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US 8,119,581 B2Granted
Use of crosslinked microgels for modifying the temperature-dependent behavior of non-crosslinkable organic media
AssigneesRhein Chemie Rheinau GmbH, LANXESS Deutschland GmbH
InventorsAchim Fessenbecker, Patrick Galda, Torsten Ziser, Thomas Früh, Werner Obrecht
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Abstract
The invention relates to the use of microgels for modifying the temperature behavior of non-crosslinkable organic media, in particular in high temperature applications at least about 100° C., for example in engine oils, gear oils, etc.
Claims24
A process for modifying the temperature-dependent behavior of a non-crosslinkable organic media (A) comprising:
- adding crosslinked microgels (B) to the non-crosslinkable organic media (A), thereby forming a modified non-crosslinkable organic media composition capable of use at temperatures of at least 100° C.,
- wherein the non-crosslinkable organic medium (A) is selected from the group consisting of:
- saturated hydrocarbons, aromatic hydrocarbons, mineral oils, synthetic hydrocarbon oils, natural ester oils, synthetic ester oils, polyether oils, polyether ester oils, and phosphoric acid esters,
- further wherein the non-crosslinkable organic medium (A) has a viscosity of less than 200 mPas at a temperature of 120° C.,
- wherein the non-crosslinkable organic medium (A) has a characteristic number that is increased by at least 10% via the adding of the crosslinked microgels (B),
- said characteristic number being calculated according to the formula (I):
- characteristic number=[(L−U)/(L−H)]×100 (I)
- where L is the kinematic viscosity at 40° C. of a reference medium with a characteristic number 0, which has the same kinematic viscosity at 100° C. as the non-crosslinkable organic medium (A), H is the kinematic viscosity at 40C of a reference medium with a characteristic number 100, which has the same kinematic viscosity at 100° C. as the non-crosslinkable organic medium (A), and U is the kinematic viscosity at 40° C. of the non-crosslinkable organic medium (A), and
- further wherein the crosslinked microgels (B) comprise primary particles having an average particle diameter of 5 to 500 nm.
6 more elements
A process for modifying the temperature-dependent behavior of a non-crosslinkable organic media (A) comprising:
- adding crosslinked microgels (B) to the non-crosslinkable organic media (A), thereby forming a modified non-crosslinkable organic media composition capable of use at temperatures of at least 100° C.,
- wherein the non-crosslinkable organic medium (A) is selected from the group consisting of:
- saturated hydrocarbons, aromatic hydrocarbons, mineral oils, synthetic hydrocarbon oils, natural ester oils, synthetic ester oils, polyether oils, polyether ester oils, and phosphoric acid esters,
- wherein the non-crosslinkable organic medium (A) has a characteristic number that is increased by at least 10% via the adding of the crosslinked microgels (B),
- said characteristic number being calculated according to the formula (I):
- characteristic number=[(L−U)/(L−H)]×100 (I)
- where L is the kinematic viscosity at 40° C. of a reference medium with a characteristic number 0, which has the same kinematic viscosity at 100° C. as the non-crosslinkable organic medium (A), H is the kinematic viscosity at 40C of a reference medium with a characteristic number 100, which has the same kinematic viscosity at 100° C. as the non-crosslinkable organic medium (A), and U is the kinematic viscosity at 40° C. of the non-crosslinkable organic medium (A), and
- further wherein the crosslinked microgels (B) comprise primary particles having an approximately spherical geometry.
5 more elements
A process for modifying the temperature-dependent behavior of a non-crosslinkable organic media (A) comprising:
- adding crosslinked microgels (B) to the non-crosslinkable organic media (A), thereby forming a modified non-crosslinkable organic media composition capable of use at temperatures of at least 100° C.,
- wherein the non-crosslinkable organic medium (A) is selected from the group consisting of:
- saturated hydrocarbons, aromatic hydrocarbons, mineral oils, synthetic hydrocarbon oils, natural ester oils, synthetic ester oils, polyether oils, polyether ester oils, and phosphoric acid esters,
- wherein the non-crosslinkable organic medium (A) has a characteristic number that is increased by at least 10% via the adding of the crosslinked microgels (B),
- said characteristic number being calculated according to the formula (I):
- characteristic number=[(L−U)/(L−H)]×100 (I)
- where L is the kinematic viscosity at 40° C. of a reference medium with a characteristic number 0, which has the same kinematic viscosity at 100° C. as the non-crosslinkable organic medium (A), H is the kinematic viscosity at 40C of a reference medium with a characteristic number 100, which has the same kinematic viscosity at 100° C. as the non-crosslinkable organic medium (A), and U is the kinematic viscosity at 40° C. of the non-crosslinkable organic medium (A), and
- further wherein the crosslinked microgels (B) comprise a plurality of primary particles and wherein a deviation of the diameter of an individual primary particle is less than 250%, said diameter of an individual primary particle defined as being equal to
- [(d1−d2)/d2]×100,
- wherein d1 and d2 are two arbitrary diameters of an arbitrary layer of the primary particles and d1>d2.
7 more elements
Dependencies are inferred from the claim text.