摘要:
The present invention relates to a halogen-free epoxy resin composition, a prepreg and a laminate containing the same. The halogen-free epoxy resin composition comprises 60 parts by weight of epoxy resin, from 15 to 28 parts by weight of benzoxazine resin, and from 10 to 20 parts by weight of styrene-maleic anhydride. The present invention discloses using from 15 to 28 parts by weight of benzoxazine resin and from 10 to 20 parts by weight of styrene-maleic anhydride to cure 60 parts by weight of epoxy resin, to ensure the Df stability of prepregs at different curing temperature conditions while maintaining low dielectric constant and low dielectric loss. The prepregs and laminates prepared from the resin composition have comprehensive performances, such as low dielectric constant, low dielectric loss, excellent flame retardancy, heat resistance, cohesiveness, low water absorption and moisture resistance, and are suitable for use in halogen-free multilayer circuit boards.
摘要:
Provided herein are multicyclic compounds of formula (IVa), shown below, wherein R1, R2, R3, R4, R5, R6, R7, m, and n are defined herein elsewhere, methods of their synthesis, pharmaceutical compositions comprising the compounds, and methods of their use. The compounds provided herein are useful for the treatment, prevention, and/or management of various neurological disorders, including but not limited to, psychosis and schizophrenia.
摘要:
Methods for removing 1,3,5-trimethylhexahydro-1,3,5-triazine and N-methylenemethanamine from a N-methylimidazole and methods for making oligonucleotides using N-methylimidazole are provided. In one embodiment, a method for removing 1,3,5-trimethylhexahydro-1,3,5-triazine and N-methylenemethanamine from a feedstock containing N-methylimidazole includes contacting the feedstock with small or medium pore molecular sieves. The small or medium pore molecular sieves adsorb 1,3,5-trimethylhexahydro-1,3,5-triazine and N-methylenemethanamine from the feedstock. The method further includes separating the small or medium pore molecular sieves from the feedstock.
摘要:
An ion-immobilized metal oxide particle includes a metal oxide particle and an anion that itself includes a) a reactive group that consists of an alkoxysilyl group and b) an anionic group consisting of a carboxylate (—COO−) group or a sulfonate (—SO3−) group, the anion being immobilized to the metal oxide particle via a silanol group derived from the reactive group. An elastomer includes the ion-immobilized metal oxide particle, and a transducer includes the elastomer.
摘要翻译:离子固定的金属氧化物颗粒包括金属氧化物颗粒和本身包含a)由烷氧基甲硅烷基组成的反应性基团和b)由羧酸酯(-COO-)或磺酸盐( - SO 3 - )基团,阴离子通过衍生自反应性基团的硅烷醇基团固定在金属氧化物颗粒上。 弹性体包括离子固定的金属氧化物颗粒,换能器包括弹性体。
摘要:
Disclosed are new colchicine solid-state forms, methods of preparing the solid-state forms, as well as formulations prepared therefrom and uses thereof.
摘要:
The invention discloses a method for preparation of 2-(2,3-dimethylphenyl)-1-proponal from bromo 2,3-dimethyl-benzene and aceton, its use in perfumes and its use for the preparation of medetomidine.
摘要:
The present disclosure relates to compounds, compositions and methods for the treatment of hepatitis C virus (HCV) infection. Also disclosed are pharmaceutical compositions containing such compounds and methods for using these compounds in the treatment of HCV infection.
摘要:
The present disclosure relates to therapeutic compositions comprising substituted imidazoliums having multiple acidic groups. The compounds may be used to treat diseases or conditions such as those associated with bone, cancer, or pain. Compositions, dosage forms, methods of treating diseases or conditions, methods of preparation, and other related embodiments related to the substituted imidazoliums are also described herein.
摘要:
An object of the present invention is to provide a pharmaceutical agent useful for treating and preventing neurological disease, having satisfactory solubility and oxidative stress-mediated cell death suppressive activity as well as capable of exhibiting excellent blood-brain barrier permeability. The present invention is directed to an acylaminoimidazole derivative represented by general formula (I) or a salt thereof, and a pharmaceutical and a therapeutic or preventive agent for neurological disease containing the same, as an active ingredient.
摘要:
The present invention features the use of a synthetic triterpenoid to induce gene expression and differentiation of stem or progenitor cells in the treatment of bone/cartilage diseases or conditions.