摘要:
The present invention relates to a process for producing a plastic lens having a high refractive index and profile regularity comprising forming a mixture of one or more of sulfur-containing aromatic polyisocyanate compounds, one or more of active hydrogen compounds selected from the group consisting of polyol compounds and polythiol compounds, and at least one internal mold releasing agent, and subjecting the resulting mixture to casting polymerization, and a plastic lens obtained according to the process.
摘要:
Disclosed herein are a novel and highly refractive S-alkyl thiocarbamate base resin useful in preparing lenses and a process for producing the resin comprising reacting one or more of polyisocyanate compounds and one or more of mercapto compound having at least one hydroxyl group, a plastic lens made of the resin, and a process for making a plastic lens of high profile regularity from the resin by using internal mold releasing agents in the casting polymerization process.
摘要:
This invention relates to a novel preparation process of 4-(4-hydroxyphenyl)-cyclohexanol, which comprises subjecting 4-(4-hydroxphenyl)-3-cyclohexen-1-ol to reduction. 4-(4-Hydroxyphenyl)-cyclohexanol is a compound useful as a monomer for liquid crystalline polyesters and the like.
摘要:
A novel compound, 4-(4-hydroxyphenyl)-3-cyclohexene-1-ol, and a novel preparation process of 4,4'-biphenol by using the novel compound as the raw material.4-(4-Hydroxyphenyl)-3-cyclohexene-1-ol can be obtained by conducting a thermal decomposition reaction of 4,4-bis(4-hydroxyphenyl)cyclohexanol. 4,4'-Biphenol can be industrially manufactured by conducting a dehydrogenation reaction of 4-(4-hydroxyphenyl)-3-cyclohexene-1-ol.
摘要:
A novel compound, 4-(4-hydroxyphenyl)-3-cyclohexene-1-ol, and a novel preparation process of 4,4'-biphenol by using the novel compound as the raw material.4-(4-Hydroxyphenyl)-3-cyclohexene-1-ol can be obtained by conducting a thermal decomposition reaction of 4,4-bis(4-hydroxyphenyl)cyclohexanol. 4,4'-Biphenol can be industrially manufactured by conducting a dehydrogenation reaction of 4-(4-hydroxyphenyl)-3-cyclohexene-1-ol.
摘要:
A process for preparing cyclohexanonecarboxylic acid compounds by catalytically hydrogenating the corresponding hydroxybenzoic acid compounds in a secondary alcohol or tertiary alcohol solvent.
摘要:
A process for the preparation of 4'-hydroxybiphenyl-4-carboxylic acid by reacting a cyclohexanone-4-carboxylic acid compound with phenol in the presence of an acid catalyst, and then subjecting the resulting 4,4-bis(4-hydroxyphenyl)cyclohexanecarboxylic acid compound to decomposition and dehydrogenation reactions in the presence of a base and a dehydrogenation catalyst. The aforesaid cyclohexanone-4-carboxylic acid compound is obtained by catalytically hydrogenating a 4-hydroxybenzoic acid compound in a secondary alcohol or tertiary alcohol solvent, and the reaction mixture thus obtained is directly used for the reaction with phenol.
摘要:
Novel 4,4-bis(4-hydroxyphenyl)cyclohexanecarboxylic acid derivatives. These compounds can be prepared by reacting a cyclohexanone-4-carboxylic acid with a phenol.
摘要:
Disclosed are a fluorinating agent represented by the general formula (1): wherein R1 to R4 are a substituted or unsubstituted, saturated or unsaturated alkyl group or a substituted or unsubstituted aryl group, and can be the same or different; R1 and R2 or R3 and R4 can bond to form a ring including a nitrogen atom or a nitrogen atom and other hetero atoms; or R1 and R3 can bond to form a ring including a nitrogen atom or a nitrogen atom and other hetero atoms, for example: a preparation process of the fluorinating agent and a process for preparing fluorine compounds by reacting various compounds with the fluorinating agent. The invention has also disclosed that the fluorinating agent is very effective for fluorinating oxygen containing functional compounds.
摘要:
The invention disclose a hydrogen fluoride containing composition comprising hydrogen fluoride and a compound which is liquid in the standard state (25° C., 1 atmosphere) and has a boiling point of 120° C. or more and pka of 12 or more at 25° C., and use of the composition for a fluorination agent. The compound which can be preferably used is represented by the formula (1): wherein R1 to R4 are a substituted or unsubstituted alkyl or aryl group and can be the same or different, and R1 or R2 or R3 and R4 can bond to form a ring having a nitrogen atom or a nitrogen atom and other hetero atom, or R1 and R3 can bond to form a ring having a nitrogen atom or a nitrogen atom and other hetero atom. The fluorination agent of the invention exerts effect with a similar reaction mechanism to hydrogen fluoride, can be applied to the halogen exchange reaction of a halogen containing organic compound, and can produce a fluorine containing compound with safety and ease without specific equipment or technique.