HYPERBRANCHED POLYESTERS MODIFIED WITH BRANCHED FATTY ACIDS AND THEIR USE AS PARAFFIN INHIBITORS

• Main Authors: LAFUENTE CERDA, Oscar, WOLF, Elena
• Format: Patent
• Language: English; French
• Published: 09.03.2023
• Subjects: ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DYES; FIRELIGHTERS; FUELS; FUELS NOT OTHERWISE PROVIDED FOR; LIQUEFIED PETROLEUM GAS; LUBRICANTS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL GAS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; POLISHES; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K; TECHNICAL GASES CONTAINING CARBON MONOXIDE; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

Hydrophobically modified, hyperbranched polyesters obtainable by a 2-step process of reacting a mixture comprising at least a polyol comprising at least 3 hydroxy groups and a monomer comprising one carboxylic acid group and at least two hydroxy groups, thereby obtaining a hyperbranched polyester comprising terminal hydroxy groups and at least partly esterifying the terminal hydroxy groups with a mixture of carboxylic acids comprising at least linear saturated aliphatic carboxylic acids groups and branched saturated aliphatic carboxylic acids groups. Formulations comprising hydrocarbons and such polyesters and to the use of such hydrophobically modified, hyperbranched polyesters or formulations thereof, as pour- point depressant or wax inhibitor for crude oil. L'invention concerne des polyesters hyperramifiés modifiés de manière hydrophobe pouvant être obtenus par un procédé en deux étapes consistant à faire réagir un mélange comprenant au moins un polyol comprenant au moins 3 groupes hydroxy et un monomère comprenant un groupe acide carboxylique et au moins deux groupes hydroxy, obtenant ainsi un polyester hyperramifié comprenant des groupes hydroxy terminaux et estérifiant au moins partiellement les groupes hydroxy terminaux avec un mélange d'acides carboxyliques comprenant au moins des groupes acides carboxyliques aliphatiques saturés linéaires et des groupes acides carboxyliques aliphatiques saturés ramifiés. Formulations comprenant des hydrocarbures et de tels polyesters et utilisation de tels polyesters hyperramifiés, modifiés de manière hydrophobe, ou de formulations de ceux-ci, en tant qu'abaisseur du point d'écoulement ou inhibiteur de cire pour le pétrole brut.