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7589157 |
Multi-arm block copolymers as drug delivery vehicles
The invention provides methods for making copolymers and multi-arm block copolymers useful as drug delivery vehicles. The multi-arm block copolymers comprise a central core molecule, such as a...
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7550539 |
Partially neutralized chlorosulfonated polyolefin elastomers
At least partially neutralized chlorosulfonated ethylene/alpha-olefin elastomers containing 0.5-10 weight percent chlorine and 0.25 to 5 weight percent sulfur are prepared from...
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7524901 |
Recyclable isotactic polypropylene
An easily recyclable cross-linked isotactic polypropylene that is additionally miscible with polyethylene is formed from a chemical reaction of combining a polymer, sulfur, peroxide, an...
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7517942 |
Method to make reversibly cross-linked isotactic polypropylene
A method for preparing reversibly cross-linked isotactic polypropylene having a degree of crystallinity substantially identical to a degree of crystallinity of a starting polypropylene by mixing in...
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7309744 |
Article formed from cross-linking isotactic polymers in the presence of peroxide
An article of manufacture made of an isotactic polymer, a cross-linking agent, and an accelerator. The cross-linking agent includes a peroxide and a sulfur. The peroxide has an activity ranging...
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7265186 |
Multi-arm block copolymers as drug delivery vehicles
The invention provides methods for making copolymers and multi-arm block copolymers useful as drug delivery vehicles. The multi-arm block copolymers comprise a central core molecule, such as a...
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7262253 |
Process for the preparation of amphiphilic poly (N-vinyl-2-pyrrolidone) block copolymers
The instant invention provides a two-step polymerization process for preparing amphiphilic poly(N-vinyl-2-pyrrolidone), (PVP)-block-polyester copolymers and other diblock and triblock copolymers...
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7258904 |
Absorber and method for producing it
According to the present invention, a water absorbent material and materials to be sucked included in a water permeable bag type member form a water absorber. Thus, the water absorber is small both...
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7241844 |
Method for cross-linking isotactic polymers in the presence of peroxide
A method for making isotactic polymer using a cross-linking agent entails introducing the cross-linking agent to a polymer and an accelerator. The cross-linking agent includes a peroxide and a...
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7132482 |
Method for vulcanizing caoutchouc or latex by applying a mixture of sulfur and a complexing agent
The invention relates to a method for vulcanizing caoutchouc or latex by adding a mixture M which contains a component a) from a1) 20 to 96% by weight of sulfur, a2) 4 to 80% by weight of a...
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6987149 |
Isostatic polypropylene crosslinking in the presence of peroxide
This invention concerns the crosslinking of isotactic polypropylene, which has always been considered a non-crosslinkable polymer. Isotactic polypropylene crosslinking not only generates new uses...
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6977102 |
Absorber and method of manufacturing the absorber
According to the present invention, a water absorbent material and materials to be sucked included in a water permeable bag type member form a water absorber. Thus, the water absorber is small both...
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6727323 |
Process for reducing odor emission in aqueous polymer dispersions and in polymer powders
A process for reducing odor emission in aqueous polymer dispersions and in polymer powders comprises admixing an aqueous dispersion of a polymer obtained by free-radical polymerization of one or...
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6703446 |
Hetero-telechelic polymers and processes for making same
Hetero-telechelic polymers having the formula: FG—(Q) d —Z—J—[A(R 1 R 2 R 3 )] x (I) wherein FG is a protected or non-protected functional group; Q is a saturated or unsaturated...
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6617390 |
Method of making synthetic hydrophilic polymers and products resulting therefrom
The present invention involves a method of making a multiblock copolymer containing two or more types of sequences of derivatives of acrylic acid with at least one derivative being acrylic acid...
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6559237 |
Sulfonated perfluorocyclobutane ion-conducting membranes
Disclosed are sulfonated aromatic perfluorocyclobutane polymers meeting a condition selected from: a) the equivalent weight of the polymer is 5000 or less, and b) the proton conductivity of the...
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6512051 |
Elastomer composition
An elastomer composition including an elastomer having a functional group, and a compound having a functional group, in which corresponding functional groups form a cross-link by at least one of an...
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6476152 |
Method of preparation of products which absorb water intermolecularly
A method of crosslinking polystyrene polymers and co-polymers for the formation of macroreticular materials of an Mc 30,000 to 50,000 is described. The materials forming an insoluble gel which is...
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6350797 |
Use of cyclic sulfur silanes as coupling agents in sulfur-vulcanizable, silica-reinforced tire rubber compositions
New sulfur-vulcanizable, silica-reinforced tire rubber compositions and tires and tire parts, vulcanized and unvulcanized, made employing them are made with coupling agent compositions comprising a...
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6300421 |
Preparation of peroxide vulcanized rubber composition and articles having at least one component thereof
The invention relates to preparation of EPDM-based and EPR-based rubber compositions which are vulcanized with peroxide together with a specified combination of sulfur and acrylate co-agents. The...
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6281296 |
Curable perfluoroelastomer composition
Perfluoroelastomer compositions comprising perfluoroelastomers having copolymerized units of tetrafluoroethylene, a perfluoro(vinyl ether), and a nitrile-containing cure site monomer are cured with...
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6232406 |
Hydrogel and method of making
The present invention is a method of making acrylonitrile copolymers having multi block structure comprising acrylic acid, acryl amids and acrylamidine hydrophilic groups in hydrophilic blocks and...
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6221991 |
Methacrylate and acrylate polymers and processes for making same
Polar polymers having the following formula: FG-(Q) d -R n -Z-J-[A(R 1 R 2 R 3 )] x (I) wherein FG is H or a protected or non-protected functional group; Q is a polar hydrocarbyl group...
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6066690 |
Heat-vulcanizable rubber composition
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6051659 |
Highly sensitive positive photoresist composition
Positive resists sensitive to UV, electron beam, and x-ray radiation which are alkaline developable are formulated from a polymer material comprising recurrent structures having alkaline soluble...
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5849847 |
Telechelic polystyrene/polyethylene copolymers and processes for making same
Polyalkenylaromatic-polyethylene copolymers are prepared using protected functional organolithium initiators. Polymerization of an alkenylsubstituted aromatic monomer followed by ethylene, results...
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5849828 |
Metalation and functionalization of polymers and copolymers
There is provided a method of introducing functionality into a copolymer of an isoolefin and an alkylstyrene at the alkylbenzyl carbon atom comprising the steps of: forming a solution of said...
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5827929 |
Functionalized initiators for anionic polymerization
A process for the preparation of hydrocarbon solutions of monofunctional ether initiators of the following general structure: M--Z--O--C(R 1 R 2 R 3 ) wherein M is an alkali metal; Z is a...
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5792815 |
Functionalized polymer produced with functionalized initiators by anionic polymerization
A process for the preparation of hydrocarbon solutions of monofunctional ether initiators of the following general structure: M--Z--O--C(R 1 R 2 R 3 ) wherein M is an alkali metal; Z is a...
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5721279 |
Manufacture of cation exchange resins by pressurized sulfonation
Cation exchange resins are prepared by sulfonating copolymer beads in the presence of a swelling solvent under pressure. Pressure sulfonation shortens cycle times and requires less energy while...
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5696195 |
Solutions of perfluorinated polymers in SF.sub.6 with or without CO.sub.2
Perfluorinated polymers are dissolved in supercritical carbon dioxide and/or sulfur hexafluoride at elevated temperatures and pressures. The solutions are useful for making foams, spun-bonded or...
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5696193 |
Immunoassay elements comprising polymers containing vandium IV (V+4) ions
A dry immunoassay analytical element, for assaying a ligand, comprising in the following order: (a) a layer containing a labeled ligand; (b) a spreading layer; (c) a receptor layer...
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5658995 |
Copolymers of tyrosine-based polycarbonate and poly(alkylene oxide)
Random block copolymers having the formula: ##STR1## wherein R 1 is --CHCH-- or (--CH 2 --) j , in which j is zero or an integer from one to eight; R 2 is selected from hydrogen, straight and...
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5637627 |
Method for producing a spherical ion exchange resin
A method for producing a spherical crosslinked copolymer, which comprises polymerizing a monofunctional addition-polymerizable monomer and at least 0.5% by weight of a polyfunctional...
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5629386 |
Halomethylation of polymer
A process is provided for the halomethylation of the aromatic groups in an isoolefin-vinylidene aromatic monomer polymer by the in situ generation of the halomethylating species formed by the...
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5624988 |
Process for the production of polymer-bound rubber chemicals
Process for the production of polymer-bound rubber chemicals, characterized in that the rubber chemicals and optionally additives are finely dispersed in a low molecular weight polymerizable...
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5594073 |
Dialkylthiourea cured elastomeric roofing composition
Disclosed are ambient temperature-curable roofing compositions and ambient temperature-curable sheeting compositions, both of which include an elastomer or elastomer mixture such as...
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5522842 |
Absorbable Ε-caprolactone polymers as suture coatings displaying auto catalyzed hydrolysis
Crystalline, low melting ε-Caprolactone polymers which undergo accelerated hydrolysis for use, for example, as absorbable coatings for surgical sutures; the polymers bearing basic amine...
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5470919 |
Chlorinated ethylene/α-olefin copolymer rubber and composition containing the same
A chlorinated ethylene/α-olefin copolymer rubber which is a chlorinated product of an ethylene/α-olefin copolymer rubber having a vinylidene bond at the terminal of the molecule, the number of...
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5395896 |
Metal scavengers and processes for the production thereof
The present invention is intended to provide a metal scavenger that is free from the defects of metal scavengers formed by introducing dithioic acid groups to polyalkylenepolyamines or the like, is...
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5376438 |
Multilayer tire sidewall
The invention is a multilayer tire sidewall having an outer layer prepared from a blend of isomonoolefin/para-alkylstyrene copolymer and general purpose rubbers. The inner layer comprises general...
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5328963 |
Sulfur vulcanized rubber compounds containing maleamic acid
The present invention relates to a sulfur vulcanized rubber composition containing 0.1 to 10.0 phr of an oligomeric maleimide of the formula: ##STR1## or a maleamic acid of the formula: ##STR2##...
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5310815 |
Polymers derived from a conjugated diolefin, a vinyl-substituted aromatic compound, and olefinically unsaturated nitrile
The present invention relates to a polymer resulting from the copolymerization of at least three monomers. From about 40 to 84 weight percent of the polymer is derived from a conjugated diolefin,...
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5242988 |
Process for chlorination and chlorosulfonation of olefin polymers in the presence of fluorinated surfactants
Polymer agglomeration is prevented in chlorinations and chlorosulfonations of olefin polymers performed in perfluorinated media by addition of fluorinated surfactants.
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5225493 |
Anionic polymerization process
A process for anionic polymerization of polymerizable monomers with an organo lithium initiator followed by polymerization termination characterized in that terminated reaction products are...
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5212251 |
Alkali-resistant core-shell polymers
Alkali-resistant core-shell polymers having an acid-insoluble core and an acid-soluble shell are prepared by sequential emulsion polymerization of a monomer mixture having acid-ionizable...
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5185401 |
Monofunctional polymers of olefins and block copolymers obtained therefrom
Functional polyolefins containing a terminal functional group; the block copolymers that can be obtained from such polyolefins by reaction with polymers reactive with the functional groups and the...
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5171789 |
Poly(oxydiphenylamines)
The present invention relates to poly(oxydiphenylamines) of the formula: ##STR1## wherein n is an integer ranging from about 1 to 100. The poly(oxydiphenylamines) are useful as a rubber additive...
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5151469 |
Method of preparing elastomers having reduced hysteresis properties with sulfoxides
A method of preparing an elastomer having reduced hysteresis properties comprises the steps of reacting an anionic polymer having at least one functional site, with about one equivalent of a...
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5132395 |
Polyimide resins prepared by addition reactions
Polyimides having a high thermal and oxidative stability are prepared by reacting a mixture of monomers comprising (a) a dialkyl, trialkyl, or te This invention was made with Government support...
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