US4334033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of polyurethane elastomers
Assignee: BASF SE
•
Filing: 1980-10-06
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Granted: 1982-06-08
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Expires: 2000-10-06
Abstract
Abstract A process for the manufacture of non-cellular and cellular polyurethane elastomers by (a) preparing a hydroxyl group-containing prepolymer by reacting a higher molecular weight polyhydroxyl compound and optionally a chain extender with an organic diisocyanate at a weight ratio of OH groups to NCO groups of 1.2:1 to 2:1, (b) dividing the prepolymer into two components A and B in a weight ratio of about 80:20 to 20:80, (c) reacting component A with 1,5-naphthylene diisocyanate (NDI) in a weight ratio of OH:NCO groups of about 1:2.5 to 1:12 to produce a terminal NCO group-containing NDI-polyurethane adduct, (d) mixing component B with chain extenders and/or cross-linking agents and/or water, and optionally auxiliaries and additives, and (e) reacting the NDI-polyurethane adduct (from step c) with the mixture from step d.
Inventors
- 👤 Lothar Metzinger
- 👤 Otmar Zipp
- 👤 Heinz Bollmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:01
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7657; C08G18/7678; C08G18/08; C08G18/10; C08G18/12; C08G2110/00; C08G2110/0008; C08G2110/0041; C08G2110/0066
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
133 words
A process for the manufacture of polyurethane elastomers comprising the steps of: (a) preparing a hydroxyl group-containing prepolymer by reacting a higher molecular weight polyhydroxyl compound with an organic diisocyanate at a weight ratio of OH groups to NCO groups of about 1.2:1 to 2:1, (b) dividing said prepolymer into two components A and B in a weight ratio of about 80:20 to 20:80, (c) reacting component A with 1,5-naphthylene diisocyanate (NDI) in a weight ratio of OH:NCO groups of about 1:2.5 to 1:12 to produce a terminal NCO group-containing NDI-polyurethane adduct, (d) mixing component B with material selected from the group consisting of chain extenders, crosslinking agents, water and mixtures thereof and optionally auxiliaries and additives, and (e) reacting said NDI polyurethane adduct (from step c) with the mixture from step d.
Claim 2
Dependent Claim
133 words
A process for the manufacture of polyurethane elastomers comprising the steps of: (a) preparing a hydroxyl group-containing prepolymer by reacting a higher molecular weight polyhydroxyl compound with an organic diisocyanate at a weight ratio of OH groups to NCO groups of about 1.2:1 to 2:1, (b) dividing said prepolymer into two components A and B in a weight ratio of about 80:20 to 20:80, (c) reacting component A with 1,5-naphthylene diisocyanate (NDI) in a weight ratio of OH:NCO groups of about 1:2.5 to 1:12 to produce a terminal NCO group-containing NDI-polyurethane adduct, (d) mixing component B with material selected from the group consisting of chain extenders, crosslinking agents, water and mixtures thereof and optionally auxiliaries and additives, and (e) reacting said NDI polyurethane adduct (from step c) with the mixture from step d.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein said polyurethane elastomer is a non-cellular polyurethane elastomer.
Claim 4
Dependent Claim
27 words
The process of claim 2 wherein a chain extender, as well as said higher molecular weight polyhydroxyl compound, is reacted with the organic diisocyanate in step a.
Claim 5
Dependent Claim
38 words
The process of claim 2 wherein said higher molecular weight polyhydroxyl compound of step a has a molecular weight of about 500 to 8000 and the prepolymer prepared therefrom has a molecular weight of about 1100 to 20,000.
Claim 6
Dependent Claim
97 words
The process of claim 4 wherein said higher molecular weight polyhydroxyl compound is reacted with said organic diisocyanate at a temperature of about 60° to 150° C. for a time period of about 0.1 to 24 hours, said prepolymer component A is reacted with NDI at a temperature of about 100° to 150° C. for a period of about 0.25to 3 hours and said NDI polyurethane adduct (from step c) is heated to 90° to 110° C. and the mixture from step d is heated to 50° to 90° C. prior to reacting together in step e.
Claim 7
Dependent Claim
27 words
The process of claim 5 wherein a chain extender, as well as said higher molecular weight polyhydroxyl compound, is reacted with the organic diisocyanate in step a.
Claim 8
Dependent Claim
49 words
The process of claim 5 wherein said higher molecular weight polyhydroxyl compound is selected from the group consisting of polyethylene glycol adipates, polytetrahydrofurans, polycaprolactone diols, and propylene oxide-ethylene oxide glycols, and said isocyanate is selected from the group consisting of hexamethylene diisocyanate, isophorone diisocyanate, toluene diisocyanates, and diphenylmethane diisocyanates.
Claim 9
Dependent Claim
13 words
The process of claim 7 wherein 1,4-butanediol is employed as the chain extender.
Claim 10
Dependent Claim
26 words
The process of claim 8 wherein a chain extender as well as said higher molecular weight polyhydroxyl compound is reacted with said isocyanate in step a.
Claim 11
Dependent Claim
134 words
A process for the manufacture of cellular polyurethane elastomers comprising the steps of (a) preparing a hydroxyl group-containing prepolymer by reacting a higher molecular weight polyhydroxyl compound with an organic diisocyanate at a weight ratio of OH groups to NCO groups of about 1.2:1 to 2:1, (b) dividing said prepolymer into two components A and B in a weight ratio of about 80:20 to 20:80, (c) reacting component A with 1,5-naphthylene diisocyanate (NDI) in a weight ratio of OH:NCO groups of about 1:2.5 to 1:12 to produce a terminal NCO group containing NDI-polyurethane adduct, (d) mixing component B with water, material selected from the group consisting of chain extenders, cross-linking agents and mixtures thereof and optionally auxiliaries and additives, and (e) reacting said NDI-polyurethane adduct (from step c) with the mixture from step d.
Claim 12
Dependent Claim
134 words
A process for the manufacture of cellular polyurethane elastomers comprising the steps of (a) preparing a hydroxyl group-containing prepolymer by reacting a higher molecular weight polyhydroxyl compound with an organic diisocyanate at a weight ratio of OH groups to NCO groups of about 1.2:1 to 2:1, (b) dividing said prepolymer into two components A and B in a weight ratio of about 80:20 to 20:80, (c) reacting component A with 1,5-naphthylene diisocyanate (NDI) in a weight ratio of OH:NCO groups of about 1:2.5 to 1:12 to produce a terminal NCO group containing NDI-polyurethane adduct, (d) mixing component B with water, material selected from the group consisting of chain extenders, cross-linking agents and mixtures thereof and optionally auxiliaries and additives, and (e) reacting said NDI-polyurethane adduct (from step c) with the mixture from step d.
Claim 13
Dependent Claim
27 words
The process of claim 10 wherein a chain extender, as well as a higher molecular weight polyhydroxyl compound, is reacted with the organic diisocyanate in step a.
Claim 14
Dependent Claim
38 words
The process of claim 10 wherein said higher molecular weight polyhydroxyl compound of step a has a molecular weight of about 500 to 8000 and the prepolymer prepared therefrom has a molecular weight of about 1100 to 20,000.
Claim 15
Dependent Claim
101 words
The process of claim 12 wherein said higher molecular weight polyhydroxyl compound is reacted with said organic diisocyanate at a temperature of about 60° to 150° C. for a time period of about 0.1 to 24 hours, said prepolymer component A is reacted with NDI at a temperature of about 100° to 150° C. for a period of about 0.25 to 3 hours, and said NDI polyurethane adduct (from step c) is heated to 90° to 110° C. and said mixture with component B of step d is heated to 50° to 90° C. prior to reacting together in step e.
Claim 16
Dependent Claim
27 words
The process of claim 13 wherein a chain extender, as well as said higher molecular weight polyhydroxyl compound, is reacted with the organic diisocyanate in step a.
Claim 17
Dependent Claim
49 words
The process of claim 13 wherein said higher molecular weight polyhydroxyl compound is selected from the group consisting of polyethylene glycol adipates, polytetrahydrofurans, polycaprolactone diols, and propylene oxide-ethylene oxide glycols, and said isocyanate is selected from the group consisting of hexamethylene diisocyanate, isophorone diisocyanate, toluene diisocyanates, and diphenylmethane diisocyanates.
Claim 18
Dependent Claim
13 words
The process of claim 15 wherein 1,4-butanediol is employed as the chain extender.
Claim 19
Dependent Claim
26 words
The process of claim 16 wherein a chain extender as well as said higher molecular weight polyhydroxyl compound is reacted with said isocyanate in step a.
References Cited (Backward Citations)
US3905925A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-07 | 1985-12-07 | 1986-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-07 | 1989-12-07 | 1990-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-07 | 1993-12-07 | 1994-06-08 | $7700.00 | Window Closed / Lapsed |