Patent US4138385A successfully refreshed from Google Patents.
US4138385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted acetylacetonate cobaltic promoters for unsaturated polyester resin
Assignee: Air Products and Chemicals Inc
•
Filing: 1977-09-02
•
Granted: 1979-02-06
•
Expires: 1997-09-02
Abstract
Abstract This invention relates to an improvement in a process for curing unsaturated polyester resins, preferably chemically thickened with a Group II metal oxide or hydroxide, and to the resulting product. The improvement resides in the use of an acetylacetonate ligand of cobalt III, which is mono, di, or tri-substituted with an electron withdrawing group, e.g. a nitro, phenyl or halogen atom.
Inventors
- 👤 Melville W. Uffner
- 👤 Donald E. Jefferson
- 👤 Charles G. Coe
- 👤 Burton D. Beitchman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:38
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/04; C08F299/0442; C08F299/0464
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
90 words
In a process for curing a molding compound comprising an unsaturated polyester resin with an unsaturated monomer, soluble and copolymerizable therewith, the improvement which comprises: incorporating at least a proportion effective for enhancing the rate of cure at molding temperatures and enhancing shelf life at lower temperature of a cobalt (III) complex of the formula: ##STR2## wherein m can be 1, 2 or 3; m n can be 0, 1, and 2, and M + n = 3; and X is an electron withdrawing group, nonpolymerizable with said molding compound.
Claim 2
Dependent Claim
90 words
In a process for curing a molding compound comprising an unsaturated polyester resin with an unsaturated monomer, soluble and copolymerizable therewith, the improvement which comprises: incorporating at least a proportion effective for enhancing the rate of cure at molding temperatures and enhancing shelf life at lower temperature of a cobalt (III) complex of the formula: ##STR2## wherein m can be 1, 2 or 3; m n can be 0, 1, and 2, and M + n = 3; and X is an electron withdrawing group, nonpolymerizable with said molding compound.
Claim 3
Dependent Claim
42 words
The process of claim 1 wherein said electron withdrawing group is selected from the group consisting of halogen, nitro, formyl; aryl, cycloalkyl or alkyl carbonyl, phenyl, SCN, lower alkyl ester, organosulfonate, nitrile, thionyl halide, sulfenyl halide, haloalkyl, hydroxy, carboxyl and quaternary ammonium.
Claim 4
Dependent Claim
24 words
The process of claim 2 wherein a chemical thickener consisting of a Group II metal oxide or hydroxide is included in said molding compound.
Claim 5
Dependent Claim
34 words
The process of claim 3 wherein said cobalt III complex is provided in a proportion to provide from about 0.0005 to about 0.025 parts cobalt metal per 100 parts by weight unsaturated polyester resin.
Claim 6
Dependent Claim
21 words
The process of claim 4 wherein said chemical thickener is selected from the group consisting of magnesium oxide and magnesium hydroxide.
Claim 7
Dependent Claim
19 words
The process of claim 5 wherein said molding compound contains an effective proportion of a free radical initiating catalyst.
Claim 8
Dependent Claim
24 words
The process of claim 6 wherein said free radical initiating catalyst is selected from the group consisting of perester, a peroxide, and a hydroperoxide.
Claim 9
Dependent Claim
22 words
The process of claim 5 wherein said electron withdrawing group is selected from the group consisting of nitro, bromo, chloro, and phenyl.
Claim 10
Dependent Claim
16 words
The process of claim 7 wherein m in said cobalt III complex is at least 2.
Claim 11
Dependent Claim
24 words
The process of claim 9 wherein said cobalt III complex is selected from the group consisting of tris(3-nitroacetylacetonato) cobalt (III) and tris(3-bromoacetylacetonato) cobalt (III).
Claim 12
Dependent Claim
76 words
In a thermosettable molding compound comprising an unsaturated polyester resin and an unsaturated monomer soluble in and copolymerizable therewith, the improvement which comprises: a proportion of a cobalt (III) complex effective for enhancing the rate of cure represented by the formula: ##STR3## wherein m can be 1, 2 or 3; n can be 0, 1, and 2, and m + n = 3; and X is an electron withdrawing group, but nonpolymerizable with said molding compound.
Claim 13
Dependent Claim
76 words
In a thermosettable molding compound comprising an unsaturated polyester resin and an unsaturated monomer soluble in and copolymerizable therewith, the improvement which comprises: a proportion of a cobalt (III) complex effective for enhancing the rate of cure represented by the formula: ##STR3## wherein m can be 1, 2 or 3; n can be 0, 1, and 2, and m + n = 3; and X is an electron withdrawing group, but nonpolymerizable with said molding compound.
Claim 14
Dependent Claim
43 words
The molding compound of claim 11 wherein said electron withdrawing group is selected from the group consisting of halogen, nitro, formyl residue; an aryl, cycloalkyl or alkyl carbonyl, phenyl, lower alkyl ester, organosulfonate, nitrile, thionyl, sulfonyl halide, haloalkyl, hydroxyl, carboxyl, and quaternary ammonium.
Claim 15
Dependent Claim
25 words
The molding compound of claim 12 wherein a chemical thickener consisting of a Group II metal oxide or hydroxide is included in said molding compound.
Claim 16
Dependent Claim
34 words
The molding compound of claim 13 wherein said cobalt III complex is provided in proportion to provide from about 0.0005 to about 0.025 parts cobalt metal per 100 parts by weight unsaturated polyester resin.
Claim 17
Dependent Claim
22 words
The molding compound of claim 14 wherein said chemical thickener is selected from the group consisting of magnesium oxide and magnesium hydroxide.
Claim 18
Dependent Claim
20 words
The molding compound of claim 15 wherein said molding compound contains an effective proportion of a free radical initiating catalyst.
Claim 19
Dependent Claim
21 words
The molding compound of claim 16 wherein catalyst is selected from the group consisting of perester, a peroxide, and a hydroperoxide.
Claim 20
Dependent Claim
23 words
The molding compound of claim 17 wherein said electron withdrawing group is selected from the group consisting of nitro bromo, chloro and phenyl.
Claim 21
Dependent Claim
17 words
The molding compound of claim 18 wherein m in said cobalt III complex is at least 2.
Claim 22
Dependent Claim
25 words
The molding compound of claim 19 wherein said cobalt III complex is selected from the group consisting of tris(3-nitroacetylacetonato) cobalt (III) and tris(3-bromoacetylacetonato) cobalt (III).
References Cited (Backward Citations)
US3954664A
Cited
US3917730A
Cited
US3980583A
Cited
US3927056A
Cited
US4029865A
Cited
US3962189A
Cited
US3988290A
Cited
US4072631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |