US4381353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sprayed polyurethane foams employing reactive amines to improve the foam surface
Assignee: Dow Chemical Co
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Filing: 1981-11-02
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Granted: 1983-04-26
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Expires: 2001-11-02
Abstract
Abstract A polyurethane foam formulation for use primarily in sprayed applications has been discovered which provides a smoother than average foam surface. The formulation includes the addition of a primary or secondary mono or polyamine having a hydrogen functionality of two or greater. The compressive strengths of the resultant foams are equivalent to or greater than equivalent formulations without the amines, even though the amines also reduce fluorocarbon loss yielding lower density foams.
Inventors
- 👤 Kenneth G. McDaniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:55
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/66; C08G18/6603; C08G18/6614
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
51 words
A rigid polyurethane foam formulation suitable for spray application comprising a. a polyether or polyester polyol, b. an organic polyisocyanate, c. a halocarbon blowing agent, d. a catalytic amount of a urethane catalyst and e. 1 to 4 weight percent of an alkanolamine surface-improving additive where the alkanolamine additive is diethanolamine.
Claim 2
Dependent Claim
51 words
A rigid polyurethane foam formulation suitable for spray application comprising a. a polyether or polyester polyol, b. an organic polyisocyanate, c. a halocarbon blowing agent, d. a catalytic amount of a urethane catalyst and e. 1 to 4 weight percent of an alkanolamine surface-improving additive where the alkanolamine additive is diethanolamine.
Claim 3
Dependent Claim
51 words
A rigid polyurethane foam formulation suitable for spray application comprising a. a polyether or polyester polyol, b. an organic polyisocyanate, c. a halocarbon blowing agent, d. a catalytic amount of a urethane catalyst and e. 1 to 4 weight percent of an alkanolamine surface-improving additive where the alkanolamine additive is 2-(2-aminoethoxy)ethanol.
Claim 4
Dependent Claim
51 words
A rigid polyurethane foam formulation suitable for spray application comprising a. a polyether or polyester polyol, b. an organic polyisocyanate, c. a halocarbon blowing agent, d. a catalytic amount of a urethane catalyst and e. 1 to 4 weight percent of an alkanolamine surface-improving additive where the alkanolamine additive is 2-(2-aminoethoxy)ethanol.
Claim 5
Dependent Claim
53 words
The rigid polyurethane foam formulation of claim 1 in which the polyol is prepared by reacting from 2 to 3 moles of propylene oxide with one mole of the Mannich reaction product of a mole of phenol or nonylphenol with one or two moles of formaldehyde and one or two moles of diethanolamine.
Claim 6
Dependent Claim
16 words
The rigid polyurethane foam formulation of claim 1 in which the halocarbon blowing agent is trichlorofluoromethane.
Claim 7
Dependent Claim
68 words
A cured rigid polyurethane foam having a smooth surface being produced by the process of spraying a polyurethane foam formulation comprising a. a polyether or polyester polyol, b. an organic polyisocyanate, c. a halocarbon blowing agent, d. a catalytic amount of a urethane catalyst and e. 1 to 4 weight percent of an alkanolamine surface-improving additive being selected from the group of alkanolamines consisting of 2-(2-aminoethoxy)ethanol and diethanolamine.
Claim 8
Dependent Claim
68 words
A cured rigid polyurethane foam having a smooth surface being produced by the process of spraying a polyurethane foam formulation comprising a. a polyether or polyester polyol, b. an organic polyisocyanate, c. a halocarbon blowing agent, d. a catalytic amount of a urethane catalyst and e. 1 to 4 weight percent of an alkanolamine surface-improving additive being selected from the group of alkanolamines consisting of 2-(2-aminoethoxy)ethanol and diethanolamine.
Claim 9
Dependent Claim
73 words
An improved method for producing a rigid polyurethane foam having a smooth surface comprising spraying a polyurethane foam formulation comprising a. a polyether or polyester polyol, b. an organic polyisocyanate, c. a halocarbon blowing agent, d. a catalytic amount of a urethane catalyst and e. the improvement comprising the inclusion of 1 to 4 weight percent of an alkanolamine surface-improving additive being selected from the group of alkanolamines consisting of 2-(2-aminoethoxy)ethanol and diethanolamine.
Claim 10
Dependent Claim
73 words
An improved method for producing a rigid polyurethane foam having a smooth surface comprising spraying a polyurethane foam formulation comprising a. a polyether or polyester polyol, b. an organic polyisocyanate, c. a halocarbon blowing agent, d. a catalytic amount of a urethane catalyst and e. the improvement comprising the inclusion of 1 to 4 weight percent of an alkanolamine surface-improving additive being selected from the group of alkanolamines consisting of 2-(2-aminoethoxy)ethanol and diethanolamine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-25 | 1986-10-25 | 1987-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-25 | 1990-10-25 | 1991-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-25 | 1994-10-25 | 1995-04-26 | $7700.00 | Window Closed / Lapsed |