Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7381354 | Flame retardants with high halogen content and low viscosity Flame retardant formulations comprised of at least one bromine-containing polyol are produced by a process which comprises: A) heating a mixture formed from components comprised of (i) tetrabromophthalic anhydride, (ii) at least on... | 06/03/2008 |
| 7361781 | Process for the preparation of 2,3,5-trimethylhydroquinone diacylates 2,3,5-Trimethyl-1,4-hydroquinone diacylates are obtained by reacting 3,5,5-trimethyl-1,4-benzoquinone with an acylating agent in the presence of methane trisulfonic acid as a catalyst. ... | 04/22/2008 |
| 7329772 | Method for the preparation of a hydroxyalkyl hindered phenolic antioxidant A method of making a hindered phenolic antioxidant is disclosed wherein the method comprises: reacting an ester of the formula: wherein ... | 02/12/2008 |
| 7323289 | Bottom anti-reflective coatings derived from small core molecules with multiple epoxy moieties Novel anti-reflective coatings comprising small molecules (e.g., less than about 5,000 g/mole) in lieu of high molecular weight polymers and methods of using those coatings are provided. In one embodiment, aromatic carboxylic acids are used as the chromophores, and ... | 01/29/2008 |
| 7258823 | Flame retardants with high halogen content and low viscosity Flame retardant formulations comprised of at least one bromine-containing polyol are produced by a process which comprises: A) heating a mixture formed from components comprised of (i) tetrabromophthalic anhydride, (ii) at least one aliphatic polyol, an... | 08/21/2007 |
| 7211193 | Processes for the purification of bis(2-hydroxyethyl)terephthalate A method is disclosed for efficiently obtaining BHET of high purity from an EG (ethylene glycol) solution containing crude BHET (bis(2-hydroxyethyl)terephthalate), especially a decomposition product solution obtained by decomposing a polyester containing PET (polyet... | 05/01/2007 |
| 7199275 | Feed pretreating This invention provides for a process for hydrocarbon conversion in which a partially dehydrated hydrocarbon feedstock is contacted with at least two different molecular sieve materials, including a first molecular sieve having a Si/Al molar ratio of less than about... | 04/03/2007 |
| 7166690 | Recycled method for a wasted polyester and reclaimed materials thereof The present invention relates to a method for the recycling waste polyester resins and the reclaimed materials therefrom. The method for recycling waste polyester resins according to one embodiment the present invention comprises (a) depolymerizing waste polyester r... | 01/23/2007 |
| 7045564 | Flame retardants with high halogen content and low viscosity A flame retardant formulation which is the combination of at least (1) at least one bromine-containing polyol flame retardant formed from the reaction of (a) tetrabromophthalic anhydride, (b) an aliphatic polyol, and (c) an epoxide, and (2) at least one aliphatic di... | 05/16/2006 |
| 7022259 | Liquid crystal compounds, preparation thereof, and composition containing the same A liquid crystal compound with high helical twisting power, a method for preparing the same, and a liquid crystal composition containing the same. The liquid crystal compounds include cyclic group chain structures similar to the liquid crystal to serve as the core s... | 04/04/2006 |
| 6855844 | Phtalic anhydride based polyester-ether polyols and double metal cyanide catalyst system for preparing same Disclosed are polyester-ether polyols and their use in urethane prepolymers, urethane foams and non-foam urethane coatings, adhesives, sealants and/or elastomers. Methods for producing such polyester-ether polyols using double metal cyanide catalysts are disclosed, ... | 02/15/2005 |
| 6740686 | Process for the manufacture of polyurethane foam, amine polyesterpolyol used in this process and foam obtained The invention concerns a method for making a polyurethane foam by reacting at least a polyester polyol with at least a polyisocyanate in the presence of a foaming agent and a catalytic agent, such a polyester polyol having been previously obtained by reacting a reac... | 05/25/2004 |
| 6667416 | Method and apparatus for producing polyester polyol, polyester polyol and polyurethane foam To provide a method for producing polyester polyol that can provide a simple process to produce extensively improved production efficiencies and also produce the polyester polyol of stable in quality, an apparatus for producing the polyester polyol produc... | 12/23/2003 |
| 6642407 | Production, purification and polymerization of aromatic dicarboxylic acids This invention provides a process for purifying the crude aromatic dicarboxylic acids produced by oxidation of dialkyl aromatic hydrocarbons and for using the purified acids in the preparation of polyethylene terephthalate, polyethylene naphthalate and ot... | 11/04/2003 |
| 6582626 | Polymerizable compound, polymerizable liquid crystal composition containing the same, and optically anisotropic medium made from the composition A polymerizable compound represented by formula (I): ##STR1## wherein Q1 and Q2 each independently represent a hydrogen atom or a methyl group; p and q each independently represent an integer of 2 to 18; X1 and X2 | 06/24/2003 |
| 6569352 | Phthalic anhydride based polyester-ether polyols and urethane prepolymers produced therefrom Disclosed are polyester-ether polyols and their use in urethane prepolymers, urethane foams and non-foam urethane coatings, adhesives, sealants and/or elastomers. Methods for producing such polyester-ether polyols are disclosed, along with methods for pro... | 05/27/2003 |
| 6407201 | Plasticizers for bowling ball coverstocks The present invention provides a plasticizer compound having the general formula: ##STR1## in which n=1 to 3, R represents a C2 -C8 straight or branched aliphatic hydrocarbon chain or C6 -C10 aromatic or cy... | 06/18/2002 |
| 6329535 | Process for preparing esterified chroman compounds A process for preparing esterified chroman compounds from 2,6,6-trimethylcylohex-2-ene-1,4-dione, wherein the esterified intermediates are reacted directly to give the desired chroman derivatives without an additional purification step.... | 12/11/2001 |
| 6103924 | Process for the preparation of 2,3,5-trimethylhydroquinone diesters Preparation of 2,3,5-trimethylhydroquinone diesters by rearrangement of 2,6,6-trimethylcyclohex-2-ene-1,4-dione (4-oxo-isophorone, ketoisophorone) in the presence of a solid, acid catalyst and an acylating agent, for example carboxylic acid anhydrides or ... | 08/15/2000 |
| 6100374 | Method of purifying crude naphthalenedicarboxlic acid and process for preparing polyethylene naphthalate The process for preparing polyethylene naphthalate according to the invention is intended to obtain polyethylene naphthalate having a low impurity content from naphthalenedicarboxylic acid containing impurities. This process comprises the steps of: mixing... | 08/08/2000 |
| 5908956 | Method for producing trimethylhydroquinone diester This method provides trimethylhydroquinone diester by using a recyclable catalyst which shows high activity and operability in the reaction, while reducing the risk of corrosion of the reactor. The method for the production of 2,5,6-trimethylhydroquinone ... | 06/01/1999 |
| 5414107 | Process for recycling polyethylene terephthalate process residues containing alkali metal organic salts A process for recycling by-products produced from a process for the manufacture of polyethylene terephthalate is disclosed. The process includes the steps of: (a) providing ethylene glycol distillation bottoms from an ethylene glycol recovery unit associa... | 05/09/1995 |
| 5413681 | Process for the recovery of terephthalic acid and ethylene glycol from poly(ethylene terephthalate) A process useful for the recovery of terephthalic acid and ethylene glycol from poly(ethylene terephthalate) or its copolymers. The process is economical, beneficial to the environment and provides polymer grade terephthalic acid and ethylene glycol from ... | 05/09/1995 |
| 5332859 | Process for producing tetrabromophthalic diesters Described is a batchwise process for producing tetrabromophthalic diester flame retardants having consistent product characteristics.... | 07/26/1994 |
| 5328982 | Depolymerization of substantially amorphous polyesters Ester bonds are hydrolyzed in the conversion of substantially amorphous polyesters to their monomeric components, by being contacted with a mixture of (a) an alcohol, such as methanol, or glycol, (b) a polar aprotic solvent such as N-methyl-pyrrolidone or... | 07/12/1994 |
| 5319128 | Production of terephthalate esters by degradative transesterification of scrap or virgin terephthalate polyesters A process for the production of terephthalate diesters having the following formula (I). ##STR1## Substituents R and R' are the same or different and represent a straight chain, branched or cyclic aliphatic group, an aromatic group, an alkaryl g... | 06/07/1994 |
| 5101064 | Production of terephthalate esters by degradative transesterification of scrap or virgin terephthalate polyesters A process for the production of terephthalate diesters having the following formula (I). ##STR1## Substituents R and R' are the same or different and represent a straight chain, branched or cyclic aliphatic group, an aromatic group, an alkaryl g... | 03/31/1992 |
| 5045122 | Ester hydrolysis and depolymerization of polyester and polycarbonate polymers Ester bonds are hydrolyzed, such as in the conversion of polyesters to their monomeric components, by being contacted with a mixture of (a) an alcohol, such as methanol, or glycol, (b) a polar aprotic solvent such as N-methyl-pyrrolidone or dimethyl sulfo... | 09/03/1991 |
| 4943626 | Primary polyether active hydrogen compounds which are prepared from linked, protectively initiated polyalkyleneoxides Polyether active hydrogen compounds having at least two terminal active hydrogen groups on primary carbon atoms are prepared by (a) forming polyoxyalkylene molecules each having at least one active hydrogen precursor, (b) linking at least two of the polyo... | 07/24/1990 |
| 4929749 | Production of terephthalate esters by degradative transesterification of scrap or virgin terephthalate polyesters A process for the production of terephthalate esters having the following general formula (I). ##STR1## Substituents R and R' are the same or different and represent a straight chain or branched alkyl group having from 6 to 15 carbon atoms. The ... | 05/29/1990 |
| 4876378 | Recovery of dialkyl naphthalene-2,6-dicarboxylates from naphthalene-2,6-dicarboxylic acid-containing polyesters A process for the formation and recovery of dialkyl naphthalene-2,6-dicarboxylates from poly-(alkylene naphthalene-2,6-dicarboxylate) polyesters. Alcoholysis of poly(ethylene naphthalene-2,6-dicarboxylate) in the presence of a transesterification cat... | 10/24/1989 |
| 4868324 | Purification of diphenyl phthalates Crude diphenyl phthalates, including isomeric mixtures thereof which are prepared by reacting mixtures of isophthalic and terephthalic acids with phenol, preferably in the presence of an organotitanate, organozirconate, or organostannate catalyst, are pur... | 09/19/1989 |
| 4754053 | Process for preparing alkyl tetrabromophthalates Bis(2-ethyl-1-hexyl) tetrabromophthalate produced by the reaction of tetrabromophthalic anhydride with 2-ethyl-1-hexanol in the presence of titanium isopropoxide catalyst may be purified by contacting the reaction mixture with sodium carbonate decahydrate... | 06/28/1988 |
| 4745211 | Process for the preparation of purified bis(2-hydroxyethyl) ester of 2,6-naphthalenedicarboxylic acid A process for preparation of a purified bis(2-hydroxyethyl) ester of 2,6-naphthalenedicarboxylic acid wherein 2,6-naphthalenedicarboxylic acid is reacted with a catalyst comprised of a tertiary amine and a titanium-containing compound in order to produce ... | 05/17/1988 |
| 4613678 | Esterification of aromatic dicarboxylic acids with cyclic alkylene carbonates Esterification of aromatic dicarboxylic acids with cyclic alkylene carbonates in the presence of organic compounds containing at least one six-membered aromatic nitrogen-containing heterocyclic moiety.... | 09/23/1986 |
| 4578502 | Polyethylene terephthalate saponification process Solid scrap polyethylene terephthalate (PET) resin may be reprocessed by depolymerizing said scrap in the presence of water or methanol, recovering the monomers resulting from the depolymerization reaction and repolymerizing the monomers to form polymeric... | 03/25/1986 |
| 4507475 | Process for purification of crude polyether polyols A process for purifying crude polyether polyols which are prepared by anionic polymerization of alkylene oxides in the presence of basic catalysts. The polyols are mixed with water and ortho-phosphoric acid in certain quantity ratios, an adsorption agent ... | 03/26/1985 |
| 4506091 | Removal of catalyst residues from polyesters A process for preparing esters which comprises reacting a polycarboxylic acid with an excess of alcohol and in the presence of an organotitanate catalyst, treating the crude mixture with a suitable chelate compound, removing the unreacted alcohol and hydr... | 03/19/1985 |
| 4444692 | Process for making hydroxyl terminated liquid polymers Hydroxyl terminated reactive liquid polymers are prepared by reacting ethylene oxide, in presence of an amine catalyst, with a carboxyl terminated reactive liquid polymer serum which contains, in addition to the carboxyl terminated liquid polymer, a solve... | 04/24/1984 |
| 4435592 | Process for the preparation of polyether-ester polyols Polyether-ester polyols are prepared by reacting a crude polyether polyol, tetrahydrophthalic anhydride and an alkylene oxide. These polyols may be used in preparing polyrethane products.... | 03/06/1984 |
