Dow Corning Corporation

Ming-Hsiung Yeh

Chi-long Lee

Antony P Wright

Kyuha Chung

Steven M Evans

Leroy Elton Thayer

John D Jones

The present invention relates to the composition, preparation, and use of multi-layer composite films comprising a core layer of low gas permeable material, two intermediate layers sandwiching the core layer, and two outer layers sandwiching the two intermediate layers. The core layer provides the excellent oxygen barrier property, whereas the intermediate and outer layers protect the core layer so the oxygen permeability of the resulting multi-layer composite film becomes independent on relative humidity.

Film for packaging having oxygen barrier characteristics

The present invention relates to a method of controlling the polymerization of acrylates using a catalyst which is selected from at least one of zinc, cadmium, or mercury halides in combination with free iodine to give acrylate polymers having narrow molecular weight distributions, via group transfer polymerization.

Method of controlling the polymerization of acrylates

Barrier film for packaging

The present invention relates to the composition and preparation of composite films which exhibit low oxygen and flavor/aroma transmission rates. The film comprises a silane resin coated on a plastic substrate. The silane resin is formed from the mixture of a silane solution, an acrylate, a solvent, and optionally, either an additive, water or both. This invention teaches that a variety of silane solutions and acrylates may be mixed with different solvents to achieve the desired oxygen and flavor/aroma barrier characteristics.

Silane coated flavor/aroma barrier film

The process of the present invention teaches a novel method of cleansing a silane coated substrate of excess vinyl benzaldehyde. The basic process comprises the step of rinsing the silane coated substrate in acid, prior to exposing the silane coated film to the beverage. Alternatively, the silane coated substrate may be washed with water after the silane coated substrate is rinsed in the acid. Another alternate method teaches repeating the acid wash and water rinse steps either with the same or a different acid.

Method for cleaning an aldehyde from silane coated container with an

A composite films which exhibit low oxygen transmission rates. The film comprises a silane resin coated on a plastic substrate then cured by ultraviolet radiation. For the silane coating, this invention relies on a class of organosilicon compounds derived from 1) organohydrogensilanes or organohydrogensiloxanes and 2) propargyl esters of carboxylic acids containing a terminal aromatic hydrocarbon radical, where the carbopropynoxy group of the ester and the aromatic hydrocarbon radical are separated by at least two adjacent ethylenically unsaturated carbon atoms. If more than two of these carbon atoms are present they form a sequence of conjugated ethylenic double bonds which allows the polymer to cross-link upon exposure to ultraviolet radiation.

Method of producing an oxygen barrier coating containing trimethoxysilyl

The present invention provides microencapsulated hydrosilylation catalysts for one-part heat curable organosiloxane compositions. Compositions containing these exhibit long-term storage stability yet cure rapidly when heated above the melting point of the encapsulating polymer. At least a portion of these microcapsules are less than one micron in diameter, and substantially all are less than about three microns in diameter. Compositions containing the preferred platinum group metals as catalysts are optically transparent. The microencapsulated curing catalysts of this invention are prepared by irradiating with UV light in the wavelength range of from 300 to 400 nanometers a solution containing (1) at least one of a specified group of photocrosslinkable organosiloxane compounds derived from propargyl esters of carboxylic acids containing a terminal aromatic hydrocarbon radical and at least two ethylenically unsaturated carbon atoms and (2) a liquid or solubilized hydrosilylation catalyst.

Storage stable heat curable organosiloxane compositions containing a

Novel propargyl esters are prepared by a base catalyzed condensation reaction of propargyl esters of carboxylic acids containing a labile hydrogen atom at the alpha position relative to the carboxy group, and a terminal aromatic hydrocarbon radical that is linked to the carboxy group through a sequence of carbon atoms containing at least one carbon-to-carbon double bond. If more than one of these double bonds are present they form a conjugated sequence. Novel organosilicon compounds are prepared by reacting these propargyl esters with an organohydrogensilane or an organohydrogensiloxane. The organosilicon compounds undergo a reversible crosslinking reaction in the presence of ultraviolet light.

Propargyl esters of carboxylic acids containing conjugated ethylenic

A process for improving the bath life and/or cure time of curable compositions. The process comprises first mixing an inhibitor with a catalyst, then adding that mixture to an organosilicon compound, and then adding the resulting mixture to an organohydrogensilicon compound. The process can optionally comprise a bath life extender compound. This process produces curable coating compositions which have a long bath life at room temperature and/or a rapid cure time at elevated temperatures such that they are useful in fast-paced coating operations, such as adhesive release coating operations wherein the cured coating is further coated with an adhesive immediately after being cured.

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Midland, MI, United States of America

Ming-Hsiung Yeh