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Applications for High-Silicone Polycarbonate Copolymers

IP.com Disclosure Number: IPCOM000249228D
Publication Date: 2017-Feb-10
Document File: 5 page(s) / 107K

Publishing Venue

The IP.com Prior Art Database

Related People

Robert Gallucci: AUTHOR

Abstract

High-silicone polycarbonate copolymers are useful in a wide variety of articles requiring elastomeric properties, for example low surface energy films and coatings, multilayer tapes and multilayer adhesives, corrosion-protective films, hydrophobic coatings, fabrics and fibers, wearable electronics, medical devices, lenses, sensors, membranes, and microstructured and nanostructured surfaces.

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This is the abbreviated version, containing approximately 18% of the total text.

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Applications for High-Silicone Polycarbonate Copolymers

Robert Gallucci February 10, 2017

Abstract: High-silicone polycarbonate copolymers are useful in a wide variety of articles requiring elastomeric properties, for example low surface energy films and coatings, multilayer tapes and multilayer adhesives, corrosion-protective films, hydrophobic coatings, fabrics and fibers, wearable electronics, medical devices, lenses, sensors, membranes, and microstructured and nanostructured surfaces.

This disclosure is directed to applications for high-silicone polycarbonate copolymers, in particular articles that contain the copolymers and their uses.

High-silicone polycarbonate copolymers suitable for the articles and uses are known and described, for example, in US patents 2,999,835; 2,999,845; 3,189,662 and 8,466,249. The salient features of these copolymers include aromatic carbonate units, for example bisphenol A carbonate units; siloxane units, for example dimethylsiloxane units present as phenolic- terminated blocks having an average of 5-200, or 10-100, or 30-60, or 10-45 siloxane units; wherein the copolymer is formed from at least 30 weight percent of a difunctional phenolic- terminated polysiloxane and no more than 70 weight percent of an aromatic dihydroxy compound. In other instances 40 to 80 wt% siloxane units may be desired for more elastic properties and lower modulus. In other instances 40-70% siloxane units may give recoverable elasticity. These copolymers can have elastomeric properties (for example recoverable elongation) but this disclosure encompasses all high-silicone polycarbonate copolymers with or without elastomeric properties, including those described in references published after the above patents.

US 8,466,249 discloses a number of articles and their uses of the copolymers at column 4, lines 14-16 and at column 21, lines 8 to 35. These include:

- parts of various shapes, for example gaskets, tubing grips, handles, push buttons, belts, connectors, tires, bladders, balls, exercise devices, athletic foot wear, cushions, wheels, washers, grommets, mallets, tool handles, medical devices, catheters, aspirators, conduits, face masks, protective devices, eyewear, cookware, housings for various electronic devices, components of lighting fixtures, ornaments, roofs, greenhouses, sun rooms, swimming pool enclosures, lamp housings, glazings

- sheets or films, or laminated articles including the sheets or films, for example mats, flooring, wrapping or packaging materials, liners for as metal or fiber articles, containers, covers, closures, electrical insulating tapes, sound recording tapes, pipe coverings, membranes, treated covers for pictures paintings, posters, and like display items;

- fibers used for yarn, thread, bristles, rope, etc., dyed or undyed; - conformal surface coverings for appliances and the like, coatings for rods and wire, slot

insulation in dynamoelectric machines - bonding material for parts or laminates and in ad...