| Patent Number |
Title Of Patent |
Date Issued |
| 5763556 |
Copolymers of ethylene and geminally disubstituted olefins |
June 9, 1998 |
| Substantially random ethylene copolymers containing at least 3.0 mole percent of geminally disubstituted olefin monomers are described. The geminally disubstituted olefin monomers can be represented by the generic formula R.sub.1 =R.sub.2 (R.sub.3)(R.sub.4), where R.sub.1 is CH.sub.2, |
| 5763543 |
Olefin polymerization process with little or no scavenger present |
June 9, 1998 |
| The present invention relates to a continuous process for the polymerization of olefin(s) utilizing a metallocene catalyst or catalyst system in a continuous slurry or gas phase polymerization process for polymerizing monomer(s). The invention is more particularly drawn to a gas phas |
| 5763533 |
Electrical devices including ethylene, .alpha.-olefin, vinyl norbornene elastomers and ethylene |
June 9, 1998 |
| Elastomeric polymers including ethylene, alpha-olefin and vinyl norbornene are shown to have improved extrusion characteristics, improved electrical properties, improved cure characteristics compared to ethylene, alpha-olefin, non-conjugated diene elastomeric polymers containing non- |
| 5763532 |
Blends of polypropylene and elastic alpha-olefin/cyclic olefin copolymers |
June 9, 1998 |
| Blends of semi-crystalline polymers with rubbery thermoplastic copolymers are provided. The rubbery thermoplastic copolymers are elastic at temperatures above their Tg's and properties similar to thermoplastic elastomers and surface tensions 5 dynes/cm or more different, preferably g |
| 5759967 |
Ethylene .alpha.-olefin/diene interpolymer-substituted carboxylic acid dispersant additives |
June 2, 1998 |
| The present invention is directed to an oil-soluble lubricating oil additive comprising at least one terminally unsaturated ethylene/alpha-olefin/diene interpolymer of 300 to 20,000 number average molecular weight substituted with mono- or dicarboxylic acid producing moieties (prefer |
| 5759941 |
Process for the preparation of dialkyltin dialkoxide from alkyl carbamate and alcohol |
June 2, 1998 |
| A process for making a catalyst product which comprises reacting dialkyltin oxide with an alcohol and the corresponding alkyl carbamate at a temperature in the range between about 160 to 190.degree. C. and at an autogenous pressure, wherein the catalyst product comprises dialkyltin d |
| 5756873 |
Design for aromatics alkylation |
May 26, 1998 |
| A method is provided for simply and effectively increasing monoalkylation of aromatic compounds while also increasing the life of the acid catalyst used to alkylate said compounds. The method and apparatus involve drastically reducing the amount of the alkylation agent present in the |
| 5756434 |
Polyolefin-substituted amines grafted with poly (aromatic-N-monomers) for oleaginous composition |
May 26, 1998 |
| Novel polymers comprising polyolefin-substituted amines grafted with aromatic N-containing monomers such as aniline, have been found to provide oil soluble polymers having dispersant and antioxidant properties in oleaginous compositions, including fuel and lubricating oils. The polymers |
| 5756431 |
Dispersants derived from heavy polyamine and second amine |
May 26, 1998 |
| A Koch functionalized product, which is the reaction product of at least one hydrocarbon with carbon monoxide and a nucleophilic trapping agent, is derivatized with a heavy polyamine and a second amine. The hydrocarbon is a hydrocarbon compound or a hydrocarbon polymer. A heavy polyamine |
| 5756430 |
Mist oil lubricant |
May 26, 1998 |
| Mist oil lubricants are disclosed based on polycarboxylic acid esters as the base oil which have added 1 to 5% of polyisobutylene Mn 400-2500 as stray mist suppressants. |
| 5756428 |
High functionality low molecular weight oil soluble dispersant additives useful in oleaginous co |
May 26, 1998 |
| Hydrocarbyl substituted C.sub.4 to C.sub.10 monounsaturated dicarboxylic acid, anhydrides or esters, e.g. polyisobutenyl succinic anhydride, preferably made by reacting polymer of C.sub.2 to C.sub.10 monoolefin, preferably polyisobutylene, having a number arrange molecular weight of |
| 5756064 |
Siliceous offretite |
May 26, 1998 |
| Zeolite crystals having an offretite structure have smaller crystals and/or can be produced using a synthesis mixture of lower alkalinity than could otherwise be used, if a divalent metal cation, such as magnesium, barium or cobalt is included in the synthesis mixture. |
| 5755834 |
Low temperature enhanced distillate fuels |
May 26, 1998 |
| The invention is directed to a method of enhancing the low temperature flow properties of fuels comprising adding to the fuel a heated additive concentrate comprising: (A) at least one nitrogen-containing derivative of carboxylic acid, (B) an organic acid, and (C) at least one other flow |
| 5753786 |
Process for transitioning between incompatible polymerization catalysts |
May 19, 1998 |
| This invention relates to a process for transitioning between incompatible polymerization catalyst systems. Particularly, the invention relates to a process for transitioning from an olefin polymerization reaction utilizing a traditional Ziegler-Natta catalyst system to a metallocene-ole |
| 5753121 |
Inorganic composite membrane comprising molecular sieve crystals |
May 19, 1998 |
| Inorganic composite membrane containing molecular sieve crystals, comprising a macroporous support to which molecular sieve crystals and modifications thereof have been applied substantially as a monolayer, said crystals and modifications thereof having been oriented so that, toa sub |
| 5752992 |
Use of tertiary-hexyl methyl ether as a motor gasoline additive |
May 19, 1998 |
| A tertiary-hexyl methyl ether composition comprising 2-Methoxy-2,3-dimethyl butane (MDMB) in an amount of at least 10% by weight based on the total tertiary-hexyl methyl ethers is useful as an octane booster for motor gasoline or motor gasoline feedstock. |
| 5750750 |
High viscosity complex alcohol esters |
May 12, 1998 |
| A complex alcohol ester which comprises the reaction product of an add mixture of the following: a polyhydroxyl compound represented by the general formula:wherein R is any aliphatic or cyclo-aliphatic hydrocarbyl group and n is at least 2, provided that the hydrocarbyl group contains fr |
| 5750476 |
Power transmitting fluids with improved anti-shudder durability |
May 12, 1998 |
| The anti-shudder durability of power transmitting fluids, particularly automatic transmission fluids, is improved by incorporating a combination of low potency friction modifiers and phosphorus-containing compounds. The anti-shudder durability of these fluids may be further enhanced by |
| 5747612 |
Process for transitioning between incompatible polymerization catalysts |
May 5, 1998 |
| This invention relates to a process for transitioning between incompatible polymerization catalyst systems. Particularly, the invention relates to a process for transitioning from an olefin polymerization reaction utilizing a traditional Ziegler-Natta catalyst system to a metallocene-ole |
| 5747596 |
Gel-free alpha-olefin dispersant additives useful in oleaginous compositions |
May 5, 1998 |
| Gel-free dispersant additives for lubricating and fuel oil compositions comprise at least one adduct of (A) .alpha.-olefin homopolymer or interpolymer of 700 to 10,000 number average molecular weight, free radically grafted with an average of from about 0.5 to about 5 carboxylic acid |
| 5747592 |
Thermoplastic polymer compositions and their production and use |
May 5, 1998 |
| A thermoplastic polymer composition incorporating at least about 50 wt % polypropylene, at least about 20 wt % of an elastomer such as EP rubber and at least about 4 wt % plastomer. The plastomer is preferably a single site catalyzed ethylene based copolymer having a density less than ab |
| 5744434 |
Polyol ester compositions with unconverted hydroxyl groups |
April 28, 1998 |
| A synthetic ester composition which exhibits thermal and oxidative stability, lower friction coefficient and lower wear, wherein the ester composition comprises the reaction product of: a branched or linear alcohol having the general formula R(OH).sub.n, wherein R is an aliphatic or |
| 5744429 |
Mixed ethylene alpha olefin copolymer multifunctional viscosity modifiers useful in lube oil com |
April 28, 1998 |
| The present invention relates to novel multifunctional viscosity modifiers comprising a mixture of derivatized ethylene-alpha olefin copolymers, A and B. Said A copolymer comprising from about 30 to about 60 weight percent monomer units derived from ethylene and said B copolymer comp |
| 5744035 |
Module containing zeolite-based membrane and preparation thereof |
April 28, 1998 |
| The present invention relates to a continuous gastight film of zeolites on a porous underlayer, a zeolite membrane obtainable by calcining the gastight zeolite film, and a module with such a gastight zeolite film, which module consists of a membrane housing and a supported membrane, the |
| 5743923 |
Oil additives and compositions |
April 28, 1998 |
| The low temperature properties of a blend of biofuel and petroleum-based fuel oil are improved by the addition of an ethylene-unsaturated ester copolymer, or a comb polymer, or a polar N compound, or a compound having at least one linear alkyl groups connected to a non-polymeric organic |
| 5741563 |
Shrink films from propylene polymers |
April 21, 1998 |
| Shrink films prepared from metallocene catalyzed propylene homopolymers and copolymers are provided. The films exhibit a unique balance of properties as compared to known shrink films including higher stiffness, tensile strength and moisture barrier, lower extractables, improved shrinkag |
| 5739089 |
Dihydrocarbyl dithiophosphates |
April 14, 1998 |
| A mixed zinc/copper dihydrocarbyl dithiophosphate, e.g. of zinc diethyl-hexyl dithiophosphate and cuprous diethyl-hexyl dithiophosphate, is prepared by reacting a dihydrocarbyl dithiophosphoric acid (DDPA) with a mixture of a basic zinc compound eg ZnO, and a basic copper compound eg |
| 5739076 |
Catalysts and their use in oxidation of saturated hydrocarbons |
April 14, 1998 |
| New titanium zeolite Beta catalysts which have been found to be useful as catalysts for the oxidation of organic compounds using organic hydroperoxides as oxidation catalysts. They are particularly useful as ring opening oxidation catalysts and may be used to produce adipic acid from |
| 5736465 |
Polyolefin fibers and their fabrics |
April 7, 1998 |
| Novel fibers have been made from reactor grade isotactic poly-alpha-olefin wherein polypropylene is produced by single-site catalysis and has a melt flow rate of greater than zero to about 5,000, MWD in the range of about 1.0 to about 3.5. |
| 5733980 |
Ethylene .alpha.-olefin block copolymers and methods for production thereof |
March 31, 1998 |
| This invention relates to block polymers containing both crystalline and elastomeric blocks, the block copolymer having an A block and a B block. The A block is a polyethylene or an ethylene polymer optionally containing an alpha-olefin and is generally crystalline. The B block contains |
| 5733852 |
Lubricating oil compositions |
March 31, 1998 |
| Copolymers and functionalized copolymers comprising ethylene units, in combination with non ethylene copolymer derivatives, give improved engine piston cleanliness when used as lubricating oil additives. |
| 5733346 |
Oil additives and compositions |
March 31, 1998 |
| Oil-soluble polar nitrogen components are used in combination with fuel oil antifoams to control foaming in fuel oils. |
| 5731486 |
Process for preparing 3-methyl-2-pentene |
March 24, 1998 |
| A method for producing 3-methyl-2-pentene which is substantially free of any other C.sub.6 olefin, except 2-ethyl-1-butene, by first producing a stream that contains 2-ethyl-1-butene from the trimerization of ethylene, and second by recovering the 2-ethyl-1-butene as 3-methyl-2-pentene v |
| 5731443 |
Liquid phthalic anhydride recovery process using a rectification tower |
March 24, 1998 |
| A process for recovering phthalic anhydride as a liquid from a vapor phase oxidation product which comprises mixing the vapor phase oxidation product having a temperature in the range of about 130.degree. C. or greater with a first stream comprising maleic anhydride and/or at least one c |
| 5731273 |
Lubricating compositions |
March 24, 1998 |
| Crankcase lubricant compositions for use in automobile or truck engines comprise a major proportion of a lubricating oil, and an antioxidant system comprising added copper present in oil-soluble form and at least one oil-soluble phenothiazine. |
| 5730844 |
Liquid phthalic anhydride recovery process using a rectification tower with benzoic acid control |
March 24, 1998 |
| A process for recovering phthalic anhydride as a liquid from a vapor phase oxidation product which comprises mixing the vapor phase oxidation product having a temperature of about 130.degree. C. or greater with a first stream comprising maleic anhydride, benzoic acid present in an amount |
| 5728658 |
Biodegradable synthetic ester base stocks formed from branched oxo acids |
March 17, 1998 |
| A biodegradable lubricant which is prepared from: about 60-99% by weight of at least one biodegradable synthetic ester base stock which comprises the reaction product of: a branched or linear alcohol having the general formula R(OH).sub.n, wherein R is an aliphatic or cyclo-aliphatic gro |
| 5726134 |
Multigrade lubricating compositions |
March 10, 1998 |
| Multigrade lubricating oils which have acceptable performance in the VWInTD and Sequence VE engine tests and which are based on an ashless dispersant comprising an oil-soluble polymeric backbone having functional groups in which the hydrocarbon backbone is derived from an ethylene alpha- |
| 5723560 |
Higher molecular weight amorphous polypropylene |
March 3, 1998 |
| An amorphous polypropylene having a high weight average molecular weight prepared by a process in the presence of a catalyst comprising titanium-containing monocyclopentadienyl metallocene and aluminoxane. |
| 5723545 |
Blends of a semi-crystalline polymer and elastic .alpha.-olefin/cyclic olefin copolymers |
March 3, 1998 |
| Blends of semi-crystalline polymers with rubbery thermoplastic copolymers are provided. The rubbery thermoplastic copolymers are elastic at temperatures above their Tg's and properties similar to thermoplastic elastomers and surface tensions 5 dynes/cm or more different, preferably g |
| 5723397 |
Molecular sieve layers and processes for their manufacture |
March 3, 1998 |
| Molecular sieve layers on a support are deposited from a synthesis solution while increasing the solution temperature. |
| 5723217 |
Polyolefin fibers and their fabrics |
March 3, 1998 |
| Novel fibers have been made from reactor grade isotactic poly-alpha-olefin wherein polypropylene is produced by single-site catalysis and has a melt flow rate of greater than zero to about 5,000, MWD in the range of about 1.0 to about 3.5. |
| 5721184 |
Method for making supported catalyst systems and catalyst systems therefrom |
February 24, 1998 |
| Catalyst systems and methods for supporting catalysts and their components, particularly metallocene catalyst components, are provided. The method involves techniques for evenly distributing a small volume of catalyst component over and among a porous support material. Such even distribu |
| 5719109 |
Lubricating oil composition |
February 17, 1998 |
| The present invention provides a lubricating oil composition excellent in wear-resistant properties and frictional characteristics. The present invention relates to a lubricating oil composition containing a lubricating base oil(A) a complex obtained by reacting a metallic salt of dithio |
| 5719107 |
Crankcase lubricant for heavy duty diesel oil |
February 17, 1998 |
| Thus, the instant invention is directed toward an oil for diesel engines comprising an admixture of (A) a major amount of an oil of lubricating viscosity, (B) at least 4 mass % dispersant, (C) at least 0.3 mass % of a metal phenate, (D) less than 0.1 mass % friction modifier, (E) less th |
| 5718808 |
Solvent assisted process for recovery of phthalic anhydride in the liquid phase by distillation |
February 17, 1998 |
| A process for recovering phthalic anhydride as a liquid from a vapor phase oxidation product which comprises mixing the vapor phase oxidation product having a temperature of about 130.degree. C. or greater with a first stream comprising a solvent having a boiling point in the range betwe |
| 5718734 |
Oil additives and compositions |
February 17, 1998 |
| Compositions comprising (a) an ethylene-mixed unsaturated ester copolymer or (b) two or more ethylene-unsaturated ester copolymers differing in their ester chains improve the low temperature properties of fuel oils. |
| 5717039 |
Functionalization of polymers based on Koch chemistry and derivatives thereof |
February 10, 1998 |
| A Koch functionalized product which is the reaction product of at least one polymer having a number average molecular weight of at least 500 and at least ethylenic double bond per polymer chain, with carbon monoxide and a nucleophilic trapping agent. The invention includes functionalized |
| 5716915 |
Oil compositions |
February 10, 1998 |
| Additives having certain hydrocarbyl groups improve the low temperature properties of hydrocarbon oils. |
| 5714254 |
Low viscosity hot melt pressure sensitive adhesive compositions |
February 3, 1998 |
| A low melt viscosity, hot melt pressure sensitive adhesive composition having enhanced tack properties is provided. The composition is based on an S-I-S block copolymer having polystyrene and polyisoprene block segments blended with a petroleum tackifier resin which is a blend of a C |
