1995 results about "Thiokol" patented technology

A poly(ethylene glycol) derivative is disclosed that is activated with a sulfone moiety for selective attachment to thiol moieties on molecules and surfaces. The activated PEG is water soluble, hydrolytically stable for extended periods, and forms hydrolytically stable linkages with thiol moieties. The linkages generally are not reversible in reducing environments. The PEG derivative is useful for modifying the characteristics of substances including modifying biologically active molecules and surfaces for biocompatibility. Methods for synthesizing the active PEG and for preparing conjugates of the active PEG and other substances, including biologically active substances, are also disclosed.

A process for obtaining a grafted diene elastomer having functional groups along the chain, a rubber composition containing this grafted elastomer and having in particular improved hysteresis properties in the cross-linked state, a preparation process for this composition, a tire tread made from this composition and a tire of reduced rolling resistance which incorporates this tread. A process for obtaining this grafted elastomer includes a radical grafting reaction carried out in solution or without a solvent by means of a reagent of the mercaptan type to graft functional groups on to the chain of a starting elastomer. The starting elastomer is treated with an antioxidant having at least one aromatic amine function before the grafting reaction, so that the grafted elastomer has a macrostructure which is practically identical to that of the starting elastomer. A rubber composition containing the grafted diene elastomer includes a reinforcing inorganic filler, and the grafted elastomer preferably has a molar ratio of units originating from conjugated dienes greater than 30%.

Provided is a composition comprising an aromatic material selected from a polythiol aromatic compound or resin, a hydroxythiophenol compound or resin, a catechol novolak resin, a catechol cresol novolak resin, a polyhydroxy aromatic resin or compound comprising at least one aromatic ring having at least one hydroxyl group attached directly to the aromatic ring wherein at least one hydroxyl group is a phenolate salt, or a combination thereof, and a salt former compound capable of forming a salt with the aromatic material, a fluoropolymer, and optionally a phase transfer catalyst. Also provided are articles comprising powder-coated fluoropolymers with aromatic compounds, and methods for making the compositions and articles.

The invention discloses a dark blue organic light-emitting material and a preparation method and application thereof. The dark blue organic light-emitting material contains a structural unit disclosedin the invention, wherein, M is B or Bi; X is O, S or NR4; R1-R4 are independently selected from connecting bonds or groups obtained from H-H, H-F, H-O-H, H-S-H, H-CN, saturated hydrocarbons, unsaturated hydrocarbons, fluorinated hydrocarbons, heterocyclic compounds, organoboron, organosilicone, alcohols, mercaptans, ethers, thioethers, phenols, thiophenol, aldehydes, ketones, amines, amides, nitriles or sulfones losing one or more H; R1-R3 are located at any substitution position on rings of the structural unit where R1-R3 are located, and the bond energy between the ring where R3 is locatedand M is greater than or equal to the bond energy between the ring where R2 is located and M. The dark blue organic light-emitting material containing the B / Bi-N main body structure has very narrow light-emitting spectrum and TADF properties; the color purity is high, and the stability is good.

The present invention provides a formulation comprising:i) a lipid matrix;ii) at least one thiolated antioxidant;iii) optionally at least one bioactive agent; andiv) optionally at least one chelating agent.

The invention provide a class of actinically-crosslinkable silicone-containing prepolymers obtained by functionalizing an intermediary copolymer to have two or more thiol or ethylenically-unsaturated groups covalently attached thereto, wherein the intermediary copolymer is an atom-transfer radical polymerization (ATRP) product of a reactive mixture comprising a polysiloxane ATRP macroinitiator and at least one hydrophilic vinylic monomer. The present invention is also related to silicone hydrogel contact lenses made from a prepolymer of the invention and methods for making the contact lenses in a cost-effective way and with high consistency and high fidelity to the original lens design.

The disclosure herein relates to organofunctional silanes and mixtures of organofunctional silanes possessing mercaptan and hydrocarbyl and / or heterocarbyl functionality. These silanes reduce or eliminate the generation of volatile organic compounds (VOC's) during use, aid in the processing of filled elastomeric materials and enhance the end-use properties of the filled elastomer. The present disclosure relates to the processes of making a composition of these silanes.

A stamp is comprised of a thiol-ene polymer, wherein the thiol-ene polymer allows for creation of micro-scale or nano-scale patterns useful in soft or imprint lithography. A patterned thiol-ene polymer is fabricated by casting a thiol-ene mixture onto a patterned mold, curing the thiol-ene mixture to form the patterned thiol-ene polymer, and peeling off the patterned thiol-ene polymer from the silicon mold. A stamp comprised of a thiol-ene polymer may be replicated by exposing the to oxygen plasma to form a hydrophilic mold, exposing the hydrophilic mold to a fluorinating agent under vacuum conditions to form a functionalized surface of the hydrophilic mold, casting a thiol-ene mixture on top of the functionalized surface, photocuring the thiolene mixture to form a replica thiol-ene polymer, and peeling off the replica thiol-ene polymer.

The invention discloses an antibacterial and low-odor decorative polypropylene material used in a saloon car and a preparation method thereof, wherein the material comprises the following components in percentage by weight: 60 to 80 percent of polypropylene, 1 to 20 percent of elastic body, 10 to 30 percent of talcum powder, 1 to 5 percent of photocatalytic micro-powder, 0.5 to 2.0 percent of antibacterial agent, and 0.3 to 1.0 percent of odor absorbent. The polypropylene material can keep low odor enduringly, has antibacterial and mould-proof functions, and has the advantages of strong bactericidal power, quick disinfectant effect, good durability, good stability, no secondary pollution and the like. According to the invention, odorous small molecules such as paraffin, olefins, arenes, amine, phenol, thiol, peroxide, aldehydes, ketones and the like can be effectively removed.

The present invention provides a carbon black dispersion composition for a color filter black matrix resist composition, containing (A) a carbon black having specified physical properties (average primary particle diameter, concentration of surface carboxyl groups), (B) a copolymer having an amino group and / or its quaternary ammonium salt, and (C) an organic solvent, and a color filter black matrix resist composition that contains the above-mentioned dispersion composition, (D) a binder resin having a carboxyl group, (E) an ethylenically unsaturated monomer, (F) a photopolymerization initiator, and (G) specified multifunctional thiol compound and can easily form a thin film or pattern having high light-shielding property by photolithographic method pattern, has excellent storage stability, and exhibits sufficient sensitivity and resolution.

The invention provides a polishing composition and a method of chemically-mechanically polishing a substrate comprising a noble metal, the polishing composition comprising (a) an oxidizing agent that oxidizes a noble metal, (b) an anion selected from the group consisting of sulfate, borate, nitrate, and phosphate, and (c) a liquid carrier. The invention further provides a polishing composition and a method of chemically-mechanically polishing a substrate comprising ruthenium, the polishing composition comprising (a) an oxidizing agent that oxidizes ruthenium above the +4 oxidation state, (b) a polishing additive selected from the group consisting of metal sequestering polymers, metal chelators, organic thiols, compounds that reduce ruthenium tetraoxide, lactones, and α-hydroxycarbonyl compounds.

The present invention is directed to a pneumatic tire having a tread comprising a radially outer cap layer and radially inner cap layer underlying the outer cap layer; the outer cap layer comprising a vulcanizable rubber composition comprising, based on 100 parts by weight of elastomer (phr), from about 50 to about 90 phr of a solution polymerized styrene-butadiene rubber having a glass transition temperature (Tg) ranging from −65° C. to −55° C. and functionalized with an alkoxysilane group and at least one functional group selected from the group consisting of primary amines and thiols; from about 50 to about 10 phr of polybutadiene having a cis 1,4 content greater than 95 percent and a Tg ranging from −80 to −110° C.; from 30 to 80 phr of a combination of a resin having a Tg of at least 30° C. and an oil, wherein the weight ratio of resin to oil is greater than 1; and the inner cap layer comprising a vulcanizable rubber composition comprising: from about 50 to about 90 phr of a solution polymerized styrene-butadiene rubber functionalized with an alkoxysilane group and at least one functional group selected from the group consisting of primary amines and thiols; from about 50 to about 10 phr of polybutadiene having a cis 1,4 content greater than 95 percent and a Tg ranging from −80 to −110° C.; and from 30 to 50 phr of an oil, and essentially free of a resin.

This invention relates to methods and compositions for preparation of silk-PEGs based biomaterials through crosslinking by chemically reacting active polyethylene glycols (PEGs) possessing different chemical groups (e.g., thiols and maleimides functionalized PEGs) that are additionally stabilized by the beta-sheet formation of silk fibroin. The crosslinked silk-PEGs biomaterials present strong adhesive properties, which are comparable to or better than the current leading PEG-based sealant, depending on the silk concentration in the silk-PEGs biomaterials. In addition, the silk-PEGs based biomaterials are cytocompatible, show decreased swelling behavior and longer degradation times, which make them suitable for hemostatic applications where the current available tissue sealant products can be contraindicated.

The invention provide a new class of silicone-containing prepolymers containing poly(oxyalkylene) blocks, polysiloxane blocks, and actinically-crosslinkable groups which are acryl groups, thiol groups, ene-containing groups or combinations thereof. A prepolymer of the invention is prepared in a one-pot procedure according to the Michael addition of thiol to electron deficient alkenes, such as α,β-unsaturated carbonyl compounds, without need for additional reaction step(s) to introduce actinically crosslinkable groups. The present invention is also related to silicone hydrogel contact lenses made from this class of silicone-containing prepolymers and to methods for making the silicone hydrogel contact lenses.

The invention provides a method for polishing one or more layers of a multi-layer substrate that includes a first metal layer and a second layer comprising (i) contacting the first metal layer with a polishing system comprising a liquid carrier, at least one oxidizing agent, at least one polishing additive that increases the rate at which the system polishes at least one layer of the substrate, wherein the polishing additive is selected from the group consisting of pyrophosphates, condensed phosphates, phosphonic acids and salts thereof, amines, amino alcohols, amides, imines, imino acids, nitriles, nitros, thiols thioesters, thioethers, carbothiolic acids, carbothionic acids, thiocarboxylic acids, thiosalicylic acids, and mixtures thereof, and a polishing pad and / or an abrasive, and (ii) polishing the first metal layer with the system until at least a portion of the first metal layer is removed from the substrate.

A vulcanizable rubber composition is presented that comprises an elastomer; a reinforcing filler selected from silica, carbon black, and mixtures thereof, a cure agent; and an amino alkoxy-modified silsesquioxane (AMS) comprising one or more compounds selected from the group consisting of an amino AMS, an amino / mercaptan co-AMS, an amino / blocked mercaptan co-AMS, mixtures thereof, and weak acid-neutralized solid and aqueous solutions thereof. Addition of such compounds to the rubber composition provides improved dynamic viscoelastic and mechanical properties of the vulcanized rubber compound and predict that tire components, especially tread stocks, will provide tires having improved snow traction, lower rolling resistance but equal wet traction, increased rebound, decreased hysteresis, and a general improvement in tire performance.

A functionalized poly(arylene ether) having a pendant carbon—carbon double bond is prepared by reacting the hydroxy end group of a poly(arylene ether) with a polyisocyanate compound to produce a urethane-capped poly(arylene ether) having pendant isocyanate functionality, which is then reacted with a polyfunctional compound having a carbon—carbon double bond and a hydroxy, thiol, or amino group. The functionalized poly(arylene ether) is useful as a component of a curable composition in which its carbon—carbon double bond copolymerizes with one or more olefinically unsaturated comonomers.