Formulations of random polymers for improving crude petroleum flow

A method for producing random polyacrylate-polyacetate polymers, wherein said method comprises a semi-continuous emulsion polymerization process in a main reactor by feeding a pre-emulsion of acrylate and acetate monomers and a transfer agent to the main reactor at a rate of 0.003 to 0.009 g/mL·min, at a reaction temperature of 50 to 90° C., the amount of monomers is between 5 and 95% by weight, and the amount of transfer agent is up to 12 grams per 100.0 grams of monomers, wherein said random polymer formulation comprises random copolymers having the formula:

• where:
• R2, R3 and R4 are represented by independent radical groups listed below:
• R2=H, CH3;
• R3=CH3, C2H5, C4H9, C6H13, C8H17, C10H21, C12H25, C18H37;
• R4=H, CN;
• u=from 1 to 220;
• and
• v=from 1 to 50.

A method for producing random polystyrene-polyacrylate-polyacetate terpolymers, wherein said method comprises a semi-continuous emulsion polymerization process in a main reactor by feeding a pre-emulsion of styrene, acrylate and acetate monomers and a transfer agent to the main reactor at a rate of 0.003 to 0.009 g/mL-min, at a reaction temperature of 50 to 90° C., the amount of monomers is between 5 and 95% by weight, and the amount of transfer agent is up to 12 grams per 100.0 grams of monomers, wherein said random polymer formulation comprises a random terpolymer having the formula:

• where:
• R1, R2, R3 and R4 are represented by independent radical groups listed below:
• R1=C6H5, CH3C6H4, (CH3)2C6H3, (CH3)3C6H2, (CH3)3CC6H4;
• R2=H, CH3;
• R3=CH3, C2H5, C4H9, C6H13, C8H17, C10H21, C12H25, C18H37;
• R4=H, CN;
• x=from 2 to 900;
• Z=from 1 to 300;
• y=from 1 to 226.

A process for producing a random polymer or copolymer selected from the group consisting of

• where:
• R1, R2 and R4 are represented by independent radical groups listed below:
• R1=C6H5, CH3C6H4, (CH3)2C6H3, (CH3)3C6H2, (CH3)3CC6H4;
• R2=H, CH3;
• R3=CH3, C2H5, C4H9, C6H13, C8H17, C10H21, C12H25, C18H37;
• R4=H, CN;
• m=from 10 to 700;
• n=from 1 to 220;
• u=from 1 to 220;
• v=from 1 to 50;
• x=from 2 to 900;
• y=from 1 to 226;
• z=from 1 to 300;
• said method comprising the steps of preparing a reaction mixture of monomers selected from the group consisting of acrylate, styrene, and acetate monomers, at least one surfactant, a transfer agent and a buffer solution, and feeding said reaction mixture into a reactor at a temperature of about 50 to 95° C. at a rate of about 0.003 to 0.009 g/ml·min to obtain said random polymer or copolymer,
• the reaction mixture including said at least one monomer in an amount of 5 to 95% by weight and the amount of the transfer agent in an amount of up to 12 grams per 100 grams of the at least one monomer, wherein said random polymer is effective in reducing the viscosity and depressing the pour point of crude oil having an API gravity of 9 to 30° API.

A method for producing random polystyrene-polyacrylate polymers, wherein said method comprises a semi-continuous emulsion polymerization process in a main reactor by feeding a pre-emulsion of styrene and acrylate monomers and a transfer agent to the main reactor at a rate of from 0.003 to 0.009 g/mL-min, at a reaction temperature of 50 to 90° C., the amount of monomers is between 5 and 95% by weight, and the amount of transfer agent is up to 12 grams per 100.0 grams of monomers, wherein said random polymer formulation comprises random copolymers having the formula:

• where,
• R1=C6H5, CH3C6H4, (CH3)2C6H3, (CH3)3C6H2, (CH3)3CC6H4;
• R2=H, CH3;
• R3=CH3, C2H9, C4H9, C6H13, C8H17, C10H21, C12H25, C18H37;
• p=from 1 to 700;
• q=from 1 to 50.