US4981879A
Expired / Lapsed
US
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Rigid foam with improved "K" factor from perfluorinated hydrocarbons
Assignee: Dow Chemical Co
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Filing: 1989-08-28
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Granted: 1991-01-01
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Expires: 2009-08-28
Abstract
Abstract This invention relates to a process for preparing cellular polymers having urethane groups, isocyanurate groups, or both. The cellular polymers are prepared by reacting an organic polyisocyanate with a polyol in the presence of a blowing agent, a catalyst, and a perfluorinated hydrocarbon or a mixture of perfluorinated hydrocarbons. The use of the perfluorinated additives enhances the thermal insulating properties of the forms.
Inventors
- 👤 Scott C. Snider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:22
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; C08J9/143; C08J9/147; C08J9/148; C08J2375/00; C08J2375/04; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249958; Y10T428/31504; Y10T428/31551
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
68 words
In a process for producing a rigid polyurethane or polyisocyanurate foam from a foam forming mixture comprising an organic polyisocyanate, a polyol, a blowing agent, and a catalyst, the improvement comprising adding to the foam forming mixture a perfluorinated material selected from the group consisting of a perfluorinated hydrocarbon or a mixture of perfluorinated hydrocarbons, the boiling point of the perfluorinated material being less than about 215° C.
Claim 2
Dependent Claim
68 words
In a process for producing a rigid polyurethane or polyisocyanurate foam from a foam forming mixture comprising an organic polyisocyanate, a polyol, a blowing agent, and a catalyst, the improvement comprising adding to the foam forming mixture a perfluorinated material selected from the group consisting of a perfluorinated hydrocarbon or a mixture of perfluorinated hydrocarbons, the boiling point of the perfluorinated material being less than about 215° C.
Claim 3
Dependent Claim
27 words
The process of claim 1 wherein the polyisocyanate is a member selected from the group consisting of a polymethylene polyphenylisocyanate, an isocyanate group-terminated quasi-prepolymer, and mixtures thereof.
Claim 4
Dependent Claim
31 words
The process of claim 1 wherein the polyol is a member selected from the group consisting of a polyester polyol, a polyether polyol, and mixtures of polyester polyols and polyether polyols.
Claim 5
Dependent Claim
13 words
The process of claim 1 wherein the polyol comprises an aromatic polyester polyol.
Claim 6
Dependent Claim
21 words
The process of claim 1 wherein the perfluorinated material is a liquid whose boiling point is less than about 105° C.
Claim 7
Dependent Claim
26 words
The process of claim 1 wherein the perfluorinated material is from about 0.2 to 15% by weight of the reactive components in the foam forming mixture.
Claim 8
Dependent Claim
51 words
A rigid polyurethane foam comprising the reaction product of an organic polyisocyanate, a polyol, a blowing agent, a catalyst, and a perfluorinated material selected from the group consisting of a perfluorinated hydrocarbon or a mixture of perfluorinated hydrocarbons, the boiling point of the perfluorinated material being less than about 215° C.
Claim 9
Dependent Claim
51 words
A rigid polyurethane foam comprising the reaction product of an organic polyisocyanate, a polyol, a blowing agent, a catalyst, and a perfluorinated material selected from the group consisting of a perfluorinated hydrocarbon or a mixture of perfluorinated hydrocarbons, the boiling point of the perfluorinated material being less than about 215° C.
Claim 10
Dependent Claim
27 words
The foam of claim 7 wherein the polyisocyanate is a member selected from the group consisting of a polymethylene polyphenylisocyanate, an isocyanate group-terminated quasi-prepolymer, and mixtures thereof.
Claim 11
Dependent Claim
31 words
The foam of claim 7 wherein the polyol is a member selected from the group consisting of a polyester polyol, a polyether polyol, and mixtures of polyester polyols and polyether polyols.
Claim 12
Dependent Claim
21 words
The foam of claim 9 wherein the perfluorinated material is a liquid whose boiling point is less than about 105° C.
Claim 13
Dependent Claim
55 words
A rigid polyisocyanurate foam comprising the reaction product of an organic polyisocyanate, a blowing agent, a catalyst, a minor amount of a polyol, and a perfluorinated material selected from the group consisting of a perfluorinated hydrocarbon or a mixture of perfluorinated hydrocarbons, the boiling point of the perfluorinated material being less than about 215° C.
Claim 14
Dependent Claim
55 words
A rigid polyisocyanurate foam comprising the reaction product of an organic polyisocyanate, a blowing agent, a catalyst, a minor amount of a polyol, and a perfluorinated material selected from the group consisting of a perfluorinated hydrocarbon or a mixture of perfluorinated hydrocarbons, the boiling point of the perfluorinated material being less than about 215° C.
Claim 15
Dependent Claim
27 words
The foam of claim 11 wherein the polyisocyanate is a member selected from the group consisting of a polymethylene polyphenylisocyanate, an isocyanate group-terminated quasi-prepolymer, and mixtures thereof.
Claim 16
Dependent Claim
31 words
The foam of claim 12 wherein the polyol is a member selected from the group consisting of a polyester polyol and a mixture of a polyester polyol and a polyether polyol.
Claim 17
Dependent Claim
21 words
The foam of claim 13 wherein the perfluorinated material is a liquid whose boiling point is less than about 105° C.
Claim 18
Dependent Claim
16 words
A laminate comprising at least one facing sheet adhered to the polymer foam of claim 7.
Claim 19
Dependent Claim
53 words
The laminate of claim 15 wherein the polyisocyanate is a member selected from the group consisting of a polymethylene polyphenylisocyanate, an isocyanate group-terminated quasi-prepolymer, and mixtures thereof, and the polyol is a member selected from the group consisting of a polyester polyol and a mixture of a polyester polyol and a polyether polyol.
Claim 20
Dependent Claim
21 words
The laminate of claim 16 wherein the perfluorinated material is a liquid whose boiling point is less than about 105° C.
Claim 21
Dependent Claim
16 words
A laminatc comprising at least one facing sheet adhered to the polymer foam of claim 11.
Claim 22
Dependent Claim
53 words
The laminate of claim 18 wherein the polyisocyanate is a member selected from the group consisting of a polymethylene polyphenylisocyanate, an isocyanate group-terminated quasi-prepolymer, and mixtures thereof, and the polyol is a member selected from the group consisting of a polyester polyol and a mixture of a polyester polyol and a polyether polyol.
Claim 23
Dependent Claim
21 words
The laminate of claim 19 wherein the perfluorinated material is a liquid whose boiling point is less than about 105° C.
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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) | 1993-12-31 | 1994-07-02 | 1995-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-31 | 1998-07-02 | 1999-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-31 | 2002-07-02 | 2003-01-01 | $7700.00 | Window Closed / Lapsed |