# US 5,344,853 A · Storable polyol mixtures containing mold release agents

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- Number: US 5,344,853 A
- Document ID: US5344853A
- Status: Granted
- Kind: A
- Application number: 08/090,390
- Filed: 1993-07-12
- Granted: 1994-09-06
- Earliest claimed: 1992-07-17
- Assignees: Bayer Aktiengesellschaft
- Inventors: Ulrich Knipp; Wulf von Bonin; Alfred Neuhaus
- Web page: https://patentgrep.com/patent/US5344853A

## CPC

- C08K 5/20: Carboxylic acid amides
- C08G 18/4804: {Two or more polyethers of different physical or chemical nature}
- C08G 18/6677: {having at least three hydroxy groups}
- C08G 18/6688: {with compounds of group C08G18/3271}
- C08K 5/205: Compounds containing [IMAGE cpc-sch-C08K-1010.gif] groups, e.g. carbamates
- C08G 2110/0008: flexible
- C08G 2110/0016: semi-rigid
- C08G 2110/0025: rigid
- C08G 2120/00: Compositions for reaction injection moulding processes
- C08G 2125/00: Compositions for processes using internal mould release agents
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

Polyol mixtures containing a mixture of internal mold release agents which are storage stable are made up of (a) from about 55 to about 95% by weight of a polyol mixture of (1) 30-70% by weight of at least one polyol with an OH value of more than 700 and (2) from about 30 to about 70% by weight of at least one polyol with an OH value of 700 or less than 700 and (b) from about 5 to about 45% by weight of a mixture of internal mold release agents made up of (1) from about 60 to about 95% by weight of at least one salt-like release agent and (2) from about 5 to about 40% by weight of at least one non-salt-like release agent containing an amide NH function or a urethane NH function. Known auxiliaries and additives may optionally be included. These polyol mixtures are useful in the production of rigid, semirigid and flexible polyurethane materials, particularly molded polyurethanes.

## Claims

### Claim 1

A stable composition made up of
a) from about 55 to about 95% by weight, based on total weight of the composition of a polyol mixture made up of
(1) from about 30 to about 70% by weight, based on total weight of polyol mixture, of a polyol having an OH value of more than 700 and
(2) from about 30 to about 70% by weight, based on total weight of polyol mixture, of a polyol having an OH value of 700 or less than 700,
and
b) from about 5 to about 45% by weight, based on total weight of the composition, of a mixture of mold release agents made up of
(1) from about 60 to about 95% by weight, based on total weight of the release agent mixture, of a salt-like release agent and
(2) from about 5 to about 40% by weight, based on total weight of the release agent mixture, of a non-salt-like release agent containing an amide NH or urethane NH function,
and optionally,
c) an auxiliary agent.

### Claim 2 (depends on 1)

The composition of claim 1 in which the polyol mixture a) is made up of
(1) from 40 to 65% by weight of a polyol having an OH value greater than 700 and
(2) from 35 to 60% by weight of a polyol having an OH value less than 700
and the mold release agent mixture b) is made up of
(1) from 70 to 90% by weight of a salt-like release agent and
(2) from 10 to 30% by weight of a non-salt-like release agent containing an amide or urethane CONH function.

### Claim 3 (depends on 1)

The composition of claim 1 which is made up of from about 70 to about 88% by weight of polyol mixture a) and from about 12 to about 30% by weight of internal mold release agent mixture b).

### Claim 4 (depends on 1)

The composition of claim 1 in which at least one auxiliary agent c) is included.

### Claim 5 (depends on 4)

The composition of claim 4 in which the auxiliary agents include at least one agent selected from the group consisting of water, stabilizers and catalysts.

### Claim 6 (depends on 4)

The composition of claim 4 which is made up of from about 70 to about 88% by weight of polyol mixture a) and from about 12 to about 30% by weight of internal mold release agent mixture b) plus auxiliary agent c).

### Claim 7 (depends on 1)

A process for the production of a polyurethane in which the composition of claim 1 is reacted with a polyisocyanate by a reaction injection molding process.

### Claim 8 (depends on 6)

A process for the production of a polyurethane in which the composition of claim 6 is reacted with a polyisocyanate by a reaction injection molding process.