Patent US4359550A successfully refreshed from Google Patents.
US4359550A
Expired / Lapsed
US
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Polyisocyanurate polymers, dispersions, and cellular and non-cellular polyurethane products prepared therefrom
Assignee: BASF Corp
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Filing: 1981-01-19
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Granted: 1982-11-16
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Expires: 2001-01-19
Abstract
Abstract Polyisocyanurate polymers are prepared by the polymerization of organic polyisocyanates in organic solvents employing trimerization catalysts. After deactivation of the catalysts and removal of the solvents, these polymers may be dispersed in polyols which are employed for the preparation of cellular and non-cellular polyurethane products displaying improved load bearing properties.
Inventors
- 👤 Thirumurti Narayan
- 👤 Gerhard G. Ramlow
- 👤 Peter T. Kan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:18
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08G; C08G18/00; C08G18/02; C08G18/022; C08G18/06; C08G18/28; C08G18/40; C08G18/409; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/79; C08G18/791; C08L; C08L75/00; C08L75/04; C08J2375/00; C08J2375/04; C08J2479/00; Y; Y10; Y10S; Y10S521/00; Y10S521/902
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
51 words
A process for preparing a polyisocyanurate polymer dispersion by (a) polymerizing a solution of an organic polyisocyanate in an organic solvent in the presence of an effective amount of a trimerization catalyst, (b) deactivating said catalyst, (c) isolating said polymer from said solvent, and (d) dispersing said polymer in a polyol.
Claim 2
Dependent Claim
51 words
A process for preparing a polyisocyanurate polymer dispersion by (a) polymerizing a solution of an organic polyisocyanate in an organic solvent in the presence of an effective amount of a trimerization catalyst, (b) deactivating said catalyst, (c) isolating said polymer from said solvent, and (d) dispersing said polymer in a polyol.
Claim 3
Dependent Claim
20 words
The dispersion of claim 1 wherein said polymer is isolated by the addition of a non-solvent and precipitated from solution.
Claim 4
Dependent Claim
37 words
The dispersion of claim 1 wherein said organic polyisocyanate is selected from the group consisting of 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, crude toluene diisocyanate, 2,4'-diphenylmethane diisocyanate, 4,4'-diphenylmethane diisocyanate, hydrogenated diphenylamine diisocyanate and polymethylene polyphenylene polyisocyanate and mixtures thereof.
Claim 5
Dependent Claim
32 words
The dispersion of claim 1 wherein the organic solvent is selected from the group consisting of toluene, ethyl acetate, cyclohexane, tetrahydrofuran, carbon tetrachloride, tetramethylenesulfone, N-methylpyrrolidone, dimethylformamide, dimethyl acetamide, dimethyl sulfoxide, and acetone.
Claim 6
Dependent Claim
22 words
The dispersion of claim 1 wherein the free isocyanate content after polymerization is less than 24.2 percent based on the polymer weight.
Claim 7
Dependent Claim
23 words
The dispersion of claim 1 wherein the free isocyanate content after polymerization is from 1 to 16 percent based on the polymer weight.
Claim 8
Dependent Claim
35 words
In a polyurethane foam prepared by the reaction of a polyol, an organic polyisocyanate, catalyst, blowing agents and optionally other additives, the improvement comprising employing as the polyol component the polymer dispersion of claim 1.
Claim 9
Dependent Claim
35 words
In a polyurethane foam prepared by the reaction of a polyol, an organic polyisocyanate, catalyst, blowing agents and optionally other additives, the improvement comprising employing as the polyol component the polymer dispersion of claim 2.
Claim 10
Dependent Claim
35 words
In a polyurethane foam prepared by the reaction of a polyol, an organic polyisocyanate, catalyst, blowing agents and optionally other additives, the improvement comprising employing as the polyol component the polymer dispersion of claim 3.
Claim 11
Dependent Claim
35 words
In a polyurethane foam prepared by the reaction of a polyol, an organic polyisocyanate, catalyst, blowing agents and optionally other additives, the improvement comprising employing as the polyol component the polymer dispersion of claim 4.
Claim 12
Dependent Claim
35 words
In a polyurethane foam prepared by the reaction of a polyol, an organic polyisocyanate, catalyst, blowing agents and optionally other additives, the improvement comprising employing as the polyol component the polymer dispersion of claim 5.
Claim 13
Dependent Claim
35 words
In a polyurethane foam prepared by the reaction of a polyol, an organic polyisocyanate, catalyst, blowing agents and optionally other additives, the improvement comprising employing as the polyol component the polymer dispersion of claim 6.
Claim 14
Dependent Claim
34 words
In a non-cellular polyurethane product prepared by the reaction of a polyol, an organic polyisocyanate, catalyst, and optionally other additives, the improvement comprising employing as the polyol component the polymer dispersion of claim 1.
Claim 15
Dependent Claim
34 words
In a non-cellular polyurethane product prepared by the reaction of a polyol, an organic polyisocyanate, catalyst, and optionally other additives, the improvement comprising employing as the polyol component the polymer dispersion of claim 2.
Claim 16
Dependent Claim
34 words
In a non-cellular polyurethane product prepared by the reaction of a polyol, an organic polyisocyanate, catalyst, and optionally other additives, the improvement comprising employing as the polyol component the polymer dispersion of claim 3.
Claim 17
Dependent Claim
34 words
In a non-cellular polyurethane product prepared by the reaction of a polyol, an organic polyisocyanate, catalyst, and optionally other additives, the improvement comprising employing as the polyol component the polymer dispersion of claim 4.
Claim 18
Dependent Claim
34 words
In a non-cellular polyurethane product prepared by the reaction of a polyol, an organic polyisocyanate, catalyst, and optionally other additives, the improvement comprising employing as the polyol component the polymer dispersion of claim 5.
Claim 19
Dependent Claim
34 words
In a non-cellular polyurethane product prepared by the reaction of a polyol, an organic polyisocyanate, catalyst, and optionally other additives, the improvement comprising employing as the polyol component the polymer dispersion of claim 6.
References Cited (Backward Citations)
US3367934A
Cited
US3280066A
Cited
US3278492A
Cited
US3381008A
Cited
US3759916A
Cited
US4089835A
Cited
US4092275A
Cited
US4093569A
Cited
US4184990A
Cited
US4115373A
Cited
US4255569A
Cited
US4251401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-15 | 1986-05-17 | 1986-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-15 | 1990-05-17 | 1990-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-15 | 1994-05-17 | 1994-11-16 | $7700.00 | Window Closed / Lapsed |