Essilor International (compagnie Generale D'optique)

National Starch and Chemical Investment Holding Corporation

Other

University of Florida Research Foundation Inc

University of Georgia Research Foundation Inc

Sirisoma Wanigatunga

Yassin Yusef Turshani

Aref Jallouli

Martin Rickwood

Paul R Mudge

Gabriel Keita

Charles R Kutal

Peiqi Jiang

John J Tsai

Kenneth Boone Wagener

John C Leighton

Natalie Morawsky

Kimberly Morgan

Spirotetrathiocarbamates (STOCs) or oxa substituted compounds (SOTOCs) of Formula I: Formula (I) or bisSTOC or bisSOTOC compounds of Formula II: Formula (II) wherein X, X, X, X, X, X, X, and X, are independently O or S; and preferably at least two and up to all four of X, X, Xand X, and at least two and up to all four of X, X, X, and Xare sulfur; Z is &#x2014;CRwherein m=1 to 4; &#x2014;C(R)SC(R)&#x2014;, C(R)SSC(R)&#x2014;, or &#x2014;C(R)OC(R); n is from 0 to 4; M is selected from CHCl, CHSC(O)R, CHSC(S)R, CHS(CHCHS)qH wherein q is 0, 1 or 2; &#x2014;CR&#x2550;CH, &#x2014;CHOC(O)CR&#x2550;CH, CHN&#x2550;C&#x2550;S, CHN&#x2550;C&#x2550;O, CHNRH, CHOH, CHSCHCHCR&#x2550;CH, phenyl, C(R)phenyl, furan, thiophene, halogen, C-Ccycloalkyl, C-Cheretocyclics, thiol, H, (III) or (IV) wherein A is S, O or phenyl; x is 0 or 1; Ris C-Calkyl; and Ris H or C-Calkyl have excellent optical properties. Methods for preparing these compositions and optical lenses prepared from the compounds are also provided.

Spirotetrathiocarbamates and spirooxothiocarbamates

Disclosed is a thiosphosphine compound of formula: wherein X represents with Rbeing H or &#x2014;CH, R and R' represent, independently from each other, an alkyl radical, an alkoxy radical, an aryl radical or a phenyl radical which may be substituted with one or more alkyl and/or alkoxy groups, n is an integer from 0 to 4, n&#x2032; is an integer from 0 to 5, x is an integer from 0 to 2, y is an integer from 1 to 5 with the proviso that y+n is an integer from 1 to 5. The compounds can be used to make optically transparent articles such as ophthalmic lenses.

Thiophosphine compounds

Disclosed is a process for making a thiophosphine compound of formula (I): wherein X represents SH or with Rbeing H or &#x2014;CH, R and R' represent, independently from each other, an alkyl radical, an alkoxy radical, an aryl radical or a phenyl radical which may be substituted with one or more alkyl and/or alkoxy groups, n is an integer from 0 to 4, n&#x2032; is an integer from 0 to 5, x is an integer from 0 to 2, y is an integer from 1 to 5 with the proviso that y+n is an integer from 1 to 5, wherein y =1, X is in para position with regard to phosphorus and represents SH.

Process for making thiophosphine compounds

The invention relates to a process for polymerising a monomer, polymerizing and/or crosslinking an oligomer, or crosslinking a polymer or copolymer, said monomer, oligomer, polymer and copolymer being selected among precursor monomers, urethane, thiourethane and episulfide oligomers, and urethane, thiourethane and episulfide polymers and copolymers, which comprises:

Anionic and Lewis base photopolymerization process and its use for making optical articles

Thiophosphine compounds (also named phosphine sulfide compounds) and their use for making polymerizable compositions which after polymerization give optically transparent articles, such as ophthalmic lenses, having improved mechanical and optical properties and in particular having an improved UV cut.

Thiophosphine compounds and methods of making polymerizable compositions containing them and their use for making ophthalmic lenses

The invention relates to a process for polymerising a monomer, polymerizing and/or crosslinking a oligomer, or crosslinking a polymer or copolymer, said monomer, oligomer, polymer and copolymer being selected among precursor monomers, urethane, thiourethane and episulfide oligomers, and urethane, thiourethane and episulfide polymers and copolymers, which comprises:

Cationic photopolymerization of diepisulfides and application to the manufacture of optical lenses

Photopolymerization of episulfides using metal complexes and its use for making ophthalmic lenses

A zwitterionic monomer having amino-multicarboxylic acid functionality having Structure (I)

Zwitterionic monomer having amino-multicarboxylic acid functionality

Hair fixative carboxylated polymers are stabilized in an aqueous emulsion by neutralization with a cosmetically acceptable organic or inorganic base, require no organic solvent, no propellant when dispensed in non-aerosol containers, and minimal organic propellant when dispensed in aerosol containers.

Emulsion polymers for use in hair fixatives

A process for the emulsion polymerization of graft copolymers comprising the steps of: a) obtaining an unsaturated polymer containing terminal or pendant polymerizable functionalities; b) dissolving the resultant unsaturated polymer in an ethylenically unsaturated monomer in the presence of a surfactant in water to form an aqueous phase; c) microfluidizing the aqueous phase of (b) to a size of less than 0.5 u; and d) subsequently graft polymerizing a monomer with the unsaturated polymer in the microfluidized aqueous phase using free radical polymerization techniques; such that the graft polymerization reaction occurs within each micelle thereby resulting in uniform particles of the predetermined particle size.

Graft polymerization process using microfluidization in an aqueous

Emulsion binders which do not generate formaldehyde during cure are prepared for use in nonwoven products by using a emulsion copolymer comprising by weight about 100 parts C.sub.1 -C.sub.8 alkyl acrylate or C.sub.1 -C.sub.8 alkyl acrylates in combination with styrene, acrylonitrile, vinyl acetate and combinations thereof, about 1 to 20 parts hydroxyalkyl acrylate or methacrylate, about 2 to 20 parts meta or para isopropenyl-.alpha.,.alpha.-dimenthyl benyl isocyanate and optionally 0.1 to 5 parts of a multifunctional monomer. The binders are useful in the formation of heat resistant flexible products for use in roofing, flooring and filtering materials, as well as for facings and other applications in general purpose nonwoven products.

Formaldehyde-free nonwoven binder composition

Poly(siloxane-pivalolactone) thermoplastic elastomers and methods for their preparation by graft polymerizing pivalolactone onto a polysiloxane backbone.

Growing community of inventors

Largo, FL, United States of America

Sirisoma Wanigatunga