Polyacrylate antifoam components for use in fuels

Abstract

There is disclosed an antifoam component which includes at least one poly(acrylate) copolymer for use in a fuel. Poly(acrylate) polymers prepared by polymerizing a (meth)acrylate monomer comprising C 1 to C 30 alkyl esters of (meth)acrylic acid (“multifunctional monomer”) are also disclosed. Other poly(acrylate) polymers prepared by polymerizing (i) a (meth)acrylate monomer comprising C 1 to C 4 alkyl esters of (meth)acrylic acid (“solubility monomer”); (ii) a (meth)acrylate monomer comprising C 5 to C 12 alkyl esters of (meth)acrylic acid (“surface tension monomer”); and (iii) optionally at least one additional monomer comprising a solubility monomer, a surface tension monomer, a monomer comprising C 1 to C 30 alkyl esters of (meth)acrylic acid (“multifunctional monomer”), or combinations thereof are also disclosed.

1 - 11 . (canceled) 
     
     
         12 . A composition comprising at least one poly(acrylate) polymer prepared by polymerizing:
 a (meth)acrylate monomer comprising tertiary butyl (meth)acrylate, ethyl (meth)acrylate or combinations thereof (“solubility monomer”); and   (ii) a (meth)acrylate monomer comprising trimethylhexyl (meth)acrylate. 2-ethylhexyl (meth)acrylate or combinations thereof (“surface tension monomer”); and   
       wherein the ratio of the solubility monomer to the surface tension monomer ranges from 98:2 to 80:10. 
     
     
         13 . The composition of  claim 12 , wherein the at least one poly(acrylate) polymer is is prepared by polymerizing:
 (i) a (meth)acrylate monomer comprising tertiary butyl (meth)acrylate (“solubility monomer”);   (ii) a (meth)acrylate monomer comprising trimethylhexyl (meth)acrylate (“surface tension monomer”); and   (iii) at least one additional monomer; and   
       wherein the ratio of the solubility monomer to the surface tension monomer to the at least one additional monomer ranges from 85:5:10 to 80:15:5. 
     
     
         14 . The composition of  claim 13 , wherein the at least one additional monomer comprises 2-ethylhexyl (meth)acrylate. 
     
     
         15 - 23 . (canceled) 
     
     
         24 . The composition of  claim 12 , wherein the at least one poly(acrylate) polymer has a weight average molecular weight (“M w ”) from 10,000 to 350,000 Da. 
     
     
         25 . The composition of  claim 12 , further comprising a fuel and wherein the at least one poly(acrylate) polymer is present in the fuel in an amount from 0.1 ppm to 3000 ppm by weight, based on a total weight of the fuel and composition. 
     
     
         26 . The composition of  claim 25 , wherein the at least one poly(acrylate) polymer is present in the fuel in an amount from 1 ppm to 100 ppm by weight, based on a total weight of the of the fuel and composition. 
     
     
         27 . (canceled) 
     
     
         28 . A method of reducing foam in a fuel, said method comprising adding the composition of  claim 12  to a fuel. 
     
     
         29 - 30 . (canceled) 
     
     
         31 . A method of reducing the amount of foam produced while filling the fuel tank of a vehicle, said method comprising adding the composition of  claim 12  to a fuel. 
     
     
         32 - 36 . (canceled) 
     
     
         37 . A fuel additive package comprising:
 (i) at least one quaternary ammonium salt;   (ii) at least one hydrolyzed polyisobutylene succinic anhydride (PIBSA), polyisobutylene succinic acid, or combinations thereof;   (iii) at least one demulsifier;   (iv) at least one antifoam component comprising the composition of claim.   
     
     
         38 . A method of reducing foam in a fuel, said method comprising adding the fuel additive package of  claim 37  to a fuel. 
     
     
         39 . (canceled)