffer system, said biguanide having the formula: ##STR1## wherein n is from 1 to 500, said biguanide being present in an amount from 0.000001 to 0.0003 weight percent.

Abstract: A polymer represented by the general formula ##STR1## where m is the average degree of polymerization of the polymer, y is an integer from 1 to 3, x is an integer from 1 to 10, A denotes a halogen atom and R denotes an alkyl radical with 1 to 6 carbon atoms.

Abstract: A fluorosilicone based polymeric material with a fluorinated methacrylate functional crosslinker and an internal wetting agent.

Abstract: An improved wetting solution for contact lenses is disclosed. The solution contains collagen as a wetting agent and preferably a biguanide as a preservative.

Abstract: An improved wetting solution for contact lenses is disclosed. The solution contains gelatin as a wetting agent in an amount less than 1% by weight of the solution so that the viscosity of the solution is substantially less than 15 CPS at 25.degree. C. The solution may also contain a biguanide as a preservative.

Abstract: The physical properties of highly oxygen-permeable continuous-wear contact lenses, comprising a copolymer of an organosilicone monomer, a fluoroalkyl ester monomer and a hydrophilic monomer, are improved by the further addition of a linear polysiloxane oligomeric cross-linking agent with or without neopentylglycol dimethacrylate.

Abstract: A preserving solution comprising a microbicidally or fungicidally effective amount of a biguanide or water-soluble salt thereof, in combination with a buffer system, said biguanide having the formula: ##STR1## wherein n is from 1 to 500, said biguanide being present in an amount from 0.000001 to 0.0003 weight percent, useful for preserving, for example, a cosmetic formulation.

Abstract: While polymerizing a contact lens monomer in a mold, grooves or other surface configurations are formed on the resulting polymeric lens surface by irradiating the monomer through a mask pattern which corresponds to the grooves or other desired configurations.

Abstract: A tinted soft contact lens such as a hydrated hydrogel lens having a variegated iris pattern is prepared by forming an iris pattern on the lens with a viscous paste which can contain an unoxidized vat dye. The lens is treated with a developer solution to obtain a tinted lens having an iris pattern which can be clear or different in color or in hue from the surrounding iris area.

Abstract: Novel ultraviolet absorbing compounds useful in contact lenses and methods for curing contact lenses containing UV absorbers are disclosed.

Abstract: A sustained-release polymeric hydrogel dosage form useful for topical, systemic or transdermal administration of a medicinal agent comprising a cross-linked, polymerized hydrophilic polymer, an amino acid polymer, a cross-linking agent, and an optional hydrophobic monomer and/or a chain regulator in conjunction with a lower alkyl (C.sub.1 -C.sub.4), polar solvent and said medicinal agent in a therapeutically effective amount.

Abstract: Cosmetic contact lenses, which are tinted with daylight fluorescent pigments in the iris area, can change the wearer's apparent iris color to any desired color, including changing a dark iris to a lighter color such as blue or green.

Abstract: Hybrid contact lenses and other composite polymeric articles of precise dimensions are made by placing a first monomer composition in a mold and irradiating and polymerizing a central portion only with ultraviolet radiation. Unpolymerized monomer is removed, a second monomer composition is placed in contact with the polymer formed from the first monomer composition and the latter is polymerized by ultraviolet irradiation or by other means to obtain a composite article which is then machined to form a hybrid lens.

Abstract: A cosmetic soft contact lens which alters the apparent color of the iris by employing small light reflecting particles imbedded in a colored transparent matrix.The lens is made in the hard state from a xerogel blank having a colored pupil area surrounded by a colored iris area having imbedded light reflecting particles. A clear peripheral area is present outside the iris area. A zerogel contact lens is made from the cosmetic blank and hydrated to form a larger soft hydrogel cosmetic contact lens.The cosmetic contact lens serves a dual purpose to correct the visual errors and change the apparent color of the eye. The natural iris pattern is visible through the lens providing a natural appearance.

Abstract: Compositions which are particularly useful as coupling agents and primers for polyolefin composites. The compositions comprise fumaric acid and diaminefunctional silanes in mole ratios from 1.0 to 1.4 in nonreactive solvent, particularly water. These compositions are particularly effective in polyethylene composite materials.

Abstract: A method for molding articles where a composition is used to treat at least one shape determining face of a mold to impart durable release characteristics to said face which last through multiple molding cycles. The compositions comprise by weight 20 parts of primarily hydroxyl endblocked polydimethylsiloxane, 2 to 10 parts of alkyltriacetoxysilane, 20 to 80 parts of nonreactive organic solvent, and, optionally, 0.001 to 2 parts organometallic catalyst.

Abstract: A release coating used in cooking and baking comprising a thermosettable polyorganosiloxane resin, a noncurable polydiorganosiloxane fluid, and a combination of at least two metal containing compounds. Optionally, the coatings may contain carboxylic acid.

Abstract: A method for painting coil coated substrates which comprised (a) coating said substrate with a primer composition comprising organoxysilane, tetralkyltitanate, and a volatile organic solvent, (b) drying said primer coat, and (c) coating said dried primer coat with a protective coating.

Abstract: A siloxane treating composition comprises (1) a mixture and/or a reaction product of (A) a polydiorganosiloxane having at least one silicon-bonded --OX group, X being H, alkyl or alkoxyalkyl and at least one silicon-bonded aminoalkyl or polyaminoalkyl acid salt group, and (B) a silicon compound having more than 2 silicon-bonded groups which are reactive with --OX of (A), and (2) a water-soluble solvent for (A) which comprises one or both glycol ethers of the formula C.sub.4 H.sub.9 --O--(CH.sub.2 --CH.sub.2 --O).sub.n H where n is 1 or 2. These compositions have improved penetration ability and stability, especially when used as aqueous composition for rendering substrates, such as masonry, hydrophobic.Also claimed is a process for making such compositions and a process for applying them to substrates.

Abstract: What is disclosed are aqueous emulsions which are formed by the use of certain organofunctional cationic silanes. The emulsions are stable and are formed using reactive silanes that allow the transfer of water immiscible liquids and the silanes to certain substrates with the avoidance of any subsequent re-wetting or re-solubilizing of the silane or water immiscible liquid, and subsequent loss from the surface thereof.