# US 2014/0194549 A1 · Method for polymerizing monomer units and/or oligomer units by means of infrared light pulses

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- Number: US 2014/0194549 A1
- Document ID: US20140194549A1
- Status: Published application
- Kind: A1
- Application number: 14/124,480
- Filed: 2012-06-06
- Published: 2014-07-10
- Earliest claimed: 2011-06-07
- Assignees: Freie UniversitäT Berlin
- Inventors: Karsten Heyne; Anja Heyne
- Web page: https://patentgrep.com/patent/US20140194549A1

## CPC

- C08G 18/00: Polymeric products of isocyanates or isothiocyanates
- B01J 19/121: {Coherent waves, e.g. laser beams (lasers per se H01S3/00)}
- B01J 19/128: {Infrared light}
- C08F 2/46: Polymerisation initiated by wave energy or particle radiation
- C08G 18/08: Processes
- C08G 18/3206: {aliphatic}
- C08G 18/7621: {being toluene diisocyanate including isomer mixtures}
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS

## Abstract

A method for polymerizing monomer units and/or oligomer units is disclosed. Said method is characterized in that the energy required for polymerization is introduced into the monomer units and/or oligomer units to be polymerized by means of infrared light pulses, wherein the infrared light pulses have a wavelength of 2500 to 20000 nm, an intensity of more than 1014 W/m2, a duration of more than 8 fs and less than 3 ps and a substantially linear polarization.

## Claims

### Claim 1

A method for polymerizing at least one of monomer units and oligomer units, wherein
energy required for polymerization is introduced into at least one of the monomer units and the oligomer units to be polymerized by means of infrared light pulses, wherein the infrared light pulses have
a wavelength of 2500 to 20000 nm,
an intensity of more than 1014 W/m2,
a duration of more than 8 fs and less than 3 ps and
a substantially linear polarization.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the infrared light pulses additionally have a negative chirp.

### Claim 3 (depends on 1)

The method according to claim 1, wherein each infrared light pulse sweeps over a spectral range of 2 to 1000 cm−1.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the repetition rate of the infrared light pulses lies between 0.5 kHz and 200 MHz.

### Claim 5 (depends on 1)

The method according to claim 1, wherein multiple superposed infrared light pulses are being used, which differ from each other in each case in at least one parameter.

### Claim 6 (depends on 1)

The method according to claim 1, wherein the superposition of the infrared light pulses takes place by means of at least one optical parametric amplifier.

### Claim 7 (depends on 1)

The method according to claim 1, wherein the polymerization takes place in a localized space which—referring to the propagation direction of the infrared light pulses—is transversely smaller than 10 μm and longitudinally smaller than 20 μm.

### Claim 8 (depends on 1)

The method according to claim 1, wherein the polymerization takes place in a solvent.

### Claim 9 (depends on 1)

The method according to claim 1, wherein a polymerization reaction, taking place spontaneously, with respect to energy, after the required activation energy is provided, is influenced by application of a solvent at a ratio of 1:1 (v/m) to 10:1 (v/m) to at least one of the monomer units and oligomer units to be polymerized in such a way that the polymerization reaction is at the least slowed down.

### Claim 10 (depends on 1)

The method according to claim 1, wherein at least one of the monomer units and the oligomer units to be polymerized are basic units of a plastic material.

### Claim 11 (depends on 1)

The method according to claim 1, wherein the method is executed in such a way that specific areas of a produced polymer have a higher degree of polymerization than other areas of the polymer.

### Claim 12 (depends on 10)

The method according to claim 10, wherein the method is executed in such a way that a plastic material is produced which has at least an elastic area and at least a plastic area.

### Claim 13 (depends on 1)

The method according to claim 1, wherein a produced polymer has anisotropic properties which in a first direction of the polymer are 50% higher or lower than the properties in a second direction.

### Claim 14

(canceled)

### Claim 15 (depends on 1)

The method according to claim 1, wherein a micro-structured polymer is produced.

### Claim 16 (depends on 5)

The method according to claim 5, wherein the superposed infrared light pulses differ from each other regarding at least one of their spectral ranges and their polarization.