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Matches 451 - 500 out of 4,139

Document Document Title
WO/1991/018929A1
What is described herein is an improved precipitation polymerization process and copolymer products produced thereby. The process herein is carried out by charging a reactor with a solvent in which the copolymer product is substantially ...  
WO/1991/018303A1
The present invention relates to a method for fabricating an optical lens with refraction index modulation, characterized in that, starting from a transparent hydrophilic polymer lens of the hydrogel type, previously shaped, said lens is...  
WO1991015526A3  
WO/1991/016057A1
Colonic-targeted oral drug dosage forms composed of a drug confined within a crosslinked hydrogel that exhibits pH-dependent swelling and is composed of an ionizable comonomer such as acrylic acid, a nonionizable comonomer such as an acr...  
WO/1991/015947A1
What is provided herein is a method for preparing a product which comprises discrete microdroplets of an oil in water stabilized by in situ polymerization of a water-soluble vinyl monomer. The method comprises dispersing the oil in water...  
WO/1991/015526A2
The invention provides acrylamide polymers that, when mixed with water solvent, provide thermoreversible solutions that form low viscosity melts at temperatures separated by a third region of maximum viscosity.  
WO/1991/015522A1
An uncrosslinked, water-soluble polyvinylpyrrolidone having a K-value in excess of 120 and containing less than about 0.1 percent by weight of residual monomer. A method for preparing the high molecular weight polyvinylpyrrolidone is als...  
WO/1991/015527A1
The present invention relates to novel copolymers and contact lenses made from these copolymers comprising preformed silicone-containing acrylic star polymers and macromonomers, preparation of these contact lenses and a therapeutic metho...  
WO/1991/013919A1
This invention relates to a radiation-curable monoethylenically unsaturated liquid non-aqueous composition whereby the composition comprises an ionomeric composition comprising a monoethylenically unsaturated acid wherein at least a port...  
WO1991009067A3  
WO1991009061A3  
WO/1991/009888A1
The invention relates to copolymers with an average content of 1.25 to 30 functional groups per molecule and an average molecular weight of from 1500 to 6000 which can be produced by radical solution polymerisation at 130 to 200 �C fro...  
WO/1991/009067A2
Water-soluble, amphoteric grinding and/or dispersion agent for aqueous mineral suspensions with the formula (I) having the general form: -(A)p-(B)q-(C)r, where (A) is an anionic ethylene monomer with carboxylic function, (B) is a non-ion...  
WO/1991/009061A2
High-temperature oil-resistant elastomers are prepared from butadiene alkenylpyridine copolymers, butadiene-acrylate copolymers, and copolymers of butadiene with 1,3-dienes containing fluorine. The unsaturated olefinic backbone and penda...  
WO/1991/007449A1
Polymers comprising recurring units represented by structures (1), (2) and (3), where R?1¿, R?2¿, D, J, Y, a, b, and c are as defined herein are useful for controlling wandering of filter dyes in photographic elements.  
WO/1991/002011A1
Phosphonomethylated polyvinyl amines containing characteristic structural elements of formula (I), where R?1� is H, C�1? to C�6? alkyl or (II) and X is H, an alkali metal equivalent, ammonium equivalent or alkaline earth metal equi...  
WO/1991/002013A1
Curable bisimide compositions containing at least one biscitraconimide having general formula (I), wherein D is a divalent group, R is CH2-R1, and R1 is independently selected from hydrogen and alkyl groups having 1-18 carbon atoms; at l...  
WO/1991/001336A1
A method for producing an acidic, concentrated, polymeric emulsion that can be diluted and thereafter neutralized to provide a novel polymeric thickener is disclosed. The method comprises emulsion-polymerizing, in acidic aqueous media, a...  
WO/1991/000302A1
What is described herein is a precipitation polymerization process and terpolymer products produced thereby. Polymerization is carried out in a reaction mixture of a vinyl lactam, e.g. vinyl pyrrolidone or vinyl caprolactam, a polymeriza...  
WO/1990/014314A1
Water-soluble copolymerizates obtained by polymerization of the following characteristic monomers: (a) 99 to 50 wt.% of monoethylenically unsaturated carboxylic acids with 3 to 8 carbon atoms or their salts and (b) 1 to 50 wt.% of N-viny...  
WO/1990/013577A1
The invention relates to the production of high molecular weight vinyl lactam-quaternized amino acrylamide copolymers having less than 0.1 % residual unreacted monomer, which comprises: subjectinmg the monomers to solution polymerization...  
WO/1990/013813A1
A method and apparatus are presented for the casting of gradient gels, without voids, in confined support structures such as thin slab-type configurations. Furthermore, by using a differential activation scheme for the casting, the metho...  
WO/1990/012041A1
What is described herein is a precipitation polymerization process and copolymer products produced thereby. Polymerization is carried out in a reaction mixture of a vinyl lactam, e.g. vinyl pyrrolidone or vinyl caprolactam, and a polymer...  
WO/1990/006344A1
The invention concerns the use of copolymers containing amino groups in aqueous, water-soluble solutions as temporary coatings in paint spray booths. The compositions are obtained by the copolymerization of (a) 15-90 % by wt. of a nitrog...  
WO/1990/005131A1
The invention relates to 5-oxo-3-pyrrolidinecarboxylic acid derivatives having structural formula (I), wherein X is selected from the group (a), (b) and (c), R2 and R3 are each H or CH3, and R1 is H or a hydrocarbon radical having from 1...  
WO1990003367A3  
WO1990003368A3  
WO/1990/003406A1
The invention discloses the processes and materials for treating materials to minimize the deposition of proteins and other molecules, and for removing proteins and other molecules from materials. New copolymers containing polyethylene o...  
WO/1990/003368A2
A cross-linked polymer-supported 4-(N-benzyl-N-methylamino)pyridine material and process for its preparation in high yield and having effective physical and catalytic properties. The polymer-supported catalyst is characterized by the sus...  
WO/1990/003367A2
A cross-linked polymer-supported 4-(N-benzyl-N-methylamino)pyridine material and process for its preparation in high yield and having effective physical and catalytic properties. The polymer-supported catalyst is characterized by the sus...  
WO/1990/001920A1
The invention relates to a hydrolysis resistant, high molecular weight polymer represented by formula (I), wherein R is alkylene having from 3 to 8 carbon atoms which is optionally substituted with lower alkyl; R1 and R2 are each hydroge...  
WO/1989/008021A1
Stereolithographic method of forming a three-dimensional thin-walled object is comprised of repeatingly exposing surface of reservoir of liquid ultraviolet-curable ethylenically unsaturated material to actinic light in or near ultraviole...  
WO/1989/006246A1
Water-dilutable vinyl copolymers containing side chains contain groups (gamma) of formula -X-alk-Y-, where alk stands for alkyls with 2 to 6 carbon atoms, hydroxy-substituted alkyls with 3 to 6 carbon atoms, or alkyls with 4 to 6 carbon ...  
WO/1989/005829A1
Pressure-sensitive copolymers based on acrylic monomers are provided with high adhesive performance characteristics by the inclusion of a synergistic amount of an N-vinyl lactam monomer and a glycidyl monomer with the bulk of the monomer...  
WO/1989/003864A1
alpha-Substituted acrylic acid esters, their polymers and adhesives therefrom, and methods of synthesizing these compounds. The compounds of the invention are useful as intermediates in the synthesis of isocyanato esters and can be polym...  
WO/1989/003386A1
Ultraviolet light absorbing, polymerizable phenothiazine and azaphenothiazine monomers, copolymers thereof and articles of manufacture, including lenses, optical devices, plastic films and hydrogels, constructed therefrom.  
WO/1988/007062A1
Azlactone-functional polymer beads are useful reactive supports for the attachment of functional materials to provide novel adduct beads. The adduct beads are useful as complexing agents, catalysts, polymeric reagents, chromatographic su...  
WO/1988/007061A1
The invention relates to highly filterable polyvinyl polypyrrolidone particles and to the process for improving filterability of standard polyvinyl polypyrrolidone granules, wet cakes and slurries, which comprises heating granular polyvi...  
WO/1988/005433A1
Cross-linking reagents which are highly specific for sulphydryl groups and react with thiols at an excellent rate. The essential feature of the reagents is at least one vinyl group conjugated with an aromatic nitrogen heterocycle. Partic...  
WO/1988/003194A1
A process for making paper which comprises making paper from a pulp slurry containing a neutral sizing agent and, if necessary, a filler and containing as a paper quality improver a cationic polymer prepared by copolymerizing an acrylami...  
WO/1988/001627A1
Novel water soluble D-threo-(1,1'-dihydroxy-1-p-nitrophenylisopropyl) dichloroacetamide in a complexed state which is derived from the reaction between an N-vinyl-2-pyrrolidone copolymer and the D-threo-(1,1'-dihydroxy-1-p-nitrophenyliso...  
WO/1987/007621A1
Ionic copolymers exhibiting uniform, gel-free solution viscosity and a controllable melt viscosity and hot melt tension are prepared by copolymerizating in an oil phase a nonionic monomer (such as styrene or an alkylacrylate) with an ion...  
WO/1987/006595A1
Novel water soluble alpha-methyl-(2-methylpropyl)benzene acetic acid in a complexed state which is derived from the reaction between an N-vinyl-2-pyrrolidone copolymer and the alpha-methyl-(2-methylpropyl)benzene acetic acid and to the p...  
WO/1987/005914A1
A self-doped conducting polymer having along its backbone a pi-electron conjugated system which comprises a plurality of monomer units, between about 0.01 and 100 mole % of the units having covalently linked thereto at least one Bronsted...  
WO/1987/002041A1
A soluble acrylic copolymer is obtained by copolymerising a monomer in an amount greater than 3 to 30% of the total monomer weight and comprising at least 2 polymerisable, olefin-unsaturated double links, monomers containing functional g...  
WO/1987/000537A1
Method of producing high molecular weight copolymers from vinyl monomers such as vinylpyridine and styrene by emulsion polymerization which comprises combining the monomers with a particular surfactant, a polymerization initiator in an a...  
WO/1986/003501A1
Process for copolymerization of vinylpyrrolidone and maleic anhydride in the presence of organic solvent, catalyst and between about 0.1 and 1.0 weight % water.  
WO/1985/005222A1
An integral lightweight solar cell panel containing a plurality of interconnected solar cells bonded to a fiber-reinforced polyimide film made from an isoimide-containing precursor. The solar cells can be placed on the reinforced polyimi...  
WO/1985/002853A1
A copolymer formed from an isoimide oligomer and another compound, such as an aryl sulfone, each of which has reactive functional terminal groups, such as ethylenic or acetylenic groups. The isoimide oligomer is soluble in the other comp...  
WO/1983/002449A1
In order to facilitate drilling in oil-bearing grounds by means of chemical fluids, aqua-soluble polymers are used as lubricant fluid additives in the drilling wells, said aqua-soluble polymers having the following statistic distribution...  

Matches 451 - 500 out of 4,139