摘要:
A process for producing a multi-layer film having a plurality of synthetic resin layers laminated on a releasable flat substrate by casting, which comprises firstly forming on the substrate a synthetic resin layer having adhesive or sticking properties, and then casting and curing on the synthetic resin layer having adhesive or sticking properties at least one kind of reaction-curable resin raw material mixture substantially free from a solvent to form at least one cured synthetic resin layer, so that the uppermost layer is composed of a cured synthetic resin superior in surface properties to its adjacent layer. Further, surface defects transferred from the substrate to the adhesive layer are substantially eliminated by a subsequent lamination step.
摘要:
Thiadiazole derivatives with excellent herbicidal effectiveness, wide herbicidal spectrum and excellent selectivity are disclosed. The thiadiazole derivatives are represented by one of the formula [I]-[IV]. ##STR1##
摘要:
Disclosed is a composite composition consisting essentially of a silica polycondensate (A) formed by hydrolysis and polycondensation of one or more alkoxysilane compounds, and a polymer (B) of a radical-polymerizable vinyl compound (B') composed chiefly of at least one monomer selected from the group consisting of acrylic acid, methacrylic acid, acrylic esters and methacrylic esters, the silica polycondensate (A) and the polymer (B) of the vinyl compound (B') being intermingled homogeneously. This composite composition is produced by dissolving the silica polycondensate (A) in the vinyl compound (B') and effecting radical polymerization of the vinyl compound (B'). This composite composition has high transparency, rigidity, toughness and thermal resistance and is hence useful in fields of application where inorganic glass has heretofore been used.
摘要:
Disclosed is a color image-stabilization processing solution for a silver halide color photographic material containing at least one of (a) an N-methylol compound represented by the following formula (I): ##STR1## wherein X represents a group of non-metallic atoms necessary to form a 1H-pyrazole ring or 1H-1,2,4-triazole ring together with the nitrogen atom;and (b) an N-methylol compound satisfying the condition that an equilibrium constant in water at room temperature is 2.times.10.sup.-2 mol/liter or less and a formaldehyde-releasing rate constant is 1.times.10.sup.-5 sec.sup.-1 or more. This solution permits one to dispense formaldehyde and its attendant risks. Also disclosed is a method for processing silver halide color photographic materials using such a solution.
摘要:
Processes for producing optically active ester derivatives are disclosed. According to the present invention an optically active aryloxyphenoxy propionate derivative is produced by reacting a chlorinated heterocyclic aromatic compound with (2R)-2-(4-hydroxyphenoxy)propionic acid tetrahydrofurfuryl ester in an anhydrous solvent in the presence of a base. According to the present invention, an optically active propionate derivative of the formula [I] ##STR1## (wherein R represents hydrogen or 3-chloro-5-trifluoromethyl-2-pyridyl group) is produced by reacting a corresponding optically active methyl propionate derivative with tetrahydrofurfuryl alcohol, or by reacting a corresponding optically active propionic acid derivative with tetrahydrofurfuryl alcohol, or by reacting (2S)-tetrahydrofurfuryl 2-chloropropionate with a corresponding phenol derivative in specific conditions.