Crosslinking fluids and methods configured for delaying gel crosslinking of the crosslinking fluid are provided. The crosslinking fluids and methods comprise mixtures of at least one crosslinking polymer, at least one crosslinker configured for crosslinking the at least one crosslinking polymer, at least one crosslink delay trigger configured for initiating crosslinking at a predetermined pH value and comprising at least one low reactivity magnesium oxide, and polar protic solvent. The at least one low reactivity magnesium oxide is produced by calcination of magnesium carbonate ore or magnesium hydroxide ore at a calcining temperature of at least 1,000° C.

A sheet includes: a composition comprising about (60) to about (85) weight percent of polyphenylene, about (0) to about (10) weight percent of polystyrene, about (10) to about (20) weight percent of a hydrogenated block copolymer of an alkenyl aromatic compound and a conjugated diene, about (3) to about (10) weight percent of an aryl salicylate, and optionally, a flame retardant additive.

A method for producing a polyurethane elastic fiber according to the present invention contains the steps of: [1] producing a polyurethane urea polymer (A) having a number average molecular weight ranging from 12,000 to 50,000, and represented by general formula (1); [2] preparing a spinning dope by adding the polyurethane urea polymer (A) to a polyurethane urea polymer (B); and [3] spinning a polyurethane elastic fiber using the spinning dope.

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In the formula, R.sup.1 and R.sup.2 are an alkyl group or a hydroxyalkyl group, R.sup.3 is an alkylene group, a polyethyleneoxy group or a polypropyleneoxy group, R.sup.4 is a diisocyanate residue, X is a urethane bond or a urea bond, R.sup.5 and R.sup.6 are a diisocyanate residue, P is a diol residue, Q is a diamine residue, UT is a urethane bond, UA is a urea bond, each of k, 1, m and n is 0 or a positive number.

A polyurea additive is provided that strengthens a given base sheet molding composition (SMC) An isocyanate containing species and an amine containing species are introduced into an uncured polymeric resin of a sheet molding compound (SMC) under conditions suitable for the formation of a polyurea polymer network. Upon cure of the SMC base resin, an interpenetrating network is formed that is stronger than the base SMC absent the polyurea. As a result, an article is formed from the SMC that is stronger at the same dimensions than a conventional article or thinned to achieve the same properties to obtain a lightweight article compared to that formed from conventional SMC. The properties of the article are also attractive relative to aluminum for the formation of vehicle body and exterior panels.

Biocompatible ink formulations are described herein. In one example, a biocompatible ink formulation includes an ink base and a biocompatible component that, when mixed with the ink base to form the biocompatible ink formulation and subject to curing via ultraviolet light, causes the biocompatible ink formulation to be white.

Disclosed herein are polymer compositions comprise at least one thermoplastic polymer and dispersed therein core/shell particles, wherein the core/shell particles comprise MgTiO.sub.3 core and SiO.sub.2 shell.

The invention relates to a process for depolymerization of polymer compositions with decomposition of halogen-containing organic compounds, wherein the polymer composition contains at least one styrene-containing polymer and at least one halogen-containing organic compound. The addition of one or more inorganic basic compounds in the depolymerization simultaneously promotes the decomposition of the halogen-containing organic compound and favors the depolymerization.

A superabsorbent-based suspension for hydrostimulatory coating of seeds comprises a superabsorbent in the form of a copolymer of acrylate and acrylamide in the range of 25 to 40 wt. % of the suspension, adhesives dispersed or dissolved in a solution of water and ethanol and/or of water and isopropanol, wherein the dispersion or solution of the adhesives comprising water in the range of 0.1 to 8 wt. % of the suspension, ethanol and/or isopropanol in the range of 40 to 70 wt. % of the suspension and adhesives in the range 1-10 wt. % of the suspension, further lubricant additives suitable for improving flow properties of seeds in the range of 0.1 to 15 wt. % of the suspension, and an antistatic additive suitable for eliminating electric charge in the range 0.1-5 wt. % of the suspension. A method of coating a seed with this suspension.

A superabsorbent-based suspension for hydrostimulatory coating of seeds comprises a superabsorbent in the form of a copolymer of acrylate and acrylamide in the range of 25 to 40 wt. % of the suspension, adhesives dispersed or dissolved in a solution of water and ethanol and/or of water and isopropanol, wherein the dispersion or solution of the adhesives comprising water in the range of 0.1 to 8 wt. % of the suspension, ethanol and/or isopropanol in the range of 40 to 70 wt. % of the suspension and adhesives in the range 1-10 wt. % of the suspension, further lubricant additives suitable for improving flow properties of seeds in the range of 0.1 to 15 wt. % of the suspension, and an antistatic additive suitable for eliminating electric charge in the range 0.1-5 wt. % of the suspension. A method of coating a seed with this suspension.

A power transmission V-belt includes a tension member, an adhesion rubber layer in which at least part of the tension member is embedded, and a tension rubber layer and a compression rubber layer stacked via the adhesion rubber layer. A rubber hardness of the tension rubber layer is smaller than a rubber hardness of the compression rubber layer. In the adhesion rubber layer, a rubber hardness on a tension rubber layer side relative to the tension member is smaller than a rubber hardness on a compression rubber layer side.