摘要:
Ceramic-containing engines are lubricated by compositions containing synthetic ester base stock. Suitable esters include those prepared from iso- and neo-acids of medium chain length and polyols including inositol.
摘要:
This invention discloses an oil soluble polyether composition, comprising: ##STR1## wherein R is either a C.sub.14-20 alkyl or C.sub.9-12 alkylphenyl; A is ##STR2## where x is from 7 to 13; i, j, k, and l are each independently from 0 to 35 and the sum (i+j+k+l) is from 8 to 35;o, p, and q are each independently 0 to 1 and the sum (o+p+q) is from 0 to 3; and,the average mole ratio of the glycidyl ether monomeric unit A to the initiator unit RO is from 0.4:1 to 1.5:1.This invention also discloses an anionic polymerization process for producing an oil soluble polyether composition, comprising reacting a mixture of propylene oxide and a C.sub.8-14 alkyl glycidyl ether with an initiator obtained from the group consisting of a C.sub.14-20 alkanol and a C.sub.9-12 alkylphenol under the influence of an alkaline metal alkoxide catalyst.
摘要翻译:本发明公开了一种油溶性聚醚组合物,其包含:其中R为C14-20烷基或C9-12烷基苯基; A是,其中x是7到13; i,j,k和l各自独立地为0至35,并且和(i + j + k + 1)为8至35; o,p和q各自独立地为0〜1,和(o + p + q)为0〜3; 缩水甘油醚单体单元A与引发剂单元RO的平均摩尔比为0.4:1〜1.5:1。 本发明还公开了一种用于生产油溶性聚醚组合物的阴离子聚合方法,其包括将环氧丙烷和C 8-14烷基缩水甘油醚的混合物与由C14-20烷醇和C9-12 烷基酚在碱金属醇盐催化剂的影响下。
摘要:
An effective lubricant for cold working of metals is provided by a combination of a water soluble copolymer of styrene with maleic anhydride, maleic acid, and/or an ammonium or substituted ammonium maleate salt with an ethoxylated alcohol, preferably an alcohol with at least 40 carbon atoms before ethoxylation and about 50% of its mass in the polyoxyethylene block in the molecule.
摘要:
Epoxy functionalized polyalpha-olefin lubricants compositions are prepared with superior properties by epoxidizing the olefinic bond of oligomers prepare by oligomerizing C.sub.6 -C.sub.20 alpha-olefins with reduced valence state chromium catalyst on silica support. The invention encompasses a product of reaction made by epoxidizing C.sub.30 + polyalpha-olefin oligomeric hydrocarbon lubricant having a branch ratio of less than 0.19 and pour point below -15.degree. C. in the presence of an epoxidizing amount of an epoxidizing agent wherein said product comprises a mixture of 2-dialkyl oxirane and 1,2-dialkyl oxirane having between an average of C.sub.30 and C.sub.1000 carbon atoms, said mixture having a branch ratio of less than 0.19 and pour point below -15.degree. C. The invention further encompasses blends and additive compositions of the novel epoxidizing polyalpha-olefins.
摘要:
A hydrogel that adheres to the surface of materials is provided by using as constituent elements a water-soluble main chain monomer, crosslinking agent, polymerization initiator, and adhesive monomer having at least a catechol group in a side chain.
摘要:
The invention relates to a graft copolymer comprising the reaction product of maleic anhydride and a backbone polymer wherein said graft copolymer comprises between 0.50 and 5.0 weight percent of maleic anhydride, wherein said backbone polymer is selected from the group consisting of poly-olefins and copolymers of ethylene and α-olefins with 3 to 8 carbon atoms, the graft copolymer has a MFI of more than 50 dg/min (@190° C., 2.16 kg), and more than 25% of the graft copolymer chains have a chain-end unsaturation. These graft copolymers are suitable as processing aids in e.g. extrusion of high molecular weight polymers. The invention relater also to a method for grafting maleic anhydride to polymers, comprising the steps of: melting an ethylene polymer by heating and down-shearing the polymer in a co- rotating, twin-screw extruder while injecting maleic anhydride and a free radical initiator into a polymer filled, pressurized section of the extruder; and mixing the polymer and the maleic anhydride in the extruder for sufficient time to graft the maleic anhydride wherein the free radical initiator is an organic peroxide that has a half-life (t1/2) of more than 1 second if measured in mono-chlorobenzene at 240° C.
摘要:
There is disclosed a lubricating oil for compression-type refrigerators comprising a polyvinyl ether compound which contains a constituting unit represented by the general formula (I), a polyvinyl ether compound which contains constituting units represented by each one of the general formulae (I) and (II), or a mixture of these polyvinyl ether compounds, as the main component thereof. Ratio by mol of carbon to oxygen in the above polyvinyl ether compounds is 4.2 to 7.0. Also disclosed is a lubricating oil for compression-type refrigerators comprising a polyvinyl ether compound containing constituting units which are both represented by the general formula (I) but between which R.sup.5 is different. The lubricating oil for compression-type refrigerators has excellent compatibility with hydrofluorocarbons, such as 1,1,1,2-tetrafluoroethane, and hydrochlorofluorocarbons which can be used as the refrigerant to replace compounds causing environmental pollution such as dichlorodifluoromethane, shows low hygroscopicity, and exhibits superior stability and lubricating property. ##STR1##
摘要:
This invention relates to a hydroxyaromatic functionalized polyalpha-olefin comprising the product of the combination of: a) a polyalpha-olefin comprising one or more C3 to C20 linear alpha-olefins and having at least 10% vinylidene unsaturation, a viscosity index of 80 to 400, an Mn of 300 to about 20,000, and a pour point of 0° C. or less; and b) a hydroxyaromatic moiety; wherein the analine point of the functionalized polyalpha-olefin is at least 10° C. lower than the analine point of the polyalpha-olefin.
摘要:
Method of lubricating a rubbed surface with a gaseous phase lubricant including a monomer constituent dispersed in a carrier fluid, where the monomer constituent is capable of forming in situ a polymer film directly on rubbing surfaces but is not polymerized in the carrier fluid, such that wear and friction of the rubbed surface are effectively reduced.