Initiator for surface-based polymerization and use thereof

Patent metadata

Field	Value
Publication number	US-10011674-B2
Application number	US-201615373943-A
Country	US
Kind code	B2
Filing date	Dec 9, 2016
Priority date	Dec 11, 2015
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

Abstract

Disclosed are polymerization initiators as may be utilized for addition of polymers to a substrate surface. The initiators are azo-based initiators that include multi-functionality through addition of multiple anchoring agents to an inner azo group. Disclosed polymerization initiators can be utilized to form high density and high molecular weight polymers on a surface such as a particulate surface. Formed materials can be beneficial in one embodiment in fracking applications, providing composite proppant/polymer materials that can prevent leakage of polymers from a subterranean geologic formation.

First claim

What is claimed:

1. A polymerization initiator comprising the structure of:
X 1 —R 1 -A 1 -N═N-A 2 -R 2 —X 2

in which
A 1 and A 2 are the same as or different from one another and each comprise an attachment group,
R 1 and R 2 are the same as or different from one another and each comprise a linkage group,
X 1 and X 2 are first and second anchoring agents, respectively, wherein X 1 and X 2 are the same as or different from one another and each independently comprises a thiol group, a phosphonate group, or a halogen.

2. The polymerization initiator of claim 1 , wherein A 1 and A 2 have the general structure:

in which
R 3 and R 4 independently comprise H, CN, CH 3 , COOR 6 (R 6 ═H or alkyl), or C 2 H 6 ; and
R 5 is an alkyl group.

3. The polymerization initiator of claim 1 , wherein R 1 and R 2 independently comprise a carbonyl-containing linkage, an amine-containing linkage, a thiol-containing linkage, a phosphonate linkage, an epoxy linkage, an alkene-containing linkage, or are a bond.

4. The polymerization initiator of claim 1 , wherein the first anchoring agent and/or the second anchoring agent comprises a thizoline group.

5. The polymerization initiator of claim 1 , wherein the first anchoring agent and/or the second anchoring agent comprises a succinimide group.

6. A substrate comprising a surface and the polymerization initiator of claim 1 bonded to the surface.

7. A polymerization initiator having the following structure:

8. A substrate comprising the polymerization initiator of claim 7 .

9. A polymerization initiator having the following structure:

10. A substrate comprising the polymerization initiator of claim 9 .

Assignees

• Univ South Carolina

Inventors

• Viswanath Anand
• Benicewicz Brian C
• Bell Michael H

Classifications

• C08G2261/418

  Ring opening metathesis polymerisation [ROMP] · CPC title

• C08F292/00 Primary

  Macromolecular compounds obtained by polymerising monomers on to inorganic materials · CPC title

• C08F120/14

  Methyl esters {, e.g. methyl (meth)acrylate} · CPC title

• C08F4/04 Primary

  Azo-compounds · CPC title

• C08F120/56

  Acrylamide; Methacrylamide · CPC title