US4096101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of chemically after-cross-linked polyurethane resins
Assignee: Bayer AG
•
Filing: 1977-07-12
•
Granted: 1978-06-20
•
Expires: 1997-07-12
Abstract
Abstract This invention relates to a process for making optionally cellular cross-linked elastomeric polyurethane resins from (a) polyisocyanates, (b) higher molecular weight polyhydroxyl and/or polyamino compounds containing filler particles, (c) chain lengthening agents and, optionally, (d) blowing agents, catalysts and other additives known per se, Wherein filler particles capable of being cross-linked with the formaldehyde are used and wherein the elastomeric polyurethanes which contain fillers are cross-linked with formaldehyde or formaldehyde releasing compounds, after the chain lengthening reaction has been substantially completed.
Inventors
- 👤 Johannes Blahak
- 👤 Kuno Wagner
- 👤 Jan Mazanek
- 👤 Hanns Peter Muller
- 👤 Artur Reischl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:52
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/04; C08G; C08G18/00; C08G18/06; C08G18/83; C08G18/84
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
66 words
A process for the production of cross-linked elastomeric, optionally cellular polyurethane resins comprising reacting: (a) polyisocyanates, (b) higher molecular weight polyhydroxyl and/or polyamino compounds containing filler particles. (c) chain lengthening agents wherein said filler particles are capable of being cross-linked with formaldehyde and wherein the elastomeric polyurethanes containing fillers are cross-linked with formaldehyde or formaldehyde releasing compounds after the chain lengthening reaction has been essentially completed.
Claim 2
Dependent Claim
66 words
A process for the production of cross-linked elastomeric, optionally cellular polyurethane resins comprising reacting: (a) polyisocyanates, (b) higher molecular weight polyhydroxyl and/or polyamino compounds containing filler particles. (c) chain lengthening agents wherein said filler particles are capable of being cross-linked with formaldehyde and wherein the elastomeric polyurethanes containing fillers are cross-linked with formaldehyde or formaldehyde releasing compounds after the chain lengthening reaction has been essentially completed.
Claim 3
Dependent Claim
29 words
The process of claim 1 wherein the filler is selected from the group consisting of (a) aminoplasts and/or phenoplasts which may contain ionic groups, (b) polyureas and (c) polyhydrazodicarbonamides.
Claim 4
Dependent Claim
101 words
The process of claim 1 wherein said formaldehyde releasing cross-linking compounds are of the general formula: ##STR9## in which R represents hydrogen or methyl, R 1 represents hydrogen, methyl or the group ##STR10## R 2 represents hydrogen, methyl, phenyl or haloalkyl R 3 represents hydrogen; or a straight or branched chain C 1-6 -alkyl group, a cycloalkyl group, or a phenyl group which may be substituted; and R 4 represents hydrogen; a straight or branched chain C 1-6 -alkyl group, or a group of the formula ##STR11## in which R 5 represents a straight or branched chain C 1-6 alkyl group.
Claim 5
Dependent Claim
116 words
The process of claim 1 wherein said formaldehyde cross-linking agent is of the general formula: ##STR12## in which R 6 represents hydrogen or methyl; R 7 represents hydrogen, methyl or the group ##STR13## R 8 represents hydrogen or methyl, R 9 and R 10 , which may be the same or different, represent hydrogen or C 1 -C 4 -alkyl; R 11 represents a straight or branched chain C 1 -C 18 -alkyl group, R 12 represents hydrogen or a straight or branched chain C 1 -C 6 alkyl group or a group of the formula ##STR14## in which R 13 represents a C 1 -C 6 alkyl group, and n represents 0, 1 or 2.
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) | 1981-06-19 | 1981-12-19 | 1982-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-19 | 1985-12-19 | 1986-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-19 | 1989-12-19 | 1990-06-20 | $7700.00 | Window Closed / Lapsed |