US4376832A
Expired / Lapsed
US
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Catalyst-solvent system for polyester-based polyurethane foams comprising N-butylmorpholine and N,N'-dimethylpiperazine and the solvent
Assignee: Huntsman Corp
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Filing: 1981-12-07
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Granted: 1983-03-15
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Expires: 2001-12-07
Abstract
Abstract N-butylmorpholine and N,N'-dimethylpiperazine may be used together as a catalyst system in an activator solution to give finer, more uniform cells to polyester-based polyurethane foams if a solvent is employed. It was surprisingly discovered that the components must be used together as a catalyst-solvent system to avoid the disadvantages observed when one of the components is changed or left out. For example, if the solvent were not present in the activator solution in proportions of at least 1 wt. %, the activator solution would not be homogeneous.
Inventors
- 👤 George P. Speranza
- 👤 Robert L. Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:04
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/20; C08G18/2009
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
64 words
A catalyst-solvent system for use in reacting an organic polyisocyanate with an organic polyester polyol to produce a polyurethane, the catalyst-solvent system comprising catalytic amounts N-butylmorpholine and N,N'-dimethylpiperazine and a solvent of the formula ##STR2## where n is zero or greater, m is 1 or greater, X and Y are hydrogen or lower alkyl axcept that X and Y cannot both be lower alkyl.
Claim 2
Dependent Claim
64 words
A catalyst-solvent system for use in reacting an organic polyisocyanate with an organic polyester polyol to produce a polyurethane, the catalyst-solvent system comprising catalytic amounts N-butylmorpholine and N,N'-dimethylpiperazine and a solvent of the formula ##STR2## where n is zero or greater, m is 1 or greater, X and Y are hydrogen or lower alkyl axcept that X and Y cannot both be lower alkyl.
Claim 3
Dependent Claim
19 words
The catalyst-solvent system of claim 1 in which in the formula for the solvent, n is 3 or greater.
Claim 4
Dependent Claim
20 words
The catalyst-solvent system of claim 2 in which in the formula for the solvent, X and Y are both hydrogen.
Claim 5
Dependent Claim
19 words
The catalyst-solvent system of claim 3 in which in the formula for the solvent, m is 1 or 2.
Claim 6
Dependent Claim
35 words
The catalyst-solvent system of claims 1, 2, 3 or 4 in which N-butylmorpholine is 60 to 85 weight percent, N,N'-dimethylpiperazine is 3 to 15 weight percent and the solvent is 7 to 25 weight percent.
Claim 7
Dependent Claim
71 words
An activator solution for use in reacting with an organic polyisocyanate and an organic polyester polyol to produce a polyurethane, the activator solution comprising one or more surfactants, water, a solvent of the formula ##STR3## where n is zero or greater, m is 1 or greater, X and Y are hydrogen or lower alkyl except that X and Y cannot both be lower alkyl, and catalytic amounts of N-butylmorpholine and N,N'-dimethylpiperazine.
Claim 8
Dependent Claim
71 words
An activator solution for use in reacting with an organic polyisocyanate and an organic polyester polyol to produce a polyurethane, the activator solution comprising one or more surfactants, water, a solvent of the formula ##STR3## where n is zero or greater, m is 1 or greater, X and Y are hydrogen or lower alkyl except that X and Y cannot both be lower alkyl, and catalytic amounts of N-butylmorpholine and N,N'-dimethylpiperazine.
Claim 9
Dependent Claim
19 words
The activator solution of claim 6 in which in the formula for the solvent, n is 3 or greater.
Claim 10
Dependent Claim
20 words
The activator solution of claim 7 in which in the formula for the solvent, X and Y are both hydrogen.
Claim 11
Dependent Claim
19 words
The activator solution of claim 8 in which in the formula for the solvent, m is 1 or 2.
Claim 12
Dependent Claim
53 words
The activator solution of claims 6, 7, 8 or 9 in which N-butylmorpholine makes up 60 to 85 weight percent of the combined catalyst-solvent portion, N,N'-dimethylpiperazine makes up 3 to 15 weight percent of the combined catalyst-solvent portion and the solvent makes up 7 to 25 weight percent of the combined catalyst-solvent portion.
Claim 13
Independent Claim
67 words
A method for producing a polyurethane which comprises reacting an organic polyisocyanate with an organic polyester polyol in the presence of a catalyst-solvent system comprising a catalytic amount of N-butylmorpholine, N,N'-dimethylpiperazine and a solvent of the formula ##STR4## where n is zero or greater, m is 1 or greater, X and Y are hydrogen or lower alkyl except that X and Y cannot both be lower alkyl.
Claim 14
Independent Claim
67 words
A method for producing a polyurethane which comprises reacting an organic polyisocyanate with an organic polyester polyol in the presence of a catalyst-solvent system comprising a catalytic amount of N-butylmorpholine, N,N'-dimethylpiperazine and a solvent of the formula ##STR4## where n is zero or greater, m is 1 or greater, X and Y are hydrogen or lower alkyl except that X and Y cannot both be lower alkyl.
Claim 15
Dependent Claim
18 words
The method of claim 11 in which in the formula for the solvent, n is 3 or greater.
Claim 16
Dependent Claim
19 words
The method of claim 12 in which in the formula for the solvent, X and Y are both hydrogen.
Claim 17
Dependent Claim
18 words
The method of claim 13 in which in the formula for the solvent, m is 1 or 2.
Claim 18
Independent Claim
58 words
The method for producing a polyurethane described in claims 11, 12, 13 or 14 in which N-butylmorpholine makes up 60 to 85 weight percent of the combined catalyst-solvent portion and N,N'-dimethylpiperazine makes up 3 to 15 weight percent of the combined catalyst-solvent portion and the solvent makes up 7 to 25 weight percent of the combined catalyst-solvent portion.
Claim 19
Independent Claim
73 words
A method for producing a polyurethane which comprises reacting an organic polyisocyanate with an organic polyester polyol in the presence of an activator solution comprising one or more surfactants, water, and a solvent of the formula ##STR5## where n is zero or greater, m is 1 or greater, X and Y are hydrogen or lower alkyl except that X and Y cannot both be lower alkyl and catalytic amounts of N-butylmorpholine and N,N'-dimethylpiperazine.
Claim 20
Independent Claim
73 words
A method for producing a polyurethane which comprises reacting an organic polyisocyanate with an organic polyester polyol in the presence of an activator solution comprising one or more surfactants, water, and a solvent of the formula ##STR5## where n is zero or greater, m is 1 or greater, X and Y are hydrogen or lower alkyl except that X and Y cannot both be lower alkyl and catalytic amounts of N-butylmorpholine and N,N'-dimethylpiperazine.
Claim 21
Dependent Claim
18 words
The method of claim 16 in which in the formula for the solvent, n is 3 or greater.
Claim 22
Dependent Claim
19 words
The method of claim 17 in which in the formula for the solvent, X and Y are both hydrogen.
Claim 23
Dependent Claim
18 words
The method of claim 18 in which in the formula for the solvent, m is 1 or 2.
Claim 24
Independent Claim
58 words
The method for producing a polyurethane described in claims 16, 17, 18 or 19 in which N-butylmorpholine makes up 60 to 85 weight percent of the combined catalyst-solvent portion and N,N'-dimethylpiperazine makes up 3 to 15 weight percent of the combined catalyst-solvent portion and the solvent makes up 7 to 25 weight percent of the combined catalyst-solvent portion.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-14 | 1986-09-13 | 1987-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-14 | 1990-09-13 | 1991-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-14 | 1994-09-13 | 1995-03-15 | $7700.00 | Window Closed / Lapsed |