US4282329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized filler suspensions in polyols
Assignee: Bayer AG
•
Filing: 1980-07-21
•
Granted: 1981-08-04
•
Expires: 2000-07-21
Abstract
Abstract The instant invention is directed to a process for the production of non-disintegrating suspensions of inorganic fillers in polyhydroxyl compounds of the type used for the production of polyurethanes, comprising reacting a suspension of an inorganic filler in a polyhydroxyl compound with from 0.1 to 2%, by weight, of a polyisocyanate, based on the weight of the suspension, at a temperature of from 30° to 200° C. The invention is also directed to the use of the suspension as the polyol component in the production of cellular polyurethane plastics.
Inventors
- 👤 Wulf von Bonin
- 👤 Peter Vehlewald
- 👤 Hans-Walter Illger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:07
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0066; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08K; C08K3/00; C08K3/01; C08K3/013; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
99 words
In a process for the production of cellular polyurethane plastics comprising: (A) polyisocyanates with (B) polyhydroxyl compounds containing inorganic fillers and having a molecular weight of from 500 to 10,000 and, optionally, (C) other isocyanate-reactive compounds, optionally in the presence of (D) catalyts, blowing agents and other additives known per se, the improvement wherein component (B) is a stabilized suspension obtained by reacting a suspension of an inorganic filler in a polyhydroxyl compound with from 0.1 to 2%, by weight, of a polyisocyanate, based on the weight of the suspension, at a temperature of from 30° to 200° C.
Claim 2
Dependent Claim
99 words
In a process for the production of cellular polyurethane plastics comprising: (A) polyisocyanates with (B) polyhydroxyl compounds containing inorganic fillers and having a molecular weight of from 500 to 10,000 and, optionally, (C) other isocyanate-reactive compounds, optionally in the presence of (D) catalyts, blowing agents and other additives known per se, the improvement wherein component (B) is a stabilized suspension obtained by reacting a suspension of an inorganic filler in a polyhydroxyl compound with from 0.1 to 2%, by weight, of a polyisocyanate, based on the weight of the suspension, at a temperature of from 30° to 200° C.
Claim 3
Dependent Claim
31 words
The process of claim 1, wherein said suspension comprises 5 to 75%, by weight, of an inorganic filler in a polyhydroxy polyether having a molecular weight of from 500 to 10,000.
Claim 4
Dependent Claim
15 words
The process of claim 1, wherein the reaction temperature is from 100° to 150° C.
Claim 5
Dependent Claim
10 words
The process of claim 2, wherein said polyisocyanate is diisocyanate.
Claim 6
Dependent Claim
39 words
The process of claim 1, wherein said suspension contains 20 to 50%, by weight, of chalk powder having a particle size of less than 10 μm in a polyhydroxy polyether having a molecular weight of from 1,000 to 7,000.
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) | 1984-08-03 | 1985-02-02 | 1985-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-03 | 1989-02-02 | 1989-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-03 | 1993-02-02 | 1993-08-04 | $7700.00 | Window Closed / Lapsed |