Patent US1226699A successfully refreshed from Google Patents.
US4574137A
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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: 1986-03-04
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Expires: 2004-08-23
Abstract
Abstract Copolymer polyols are prepared by polymerizing an ethylenically unsaturated monomer in a polyahl mixture in the presence of iodine or an iodine-releasing inorganic compound. The use of the iodine or iodine-releasing inorganic 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
2026-10-28 09:57
CPC Classifications
C; C08; C08F; C08F290/00; C08F290/08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/63; C08G18/635; C08G18/70; C08G18/81; C08G18/8108
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
93 words
In a process for preparing a polymer polyahl comprising polymerizing an ethylenically unsaturated monomer or mixtures 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 halogen selected from chlorine, bromine and iodine, an interhalogen in which the atoms are selected from chlorine, bromine or iodine or an iodine-releasing inorganic compound, said halogen, interhalogen or iodine-releasing inorganic compound being present in an amount sufficient to provide improved stability to said copolymer polyahl.
Claim 2
Dependent Claim
93 words
In a process for preparing a polymer polyahl comprising polymerizing an ethylenically unsaturated monomer or mixtures 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 halogen selected from chlorine, bromine and iodine, an interhalogen in which the atoms are selected from chlorine, bromine or iodine or an iodine-releasing inorganic compound, said halogen, interhalogen or iodine-releasing inorganic compound being present in an amount sufficient to provide improved stability to said copolymer polyahl.
Claim 3
Dependent Claim
16 words
The improved process of claim 1 wherein the polymerization is conducted in the presence of iodine.
Claim 4
Dependent Claim
19 words
The process of claim 1 wherein the polymerization is conducted in the presence of iodine chloride or iodine bromide.
Claim 5
Dependent Claim
18 words
The process of claim 1 wherein the polymerization is conducted in the presence of an iodine-releasing inorganic compound.
Claim 6
Dependent Claim
27 words
The process of claim 4 wherein the iodine releasing inorganic compound comprises ZrI 4 , SbI 3 , PI 3 , PI 5 or AsI 3 .
Claim 7
Dependent Claim
15 words
The process of claim 4 wherein the iodine-releasing inorganic compound is an iodine-containing organometal compound.
Claim 8
Dependent Claim
36 words
The improved process of claim 1 where the iodine or iodine-releasing inorganic compound is employed in an amount from about 0.1 to about 2 percent by weight of the ethylenically unsaturated monomer or mixture of monomers.
Claim 9
Dependent Claim
16 words
The improved process of claim 1 wherein the polyahl or polyahl mixture contains graft polymerization sites.
Claim 10
Dependent Claim
17 words
The improved process of claim 8 wherein the polyahl or polyahl mixture contains purposefully introduced ethylenic unsaturation.
Claim 11
Dependent Claim
50 words
The improved process of claim 9 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 12
Dependent Claim
16 words
The improved process of claim 10 wherein the difunctional compound is an ethylenically unsaturated carboxylic acid.
Claim 13
Dependent Claim
15 words
The improved process of claim 10 wherein the difunctional compound is an ethylenically unsaturated isocyanate.
Claim 14
Dependent Claim
18 words
The improved process of claim 12 wherein the difunctional compound is an isocyanatoalkylester of acrylic or methacrylic acid.
Claim 15
Dependent Claim
15 words
The improved process of claim 1 wherein said monomer comprises styrene, acrylonitrile, or mixtures thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-03 | 1989-09-02 | 1990-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-03 | 1993-09-02 | 1994-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-03 | 1997-09-02 | 1998-03-04 | $7700.00 | Window Closed / Lapsed |