US4464525A
Expired / Lapsed
US
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Near infrared absorbing polymerizate, from dicarboxylic compound, diol bis(allyl carbonate) and metal hexacarbonyl
Assignee: PPG Industries Inc
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Filing: 1983-04-11
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Granted: 1984-08-07
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Expires: 2003-04-11
Abstract
Abstract Disclosed is an optically clear casting prepared by polymerizing a composition comprising (1) a diol bis(allyl carbonate) monomer, e.g., diethylene glycol bis(allyl carbonate), (2) from about 1 to about 10 weight percent of a saturated aliphatic or aromatic dicarboxylic acid containing from 3 to 10 carbon atoms, e.g., succinic acid and phthalic acid or the anhydrides of succinic acid and phthalic acid, and (3) an infrared absorbing amount, e.g., 1.5 to 4.0 weight percent, of a metal hexacarbonyl, e.g., tungsten, molybdenum or vanadium hexacarbonyl. The castings are capable of absorbing near infrared radiation and are useful as optical, e.g., ophthalmic, lenses.
Inventors
- 👤 Jeffrey D. Vance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:10
CPC Classifications
C; C08; C08F; C08F18/00; C08F18/24; G; G02; G02B; G02B1/00; G02B1/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
125 words
A solid near infrared absorbing polymerizate of (1) a member selected from the group consisting of (a) saturated aliphatic dicarboxylic acid having the formula, HOOC--(CH 2 ) n --COOH, wherein n is an integer from 1 to 8, (b) aromatic dicarboxylic acid selected from the group consisting of phthalic acid, isophthalic acid and terephthalic acid, and (c) acid anhydrides selected from the group consisting of phthalic acid anhydride and acid anhydrides having the formula, ##STR5## wherein m is 2 or 3, (2) diol bis(allyl carbonate), and (3) a near infrared absorbing amount of a metal hexacarbonyl selected from the group consisting of tungsten hexacarbonyl, molybdenum hexacarbonyl and vanadium hexacarbonyl, the acid or anhydride of (1) being present in amounts sufficient to solubilize the metal hexacarbonyl.
Claim 2
Dependent Claim
125 words
A solid near infrared absorbing polymerizate of (1) a member selected from the group consisting of (a) saturated aliphatic dicarboxylic acid having the formula, HOOC--(CH 2 ) n --COOH, wherein n is an integer from 1 to 8, (b) aromatic dicarboxylic acid selected from the group consisting of phthalic acid, isophthalic acid and terephthalic acid, and (c) acid anhydrides selected from the group consisting of phthalic acid anhydride and acid anhydrides having the formula, ##STR5## wherein m is 2 or 3, (2) diol bis(allyl carbonate), and (3) a near infrared absorbing amount of a metal hexacarbonyl selected from the group consisting of tungsten hexacarbonyl, molybdenum hexacarbonyl and vanadium hexacarbonyl, the acid or anhydride of (1) being present in amounts sufficient to solubilize the metal hexacarbonyl.
Claim 3
Dependent Claim
25 words
The infrared absorbing polymerizate of claim 1 wherein the acid anhydride is chosen from the group consisting of succinic acid anhydride and phthalic acid anhydride.
Claim 4
Dependent Claim
28 words
The infrared absorbing polymerizate of claim 1 wherein the concentration of dicarboxlic acid or acid anydride is from about 1.0 to 10 weight percent, basis diol bis(allyl carbonate).
Claim 5
Dependent Claim
26 words
The infrared absorbing polymerizate of claim 2 wherein the concentration of acid anhydride is from about 1.0 to about 10.0 weight percent, basis diol bis(allyl carbonate).
Claim 6
Dependent Claim
78 words
The infrared absorbing polymerizate of claim 1 wherein the diol bis(allyl carbonate) is represented by the formula: ##STR6## where R 1 and R 3 are allyl groups independently represented by the formula: ##STR7## where R 4 is chosen from the group consisting of hydrogen, halogen, and C 1 to C 4 alkyl groups, and R 2 is chosen from the group consisting of alkylene groups, alkylene ether groups, alkylene polyether groups, alkylene carbonate groups, and alkylene polycarbonate groups.
Claim 7
Dependent Claim
17 words
The infrared absorbing polymerizate of claim 5 wherein the diol bis(allyl carbonate) is diethylene glycol bis(allyl carbonate).
Claim 8
Dependent Claim
25 words
The infrared absorbing polymerizate of claim 6 wherein the acid anhydride is succinic acid anhydride or phthalic anhydride and the metal carbonyl is tungsten hexacarbonyl.
Claim 9
Dependent Claim
48 words
The infrared absorbing polymerizate of claim 7 wherein the concentration of acid anhydride is from about 1.0 to about 10.0 weight percent, basis the diol bis(allyl carbonate), and the tungsten hexacarbonyl is present in amounts of from 1.5 to about 4.0 weight percent, basis the diol bis(allyl carbonate).
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) | 1987-08-07 | 1988-02-06 | 1988-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-07 | 1992-02-06 | 1992-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-07 | 1996-02-06 | 1996-08-07 | $7700.00 | Window Closed / Lapsed |