# US 11,299,560 B2 · Elastomeric ionomers for additive manufacturing

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- Number: US 11,299,560 B2
- Document ID: US11299560B2
- Status: Granted
- Kind: B2
- Application number: 16/781,643
- Filed: 2020-02-04
- Published: 2020-08-06
- Granted: 2022-04-12
- Earliest claimed: 2019-02-04
- Assignees: The Government of the United States of America, as represented by the Secretary of the Navy
- Applicants: The Government of the United States of America, as represented by the Secretary of the Navy
- Inventors: Riccardo Casalini; James Hemmer; Brian Mason
- Web page: https://patentgrep.com/patent/US11299560B2

## CPC

- C08C 19/42: reacting with metals or metal-containing groups
- C08C 19/28: Reaction with compounds containing carbon-to-carbon unsaturated bonds (graft polymers C08F279/00)
- C08C 19/36: with carboxy radicals
- C08L 9/00: Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L 13/00: Compositions of rubbers containing carboxyl groups
- B33Y 70/00: Materials specially adapted for additive manufacturing
- B33Y 80/00: Products made by additive manufacturing
- C08C: TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING

## Abstract

Disclosed is a method of: providing a solution having a solvent, a polybutadiene, and an acrylate; and functionalizing the polybutadiene with the diacrylate to produce an ionic polymer. The polymer may be useful as an additive manufacturing binder.

## Claims

### Claim 1

A method comprising:
providing a solution comprising a solvent, a polybutadiene, and an acrylate;
wherein the acrylate and the polybutadiene are dissolved in the solvent; and
functionalizing the polybutadiene with the acrylate to produce a polymer;
wherein the acrylate comprises ionic groups or groups capable of hydrogen bonding to each other;
wherein the polymer comprises the ionic groups or the groups capable of hydrogen bonding to each other.

### Claim 2 (depends on 1)

The method of claim 1, wherein the solvent comprises chloroform and ethanol.

### Claim 3 (depends on 1)

The method of claim 1, wherein the acrylate is zinc acrylate, magnesium acrylate, or hydroxyethylacrylate.

### Claim 4 (depends on 1)

The method of claim 1, further comprising:
evaporating the solvent.

### Claim 5 (depends on 1)

The polymer made by the method of claim 1.

### Claim 6 (depends on 5)

The polymer of claim 5, wherein the polymer contains an average of more than zero and up to 3 functional groups per polymer chain.

### Claim 7 (depends on 5)

A method comprising:
combining the polymer of claim 5 with a crosslinker to produce a printing composition;
extruding the printing composition to form a shaped article; and
crosslinking the polymer with the crosslinker.

### Claim 8 (depends on 1)

The method of claim 1, wherein the functionalization occurs by reaction of a double bond of the acrylate with a double bond of the polybutadiene.