Other

Trinseo Europe Gmbh

Arkema France

Atofina

Gary A Hall

Jiaxin Jason Ge

Florence Mehlmann

Michael Timothy Burchill

Jack J Reilly

Millard Manley Williams

Jana Lamberson

Larry J Van Zee

Brian M Cromer

Thomas DeMain

The invention relates to acrylic copolymers and terpolymers incorporating high Tg, hydrophobic (meth)acrylates that have high thermal stability and excellent optical properties. These copolymers are optically clear, and provide a copolymer having a Tg of 115-140 C, along with sufficiently high molecular weight. The copolymer is found to exhibit high heat resistance, high light transmission, low haze, low moisture uptake, excellent environmental stability, excellent high temperature thermal stability, and excellent mechanical properties, along with excellent UV resistance. The copolymer, or terpolymer may be used to form lighting pipes, thin wall parts, optical lenses, extruded films, (co-)extruded sheets/profiles, thermo-formable sheets, cast sheets, composites, etc.

Hydrophobic high heat optical acrylic copolymers

A high Tg acrylic copolymer includes methyl methacrylate with one or more high Tg hydrophobic monomers. The copolymer includes: a) at least one of tert-butyl cyclohexyl methacrylate, 3,3,5-trimethylcyclohexyl(meth)acrylate, tetrahydrofurfuryl methacrylate, or a mixture thereof; and b) (meth)acrylate monomer. The copolymer has the following properties: i) Tg of from 116° C. to 140° C.; ii) Mw of at least 110,000; and iii) a residual monomer level of less than 1.0 weight percent. The copolymer exhibits high heat resistance, high light transmission, low haze, low moisture uptake, excellent environmental stability, excellent high temperature thermal stability, and excellent mechanical properties, along with excellent UV resistance. The high molecular weight hydrophobic copolymer of the invention has the excellent environmental stability required for electronic components in automotive, displays, smartphones, photovoltaics, and others.

Heat resistant PMMA copolymers having high temperature and high humidity environmental stability for electronic component applications

The invention relates to high efficiency diffusion lighting coverings useful in LED lighting applications. The diffusing lighting coverings are made of organic diffusing particles homogeneously dispersed in a transparent polymer matrix. The primary organic diffusing particles are refractive index mis-matched to the matrix polymer. The refractive index contrast between the polymer matrix and diffusion particles, and particle size are selected to provide a high efficiency (minimized particle loading). The high efficiency diffusion coverings provides excellent light diffusion, high hiding properties and high light transmission. The secondary diffusion particles may optionally be added to further improve selected target properties of the covering. Nano-sized ZnO inorganic particles may also function as diffusion particles and optical brighteners as well UV stabilizers. Articles made of this translucent composition are useful in commercial and residential lighting, motor vehicle illumination (lights, panels), street lighting, displays and signs, desktop monitors, and LCD/LED TVs.

High efficiency diffusion lighting coverings

The invention relates to blend materials useful in LED lighting applications. The diffusing particle blend is a synergistic mixture of selected organic particles and selected inorganic particles of specific composition, loading, and a refractive index difference with the matrix polymer, that provide excellent light diffusion, high hiding properties and good light transmission. Articles made of this blend are useful in commercial and residential lighting, motor vehicle illumination (lights, panels), street lighting, displays and signs.

Optical diffusion blend materials for LED lighting

Disclosed is a mar resistant transparent co-extruded sheet which is comprised of (a) a cap layer containing particles having a mean particle size of about 1 to 60 microns wherein 90% of the particles are less than 70 microns, at a loading of 0.1 to 18%, melt blended with an acrylic matrix, wherein the particle and matrix have refractive indices within 0.020 units when measured in conformance with ASTM D 542; and (b) a clear substrate layer comprised of an acrylic composition, wherein the substrate has a refractive index within 0.020 units of the refractive index of the cap layer matrix when measured in conformance with ASTM D 542; wherein the co-extruded product has (i) a luminous transmission (CIE tristimulus Y value) of greater than 90% when measuring spectral transmission data using a Macbeth&#xae; Color-Eye&#xae; 7000 spectrophotometer (Division of Kollmorgen Instruments Corporation), Illuminant C, and the 2&#xb0; standard observer, and calculating the CIE tristimulus Y value in conformance with ASTM E 308, and (ii) a haze of less than 16% when measured in conformance with ASTM D 1003, and at least one of (iii) or (iv), (iii) a 60&#xb0; gloss value measured on a 0.118 inch thick sample within 15 units of the 60&#xb0; gloss value measured on a 0.080 inch thick sample when measured using a micro-TRI-gloss meter made by BYK-Gardner GmbH in conformance with ASTM D 523 using a black felt backing, and (iv) a change in haze as measured in conformance with ASTM D 1044, after 500 revolutions using a 500 g load and CS10F wheel, of less than 25%.

Mar resistance, non-glare transparent acrylic sheet with consistent optical properties at various sheet thicknesses

An opening and closing apparatus for feed drops in a feed conveying system has a plurality of containers are disposed for receiving feed from a conveyor system, each of the containers having an opening in the bottom thereof. A respective valve member is disposed adjacent each one of the openings and each respective valve member has a closed position for preventing feed from falling out of each respective opening, and an open position permitting the feed to fall out of each respective container through each respective opening therein. A somewhat rigid transverse member is provided adjacent to each one of the containers and this transverse member is biased to a first position and is movable to a second position. A respective elongated member is operatively attached at one end thereof to the transverse member and is operatively attached to a respective one of the valve members at the other end thereof.

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Oaklyn, NJ, United States of America

Gary A Hall