摘要:
A lubricating grease consisting of a mixture containing from 15% to 40% by weight of polytetrafluoroethylene, from 60% to 85% by weight of a liquid dispersing medium of the type of perfluoropolyether or oligomer of C.sub.2 ClF.sub.3, less than 1% by weight of a perfluoroalkyl or polyoxyperfluoroalkyl surfactant and, optionally, stabilizing and anticorrosive agents of the class of polyoxyperfluoroderivatives, said mixture being subjected to grinding in order to obtain the disaggregation of the polytetrafluoroethylene granules into primary particles not larger than 1 micron.
摘要:
A new class of elastomeric copolymers the chains of which contain perfluoropolyether radicals having a linear structure linked through cycloimide groups to organic radicals of different and suitable structure is disclosed, as well as a process for preparing such copolymers which comprises condensing a mixture of fluorinated polyether diamines with one or more tetracarboxylic dianhydrides or esters.
摘要:
Compounds suitable for being used as lubricants, having general formula:(I) RO--(C.sub.3 F.sub.6 O).sub.m --(CFXO).sub.n --CFX--L, or(II) R"CFXO--(C.sub.3 F.sub.6 O).sub.x (CFXO).sub.y --(C.sub.2 F.sub.4 O).sub.z --CFX--L, whereR=--CF.sub.3, --C.sub.2 F.sub.5, --C.sub.3 F.sub.7X=F, --CF.sub.3R"=F, --CF.sub.3, --C.sub.2 F.sub.5m=an integer from 3 to 100n=a finite integer, or =zero, wherefore m+n ranges from 3 to 100, provided that, if n is finite, m/n ranges from 5 to 20 and R is preferably =CF.sub.3, if n=zero, R is preferably --C.sub.2 F.sub.5 or --C.sub.3 F.sub.7x=a finite integer, or =zeroy, z=finite integers, such that x+y+z ranges from 5 to 200, while (x+z)/y ranges from 5 to 0.5, provided that when x=zero, z/y ranges from 1 to 0.5 and y+z ranges from 5 to 200 n while X is preferably F, and R"=LL=group Y-Z, where:Y=--CH.sub.2 O--, --CH.sub.2 --OCH.sub.2, --CF.sub.2, --CF.sub.2 O--,Z=a non-aromatic, non-fluorinated organic radical free from activated hydrogen atoms, containing two or more heteroatoms, which are electron doublet donors, or an aromatic radical, either or not containing heteroatoms, capable of giving rise to coordinative bonds or to charge-transfer bonds, thus causing various kinds of adsorption phenomena on metallic, polymeric or ceramic surfaces.
摘要:
Compounds suitable for being used as lubricants, having general formula:(I) RO--(C.sub.3 F.sub.6 O).sub.m --(CFXO).sub.n --CFX--L,or(II) R"CFXO--(C.sub.3 F.sub.6 O).sub.x (CFXO).sub.y --(C.sub.2 F.sub.4 O).sub.z --CFX--L,whereR=--CF.sub.3, --C.sub.2 F.sub.5, --C.sub.3 F.sub.7X=F, --CF.sub.3R"=F, --CF.sub.3, --C.sub.2 F.sub.5m=an integer from 3 to 100n=a finite integer, or=zero, wherefore m+n ranges from 3 to 100, provided that, if n is finite, m/n ranges from 5 to 20 and R is preferably=CF.sub.3, if n=zero, R is preferably --C.sub.2 F.sub.5 or --C.sub.3 F.sub.7x=a finite integer, or=zeroy, z=finite integers, such that x+y+z ranges from 5 to 200, while (x+z)/y ranges from 5 to 0.5, provided that when x=zero, z/y ranges from 1 to 0.5 and y+z ranges from 5 to 200 n while X is is preferably F, and R"=LL=group Y-Z,where:Y=--CH.sub.2 O--, --CH.sub.2 --OCH.sub.2, --CF.sub.2, --CF.sub.2 O--,Z=a non-aromatic, non-fluorinated organic radical free from activated hydrogen atoms, containing two or more heteroatoms, which are electron doublet donors, or an aromatic radical, either or not containing heteroatoms, capable of giving rise to coordinative bonds or to charge-transfer bonds, thus causing various kinds of adsorption phenomena on metallic, polymeric or ceramic surfaces.
摘要翻译:适用于润滑剂的化合物,具有以下通式:(I)RO-(C 3 F 6 O)m - (CFXO)n -CFX-L或(II)R''CFXO-(C 3 F 6 O)x(CFXO)y - ( C 2 F 4 O)z-CFX-L,其中R = -CF 3,-C 2 F 5,-C 3 F 7 X = F,-CF 3 R“= F,-CF 3,-C 2 F 5 m = 3至100的整数n =有限整数, 或= = 0,因此如果n为有限,则m / n为5〜20,R优选= CF 3,若n = 0,则R优选为-C 2 F 5或-C 3 F 7 x =有限整数,或=零y,z =有限整数,使得x + y + z的范围为5至200,而(x + z)/ y的范围为5至0.5,条件是当x = z / y为1〜0.5,y + z为5〜200n,X优选为F,R“= LL = YZ组,其中:Y = -CH 2 O - , - CH 2 -OCH 2,-CF 2 ,-CF 2 O-,Z =不含活性氢原子的非芳族非氟化有机基团,含有两个或更多个杂原子,它们是电子双键供体,或者是含有或不含有杂原子的芳族基团,能够产生 对协调债券或收费 转移键,从而在金属,聚合物或陶瓷表面引起各种吸附现象。
摘要:
Compounds suitable for being used as lubricants, having general formula:RO--(C.sub.3 F.sub.6 O).sub.m --(CFXO).sub.n --CFX--L, (I)orR"CFXO--(C.sub.3 F.sub.6 O).sub.x (CFXO).sub.y --(C.sub.2 F.sub.4 O).sub.z--CFX--L, (II)whereR=--CF.sub.3, --C.sub.2 F.sub.5, --C.sub.3 F.sub.7X=F, --CF.sub.3R"=F, --CF.sub.3, --C.sub.2 F.sub.5m=an integer from 3 to 100n=a finite integer, or=zero, wherefore m+n ranges from 3 to 100, provided that, if n is finite, m/n ranges from 5 to 20 and R is preferably=CF.sub.3, if n=zero, R is preferably --C.sub.2 F.sub.5 or --C.sub.3 F.sub.7x=a finite integer, or=zeroy, z=finite integers, such that x+y+z ranges from 5 to 200, while (x+z)/y ranges from 5 to 0.5, provided that when x=zero, z/y ranges from 1 to 0.05 and y+z ranges from 5 to 200 n while X is preferably F, and R"=LL=group A--Y, whereA=--CH.sub.2 O--, --CH.sub.2 --O--CH.sub.2, --CF.sub.2, --CF.sub.2 O,Y=an organic radical covered by one of the following formulas: ##STR1## R.sub.1, R.sub.2 =alkyls C.sub.1 -C.sub.3, E=CHR.sub.3 or --CH.sub.2 --CHR.sub.3B=H or a radical OR.sub.3,R.sub.3 =H or an alkyl C.sub.1 -C.sub.3.
摘要:
Compounds suitable for being used as lubricants, having general formula:(I) RO--(C.sub.3 F.sub.6 O).sub.m --(CFXO).sub.n --CFX--L, or(II) R"CFXO--(C.sub.3 F.sub.6 O).sub.x (CFXO).sub.y --(C.sub.2 F.sub.4 O).sub.z --(CFX--L, whereR=--CF.sub.3, --C.sub.2 F.sub.5, --C.sub.3 F.sub.7X=F, --CF.sub.3R"=F, --CF.sub.3, --C.sub.2 F.sub.5m=an integer from 3 to 100n=a finite integer, or=zero, wherefore m+n ranges from 3 to 100, provided that, if n is finite, m/n ranges from 5 ro 20 and R is preferably=CF.sub.3, if n=zero, R is preferably --C.sub.2 F.sub.5 or --C.sub.3 F.sub.7x=a finite integer, or=zeroy, z=finite integers, such that x+y+z ranges from 5 to 200, while x+z/y ranges from 5 to 0.5, provided that when x=zero, z/y ranges from 1 to 0.5 and y+z ranges from 5 to 200 n while X is preferably F, and R"=LL=group A--Y, whereA=--CH.sub.2 O--, --CH.sub.2 --O--CH.sub.2, --CF.sub.2, CF.sub.2 O--,Y=an organic radical covered by one of the following formulas: ##STR1## where R.sub.1, R.sub.2 =alkyls C.sub.1 -C.sub.3,E=CHR.sub.3 or --CH.sub.2 --CHR.sub.3B=H or a radical OR.sub.3 --R.sub.3 =H or an alkyl C.sub.1 -C.sub.3.
摘要翻译:适用于润滑剂的化合物,具有以下通式:(I)RO-(C 3 F 6 O)m - (CFXO)n -CFX-L或(II)R''CFXO-(C 3 F 6 O)x(CFXO)y - ( C 2 F 4 O)z - (CFX-L,其中R = -CF 3,-C 2 F 5,-C 3 F 7 X = F,-CF 3 R“= F,-CF 3,-C 2 F 5 m = 3至100的整数n =有限整数 或= = 0,因为m + n的范围为3至100,条件是如果n是有限的,则m / n的范围为5罗20,R优选为= CF 3,如果n = 0,则R优选为-C 2 F 5或 - C3F7 x =有限整数,或= 0,z =有限整数,使得x + y + z的范围为5至200,而x + z / y的范围为5至0.5,条件是当x =零时,z / y为1〜0.5,y + z为5〜200n,X优选为F,R“= LL = AY,A = -CH 2 O - , - CH 2 -O-CH 2,-CF 2, CF 2 O-,Y =由下式之一覆盖的有机基团:其中R 1,R 2 =烷基C 1 -C 3,E = CHR 3或-CH 2 -CHR 3 B = H或基团OR 3 -R 3 = H或 烷基C1-C3。
摘要:
A process for fully removing from the perfluoropolyethers having a minimum vapor tension, the organic polluting matters containing group --OH and/or bonds ##STR1## consisting in treating the perfluoropolyether with oxygen, or chlorine or fluorine, at a high temperature and in the presence of ultraviolet radiations, in order to convert the impurities to volatile degradation products easily removable by degassing.
摘要:
A process for protecting marble, stones, tiles, cement and similar materials from the action of atmospheric and polluting agents, by applying a perfluropolyether to the surface of the manufactured article, characterized by using a perfluoropolyether having at one or at both ends functional groups capable of acting as anchoring agents for the substrate.
摘要:
1) Disclosed herein are new fluorine-containing compounds having polyacetalic structure, of general formula:[Rf.sub.m --CH.sub.2 O(CH.sub.2 O).sub.c --CH.sub.2 --.brket close-st..sub.n (I)where:Rf=a perfluorooxyalkylene chain having Mn from 500 to 5,000;m=4-25;c=1-10;n=2-100.2) A process for preparing them which comprises carrying out the polycondensation of diols having formula:HORfOH (II)with formaldehyde, in mass or in the presence of solvents, in an acid medium. The compounds of formula (I) can be oligomeric compounds (polymerization degree x.sub.n from 2 to about 20) or polymeric compounds (x.sub.n from about 20 to about 100). They exhibit a high stability to heat and to chemical agents, and Tg values slightly different from the ones of the diols utilized for preparing them.
摘要翻译:1)本文公开了具有以下通式的具有聚缩醛结构的新的含氟化合物:[Rfm-CH2O(CH2O)c-CH2- + 548n(I))其中:Rf =具有+ E的全氟氧化烯链,ovs M + EE n从500到5,000; m = 4-25; c = 1-10; n = 2-100。 2)一种制备它们的方法,其包括在酸性介质中,以质量或在溶剂存在下,将具有式:HORFOH(II)的二醇与甲醛缩聚。 式(I)化合物可以是低聚化合物(聚合度+ E,ovs x + EE n从2至约20)或聚合化合物(+ E,ovs x + EE n约20至约100)。 它们对热和化学试剂表现出高稳定性,并且Tg值与用于制备它们的二醇的那些略有不同。
摘要:
1) New fluorine-containing compounds having polyacetalic structure, of general formula:(I)[Rf.sub.m --CH.sub.2 O(CH.sub.2 O).sub.c --CH.sub.2 ].sub.nwhere:Rf=a perfluorooxyalkylene chain having Mn from 500 to 5,000;m=4-25;c=1-10;n=2-100.2) A process for preparing them, which comprises carrying out the polycondensation of diols having formula:(II) HORfOHwith formaldehyde, in mass or in the presence of solvents, in an acid medium. The compounds of formula (I) can be oligomeric compounds (polymerization degree x.sub.n from 2 to about 20) or polymeric compounds (x.sub.n from about 20 to about 100). They exhibit a high stability to heat and to chemical agents, and Tg values slightly different from the ones of the diols utilized for preparing them.
摘要翻译:1)具有通式:(I)[Rfm-CH 2 O(CH 2 O)c -CH 2] n]的具有聚缩醛结构的新的含氟化合物,其中:Rf =具有500-5,000的<上升&Mn的全氟氧化烯链; m = 4〜25; c = 1-10; n = 2-100。 2)一种制备它们的方法,其包括在酸性介质中以质量或在溶剂存在下,使式(II)HORFOH与甲醛进行缩聚反应。 式(I)的化合物可以是低聚化合物(聚合度和上限,从2到约20)或聚合化合物(和从约20到约100)。 它们对热和化学试剂表现出高稳定性,并且Tg值与用于制备它们的二醇的那些略有不同。