US3969206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for stabilization of ultraviolet light curable unsaturated polyester resin mixture
Assignee: Akzona Inc
•
Filing: 1973-06-18
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Granted: 1976-07-13
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Expires: 1993-06-18
Abstract
Abstract A process for stabilizing an ultraviolet light curable unsaturated polyester resin mixture containing a benzoin compound as a photosensitizer is disclosed. A stabilizing amount of a compound of the formula WHEREIN A is a methyl group, B is a hydrogen atom or A and B together represent a substituted or non-substituted benzo group is added to the mixture which can also contain a filler, a quaternary ammonium compound and a copper or iron compound soluble in the unsaturated polyester resin. The composition and cured product are also disclosed.
Inventors
- 👤 Lodewijk Roskott
- 👤 Arnoldus Adrianus Maria Groenendaal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:22
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/07; C08K5/08; C08F; C08F283/00; C08F283/01
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
66 words
A process for stabilizing a composition curable by ultraviolet light consisting essentially of an unsaturated polyester resin which is a mixture of an unsaturated polyester resin obtained by condensation of a polyhydric alcohol and and α, β unsaturated dibasic carboxylic acid and at least one polymerizable ethylenically unsaturated monomer and as photosensitizer a benzoin compound comprising incorporating into said composition a stabilizing amount of methyl p-benzoquinone.
Claim 2
Dependent Claim
66 words
A process for stabilizing a composition curable by ultraviolet light consisting essentially of an unsaturated polyester resin which is a mixture of an unsaturated polyester resin obtained by condensation of a polyhydric alcohol and and α, β unsaturated dibasic carboxylic acid and at least one polymerizable ethylenically unsaturated monomer and as photosensitizer a benzoin compound comprising incorporating into said composition a stabilizing amount of methyl p-benzoquinone.
Claim 3
Dependent Claim
27 words
The process of claim 1, wherein the stabilizer compound is incorporated into said mixture in an amount of 0.5 - 2.0% by weight, calculated on the photosensitizer.
Claim 4
Dependent Claim
16 words
The process of claim 2, wherein the stabilizer compound is present in an amount of 1.0%.
Claim 5
Dependent Claim
26 words
The process of claim 1, wherein said benzoin compound is present in an amount of 0.1 to 5.0% by weight, calculated on the unsaturated polyester resin.
Claim 6
Dependent Claim
34 words
The process of claim 1, wherein said benzoin compound is selected from the group consisting of benzoin methylether, benzoin ethylether, benzoin isopropylether, benzoin isobutylether, benzoin sec.butylether, benzoin cyclohexylether, anisoin, p,p'-dimethyl benzoin and o,o'-dichloro benzoin.
Claim 7
Dependent Claim
14 words
The process of claim 1, wherein said mixture further contains a quaternary ammonium compound.
Claim 8
Dependent Claim
27 words
The process of claim 6, wherein said quaternary ammonium compound is present in an amount of 0.02 - 0.05% by weight, calculated on the unsaturated polyester resin.
Claim 9
Dependent Claim
19 words
The process of claim 1, wherein said mixture further contains a copper compound soluble in said unsaturated polyester resin.
Claim 10
Dependent Claim
12 words
The process of claim 8, wherein said copper compound is copper naphthenate.
Claim 11
Dependent Claim
19 words
The process of claim 1, wherein said mixture further contains an iron compound soluble in said unsaturated polyester resin.
Claim 12
Dependent Claim
12 words
The process of claim 10, wherein said iron compound is iron chloride.
Claim 13
Dependent Claim
11 words
The process of claim 1 wherein said mixture contains a filler.
Claim 14
Dependent Claim
34 words
The process of claim 12, wherein said filler is selected from the group consisting of calcium carbonate, calcium magnesium carbonate, magnesium silicate, calcium magnesium silicate, aluminum silicate, silicon oxide, barium sulfate, and calcium sulfate.
Claim 15
Dependent Claim
64 words
A stabilized composition curable by ultraviolet light consisting essentially of an unsaturated polyester resin which is a mixture of an unsaturated polyester resin obtained by condensation of a polyhydric alcohol and an α, β unsaturated dibasic carboxylic acid and at least one polymerizable ethylenically unsaturated monomer, a benzoin compound as a photosensitizer and methyl p-benzoquinone present in an amount sufficient to stabilize said composition.
Claim 16
Dependent Claim
64 words
A stabilized composition curable by ultraviolet light consisting essentially of an unsaturated polyester resin which is a mixture of an unsaturated polyester resin obtained by condensation of a polyhydric alcohol and an α, β unsaturated dibasic carboxylic acid and at least one polymerizable ethylenically unsaturated monomer, a benzoin compound as a photosensitizer and methyl p-benzoquinone present in an amount sufficient to stabilize said composition.
Claim 17
Dependent Claim
29 words
A process for curing unsaturated polyester resin comprising irradiating the composition of claim 14 with a light source having an emission in a range of 300 to 400 n.m.
Claim 18
Dependent Claim
11 words
A cured polyester resin produced by the process of claim 15.
Claim 19
Dependent Claim
24 words
The composition of claim 14, wherein said stabilizing compound is present in an amount of 0.5 - 2.0% by weight, calculated on the photosensitizer.
Claim 20
Dependent Claim
26 words
The composition of claim 4, wherein said benzoin compound is present in an amount of 0.1 to 5.0% by weight, calculated on the unsaturated polyester resin.
Claim 21
Dependent Claim
34 words
The composition of claim 14, wherein said benzoin compound is selected from the group consisting of benzoin methylether, benzoin ethylether, benzoin isopropylether, benzoin isobutylether, benzoin sec.butylether, benzoin cyclohexylether, anisoin, p,p'-dimethyl benzoin and o,o'-dichloro benzoin.
Claim 22
Dependent Claim
26 words
The composition of claim 14 further containing a quaternary ammonium compound in an amount of 0.02 - 0.05% by weight, calculated on the unsaturated polyester resin.
Claim 23
Dependent Claim
16 words
The composition of claim 14 further containing a copper compound soluble in said unsaturated polyester resin.
Claim 24
Dependent Claim
12 words
The composition of claim 14 wherein said copper compound is copper naphthenate.
Claim 25
Dependent Claim
16 words
The composition of claim 14 further containing an iron compound soluble in said unsaturated polyester resin.
Claim 26
Dependent Claim
12 words
The composition of claim 14 wherein said iron compound is iron chloride.
Claim 27
Dependent Claim
9 words
The composition of claim 14 further containing a filler.
Claim 28
Dependent Claim
34 words
The composition of claim 25 wherein said filler is selected from the group consisting of calcium carbonate, calcium magnesium carbonate, magnesium silicate, calcium magnesium silicate, aluminum silicate, silicon oxide, barium sulfate, and calcium sulfate.
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) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |