摘要:
A composition including a compound having structural formula (I): Rf is a linear or branched perfluoroalkyl group having 1-3 atoms; n is 0-2; x is 1-3; and Rf′ and Rf″ are (i) independently, a linear or branched perfluoroalkyl group having 1-8 carbon atoms; or (ii) are bonded together to form a ring structure having 4-8 carbon atoms. The composition further includes a hydrocarbon contaminant.
摘要:
Disclosed are trans, 3-oxa carbinol analogs of prostaglandin E.sub.1 represented by the formula: ##STR1## wherein R is n-alkyl of 4-6 carbon atoms, cycloalkyl of 5 to 7 carbon atoms or 1,1-dimethylalkyl of 6 to 8 carbon atoms. Particular compounds corresponding to the above formula are variously useful as antithrombotic agents due to their ability to inhibit platelet aggregation, bronchodilators, inhibitors of gastric secretion and anti-hypertensive agents.
摘要:
Fluorine containing oxyvinyl compounds characterized by having one or more oxyvinyl groups separated from fluorine containing groups by at least one alkylene group having 2-8 carbon atoms and by at least one oxygen atom in addition to the oxygen on the oxyvinyl. In general the compounds of the invention have the generic formula:Rz(L).sub.a (Ry).sub.b OROCH.dbd.CH.sub.2.Where L is .dbd.CHCOOROCH.dbd.CH.sub.2 ; a is number of 0 to about 1; R.sub.y is --CO--; b is a number of 0 to about 1; R is cycloalkane or (CH.sub.2).sub.x --, where x is a number of about 2 through about 10; R.sub.z is R.sub.f C.sub.n H.sub.m where R.sub.f is a fluorinated alkylene moiety of about 1 to about 12 carbon atoms which may be linear or branch chained and may contain a further --OROCH.dbd.CH.sub.2 group; n is an integer of about 1 through about 6; and m is an integer of n to 2n. The compounds are suitable for use in optical devices such as fibers and waveguides, are readily radiation curable and curable by other means, and can be formulated to be of low viscosity when applied. The compounds are also suited for coatings, inks and adhesive and other applications. The invention includes methods for preparing and using the compounds and products employing the compounds. Intermediates to prepare the compounds and methods to prepare the intermediates are also included.
摘要:
A novel liquid crystalline compound having a high elastic constant ratio (K.sub.33 /K.sub.11) and an improved solubility thereof in other liquid crystal materials, at low temperatures, and a liquid crystal composition containing the same are provided. The liquid crystalline compound is expressed by the formula (1): ##STR1## wherein Q represents CF.sub.3, CF.sub.2 H or CFH.sub.2 ; A.sub.1, A.sub.2 and A.sub.3 each independently represent trans-1,4-cyclohexylene group, 1,4-phenylene group, wherein one or more hydrogen atoms on its six-membered ring may be replaced by F, Cl or CN, pyridine-2,5-diyl group or 1,3-pyrimidine-2,5-diyl; ring B represents 1,4-phenylene group or trans-1,4-cyclohexylene group; Z.sub.1, Z.sub.2 and Z.sub.3 each independently represent covalent bond, --C.dbd.C--, --C.tbd.C--, --OCO--, --COO--, --CH.sub.2 O--, --OCH.sub.2 --, --(CH.sub.2).sub.2 -- or --(CH.sub.2).sub.4 --; l and m each independently represent an integer of 0 to 5; o and p each independently represent 0 or 1; L.sub.1 and L.sub.2 each independently represent H, F or Cl; L.sub.3 represents halogen atom, CN, CF.sub.3, CF.sub.2 H, CFH.sub.2, OCF.sub.3, OCF.sub.2 H, H or an alkyl group of 1 to 10 carbon atoms or an alkenyl group of 2 to 10 carbon atoms wherein optional methylene groups (--CH.sub.2 --) in the alkyl group or the alkenyl group each independently may be replaced by --O--, --S--, --CO--, --OCO-- or --COO--, but two or more methylene groups should not be continuedly replaced.
摘要翻译:提供了一种在低温下具有高弹性常数比(K33 / K11)和改善其在其它液晶材料中的溶解度的新型液晶化合物和含有该液晶组合物的液晶组合物。 液晶化合物由式(1)表示:其中Q表示CF 3,CF 2 H或CFH 2; A1,A2和A3各自独立地表示反式-1,4-亚环己基,1,4-亚苯基,其六元环上的一个或多个氢原子可被F,Cl或CN取代,吡啶-2, 5-二基或1,3-嘧啶-2,5-二基; 环B表示1,4-亚苯基或反式-1,4-亚环己基; Z 1,Z 2和Z 3各自独立地表示共价键,-C = C - , - C 3BOND C - , - OO - , - COO - , - CH 2 O - , - OCH 2 - , - (CH 2)2 - 或 - (CH 2) 4-; l和m各自独立地表示0〜5的整数, o和p各自独立地表示0或1; L1和L2各自独立地表示H,F或Cl; L 3表示卤素原子,CN,CF 3,CF 2 H,CFH 2,OCF 3,OCF 2 H,H或1-10个碳原子的烷基或2-10个碳原子的链烯基,其中烷基中任选的亚甲基(-CH 2 - ) 基团或烯基各自独立地可以被-O - , - S - , - CO-,-OCO-或-COO-取代,但是不应该连续更换两个或多个亚甲基。
摘要:
Described herein are compounds of the formula ##STR1## wherein R represents a hydrogen atom or a methyl radical and X stands for a --CHO, or a --CN group, are useful as perfuming ingredients for preparing perfuming compositions and a variety of perfumed articles, to which they impart sandalwood-type odor notes, together with marine, ozone type odor characters, such that said compositions and articles thus acquire a "transparent" connotation. The aldehydes of formula (I) are also useful as starting products for the preparation of the corresponding fragrant alcohols and nitriles.
摘要:
Cyclopropylmethyl(ene) ethers have an outstanding action in microbicidal agents for preserving industrial materials from damage or destruction by microorganisms.
摘要:
A liquid crystalline compound expressed by the general formula (1) ##STR1## (wherein R.sub.1 is an alkyl group having 1 to 12 carbon atoms and one CH.sub.2 group in the alkyl group may be replaced by oxygen atom or --CH.dbd.CH--; X represents hydrogen atom or fluorine atom; Y represents hydrogen atom or alkoxy group having 1 to 5 carbon atoms; l and m independently represent 0 or 1, respectively; and n and p independently represent an integer of 0 to 10, respectively, and when p is 0, n is 1 or more, and when Y is an alkoxy group, X is a fluorine atom and p is 0.) Liquid crystal compositions which are suitable for use in liquid crystal display devices, have a high clearing point, and have a function of decreasing viscosity, and novel liquid crystalline compounds useful as a component of the liquid crystal compositions are provided.
摘要:
In a process for filtering plasma by separating blood into blood cells and plasma by a primary filter and filtering the separated plasma by a secondary filter to remove macromolecules from the plasma as harmful components, the loss of plasma to be discarded from the system by a procedure for eliminating plugging of the secondary filter can be diminished by opening an inner chamber of the secondary filter to the atmosphere to thereby lower the internal pressure of the chamber every time increase of the pressure to an upper limit value due to an increasing plugging tendency of the secondary filter is detected, and washing the interior of the secondary filter from the inner and outer chamber sides after the internal pressure has lowered.
摘要:
Vinyl compounds of the formula I ##STR1## in which the variables are as described in the claims. The compounds are useful as components in liquid-crystalline media.
摘要:
The present invention relates to novel perfluoro chemicals (PFC), particularly perfluorocyclic ethers and polyfluorinated compounds containing a few chlorine atoms and to a method for the preparation thereof.