US4331778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of polyurethane plastics
Assignee: Bayer AG
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Filing: 1979-12-10
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Granted: 1982-05-25
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Expires: 1999-12-10
Abstract
Abstract The present invention relates to a process for the production of polyurethane plastics by reacting compounds containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight in the range of from 400 to 10,000, polyisocyanates and, optionally, chain extenders having a molecular weight of from 32 to 400, foam stabilizers, water and/or organic blowing agents in the presence of catalysts containing tertiary nitrogen. These catalysts are characterized in that mixtures of (a) one or more cross-linking catalysts corresponding to the following general formula: ##STR1## wherein R 1 , R 2 , R 3 and R 4 which may be the same or different, represent C 1 -C 5 -alkyl radicals, preferably CH 3 -- or C 2 H 5 radicals, R' and R" represent hydrogen or the same or different C 1 -C 3 -alkyl radicals, preferably CH 3 -- or C 2 H 5 -- radicals, and n represents an integer of from 1 to 10, preferably from 4 to 8, (b) blowing catalysts corresponding to the following general formula: ##STR2## wherein R 1 , R 2 , R 3 and R 4 , are as defined above and X represents oxygen or ##STR3## where R'" represents a C 1 -C 5 alkyl radical, preferably a CH 3 -- or C 2 H 5 -- radical, p represents an integer of from 2 to 4 and r represents an integer of from 1 to 3, and m and o which may be the same or different, represent numbers ranging from 1 to 10, preferably from 1 to 3 in value.
Inventors
- 👤 Claus-Dieter Sommerfeld
- 👤 Peter Haas
- 👤 Kuno Wagner
- 👤 Manfred Kapps
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:55
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/1833; C08G18/1808
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
223 words
A process for the production of polyurethane plastics by reacting: (a) compounds containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight of from 400 to 10,000, (b) polyisocyanates and, optionally, (c) chain extenders having a molecular weight in the range of from 32 to 400, foam stabilizers, water and/or organic blowing agents, wherein the improvement is in using a catalytic amount of combination catalysts containing tertiary nitrogen, said combinations comprising, (1) cross-linking catalysts corresponding to the following general formula: ##STR20## wherein R 1 , R 2 , R 3 and R 4 , which may be the same or different, represent C 1 -C 5 -alkyl radicals, R' and R" represent hydrogen or the same or different C 1 -C 3 -alkyl radicals, and n represents an integer of from 1 to 10, preferably from 4 to 8, and (2) blowing catalysts corresponding to the following general formula: ##STR21## wherein R 1 , R 2 , R 3 and R 4 , are as defined above and X represents oxygen or ##STR22## where R'" represents a C 1 -C 5 -alkyl radical, p represents an integer of from 2 to 4, r represents an integer of from 1 to 3, and m and o, which may be the same or different, represent integers ranging from 1 to 10 in value.
Claim 2
Dependent Claim
223 words
A process for the production of polyurethane plastics by reacting: (a) compounds containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight of from 400 to 10,000, (b) polyisocyanates and, optionally, (c) chain extenders having a molecular weight in the range of from 32 to 400, foam stabilizers, water and/or organic blowing agents, wherein the improvement is in using a catalytic amount of combination catalysts containing tertiary nitrogen, said combinations comprising, (1) cross-linking catalysts corresponding to the following general formula: ##STR20## wherein R 1 , R 2 , R 3 and R 4 , which may be the same or different, represent C 1 -C 5 -alkyl radicals, R' and R" represent hydrogen or the same or different C 1 -C 3 -alkyl radicals, and n represents an integer of from 1 to 10, preferably from 4 to 8, and (2) blowing catalysts corresponding to the following general formula: ##STR21## wherein R 1 , R 2 , R 3 and R 4 , are as defined above and X represents oxygen or ##STR22## where R'" represents a C 1 -C 5 -alkyl radical, p represents an integer of from 2 to 4, r represents an integer of from 1 to 3, and m and o, which may be the same or different, represent integers ranging from 1 to 10 in value.
Claim 3
Dependent Claim
43 words
A process as claimed in claim 1, wherein R 1 , R 2 , R 3 , R 4 , R', and R" and R'", which may be the same or different represent CH 3 -- or C 2 H 5 -- radicals.
Claim 4
Dependent Claim
17 words
A process as claimed in claim 1, wherein n represents an integer of from 4 to 8.
Claim 5
Dependent Claim
18 words
A process as claimed in claim 1, wherein m and o represent integers of from 1 to 3.
Claim 6
Dependent Claim
45 words
A process as claimed in claim 1, wherein catalyst combinations of from 0.1 to 3.0 parts by weight of the blowing catalysts with from 0.3 to 5.0 parts by weight of the cross-linking catalysts are used per 100 parts by weight of said component (a).
Claim 7
Dependent Claim
45 words
A process as claimed in claim 1, wherein catalyst combinations of from 0.3 to 1.0 parts by weight of the blowing catalysts with from 1.0 to 3.0 parts by weight of the cross-linking catalysts are used per 100 parts by weight of said component (a).
Claim 8
Dependent Claim
29 words
A process as claimed in claims 1 or 6, wherein a compound corresponding to ##STR23## in said cross-linking catalyst, and a compound corresponding to ##STR24## in said blowing catalyst.
Claim 9
Dependent Claim
21 words
A process as claimed in claims 1 or 6, wherein a compound corresponding to ##STR25## is used as said blowing catalyst.
Claim 10
Dependent Claim
21 words
A process as claimed in claims 1 or 6, wherein a compound corresponding to ##STR26## is used as said blowing catalyst.
Claim 11
Dependent Claim
15 words
A process as claimed in claim 1, wherein polyurethane plastics foamed within molds are produced.
Claim 12
Dependent Claim
33 words
A process as claimed in claim 1 or 6 wherein a compound corresponding to ##STR27## is used as said blowing catalyst; and a compound corresponding to ##STR28## is used as said cross-linking catalyst.
Claim 13
Dependent Claim
33 words
A process as claimed in claim 1 or 6, wherein a compound corresponding to ##STR29## is used as said blowing catalyst and a compound corresponding to ##STR30## is used as said cross-linking catalyst.
Claim 14
Dependent Claim
34 words
A process as claimed in claim 1 or 6, wherein a compound corresponding to ##STR31## is used as said blowing catalyst; and wherein a compound corresponding to ##STR32## is used as said cross-linking catalyst.
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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) | 1985-05-24 | 1985-11-23 | 1986-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-24 | 1989-11-23 | 1990-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-24 | 1993-11-23 | 1994-05-25 | $7700.00 | Window Closed / Lapsed |