摘要:
The invention provides a refrigerant comprising a mixture of three compounds selected from the group consisting of hydrofluorocarbons represented by the formula ClHmFn (1) wherein when l is 1, m is an integer of 1 or 2, n is an integer of 2 or 3 and m+n=4; when l is 2, m is an integer of 1 to 4, n is an integer of 2 to 5 and m+m=6; and when l is 3, m is an integer of 1 to 3, n is an integer of 5 to 7 and m+n=8.
摘要翻译:本发明提供一种制冷剂,其包含三种选自以下组中的三种化合物的混合物,所述三种化合物由式(Ⅳ)所示的氢氟烷代表,当l为1时,m为1或2的整数,n为2或3的整数,m + n = 4 ; 当l为2时,m为1〜4的整数,n为2〜5的整数,m + m = 6。 当l为3时,m为1〜3的整数,n为5〜7的整数,m + n = 8。
摘要:
Incombustible azeotropic like solvent compositions comprising 87 to 92 parts by weight of 1,1,2-trichloro-1,2,2-trifluoroethane and 8 to 13 parts by weight of hydrocarbons, said hydrocarbons have a boiling point of 49.degree. to 58.degree. C.
摘要:
A solvent composition comprising a mixture of at least one polyfluoroalkane and at least one lower alcohol, wherein the polyfluoroalkane is selected among those represented by the general formula (1): (CF.sub.3).sub.2 CF--R wherein R represents a fluorinated ethyl group substituted by 1 to 4 fluorine atoms, and the lower alcohol is selected from the group consisting of methyl, ethyl, n-propyl and isopropyl alcohol.
摘要:
The present invention provides blowing compositions for preparing foamed or expanded products of thermoplastics. Each of the blowing compositions comprises a combination of two of halogenated hydrocarbons.
摘要:
The present invention provides an oil for a refrigerating machine using a hydrogen-containing halogenated hydrocarbon as a refrigerant, the oil comprising a fluorine-containing polyether having repeated units represented by the formula(--CF.sub.2 CF.sub.2 CF.sub.2 O).sub.l (CHFCF.sub.2 CF.sub.2)).sub.m (CH.sub.2 CF.sub.2 CF.sub.2 O).sub.n (I)wherein l, m and n are all an integer of at least zero, the polyether being capable of satisfying the relationship represented by ##EQU1##
摘要:
Solvents or solvent compositions comprising HCFC-234. The solvents can be used, instead of CFC-113, as solvents, diluents, cleaning agents, drying agents or dispersing agents. The solvent compositions of HCFC-234 with an aliphatic alcohol having 1 to 4 carbon atoms or with cyclohexane can give azeotropic compositions.
摘要:
A primary object of the invention is to provide a method of producing rigid polyurethane foams using 1,1-dichloro-1-fluoroethane (HCFC-141b) as the blowing agent while substantially avoiding the formation of decomposition products from HCFC-141b. The above object can be achieved by a method of producing rigid polyurethane foams which comprises reacting a polyol with an organic polyisocyanate for foaming in the presence of HCFC-141b and a stabilizer therefor and in the presence of an organic metal catalyst and/or an imidazole compound catalyst and by the thus-produced rigid polyurethane foams.
摘要:
The invention provides a desiccant composition comprising an alcohol and a fluorinated aliphatic hydrocarbon compound of the general formulaC.sub.n F.sub.m H.sub.2n+2-mwherein m and n each is a positive integer satisfying the relations: 4.ltoreq.n.ltoreq.6 and 2n-2.ltoreq.m
摘要翻译:本发明提供一种干燥剂组合物,其包含醇和通式CnFmH2n + 2-m的氟化脂族烃化合物,其中m和n各自为满足以下关系的正整数:4≤n≤6和2n-2 = m <2n + 2,以及用所述干燥剂组合物干燥制品的方法。
摘要:
The invention provides a dehydrating agent comprising at least one of fluorine-containing alcohols; a dehydrating agent comprising at least one of fluorine-containing alcohols and water; and a method of dehydrating and drying an article having a surface moistened with residual water, the method comprising immersing the article in a dehydrating agent comprising at least one of fluorine-containing alcohols or comprising at least one of fluorine-containing alcohols and water, and drying the article after the immersion.
摘要:
The invention provides:a blowing composition for producing foamed articles of polyurethane comprising at least one of chloropentafluoropropane and isomer thereof,a blowing composition for producing foamed articles of polyurethane comprising (a) at least one of chloropentafluoropropane and isomers thereof and (b) 1,1-dichloro-1-fluoroethane anda blowing composition for producing foamed articles of polyurethane comprising (a) at least one of chloropentafluoropropane and isomers thereof and (c) at least one of dichlorotrifluoroethane and isomers thereof.