Provided is a release agent for vulcanized rubber molding, the release agent exhibiting good mold releasability between a mold and a rubber after vulcanization and capable of being easily removed after production. The release agent for vulcanized rubber molding contains a polyoxyalkylene glyceryl ether (A). The polyoxyalkylene glyceryl ether (A) contains 50% to 95% by mass of oxyethylene groups in 100% by mass of oxyalkylene groups. The polyoxyalkylene glyceryl ether (A) preferably has a number-average molecular weight of 2,000 to 20,000.

The present inversion provides a low corrosion external release agent for ligno-cellulose composite panels comprising two or more anionic surfactants selected from the following groups where at least one of the anionic surfactants is selected from a) or b): an ethoxylated phosphate ester or a salt thereof having the formula ##STR00001## wherein, R, R.sup.1 and R.sup.2 are independently selected from the group consisting of H, and C6-C30 alkyl having an average of 1-20 moles of ethoxylation, with the proviso that at least one of R, R.sup.1 and R.sup.2 is H and the other one or two of R, R.sup.1 and R.sup.2 is C6-C30 alkyl haying an average of 1-20 moles of ethoxylation, and b) a phosphate ester or a salt thereof haying the formula. ##STR00002## wherein, R.sup.3, R.sup.4 and R.sup.5 are independently selected from the group consisting of H, and C6-C18 alkyl Chain, with the proviso that at least one of R.sup.3, R.sup.4 and R.sup.5 is H and the other one or two of R.sup.3, R.sup.4 and R.sup.5 is C6-C18 alkyl chain, and c) an organic sulfur containing anionic surfactant or a salt thereof.

The present application discloses a polyol system for preparing polyurethane comprising: i) at least one active chain extender having at least two groups that can react with an isocyanate, wherein at least one group that can react with an isocyanate is free primary NH2 group; ii) at least one active chain extender having three groups that can react with an isocyanate, wherein at least one group that can react with an isocyanate is free primary OH group, and iii) at least one polyether polyol starting from an amine. The polyol system according to the present disclosure is phase-stable without layering and capable of releasing mold quickly after reacting with an isocyanate to produce polyurethane.

A two-component curable epoxy resin system including a dye solution. The resin system includes an epoxy resin component containing at least 80% by weight of a polyglycidyl ether of a polyphenol. The system also includes a hardener mixture containing mainly polyethylene tetraamines. The system includes triethylene diamine in specific amounts as a catalyst. The system has beneficial curing characteristics with desired color that make it useful for producing fiber-reinforced composites in a resin transfer molding process.

The present invention describes the production of wood panel boards, or the like, in which a surface modifying agent is mixed with a polyol to prepare a stable surface modifying agent polyol composition. The resultant composition is reacted with an isocyanate, and in particular, a polymeric di-isocyanate resin, in the presence of wood chips, fibers or the like, for the production of lignocellulosic based panels, such as oriented strand board (OSB), MDF, HDF and particle board panel products. In use, the surface modifying agent polyol composition is mixed with the polymeric di-isocyanate resin and the resultant mixture is applied to a lignocel-lulosic material, such as wood chips or fibers, immediately prior to hot pressing of the mixture to produce the panels. Sticking of the panels to the metal press belts or press plates typically used during production, is reduced or eliminated.

Embodiments relate to a polymerizable composition comprising a phosphorus-based mold releasing agent for an optical use whose preparation process is improved, and a process for preparing the phosphorus-based mold releasing agent. The phosphorus-based mold releasing agents can be prepared more easily and conveniently by using phosphorous pentoxide, which can easily react with a monoalcohol and/or water at room temperature in the absence of a catalyst or a solvent. In addition, byproducts are not generated during the reaction. Thus, when a lens is produced by using the mold release agent obtained therefrom, it is possible to prevent a defective appearance of the lens that may be caused by byproducts, thereby further enhancing the appearance properties thereof. Further, since separate steps for removing byproducts, specifically, such steps as washing and filtration, are not required, wastewater is not generated. Thus, it is not only environmentally friendly, but the production cost can also be reduced as the process is simple.

A silicone rubber composition comprises: (A) an organopolysiloxane having at least two alkenyl groups in a molecule and free of an aryl group; (B) (B-1) an organosiloxane having in a molecule at least one aryl group, at least one silicon-bonded hydrogen atom, and free of an alkenyl group, or a mixture of components (B-1) and (B-2) an organosiloxane having in a molecule at least one aryl group and at least one alkenyl group; (C) an acrylic compound or a methacrylic compound; (D) an organopolysiloxane having at least two silicon-bonded hydrogen atoms in a molecule and free of an aryl group and an alkenyl group; and (E) a hydrosilylation reaction catalyst. The silicone rubber composition exhibits excellent adhesive properties with respect to diverse organic resins it comes into contact with during its cure, and at the same time possesses excellent mold-release properties with respect to metal dies used for its molding.

The present inversion provides a low corrosion external release agent for ligno-cellulose composite panels comprising two or more anionic surfactants selected from the following groups where at least one of the anionic surfactants is selected from a) or b):

an ethoxylated phosphate ester or a salt thereof having the formula

##STR00001##

wherein,

R, R.sup.1 and R.sup.2 are independently selected from the group consisting of H, and C6-C30 alkyl having an average of 1-20 moles of ethoxylation,

with the proviso that at least one of R, R.sup.1 and R.sup.2 is H and the other one or two of R, R.sup.1 and R.sup.2 is C6-C30 alkyl haying an average of 1-20 moles of ethoxylation, and

b) a phosphate ester or a salt thereof haying the formula.

##STR00002##

wherein,

R.sup.3, R.sup.4 and R.sup.5 are independently selected from the group consisting of H, and C6-C18 alkyl Chain,

with the proviso that at least one of R.sup.3, R.sup.4 and R.sup.5 is H and the other one or two of R.sup.3, R.sup.4 and R.sup.5 is C6-C18 alkyl chain, and

c) an organic sulfur containing anionic surfactant or a salt thereof.

The invention relates to a method for producing the isomers 1,3- and/or 1,4-xylylene diisocyanates by reacting the corresponding 1,3- and/or 1,4-xylylene diamines with phosgene in the gaseous phase.

A method for exposing a substrate to water under superatmospheric pressure at a temperature of at least 70 C. includes (a) applying a reaction mixture to a substrate, which reaction mixture has an isocyanate index of at least 10 and includes an aromatic polyisocyanate component, a polyol component having a polyol with a hydroxyl equivalent weight of at least 500, and a catalyst component having an isocyanate trimerization catalyst, and at least partially curing the reaction mixture to form a polyisocyanurate or polyurethane-isocyanurate polymer having a glass transition temperature of at least 80 C., and (b) exposing the substrate and the polyisocyanurate or polyurethane-isocyanurate polymer to water under superatmospheric pressure at a temperature of at least 70 C.