US2025019616A1PendingUtilityA1

Lubricant compositions including polymeric dispersants

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Assignee: DOW GLOBAL TECHNOLOGIES LLCPriority: Dec 6, 2021Filed: Dec 1, 2022Published: Jan 16, 2025
Est. expiryDec 6, 2041(~15.3 yrs left)· nominal 20-yr term from priority
Inventors:Hema Sagar Giddi
C10N 2030/04C10N 2020/06C10M 2221/02C10M 2209/126C10M 2209/103C10M 2201/041C10M 2201/02C10M 161/00C10M 151/02C10M 125/02C10M 119/20C10N 2040/242C10N 2050/015C10N 2050/02C10N 2040/24C10M 2209/101C10N 2020/04C10M 2219/042C10M 2207/10C10M 2209/084C10M 173/02
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Claims

Abstract

A lubricant composition includes water, graphite, a thickener, and a polymeric dispersant comprising monomeric structural units derived from acrylic acid and monomeric structural units derived from 2-acrylamido-2-methylpropane sulfonic acid.

Claims

exact text as granted — not AI-modified
1 . A lubricant composition, comprising:
 water,   graphite;   a thickener, and   a polymeric dispersant comprising monomeric structural units derived from acrylic acid and monomeric structural units derived from 2-acrylamido-2-methylpropane sulfonic acid.   
     
     
         2 . The lubricant composition of  claim 1 , wherein the lubricant composition comprises 20 wt % to 60 wt % water based on a total weight of the lubricant composition. 
     
     
         3 . The lubricant composition of  claim 1 , wherein the lubricant composition comprises 10 wt % to 60 wt % of graphite based on a total weight of the lubricant composition. 
     
     
         4 . The lubricant composition of  claim 3 , wherein the graphite has a D90 particle diameter of from 0.5 μm to 5.0 μm. 
     
     
         5 . The lubricant composition of  claim 1 , wherein the polymeric dispersant has a weight average molecular weight of 3,000 g/mol to 6,000 g/mol as measured according to gel permeation chromatography. 
     
     
         6 . The lubricant composition of  claim 1 , wherein the lubricant composition comprises 0.01 wt % to 1.0 wt % of the dispersant based on a total weight of the lubricant composition. 
     
     
         7 . The lubricant composition of  claim 1 , wherein the polymeric dispersant comprises 20 wt % to 30 wt % of monomeric structural units derived from 2-acrylamido-2-methylpropane sulfonic acid based on a total weight of the polymeric dispersant. 
     
     
         8 . The lubricant composition of  claim 7 , wherein the polymeric dispersant has a weight average molecular weight of 4,000 g/mol to 5,000 g/mol as measured according to gel permeation chromatography 
     
     
         9 . The lubricant composition of  claim 1 , wherein the polymeric dispersant comprises monomeric structural units derived from N-tert-butylacrylamide. 
     
     
         10 . The lubricant composition of  claim 9 , wherein the polymeric dispersant comprises 1 wt % to 30 wt % of the monomeric structural units derived from N-tert-butylacrylamide based on a total weight of the polymeric dispersant.

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