摘要:
The invention relates to a fluorine-containing resin (graft copolymer) used for preparing a paint. This resin is prepared by a graft copolymerization of a fluorine-containing copolymer with a first monomer composition. The fluorine-containing copolymer comprises a first constitutional unit derived from a fluoroolefin and at least one of second and third constitutional units. The second constitutional unit is derived from a particular carboxylic acid vinyl ester represented by a general formula of R--C(.dbd.O)OCH.dbd.CH.sub.2 where R is a special group. The third constitutional unit is derived from a first monomer which is at least one compound selected from vinyl ethers and allyl ethers. The first monomer is represented by a general formula of R--O--(CH.sub.2)n--CH.dbd.CH.sub.2. The first monomer composition for preparing the resin contains a second monomer which is at least one compound selected from methacrylic acid esters and acrylic esters. The second monomer is represented by a general formula of CH.sub.2 .dbd.C(--R')C(.dbd.O)O--R where R' is hydrogen atom or methyl group. A composition prepared by mixing the resin with vinylidene fluoride resin or with a combination of vinylidene fluoride resin and acrylic resin is capable of providing a coated film having high gloss, high weather resistance, and good results in bending test for a long time. Another composition prepared by mixing the resin with a hardener is capable of providing a coated film having high hardness, good adhesion to various other coated films, high weather resistance, and high stain resistance.
摘要:
The present invention relates to a water-based fluorine-containing emulsion. This emulsion contains a fluorine-containing copolymer in a disperse phase thereof This copolymer is prepared by copolymerizing: (A) a fluoroolefin, (B) an organosilicon compound containing an olefinic unsaturated bond and an alkoxysilyl group, (C) an unsaturated carboxylic acid represented by a general formula of CH.sub.2 .dbd.CH--(CH.sub.2).sub.n --COOH where n is an integer of from 3 to 15, and (D) at least one other copolymerizable monomer. A paint prepared from the emulsion is superior in storage stability and mechanical stability, although this paint belongs to a one-package paint. A coated film formed by applying the paint is superior in water resistance in its early stages, stain resistance, and weather resistance.
摘要:
A polyimide precursor composition which is produced by (i) providing a polyamide acid solution obtained by reacting an aromatic tetracarboxylic acid component and a diamine component in the presence of an oxygen-containing solvent and (ii) subjecting said polyamide acid solution to heat treatment. The polyimide precursor composition exhibits a desirable apparent viscosity and a desirable thixotropic property and it excels in film forming ability, and because of this, it enables the formation a high quality relief pattern film with no defect and which excels in form retention by way of the screen printing. Further, the polyimide precursor composition is extremely suitable for the formation of a relief pattern by way of screen printing in the production of electronic, electric, optical, or precision devices, wherein the relief pattern is required to have a reduced dielectric constant and a reduced residual stress and to have a sufficient heat resistance, moisture resistance, physical strength, and chemical stability.
摘要:
In a lamp body, a second reflective surface, which reflects light reflected from a first reflective surface to a front side again so as to emit the light toward the front side, is formed on a back surface of a lens main body; fixing portions protrude outward from an outer peripheral portion of the lens main body and are fixed to a seating section; the first reflective surface is formed in a shape of a band which extends in one direction and of which both end portions reach the outer peripheral portion of the lens main body; constricted portions, which are recessed inward, are formed at the outer peripheral portion of the lens main body near at least one of the both end portions of the first reflective surface; and the fixing portions are disposed in the constricted portions.
摘要:
Aromatic urethanes can be produced by interacting an aromatic primary amino compound having a nitro group, a nitroso group or a carbamate group, an organic compound having at least one hydroxyl group, and carbon monoxide in the presence of a catalytic system composed of a platinum group metal and/or a compound thereof serving as catalyst and a Lewis acid and/or a compound thereof as promoter under high temperature and high pressure conditions. For instance, the interaction of 2-amino-4-nitrotoluene, ethanol and carbon monoxide in the presence of palladium chloride and a ferrous chloride-pyridine complex under high temperature and high pressure conditions can yield 2,4-diethylcarbamatetoluene.
摘要:
In a lamp body, a second reflective surface, which reflects light reflected from a first reflective surface to a front side again so as to emit the light toward the front side, is formed on a back surface of a lens main body; fixing portions protrude outward from an outer peripheral portion of the lens main body and are fixed to a seating section; the first reflective surface is formed in a shape of a band which extends in one direction and of which both end portions reach the outer peripheral portion of the lens main body; constricted portions, which are recessed inward, are formed at the outer peripheral portion of the lens main body near at least one of the both end portions of the first reflective surface; and the fixing portions are disposed in the constricted portions.
摘要:
A polyimide precursor composition which is produced by (i) providing a polyamide acid solution obtained by reacting an aromatic tetracarboxylic acid component and a diamine component in the presence of an oxygen-containing solvent and (ii) subjecting said polyamide acid solution to heat treatment. The polyimide precursor composition exhibits a desirable apparent viscosity and a desirable thixotropic property and it excels in film forming ability, and because of this, it enables the formation a high quality relief pattern film with no defect and which excels in form retention by way of the screen printing. Further, the polyimide precursor composition is extremely suitable for the formation of a relief pattern by way of the screen printing in production of electronic, electric, optical, or precision devices, wherein the relief pattern is required to have a reduced dielectric constant and a reduced residual stress and to have a sufficient heat resistance, moisture resistance, physical strength, and chemical stability.
摘要:
In a process for preparing an aromatic urethane which comprises reacting an aromatic nitro compound, an organic compound containing at least one hydroxyl group, and carbon monoxide at elevated temperature and pressure in the presence of a catalytic system composed of a catalyst consisting of a platinum metal, a platinum metal compound, and/or a platinum metal compound-containing compound and a promoter consisting of a Lewis acid and/or a Lewis acid-containing compound, an organic primary amino compound, a urea compound, a biuret compound, an allophanate compound, or a mixture thereof is added to the reaction system whereby the reaction rate is increased and the yield of the desired product is enhanced. For example, 2,4-diethylcarbamatetoluene can be prepared in quantitatively high yield by reacting 2,4-dinitrotoluene, ethanol, carbon monoxide, and a small amount of aminonitrotoluene at elevated temperature and pressure in the presence of palladium chloride and ferrous chloride-pyridine complex.
摘要:
The invention relates to a method for producing a benzoic acid derivative represented by the general formula (1). The method includes the step of reacting an aromatic compound represented by the general formula (2), with carbon monoxide and a hydroxy compound (i.e., water or an alcohol), in the presence of (a) a metal compound containing a metal of 8, 9 and 10 groups of periodic table, (b) a first phosphine derivative represented by the general formula (R1)2P—Q—P(R1)2, and (c) a base, It is possible to easily and efficiently produce the benzoic acid derivative by the method.
摘要:
A polyimide precursor composition solution includes a tetracarboxylic acid component containing not less than 70 mol % of at least one selected from the group consisting of benzenetetracarboxylic acid and its reactive derivatives; a maleimide compound; and a diamine component containing not less than 70 mol % of 2,2'-substituted-4,4'-benzidine represented by the general formula (I) and siloxydiamine amounting to from 1 to 10 mol %. The tetracarboxylic acid component, the maleimide compound and the diamine component are dissolved in a solvent which is consisting essentially of .gamma.-butyrolactone. The amount of the tetracarboxylic acid component is substantially equivalent to that of the diamine component. The amount of the maleimide compound is from 5 to 30 wt % of the total weight of the tetracarboxylic acid and the diamine component. A polyimide coating film prepared from the polyamide precursor solution is very low in residual stress and superior in adhesion to a substrate, has a very flat surface and can be desirably treated by wet etching process with an etching solution which is not hazardous. ##STR1## wherein R are the same or different ones selected from the group consisting of CF.sub.3, CH.sub.3, C.sub.2 H.sub.5, OCH.sub.3, OC.sub.2 H.sub.5, Cl, Br and phenyl group.
摘要翻译:聚酰亚胺前体组合物溶液包括含有不少于70mol%的选自苯四甲酸及其活性衍生物中的至少一种的四羧酸组分; 马来酰亚胺化合物; 和含有不少于70摩尔%的由通式(I)表示的2,2'-取代-4,4'-联苯胺和1〜10摩尔%的硅氧酰胺的二胺成分。 将四羧酸组分,马来酰亚胺化合物和二胺组分溶解在基本上由γ-丁内酯组成的溶剂中。 四羧酸组分的量基本上等于二胺组分的量。 马来酰亚胺化合物的量为四羧酸和二胺成分总重量的5〜30重量%。 由聚酰胺前体溶液制备的聚酰亚胺涂膜的残留应力非常低,并且对基材的粘合性优异,具有非常平坦的表面,并且可以通过湿法蚀刻工艺优选用不危险的蚀刻溶液处理。 (I)其中R是选自CF 3,CH 3,C 2 H 5,OCH 3,OC 2 H 5,Cl,Br和苯基的相同或不同的基团。