# US 2013/0158146 A1 · Polyisocyanate mixtures

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- Number: US 2013/0158146 A1
- Document ID: US20130158146A1
- Status: Published application
- Kind: A1
- Application number: 13/811,088
- Filed: 2011-07-15
- Published: 2013-06-20
- Earliest claimed: 2010-07-20
- Assignees: Bayer Intellectual Property GmbH
- Inventors: Dorota Greszta-Franz; Hans-Josef Laas; Reinhard Halpaap; Dieter Mager; Hans-Ulrich Meier-Westhues
- Web page: https://patentgrep.com/patent/US20130158146A1

## CPC

- C08L 75/04: Polyurethanes
- C08G 18/3876: {containing mercapto groups}
- C08G 18/4211: {derived from aromatic dicarboxylic acids and dialcohols}
- C08G 18/4277: {Caprolactone and/or substituted caprolactone}
- C08G 18/664: {with compounds of group C08G18/3203}
- C08G 18/724: {Combination of aromatic polyisocyanates with (cyclo)aliphatic polyisocyanates}
- C08G 18/7628: {containing at least one isocyanate or isothiocyanate group linked to the aromatic ring by means of an aliphatic group}
- C08G 18/7642: {containing at least two isocyanate or isothiocyanate groups linked to the aromatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate groups, e.g. xylylene diisocyanate or homologues substituted on the aromatic ring}
- C08G 18/765: {alpha, alpha, alpha', alpha', -tetraalkylxylylene diisocyanate or homologues substituted on the aromatic ring}
- C08G 18/7831: {containing biuret groups}
- C08G 18/792: {formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates}
- C08G 18/794: {formed by oligomerisation of aromatic isocyanates or isothiocyanates}
- C08G 18/795: {formed by oligomerisation of mixtures of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates with aromatic isocyanates or isothiocyanates}
- C08G 18/798: {containing urethdione groups}
- G02B 1/041: {Lenses}
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

The invention relates to novel solvent-free, monomer-depleted polyisocyanate mixtures, and to the use thereof for producing light-resistant and weather-resistant polyurethane bodies with high optical refraction and low optical dispersion.

## Claims

### Claim 1

Solvent-free, low-monomer polyisocyanate mixtures A) having a content of isocyanate groups of from 11 to 23 wt. % and a mean isocyanate functionality of at least 2.3, which consist of from 5 to 95 wt. % of at least one polyisocyanate a-1) based on hexamethylene diisocyanate having an NCO content of from 16 to 24 wt. %, and from 5 to 95 wt. % of at least one polyisocyanate a-2) based on araliphatic diisocyanates having an NCO content of from 10 to 22 wt. %.

### Claim 2 (depends on 1)

Polyisocyanate mixtures A) according to claim 1, wherein the polyisocyanates of component a-1) are those with a uretdione, allophanate, isocyanurate and/or iminooxadiazinedione structure, which have a viscosity at 23° C. of from 70 to 1600 mPas and a content of isocyanate groups of from 18 to 24 wt. %.

### Claim 3 (depends on 1)

Polyisocyanate mixtures A) according to claim 1, wherein the polyisocyanates of component a-2) are those with a uretdione, allophanate, isocyanurate, iminooxadiazinedione and/or biuret structure.

### Claim 4 (depends on 3)

Polyisocyanate mixtures A) according to claim 3, wherein the polyisocyanates of component a-2) are those based on m-XDI, p-XDI and/or m-TMXDI having a content of isocyanate groups of from 11 to 21.5 wt. % and a content of monomeric diisocyanates of less than 0.8%.

### Claim 5 (depends on 3)

Polyisocyanate mixtures A) according to claim 3, wherein the polyisocyanates of component a-2) are those based on m-XDI having a content of isocyanate groups of from 15 to 21 wt. % and a content of monomeric m-XDI of less than 0.5%.

### Claim 6 (depends on 1)

Process for the production of light-fast polyurethane compositions comprising solvent-free reacting of
A) the low-monomer polyisocyanate mixtures according to claim 1 with
B) reactants that are reactive towards isocyanate groups and have a mean functionality of from 2.0 to 6.0, optionally with the concomitant use of
C) further auxiliary substances and additives,
while maintaining an equivalent ratio of isocyanate groups to isocyanate-reactive groups of from 0.5:1 to 2.0:1.

### Claim 7 (depends on 6)

Process according to claim 6, wherein the reactants B) that are reactive towards isocyanate groups are hydroxy-, amino- and/or mercapto-functional compounds having a mean molecular weight of from 60 to 12,000.

### Claim 8 (depends on 6)

Process according to claim 6, wherein there are used as the reactants B) that are reactive towards isocyanate groups polyether polyols, polyester polyols, polycarbonate polyols and/or amino polyethers having a mean molecular weight of from 106 to 12,000, polythioether thiols, polyester thiols, sulfur-containing hydroxy compounds and/or low molecular weight hydroxy- and/or amino-functional components having a mean molecular weight of from 60 to 500.

### Claim 9 (depends on 6)

Process according to claim 6, wherein there are used as auxiliary substances and additives catalysts, UV stabilisers, antioxidants and/or mould release agents.

### Claim 10 (depends on 6)

Process according to claim 6, wherein the reacting of the reactants is carried out at a temperature of up to 180° C. and a pressure of up to 300 bar.

### Claim 11 (depends on 6)

Transparent, compact or foamed moulded bodies produced from the light-fast polyurethane compositions obtainable according to claim 6.

### Claim 12 (depends on 6)

A glass substitute comprising the transparent, light-fast polyurethane compositions obtainable according to claim 6.

### Claim 13 (depends on 6)

An optical lense or spectacle lense comprising the transparent, light-fast polyurethane compositions obtainable according to claim 6.