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| Number | Title | Issue Date |
| 7943789 | Alkenylsuccinic anhydride composition and method of using the same The invention relates to an aqueous sizing composition comprising (a) an emulsion comprising an alkenylsuccinic anhydride component containing alkenylsuccinic anhydride particles suspended in a first starch component containing emulsifying starch selected from the g... | 05/17/2011 |
| 7429309 | Coating compositions comprising alkyl ketene dimers and alkyl succinic anhydrides for use in paper making Additives for paper making are disclosed herein. Specifically, the additives are wax-free alternatives to conventional coatings, including ASA, AKD and optionally an acrylic containing composition. Other additives may be included in the coating, such as cationic par... | 09/30/2008 |
| 7399879 | Process for preparing alkylidene-substituted-1,4-dions derivatives A process for the preparation of a monoalkylidene substituted 1,4-dions derivatives of formula (Ia) or (Ib) or a mixture of (Ia) and (Ib): wherein: R1, R2 and R3, equal to or different from each other, are hydrogen atoms or C1 | 07/15/2008 |
| 7339007 | Low sediment process for thermally reacting highly reactive polymers and enophiles A process for forming an ene reaction product wherein an enophile, such as maleic anhydride, is reacted with reactive polyalkene having a terminal vinylidene content of at least 30 mol. %, at high temperature in the presence of a free radical inhibitor. The polyalke... | 03/04/2008 |
| 6939976 | Process for making allyl succinic anhydride A process for the production of allyl succinic anhydride comprising reacting a mixture of propene with maleic anhydride in the presence of a catalyst comprised of an alkyl tin chloride as provided. The process can be run efficiently at temperatures below about 200°... | 09/06/2005 |
| 6933351 | Process for forming polyalkenyl acylating agents A process for producing polyalkenyl acylating agent, wherein, upon completion of the thermal reaction of a polyalkene and an unsaturated mono- or dicarboxylic acid or anhydride compound, the reaction mixture is allowed to cool to below the reaction temperature, an a... | 08/23/2005 |
| 6348132 | Alkenyl succinic anhydride compositons and the use thereof Novel alkenyl succinic anhydride (ASA) compositions and the use thereof. The disclosed ASA compositions may be derived from maleic anhydride and olefins having desirable carbon chain lengths and double bond distributions. The present ASA compositions prov... | 02/19/2002 |
| 6231659 | Sizing agents and starting materials for their preparation The sizing agents are mixtures of alkenyl succinic anhydrides in which the alkenyl groups have in the range of about 6 to about 40 carbon atoms, and in which at least 97 wt % of the alkenyl groups are bifurcated on the alpha carbon atom into two branches ... | 05/15/2001 |
| 5939562 | Alkenyl substituted cyclic carboxyl acid anhydrides and their application in hydrophobic paper sizing The invention relates to alkene-substituted cyclic carboxylic acid anhydrides which are formed from the reaction of a cyclic carboxylic acid anhydride, including succinic anhydride, and an olefin blend. The olefin blend is made up of internal linear and b... | 08/17/1999 |
| 5885944 | Low chlorine polyalkylene substituted carboxylic acylating agent compositions and compounds derived therefrom Polyalkylene substituted carboxylic acylating agents which contain chlorine are synthesized by chlorine induced condensation of polyalkylenes and -ଲ unsaturated carboxylic groups are treated with sulfur to reduce chlorine content of the carbo... | 03/23/1999 |
| 5739355 | Process for production of polyisobutenylsuccinic anhydrides without formation of resins An alkenyl anhydride or polyalkenylsuccinic anhydride is prepared without forming resins, by an ene-synthesis reaction between an olefin or a polyolefin and a maleic anhydride, optionally substituted by one or two methyl groups, in an aromatic solvent tha... | 04/14/1998 |
| 5646215 | Polybutylene containing reactive unsaturated functionality The invention relates to a functionalized polybutylene polymer which contains at least one unsaturated group in its molecule, said functionalized polybutylene being prepared by reacting (A) an anhydride-functional polybutylene with (B) an allyl-functional... | 07/08/1997 |
| 5461054 | Anthracene-spiro-pyrrolindines The anthracene-spiro-pyrrolidines according to the invention are prepared by reacting either anthracene-spiro-furans or unsubstituted anthracene-spiropyrrolidines with appropriately substituted amines or by reacting unsubstituted anthracene derivatives wi... | 10/24/1995 |
| 5454964 | Substituted acylating agents This invention relates to a process for producing substituted acylating agents by the reaction of an enophile with an ene by the thermal route wherein (a) the molar ratio of the enophile to the ene is at least 3:1 and (b) the reaction pressure is raised t... | 10/03/1995 |
| 5420303 | Process for the maleation of polyethylene waxes A process for the preparation of a maleated polyethylene wax is disclosed. This process entails mixing in the melt phase polyethylene, maleic anhydride, free radical initiator and a chain transfer agent m-di-isopropylbenzene. This process can be a continu... | 05/30/1995 |
| 5420207 | Preparation of polyisobutylsuccinic anhydrides Polyisobutylsuccinic anhydrides having an average molar ratio of succinic anhydride groups to polyisobutyl groups of from 1.05:1 to 1.3:1 are prepared by reacting polyisobutene having an average molecular weight Mw of 600-5000 and containing at... | 05/30/1995 |
| 5041622 | Three-step process for making substituted carboxylic acids and derivatives thereof An improvement in known processes for preparing substituted carboxylic acids useful as acylating agents which comprise reacting (A) at least one aliphatic polymer of one or more lower olefins with (B) an acidic reactant selected from the group consisting ... | 08/20/1991 |
| 5021169 | Alkenyl succinic anhydrides process Alkenyl succinic anhydrides having a decreased amount of tar and color bodies are made by the reaction of an olefin with maleic anhydride in the presence of a tri-orthoalkylphenyl phosphite and optionally a hindered phenolic antioxidant such as 2,4,6-tri-... | 06/04/1991 |
| 4958034 | Alkenyl succinic anhydrides process Alkenyl succinic anhydrides having a decreased amount of tar and color bodies are made by the reaction of an olefin with maleic anhydride in the presence of an arylfluorophosphite (e.g. 2,2'-ethylidenebis(4,6-di-tert-butylphenyl) fluorophosphite) and ... | 09/18/1990 |
| 4956478 | Method for the production of alkenyl-succinic anhydrides This method which involves reacting maleic anhydride and -olefins in an autoclave at about 200°-250° C. gives particularly good results and produces alkenyl-succinic anhydrides which need not be purified by distillation when using, as the startin... | 09/11/1990 |
| 4885311 | Topical transretinoids for treatment of acne and skin diseases Esters and amides of 13-trans-retinoic acid are disclosed which are used for the treatment of acne and skin diseases.... | 12/05/1989 |
| 4883886 | Process for manufacturing polyalkenyl succinic anhydrides A process in which a polymer of a C2 -C8 olefin having a number average molecular weight of about 250 and 30,000 undergoes reaction with an unsaturated aliphatic dicarboxylic acid anhydride in two stages in the presence of 5-500 ppm,... | 11/28/1989 |
| 4879394 | Reaction of olefins with maleic anhydride Olefinically unsaturated hydrocarbons are reacted with maleic anhydride to form the corresponding succinic anhydride in the presence of an alkoxide of zinc or dialkyl zinc which prevents side-reactions. These products are used for the preparation of antic... | 11/07/1989 |
| 4761488 | Reaction of olefins with maleic anhydride Olefinically unsaturated hydrocarbons are reacted with maleic anhydride to form the corresponding succinic anhydride, in the presence of an additive, aluminum acetylacetonate, which prevents side reactions. These products are used for the preparation of a... | 08/02/1988 |
| 4736044 | Boron compounds to inhibit formation of tar during the "ene" reaction of an ethylenically unsaturated alpha, beta dicarboxylic acid compound and an ethylenically unsaturated hydrocarbon A process for the production of a substituted alpha, beta dicarboxylic acid compound substantially free of tar and other resinous reaction byproducts comprising the reaction at conditions favoring the ENE reaction of an ethylenically unsaturated hydrocarb... | 04/05/1988 |
| 4691030 | Process for preparation of alkenylsuccinic anhydrides An alkenylsuccinic anhydride having a high quality is obtained at a low temperature in a high yield by subjecting an olefin having 2 to 90 carbon atoms and maleic anhydride to addition reaction under heating in the presence of a solid acid/base catalyst.... | 09/01/1987 |
| 4677120 | Topical prodrugs for treatment of acne and skin diseases Esters and amides of 13-cis-retinoic acid are disclosed which are used for the treatment of acne and skin diseases.... | 06/30/1987 |
| 4664834 | Hydrocarbyl-substituted succinic acid and/or anhydride/amine terminated poly(oxyalkylene) reaction products, and aqueous systems containing same A composition is disclosed which comprises a water-dispersible reaction product of (A) at least one compound represented by the formula ##STR1## wherein R is a hydrocarbyl group of from about 8 to about 40 carbon atoms, with (B) at least one water-di... | 05/12/1987 |
| 4599433 | Reaction of olefins with maleic anhydride Olefinically unsaturated hydrocarbons, in particular dimeric or polymeric isobutene derivatives, which have a mean number average molecular weight Mn of from 100 to 3000, are reacted with maleic anhydride in a molar ratio of maleic anhydride to... | 07/08/1986 |
| 4599432 | Process for preparing a composition containing an alkenyl succinic anhydride A process for preparing a composition containing an alkenyl succinic anhydride, which comprises subjecting an olefin and maleic anhydride to a thermal addition reaction, followed by addition of a peroxide to cause unreacted olefin and maleic anhydride to ... | 07/08/1986 |
| 4596867 | Disubstituted maleic anhydride compounds Di-substituted maleic anhydride compounds are disclosed of the structural formula ##STR1## wherein R and R1 are selected from the group consisting of aliphatic and phenyl moieties, and R2 is a divalent aromatic moiety. Poly... | 06/24/1986 |
| 4581464 | Preparation of alkenyl succinic anhydrides A process for producing alkenyl succinic anhydrides by the reaction of an olefin with maleic anhydride in the presence of alkyl succinic anhydride is provided. The alkenyl succinic anhydrides are valuable precursors for the preparation of alkyl succinic a... | 04/08/1986 |
| 4576680 | Method of sizing paper An internal sizing agent for paper making which produces excellent sizing effect and which can be used in neutral to alkaline regions without the ordinarily employed fixing agent such as aluminum sulfate. The sizing agent contains a specific reaction prod... | 03/18/1986 |
| 4562264 | Process for the recovery of five-membered ring dicarboxylic acid anhydrides A process for the recovery of five-membered ring dicarboxylic acid anhydrides from aqueous solutions of the corresponding dicarboxylic acids which entails (a) washing the aqueous solution of the dicarboxylic acid with a water-insoluble tertiary amine, and... | 12/31/1985 |
| 4514544 | Paper sizing agent comprised of reaction product of maleic anhydride and propylene oligomers A paper sizing agent is disclosed. The sizing agent is obtained by alkali saponification of a reaction product which is obtained by reacting a propylene oligomer with maleic anhydride under heating in the absence of a catalyst. The propylene oligomer cont... | 04/30/1985 |
| 4496746 | Synthesis of alkenyl saturated aliphatic polycarboxylic acid anhydrides Reaction of maleic acid anhydride with olefin oligomers is facilitated by reacting the maleic acid anhydride in the form of a dispersion or emulsion in a carrier fluid. This minimizes by-product sludge formation.... | 01/29/1985 |
| 4472588 | Production of polyalkenyl succinic anhydrides This invention relates to a process for producing polyalkenyl succinic anhydrides by reacting with continuous agitation a polyalkylene having a number average molecular weight of between 300 and 50,000 with maleic anhydride in a molar ratio of between 0.5... | 09/18/1984 |
| 4450281 | Process for the preparation of a polyalkenyl succinic anhydride Disclosed is a process for the preparation of substituted carboxylic acids and their derivatives in which the synthesis reaction is carried out at least partially thermally in the presence of a furan-type compound. The furan-type compound substantially in... | 05/22/1984 |
| 4434071 | 1,3-Dibromo dialkylhydantoin and olefin oligomer reaction product as a catalyst for preparing alkenyl dicarboxylic acid anhydride Reaction of maleic acid anhydride and polyisobutylene is improved by use, as catalyst, of a complex of polyisobutylene and a 1,3-dibromo dialkylhydantoin.... | 02/28/1984 |
| 4433157 | Process for manufacturing anhydrides of alkenyl dicarboxylic acids A process for manufacturing an alkenyl dicarboxylic acid, anhydride comprises reacting at least one halogenated polyolefin with at least one unsaturated dicarboxylic acid anhydride in substantially stoichiometrical proportion, in the presence of a minor p... | 02/21/1984 |
