# US 2009/0260754 A1 · Casting resin for adhesive bonding of fibers

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- Number: US 2009/0260754 A1
- Document ID: US20090260754A1
- Status: Published application
- Kind: A1
- Application number: 12/430,955
- Filed: 2009-04-28
- Published: 2009-10-22
- Earliest claimed: 2006-10-30
- Inventors: ANDRE TE POEL
- Web page: https://patentgrep.com/patent/US20090260754A1

## CPC

- C08G 18/36: Hydroxylated esters of higher fatty acids
- C08G 18/3206: {aliphatic}
- C08G 18/69: Polymers of conjugated dienes {(hydrogenated polymers of conjugated dienes C08G18/6208)}
- C08G 18/7664: {containing alkylene polyphenyl groups}
- C08K 3/34: Silicon-containing compounds
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

The invention relates to a liquid 2K polyurethane composition of a polyol component A comprising at least one hydrophobic polyol with a molecular weight>300 g/mol and a hydrophilic polyol with a molecular weight<500 g/mol, and 1 to 50 wt. % of a powdered molecular sieve as well as a polyisocyanate or an NCO-reactive PU-prepolymer. In addition, a process is described for casting plastic or metallic moldings, particularly membrane substrates, by the use of an inventive 2K polyurethane composition.

## Claims

### Claim 1

A crosslinkable, liquid 2K polyurethane composition comprising:
a) component A which comprises a mixture of (i) at least one hydrophobic polyol with a molecular weight greater than 300 g/mol, (ii) at least one low molecular weight hydrophilic polyol with a molecular weight lower than 500 g/mol, and (iii) 1 to 50 wt. %, based on component A, of a powdered molecular sieves; and
b) component B which comprises at least one polyisocyanate and/or an NCO-reactive polyurethane prepolymer.

### Claim 2 (depends on 1)

The 2K polyurethane composition according to claim 1, wherein the hydrophobic polyol is selected from the oleo chemical polyols, OH-containing polybutadienes with a molecular weight greater than 500 g/mol or mixtures thereof.

### Claim 3 (depends on 1)

The 2K polyurethane composition according to claim 1, wherein (iii) of the component A comprises 5 to 40 wt. % of the powdered molecular sieves with a particle size between 0.5 to 100 μm.

### Claim 4 (depends on 1)

The 2K polyurethane composition according to claim 1, wherein the low molecular weight hydrophilic polyol is a hydric polyol having three to six —OH groups with a molecular weight below 300 g/mol.

### Claim 5 (depends on 1)

The 2K polyurethane composition according to claim 1, wherein the component B is an aromatic isocyanate and/or a corresponding isocyanate-reactive polyurethane prepolymer.

### Claim 6 (depends on 1)

The 2K polyurethane composition according to claim 1, in which no aminofunctional group is present.

### Claim 7 (depends on 1)

The 2K polyurethane composition according to claim 1, further comprising a catalyst.

### Claim 8 (depends on 1)

The 2K polyurethane composition according to claim 1, wherein the composition has a viscosity between 200 and 5000 mPas at the application temperature.

### Claim 9 (depends on 1)

The 2K polyurethane composition according to claim 1, wherein the component A comprises 30 to 80 wt. % hydrophobic polyols, 0.5 to 10 wt. % low molecular weight hydrophilic polyols, 5 to 40 wt. % molecular sieve powder, and up to 7.5 wt. % low molecular diols, wherein the sum equals to 100%.

### Claim 10 (depends on 1)

A process for gluing a plastic, metallic fibers or membranes comprising:
a) delivering the plastic, the metallic fibers or the membranes to an external mold,
b) applying the liquid 2K polyurethane composition of claim 1 between the parts to be glued, and
c) curing the liquid 2K polyurethane composition at a temperature below 150° C.

### Claim 11 (depends on 10)

The process according to claim 10, wherein the metallic fibers are natural or synthetic polymers.

### Claim 12 (depends on 11)

The process according to claim 11, wherein the metallic fibers are hollow fibers with polymeric membrane surfaces.

### Claim 13 (depends on 12)

The process according to claim 12, wherein the fibers are cleaned or treated with a H-acidic solvent before delivering them to the external mold and without drying them.

### Claim 14 (depends on 10)

The process according to claim 10, wherein the external mold is removed after curing.

### Claim 15 (depends on 10)

The process according to claim 10, further comprising a sterilization step.

### Claim 16 (depends on 1)

A molded object comprising the 2K polyurethane composition of claim 1.