IP Library › Granted Patent US 9,944,737
Granted Patent B2
US 9,944,737 · App. 15/537,441 · Granted Apr 17, 2018

Suspensions in aqueous media

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Quick Facts
Patent No.
US 9,944,737
App. No.
15/537,441
Granted
Apr 17, 2018
Kind
B2
Abstract

Provided is a method of suspension polymerization comprising (i) providing a suspension of liquid droplets in an aqueous medium, wherein said droplets comprise (a) one or more water-insoluble vinyl monomers, and (b) a polyelectrolyte (PED) having a polarity, (c) one or more initiators, and wherein said aqueous medium comprises a polyelectrolyte (PEW) having a polarity that is opposite to the polarity of said polyelectrolyte (PED), (ii) polymerizing said vinyl monomer or allowing said vinyl monomer to polymerize.

Claims (12)

1. A method of suspension polymerization comprising

(i) providing a suspension of liquid droplets in an aqueous medium, wherein said droplets comprise

(a) one or more water-insoluble vinyl monomers, and

(b) a polyelectrolyte (PED) having a polarity,

(c) one or more initiators, and

wherein said aqueous medium comprises a polyelectrolyte (PEW) having a polarity that is opposite to the polarity of said polyelectrolyte (PED),

(ii) polymerizing said vinyl monomer or allowing said vinyl monomer to polymerize.

2. The method of claim 1 , wherein the suspension has a pH of 5 to 10.

3. The method of claim 1 , wherein said polyelectrolyte (PED) has negative polarity and said polyelectrolyte (PEW) has positive polarity.

4. The method of claim 1 , wherein said polyelectrolyte (PED) comprises polymerized units of ionic monomer in an amount of 3 mole % to 12 mole %.

5. The method of claim 1 , wherein said polyelectrolyte (PEW) comprises polymerized units of ionic monomer in an amount of 40 mole % to 100 mole %.

6. The method of claim 1 , wherein said polyelectrolyte (PED) is a vinyl polyelectrolyte.

Assignments (5)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 10, 2024
From: DOW GLOBAL TECHNOLOGIES LLC
To: THE DOW CHEMICAL COMPANY
Reel/Frame 069923/0030 →
CHANGE OF LEGAL ENTITY Recorded Sep 10, 2024
From: DDP SPECIALTY ELECTRONIC MATERIALS US, INC
To: DDP SPECIALTY ELECTRONIC MATERIALS US, LLC
Reel/Frame 068907/0881 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 10, 2024
From: ROHM AND HAAS COMPANY
To: DDP SPECIALTY ELECTRONIC MATERIALS US 8, LLC
Reel/Frame 068908/0001 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 10, 2024
From: THE DOW CHEMICAL COMPANY
To: DDP SPECIALTY ELECTRONIC MATERIALS US, INC
Reel/Frame 068922/0001 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 5, 2018
From: ROSENBERG, STEVEN; YU, DECAI; REICHERT, MATTHEW; SCHULTZ, ALFRED K.; SAVO, ANDREW M.; EVEN, RALPH C.; MCINTOSH, LESTER H., III; JOHNSON, ROBERT; FINCH, JOHN DAVID
To: DOW GLOBAL TECHNOLOGIES LLC; ROHM AND HAAS COMPANY
Reel/Frame 045106/0818 →