US4581418A
Expired / Lapsed
US
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Process for preparing copolymer polyols
Assignee: Dow Chemical Co
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Filing: 1984-08-23
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Granted: 1986-04-08
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Expires: 2004-08-23
Abstract
Abstract Copolymer polyols are prepared by polymerizing ethylenically unsaturated monomer in a polyahl mixture in the presence of a triiodomethyl compound. The use of the triiodomethyl compound provides a lower viscosity, more stable copolymer polyahl.
Inventors
- 👤 John F. Serratelli
- 👤 Michael A. Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:22
CPC Classifications
C; C08; C08F; C08F299/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
49 words
In a process for preparing a polymer polyol comprising polymerizing an ethylenically unsaturated monomer or mixture thereof in a polyahl or polyahl mixture whereby a dispersion of polymer particles is prepared in a continuous polyahl phase, the improvement comprising conducting said polymerization in the presence of a triiodomethyl compound.
Claim 2
Dependent Claim
49 words
In a process for preparing a polymer polyol comprising polymerizing an ethylenically unsaturated monomer or mixture thereof in a polyahl or polyahl mixture whereby a dispersion of polymer particles is prepared in a continuous polyahl phase, the improvement comprising conducting said polymerization in the presence of a triiodomethyl compound.
Claim 3
Dependent Claim
28 words
The improved process of claim 1 wherein the triiodomethyl compound is represented by the structure: RCI.sub.3 wherein R is hydrogen, halogen including iodine, lower alkyl, benzyl or phenyl.
Claim 4
Dependent Claim
16 words
The improved process of claim 2 wherein the triiodomethyl compound is iodoform, 1,1,1-triiodoethane or carbon tetraiodide.
Claim 5
Dependent Claim
33 words
The improved process of claim 1 where the triiodomethyl compound is employed in an amount from about 0.1 to about 2 percent by weight of the ethylenically unsaturated monomer or mixture of monomer.
Claim 6
Dependent Claim
17 words
The improved process of claim 1 wherein the polyahl or polyahl mixture contains purposefully introduced ethylenic unsaturation.
Claim 7
Dependent Claim
50 words
The improved process of claim 5 wherein the polyahl or polyahl mixture comprises the reaction product of a polyahl and a difunctional compound having an additional polymerizable ethylenically unsaturated group and another functional group which reacts with a polyahl to form a bond between the difunctional compound and the polyahl.
Claim 8
Dependent Claim
16 words
The improved process of claim 6 wherein the difunctional compound is an ethylenically unsaturated carboxylic acid.
Claim 9
Dependent Claim
15 words
The improved process of claim 6 wherein the difunctional compound is an ethylenically unsaturated isocyanate.
Claim 10
Dependent Claim
18 words
The improved process of claim 8 wherein the difunctional compound is an isocyanatoalkylester of acrylic or methacrylic acid.
Claim 11
Dependent Claim
15 words
The improved process of claim 1 wherein said monomer comprises styrene, acrylonitrile, or mixtures thereof.
Claim 12
Dependent Claim
11 words
A polymer polyahl prepared according to the process of claim 2.
Claim 13
Dependent Claim
11 words
A polymer polyahl prepared according to the process of claim 3.
Claim 14
Dependent Claim
11 words
A polymer polyahl prepared according to the process of claim 6.
Claim 15
Dependent Claim
11 words
A polymer polyahl prepared according to the process of claim 9.
Claim 16
Dependent Claim
16 words
A polymer comprising the reaction product of a polyisocyanate and the polymer polyahl of claim 11.
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) | 1989-04-07 | 1989-10-07 | 1990-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-07 | 1993-10-07 | 1994-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-07 | 1997-10-07 | 1998-04-08 | $7700.00 | Window Closed / Lapsed |