摘要:
Processes for the preparation of random-fiber thermoset composite sheets by employing a latent curing agent thermoset resin formulation or a coreactant thermoset system such that uncured thermoset composite sheets are formed which can be subsequently formed and cured into articles of manufacture.
摘要:
A process for preparing a high strength composite by (A) mixing (1) an aqueous slurry of negatively charged, water-insoluble natural or synthetic fiber such as cellulose fiber, (2) a latex having a high density of pH independent cationic charges, such as sulfonium, bound at or near the particle surface, (3) a water-soluble, high molecular weight anionic polymer co-additive, such as a hydrolyzed polyacrylamide and optionally (4) conventional wet end additives; (B) draining water from the resulting aqueous suspension; (C) drying by heating.
摘要:
A process for preparing substantially linear water-soluble interpolymeric interfacially spreading polyelectrolytes, such process comprising (1) a homogeneous polymerization in an aqueous emulsion of a mixture of ethylenically unsaturated nonionic monomers wherein at least one of such monomers contains a reactive group and wherein the polymerization reaction forms an interpolymer containing nonionic functional groups, then (2) adding a coreactant compound to the aqueous emulsion in an amount sufficient to convert the interpolymer to a water-soluble polyelectrolyte having a charge which is the same as the charge of the emulsion of (1) above.
摘要:
An aqueous dispersion containing a water-insoluble, essentially electrically non-conductive, organic polymer as cation-active particles wherein a substantial portion of the cation-activity is provided by isothiouronium cations may be obtained by various methods including emulsion polymerization of hydrophobic monomers using an isothiouronium surfactant or by emulsion copolymerization of a monomer containing isothiouronium groups with hydrophobic monomers.
摘要:
This invention is directed to dispersions containing stabilizing amounts of certain substantially linear interpolymeric interfacially spreading polyelectrolytes composed of a mixture of nonionic hydrophobic units and ionic hydrophilic units where the nonionic units are randomly distributed in the backbone of the polyelectrolyte and where the polyelectrolyte is adsorbed at the surface of the disperse phase of the dispersion in a substantially flat configuration. The polyelectrolytes are further characterized by having an adsorption constant equal to or greater than 1 at the point where the surface of the disperse phase is saturated with the polyelectrolyte, the absorption constant being determined as the amount of polyelectrolyte in the disperse phase divided by the amount of polyelectrolyte in the continuous phase. These stabilized dispersions are particularly useful as coating compositions and for use in the preparation of microspheres and seed latexes.
摘要:
Novel optical devices, methods and systems relating to the detection of glucose, and more particularly to real-time glucose monitoring, are disclosed herein. More particularly, various hardware and methodological means are disclosed for ratiometric correction of optical glucose measurements for artifacts of optical systems.
摘要:
Novel pyridinium salts functionalized with boronic acid and methods of making them are disclosed. When combined with a fluorescent dye, the compounds are useful in the detection of polyhydroxyl-substituted organic molecules.
摘要:
In preferred embodiments, the present invention relates to methods for polymerizing a monomer solution within a cavity covered by a porous membrane to generate a smooth polymer surface. More specifically, the method can be used to provide a medical device or sensor with a smooth polymer surface.
摘要:
The present invention concerns an improved optical method and optical sensing device for determining the levels of polyhydroxyl-substituted organic molecules in vitro and/or in vivo in aqueous media. The range of detection is between about 400 and 800 nm. In particular, a sensory devise is implemented in a mammal to determine sugar levels. Specifically, a dye is combined with a conjugated nitrogen-containing heterocyclic aromatic boronic acid-substituted bis-onium compound in the presence of a sugar, such as fructose or glucose. The viologens are preferred as the aromatic conjugated nitrogen-containing boronic acid substituted compounds. The method is useful to determine sugar levels in a human being.
摘要:
The present invention further provides a substantially non-aqueous agricultural pesticide concentrate formulation of a non-ionic surfactant and a amphipathic graft copolymer composition in admixture with a water-insoluble organic agricultural pesticide which concentrate formulation can be easily diluted with water to form non-settling, freeze-thaw stable formulations. The present invention further provides methods for the use of water-diluted agricultural pesticide concentrate formulations of the above non-ionic surfactant concentrate formulations in the kill and control of agricultural pest.