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US4914150A
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Process for preparing anti-static polyisocyanate-based polymers via incorporating a polyalkylene carbonate-salt mixture
Assignee: Dow Chemical Co
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Filing: 1988-12-02
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Granted: 1990-04-03
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Expires: 2008-12-02
Abstract
Abstract This invention relates to a process for preparing polyisocyanate-based polymers which have the ability to dissipate static electrical charge. The polymers are rendered semi-conductive by having incorporated into them an anti-static additive which comprises an ionizable metal salt dispersed in a polyalkylene carbonate polyol.
Inventors
- 👤 Donald G. Prier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:02
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/44; C08K; C08K3/00; C08K3/01; C08K3/017; C08K3/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
64 words
A process for preparing a polyisocyanate-based polymer by the reaction of a polyisocyanate with an active hydrogen-containing composition characterized in that the said composition comprises a polyalkylene carbonate polyol having dispersed therein a non-volatile ionizable salt, and said reaction being conducted in the substantial absence of a carboxylic acid ester of C 6-30 carbon atoms, a fatty acid salt and a phosphate ester compound.
Claim 2
Dependent Claim
64 words
A process for preparing a polyisocyanate-based polymer by the reaction of a polyisocyanate with an active hydrogen-containing composition characterized in that the said composition comprises a polyalkylene carbonate polyol having dispersed therein a non-volatile ionizable salt, and said reaction being conducted in the substantial absence of a carboxylic acid ester of C 6-30 carbon atoms, a fatty acid salt and a phosphate ester compound.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein the non-volatile ionizable salt comprises an alkali metal.
Claim 4
Dependent Claim
34 words
The process of claim 2 wherein the non-volatile ionizable salt contains one or more anions selected from the group consisting of fluoride, chloride, bromide, iodide, sulfate, nitrate, chlorate, acetate, thiocyanate, tetraalkylboride, tetraphenylboride and perfluoroalkylsulfonate.
Claim 5
Dependent Claim
15 words
The process of claim 3 wherein the non-volatile ionizable salt is an alkali metal tetraphenylboride.
Claim 6
Dependent Claim
15 words
The process of claim 3 wherein the non-volatile ionizable salt is an alkali metal thiocyanate.
Claim 7
Dependent Claim
25 words
The process of claim 1 wherein the polyalkylene carbonate contains from about 0.01 to about 60 weight percent of the non-volatile ionizable salt dispersed therein.
Claim 8
Dependent Claim
30 words
The process of claim 6 wherein the polyalkylene carbonate and non-volatile ionizable salt are mixed together optionally in the presence of a low boiling liquid which can subsequently be removed.
Claim 9
Dependent Claim
16 words
The process of claim 7 wherein the low boiling liquid is an alcohol, ketone or halocarbon.
Claim 10
Dependent Claim
24 words
The process of claim 1 wherein the active hydrogen-containing composition contains from about 0.01 to about 25.0 weight percent of the polyalkylene carbonate-salt mixture.
Claim 11
Dependent Claim
30 words
The process of claim 1 wherein the polyisocyanate is used in such a quantity so as to provide from 0.9 to 1.3 isocyanate groups per active hydrogen of the composition.
Claim 12
Dependent Claim
12 words
The process of claim 10 wherein the polyisocyanate essentially is toluene diisocyanate.
Claim 13
Dependent Claim
12 words
The process of claim 10 wherein the polyisocyanate essentially is methane diphenylisocyanate.
Claim 14
Dependent Claim
12 words
The process of claim 10 wherein the polyisocyanate essentially is polymethylene polyphenylisocyanate.
Claim 15
Dependent Claim
14 words
The process of claim 10 wherein the polyisocyanate essentially is an isocyanate terminated prepolymer.
Claim 16
Dependent Claim
61 words
A polyisocyanate-based polymer prepared by the reaction of a polyisocyanate with an active hydrogen-containing composition characterized in that the said composition comprises a polyalkylene carbonate polyol having dispersed therein a non-volatile ionizable salt, and said reaction being conducted in the substantial absence of a carboxylic acid ester of C 6-30 carbon atoms, a fatty acid salt and a phosphate ester compound.
Claim 17
Dependent Claim
61 words
A polyisocyanate-based polymer prepared by the reaction of a polyisocyanate with an active hydrogen-containing composition characterized in that the said composition comprises a polyalkylene carbonate polyol having dispersed therein a non-volatile ionizable salt, and said reaction being conducted in the substantial absence of a carboxylic acid ester of C 6-30 carbon atoms, a fatty acid salt and a phosphate ester compound.
Claim 18
Dependent Claim
22 words
The polymer of claim 15 wherein the non-volatile ionizable salt is present in about 0.001 to 10 weight percent of the polymer.
Claim 19
Dependent Claim
32 words
A polyalkylene carbonate polyol having dispersed therein a non-volatile ionizable salt characterized in that the salt is present in from about 0.01 to 60 percent of total weight of polyol plus salt.
Claim 20
Dependent Claim
32 words
A polyalkylene carbonate polyol having dispersed therein a non-volatile ionizable salt characterized in that the salt is present in from about 0.01 to 60 percent of total weight of polyol plus salt.
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) | 1993-04-02 | 1993-10-02 | 1994-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-02 | 1997-10-02 | 1998-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-02 | 2001-10-02 | 2002-04-03 | $7700.00 | Window Closed / Lapsed |