# US 5,710,226 A · Method for forming polymers

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- Number: US 5,710,226 A
- Document ID: US5710226A
- Status: Granted
- Kind: A
- Application number: 08/668,707
- Filed: 1996-06-24
- Granted: 1998-01-20
- Earliest claimed: 1994-10-28
- Assignees: Rohm and Haas Company
- Inventors: Willie Lau
- Web page: https://patentgrep.com/patent/US5710226A

## CPC

- C08F 2/10: Aqueous solvent
- C08F 2/22: Emulsion polymerisation
- C08F 2/24: with the aid of emulsifying agents
- C08F 2/38: Polymerisation using regulators, e.g. chain terminating agents {, e.g. telomerisation}
- C08F 291/00: Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds according to more than one of the groups C08F251/00 - C08F289/00
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS

## Abstract

An aqueous polymerization method is disclosed for forming polymers containing, as polymerized units, at least one monomer having low water solubility, including the steps of: (1) complexing at least one monomer having low water solubility with a macromolecular organic compound having a hydrophobic cavity; and (2) polymerizing in an aqueous system from about 0.1% to about 100%, by weight of the monomer component, based on the total weight of the polymer, of the complexed monomer having low water solubility with from about 0% to about 99.9% by weight, based on the total weight of the polymer, of at least one monomer having high water solubility. The method is also useful for forming aqueous solution polymers having low water solubility. The method is useful for polymerizing, in an aqueous system, aqueous solution polymers or emulsion polymers, particularly random copolymers, of monomer having a low water solubility which heretofore could not be made satisfactorily without the addition of an organic solvent, comonomer or a high level of surfactant to aid in solubilizing the monomer having low water solubility. The method is also useful for improving the efficiency of chain transfer agents having low water solubility used in aqueous solution and emulsion polymerizations.

## Claims

### Claim 1

A reaction mixture, comprising:
(a) at least one macromolecular compound having a hydrophobic cavity;
(b) at least one monomer having low water solubility; and
(c) water;
wherein the reaction mixture is substantially free of organic solvent.

### Claim 2 (depends on 1)

The reaction mixture of claim 1, wherein the macromolecular organic compound having a hydrophobic cavity is selected from the group consisting of cyclodextrin, cyclodextrin derivative, cycloinulohexose, cycloinuloheptose, cycloinuloctose, calyxarene, cavitand and derivatives thereof.

### Claim 3 (depends on 1)

The reaction mixture of claim 1, wherein the macromolecular organic compound having a hydrophobic cavity is selected from the group consisting of .alpha.-cyclodextrin, .beta.-cyclodextrin, .gamma.-cyclodextrin and derivatives thereof.

### Claim 4 (depends on 1)

The reaction mixture of claim 1, wherein the macromolecular organic compound having a hydrophobic cavity is methyl-.beta.-cyclodextrin.

### Claim 5

A complex, comprising:
(a) at least one macromolecular compound having a hydrophobic cavity; and
(b) at least one .alpha.,.beta.-ethylenically unsaturated monomer having low water solubility.

### Claim 6 (depends on 5)

The complex of claim 5, wherein the macromolecular organic compound having a hydrophobic cavity is selected from the group consisting of cyclodextrin, cyclodextrin derivative, cycloinulohexose, cycloinuloheptose, cycloinuloctose, calyxarene, cavitand and derivatives thereof.

### Claim 7 (depends on 5)

The complex of claim 5, wherein the macromolecular organic compound having a hydrophobic cavity is selected from the group consisting of .alpha.-cyclodextrin, .beta.-cylodextrin, .gamma.-cyclodextrin and derivatives thereof.

### Claim 8 (depends on 5)

The complex of claim 5, wherein the macromolecular organic compound having a hydrophobic cavity is methyl-.beta.-cylodextrin.