US4344855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of polyisocyanates which contain carbodiimide groups and which are stable in storage
Assignee: Bayer AG
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Filing: 1976-11-12
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Granted: 1982-08-17
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Expires: 1996-11-12
Abstract
Abstract The instant invention relates to a process for producing stable equilibrium mixtures of carbodiimides, uretone imines and organic isocyanates and storage-stable solutions of carbodiimides and uretone imines in polyisocyanates which are free from carbodiimide groups. Either the carbodiimide, or the uretone imine, or both, may contain isocyanate groups. The invention relates to the process for the preparation of these products by so-called heterogeneous catalysis and the use of these products for the production of polyurethane resins.
Inventors
- 👤 Walter Schafer
- 👤 Kuno Wagner
- 👤 Hans-Dieter Block
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:51
CPC Classifications
C; C07; C07C; C07C263/00; C07C263/18; C07C267/00; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6568; C07F9/65685; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/32; C08G18/3271; C08G18/40; C08G18/48; C08G18/4829; C08G18/4833; C08G18/4837; C08G18/485; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6681; C08G18/6688; C08G18/70; C08G18/72; C08G18/721; C08G18/725; C08G18/73; C08G18/74; C08G18/75; C08G18/751; C08G18/752; C08G18/753; C08G18/755; C08G18/76; C08G18/7614; C08G18/7621; C08G18/77; C08G18/78; C08G18/79; C08G18/797; C08G2101/00; Y; Y10; Y10S; Y10S521/00; Y10S521/901
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
85 words
A process for preparing a storage stable, catalyst-free, equilibrium mixture of an organic carbodiimide, an organic uretoneimine and an organic isocyanate comprising the steps: (a) contacting an organic mono- and/or polyisocyanate with a high molecular weight carbodiimidization catalyst which is insoluble in organic isocyanate and which comprises a high molecular weight, insoluble organic matrix and a low molecular weight carbodiimidization catalyst bound to the matrix via covalent bonds, and (b) removing said high molecular weight catalyst when the desired degree of carbodiimidization has been reached.
Claim 2
Dependent Claim
85 words
A process for preparing a storage stable, catalyst-free, equilibrium mixture of an organic carbodiimide, an organic uretoneimine and an organic isocyanate comprising the steps: (a) contacting an organic mono- and/or polyisocyanate with a high molecular weight carbodiimidization catalyst which is insoluble in organic isocyanate and which comprises a high molecular weight, insoluble organic matrix and a low molecular weight carbodiimidization catalyst bound to the matrix via covalent bonds, and (b) removing said high molecular weight catalyst when the desired degree of carbodiimidization has been reached.
Claim 3
Dependent Claim
17 words
The process of claim 1, wherein said organic mono- and/or polyisocyanate is dissolved in an inert solvent.
Claim 4
Dependent Claim
28 words
The process of claim 1, further comprising the step of: (c) adding a mono- and/or polyisocyanate which is free of carbodiimide and uretoneimine groups to the equilibrium mixture.
Claim 5
Dependent Claim
85 words
The process of claim 1, wherein said matrix is bound to a catalytically active group selected from the group consisting of: ##STR13## in which R 1 represents the organic matrix or an alkyl, aryl or aralkyl group with 1 to 14 carbon atoms and R 2 , R 3 , R 4 and R 5 represent hydrogen, halogen, C 1 -C 14 -alkyl, aryl, or aralkyl groups, alkoxy-carbonyl, or phosphonic acid ester groups or C 1 -C 4 -hydroxyalkyl groups or mercaptoalkyl groups or HO.
Claim 6
Dependent Claim
65 words
The process of claim 4, wherein said matrix is a polyester resin and wherein said catalytically active groups are bound to the matrix through an ester group, ether group or carbon to carbon bond by way of at least one of the groups R 1 to R 5 or the phospholane ring is bound directly to the matrix by way of carbon to carbon bonds.
Claim 7
Dependent Claim
62 words
The process of claim 4, wherein said matrix is a polystyrene resin and wherein said catalytically active groups are bound to the matrix by way of a least one of the groups R 1 to R 5 through an ether group or carbon-to-carbon bond or the phospholane ring is bound to the matrix directly by way of a carbon to carbon bond.
Claim 8
Dependent Claim
14 words
The process of claim 6, wherein said polystyrene resin is crosslinked with divinyl benzene.
Claim 9
Dependent Claim
20 words
The process of claim 4, wherein said matrix is polyvinyl alcohol and wherein R 1 represents the polyvinyl alcohol matrix.
Claim 10
Dependent Claim
35 words
The process of claim 4, wherein said organic matrix has a molecular weight of at least 2000 and the high molecular weight catalyst has a phosphorous content of from 0.05 to 23 percent by weight.
Claim 11
Dependent Claim
27 words
The process of claim 9, wherein from 0.2 to 10 percent by weight of high molecular weight catalyst is used based on the weight of the isocyanate.
References Cited (Backward Citations)
GB918454A
Cited
US3676402A
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US3953406A
Cited
US3887476A
Cited
US3952084A
Cited
US4046744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-16 | 1986-02-15 | 1986-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-16 | 1990-02-15 | 1990-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-16 | 1994-02-15 | 1994-08-17 | $7700.00 | Window Closed / Lapsed |