US4085092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent, optically clear poly(lactone-urethane) interlayers for laminated safety glass
Assignee: PPG Industries Inc
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Filing: 1976-09-30
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Granted: 1978-04-18
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Expires: 1996-09-30
Abstract
Abstract Energy-absorbing interlayers and glass laminates prepared therefrom for use as automobile windshields and other safety glass applications are disclosed. The interlayers are made from a poly(lactone-urethane) in which the molecular weight and structure of the lactone moiety is carefully controlled so as to get optimum energy-absorbing and optical properties.
Inventors
- 👤 Wen-Hsuan Chang
- 👤 Vernon G. Ammons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:00
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10688; B32B17/1077; B32B17/10779; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4266; C08G18/4269; C08G18/65; C08G18/66; C08G18/6633; C08G18/6637; C08G18/664; C08G18/6644; C09; C09J; C09J175/00; C09J175/04; C09J175/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31598; Y10T428/31601
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
152 words
A non-blooming energy-absorbing polyurethane interlayer comprising the polymerizate of: (A) an organic polyisocyanate, (B) a polylactone polyol having a hydroxyl number within the range of 62 to 140 inclusive formed from polymerizing an unsubstituted lactone having 6 to 8 carbon atoms with an organic polyhydroxyl-containing compound selected from the class consisting of: (1) aliphatic diols free of alkyl substitution and oxyalkylated products of these diols, (2) a hydroxyl-terminated polyester having a hydroxyl number below 600 formed from an organic polycarboxylic acid containing from 3 to 10 carbon atoms and aliphatic diols free of alkyl substitution and oxyalkylated products of these diols, (C) a compound containing at least two active hydrogens per molecule reactive with the isocyanate group having a molecular weight less than 250 selected from the class consisting of aliphatic diols free of alkyl substitution, aliphatic triols and mixtures thereof; the equivalent ratio of (A)/(B)/(C) being within the following range: 1.35-4.4/1.000/0.5-3.
Claim 2
Dependent Claim
152 words
A non-blooming energy-absorbing polyurethane interlayer comprising the polymerizate of: (A) an organic polyisocyanate, (B) a polylactone polyol having a hydroxyl number within the range of 62 to 140 inclusive formed from polymerizing an unsubstituted lactone having 6 to 8 carbon atoms with an organic polyhydroxyl-containing compound selected from the class consisting of: (1) aliphatic diols free of alkyl substitution and oxyalkylated products of these diols, (2) a hydroxyl-terminated polyester having a hydroxyl number below 600 formed from an organic polycarboxylic acid containing from 3 to 10 carbon atoms and aliphatic diols free of alkyl substitution and oxyalkylated products of these diols, (C) a compound containing at least two active hydrogens per molecule reactive with the isocyanate group having a molecular weight less than 250 selected from the class consisting of aliphatic diols free of alkyl substitution, aliphatic triols and mixtures thereof; the equivalent ratio of (A)/(B)/(C) being within the following range: 1.35-4.4/1.000/0.5-3.
Claim 3
Dependent Claim
14 words
The interlayer of claim 1 in which the organic polyisocyanate is an organic diisocyanate.
Claim 4
Dependent Claim
13 words
The interlayer of claim 2 which the organic diisocyanate is an aliphatic diisocyanate.
Claim 5
Dependent Claim
14 words
The interlayer of claim 3 in which the aliphatic diisocyanate is a cycloaliphatic diisocyanate.
Claim 6
Dependent Claim
32 words
The interlayer of claim 4 in which the cycloaliphatic diisocyanate is 4,4'-methylene-bis-(cyclohexyl isocyanate), wherein about 55 percent of the NCO groups are trans and 45 percent of the NCO groups are cis.
Claim 7
Dependent Claim
23 words
The interlayer of claim 1 in which the aliphatic diol (1) is a hydroxy-terminated alkylene diol containing from 2 to 10 carbon atoms.
Claim 8
Dependent Claim
23 words
The interlayer of claim 6 in which the alkylene diol is selected from the class consisting of ethylene glycol, 1,4-butanediol, 1,5-pentanediol and 1,6-hexanediol.
Claim 9
Dependent Claim
19 words
The interlayer of claim 1 in which the hydroxyl-terminated polyester (2) has a hydroxyl number between 140 to 300.
Claim 10
Dependent Claim
30 words
The interlayer of claim 1 in which the aliphatic diol used to prepare the hydroxy-terminated polyester (2) is selected from the class consisting of ethylene glycol, 1,4-butanediol, 1,5-pentanediol and 1,6-hexanediol.
Claim 11
Dependent Claim
12 words
The interlayer of claim 1 in which the unsubstituted lactone is epsilon-caprolactone.
Claim 12
Dependent Claim
25 words
The interlayer of claim 1 which has a thickness of from 15 to 60 mils (38.10 × 10 -5 to 152.40 × 10 -5 m).
Claim 13
Dependent Claim
18 words
The interlayer of claim 1 in which the compound (C) is an aliphatic polyol free of alkyl substitution.
Claim 14
Dependent Claim
22 words
The interlayer of claim 12 in which the aliphatic polyol is selected from the class consisting of diols, triols and mixtures thereof.
Claim 15
Dependent Claim
20 words
The interlayer of claim 13 in which the aliphatic polyol is selected from the class consisting of 1,4-butanediol and trimethylolpropane.
Claim 16
Dependent Claim
32 words
The interlayer of claim 1 which is of substantially uniform thickness with the rate of change in thickness of the interlayer being sufficiently small to produce a diopter of less than 0.006.
Claim 17
Dependent Claim
23 words
The interlayer of claim 1 which has a minimum light transmission of greater than 70 percent and has less than 2 percent haze.
Claim 18
Dependent Claim
116 words
The polyurethane interlayer of claim 1 which has a mean penetration velocity at 0° F., 70° F. and 120° F. (-18° C., 21° C. and 49° C.) of at least 20 miles per hour (32.180 km/hr) when an approximately 0.030-0.040 inch (0.0762 × 10 -2 to 0.1016 × 10 -2 m) thick sample of the polyurethane interlayer is laminated to a 1/8 inch (0.3175 × 10 -2 m) thick 12 inch by 12 inch (30.48 × 10 -2 m by 30.48 × 10 -2 m) float glass sheet to form a bilayer laminate and the laminate held rigid and impacted on the polyurethane side with a 5-pound (22.675 × 10 -1 kg) freely falling steel ball.
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) | 1981-04-17 | 1981-10-17 | 1982-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-17 | 1985-10-17 | 1986-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-17 | 1989-10-17 | 1990-04-18 | $7700.00 | Window Closed / Lapsed |