US4009130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of isocyanurate foams using alkali metal tertiaryamino dithiocarbamate salt catalysts
Assignee: Texaco Development Corp
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Filing: 1975-06-11
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Granted: 1977-02-22
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Expires: 1995-06-11
Abstract
Abstract New catalysts for isocyanurate foams comprising alkali metal tertiaryamino dithiocarbamate salts. The novel foams are obtained by the polymerization of an excess of aromatic polyisocyanate, and a polyether or polyester polyol in the presence of a blowing agent and said alkali metal tertiaryamino dithiocarbamate salt useful as an isocyanurate group formation catalyst. The novel foams are useful in preparing rigid, flexible, semi-rigid or semi-flexible materials such as panels or slabs or sprayed foam surfaces.
Inventors
- 👤 Robert L. Zimmerman
- 👤 Thomas H. Austin
- 👤 Heinz Schulze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:43
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/225; C08G18/18; C08G18/20; C08G18/2009; C08G18/2027; C08G2115/00; C08G2115/02; Y; Y10; Y10S; Y10S521/00; Y10S521/902; Y10S521/906
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
66 words
In a process for preparing a cellular polymer containing recurring isocyanurate and urethane linkages which polymer comprises the reaction product obtained by bringing together in the presence of a blowing agent a polyether or polyester polyol, an aromatic polyisocyanate, and an isocyanurate group formation catalyst; the improvement which comprises utilizing as said isocyanurate catalyst in at least a catalytic amount an alkali metal tertiaryamino dithiocarbamate salt.
Claim 2
Dependent Claim
66 words
In a process for preparing a cellular polymer containing recurring isocyanurate and urethane linkages which polymer comprises the reaction product obtained by bringing together in the presence of a blowing agent a polyether or polyester polyol, an aromatic polyisocyanate, and an isocyanurate group formation catalyst; the improvement which comprises utilizing as said isocyanurate catalyst in at least a catalytic amount an alkali metal tertiaryamino dithiocarbamate salt.
Claim 3
Dependent Claim
98 words
In a process for preparing a cellular polymer containing recurring isocyanurate and urethane linkages which polymer comprises the reaction product obtained by bringing together in the presence of a blowing agent a polyether or polyester polyol, an aromatic polyisocyanate, and an isocyanurate group formation catalyst; the improvement which comprises utilizing as said isocyanurate catalyst in at least a catalytic amount a compound selected from the group consisting of ##STR4## where R is a lower alkyl radical, R 1 is a lower alkylene radical, R 2 is hydrogen or a lower cyanoalkyl radical, and A represents an alkali metal.
Claim 4
Dependent Claim
98 words
In a process for preparing a cellular polymer containing recurring isocyanurate and urethane linkages which polymer comprises the reaction product obtained by bringing together in the presence of a blowing agent a polyether or polyester polyol, an aromatic polyisocyanate, and an isocyanurate group formation catalyst; the improvement which comprises utilizing as said isocyanurate catalyst in at least a catalytic amount a compound selected from the group consisting of ##STR4## where R is a lower alkyl radical, R 1 is a lower alkylene radical, R 2 is hydrogen or a lower cyanoalkyl radical, and A represents an alkali metal.
Claim 5
Dependent Claim
13 words
The process of claim 2 wherein said polyisocyanate is a methylene-bridged polyphenyl polyisocyanate.
Claim 6
Dependent Claim
11 words
The process of claim 2 wherein said isocyanurate catalyst is ##STR5##
Claim 7
Dependent Claim
11 words
The process of claim 2 wherein said isocyanurate catalyst is ##STR6##
Claim 8
Dependent Claim
11 words
The process of claim 2 wherein said isocyanurate catalyst is ##STR7##
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) | 1980-02-22 | 1980-08-23 | 1981-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-22 | 1984-08-23 | 1985-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-22 | 1988-08-23 | 1989-02-22 | $7700.00 | Window Closed / Lapsed |