US4169181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact resistant soft coated laminates and process for making the same
Assignee: General Electric Co
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Filing: 1977-11-29
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Granted: 1979-09-25
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Expires: 1997-11-29
Abstract
Abstract Improved impact or shock resistant soft coated laminates including a back polycarbonate lamina opposite the direction of impact or shock, such polycarbonate lamina having a soft overlying or exposed layer or coating opposite the direction of impact, are provided. The laminates exhibit excellent resistance to failure and spalling of the polycarbonate surface opposite the impact or shock receiving surface. The soft coat is a self-healing, chemically resistant polyurethane having an excess of free hydroxyl groups over isocyanate groups and confers on the laminates excellent scratch resistance, good resistance against swelling and stress cracking while at the same time the laminates exhibit good clarity and integrity in addition to good chemical and permeation resistance, as well as resistance to failure and spalling. The process employs the polyurethane in film form as a cap sheet.
Inventors
- 👤 Richard E. Molari, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:09
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B29; B29D; B29D11/00; B29D11/0073; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10018; B32B17/10036; B32B17/10045; B32B17/10055; B32B17/1055; B32B17/10688; B32B17/10761; B32B27/30; B32B27/308; B32B27/36; B32B27/365; B32B27/40; B32B7/00; B32B7/04; B32B7/12; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4829; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/7806; C08G18/7818; C08G18/7831; F; F41; F41H; F41H5/00; F41H5/02; F41H5/04; F41H5/0407; B32B2307/00; B32B2307/50; B32B2307/558; B32B2307/56; B32B2307/70; B32B2307/762; B32B2315/00; B32B2315/08; B32B2333/00; B32B2369/00; B32B2375/00; Y; Y10; Y10S; Y10S428/00; Y10S428/911; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/24983; Y10T428/31504; Y10T428/31507; Y10T428/31551; Y10T428/31598; Y10T428/31601; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
42 words
An impact and shock-resistant laminate comprising a plurality of laminae including a back polycarbonate layer and a soft, overlying, exposed layer, opposite the direction of impact, of a self-healing, chemically resistant polyurethane having an excess of free hydroxyl groups over isocyanate groups.
Claim 2
Dependent Claim
42 words
An impact and shock-resistant laminate comprising a plurality of laminae including a back polycarbonate layer and a soft, overlying, exposed layer, opposite the direction of impact, of a self-healing, chemically resistant polyurethane having an excess of free hydroxyl groups over isocyanate groups.
Claim 3
Dependent Claim
20 words
A laminate according to claim 1 including a mar-resistant coating on the exposed, impact receiving surface of the polycarbonate layer.
Claim 4
Dependent Claim
26 words
A laminate according to claim 2 wherein the mar-resistant coating is a self-healing chemically resistant polyurethane having an excess of free hydroxyl groups over isocyanate groups.
Claim 5
Dependent Claim
59 words
An impact and shock-resistant laminate comprising a plurality of laminae including a back polycarbonate layer coated with a soft, overlying, exposed layer, opposite the direction of impact, of a self-healing, chemically resistant polyurethane having an excess of free hydroxyl groups over isocyanate groups, at least one layer of other material and at least one interlayer of a compatible adhesive.
Claim 6
Dependent Claim
59 words
An impact and shock-resistant laminate comprising a plurality of laminae including a back polycarbonate layer coated with a soft, overlying, exposed layer, opposite the direction of impact, of a self-healing, chemically resistant polyurethane having an excess of free hydroxyl groups over isocyanate groups, at least one layer of other material and at least one interlayer of a compatible adhesive.
Claim 7
Dependent Claim
14 words
A laminate according to claim 4 wherein the adhesive interlayer is polysiloxane-polycarbonate block copolymer.
Claim 8
Dependent Claim
155 words
A laminate according to claim 4 wherein the adhesive interlayer is a polysiloxane-polycarbonate block copolymer having the average formula: ##STR6## wherein n is at least 1, a is equal to from 1 to about 200 inclusive, b has an average value from about 15 to about 90, the ratio of a to b can vary from about 0.05 to about 3 inclusive d is 1 or more, y is ##STR7## A is a member selected from the group consisting of hydrogen and ##STR8## R is a member selected from the group consisting of hydrogen, monovalent hydrocarbon radicals and halogenated monovalent hydrocarbon radicals, R' is a member selected from the group consisting of monovalent hydrocarbon radicals and cyanoalkyl radicals, R" is a member selected from the group consisting of monovalent hydrocarbon radicals and halogenated hydrocarbon radicals, and Z is a member selected from the group consisting of hydrogen, halogen and lower alkyl radicals and mixtures thereof.
Claim 9
Dependent Claim
36 words
A laminate according to claim 6 wherein in formula I n is an integer equal from 1 to about 1000 inclusive and the ratio of a to b is from about 0.067 to about 0.45 inclusive.
Claim 10
Dependent Claim
12 words
A laminate according to claim 4 wherein the other material is polycarbonate.
Claim 11
Dependent Claim
14 words
A laminate according to claim 4 wherein the other material is solid resinous material.
Claim 12
Dependent Claim
15 words
A laminate according to claim 9 wherein the solid resinous material is an acrylic resin.
Claim 13
Dependent Claim
12 words
A laminate according to claim 4 wherein the other material is glass.
Claim 14
Dependent Claim
18 words
A laminate according to claim 4 including a mar-resistant coating on the exposed surface of the other material.
Claim 15
Dependent Claim
26 words
A laminate according to claim 12 wherein the mar-resistant coating is a self-healing, chemically resistant polyurethane having an excess of free hydroxyl groups over isocyanate groups.
Claim 16
Dependent Claim
9 words
A laminate according to claim 4 which is symmetrical.
Claim 17
Dependent Claim
18 words
A laminate according to claim 14 including a mar-resistant coating on the exposed surface of the other material.
Claim 18
Dependent Claim
26 words
A laminate according to claim 15 wherein the mar-resistant coating is a self-healing, chemically resistant polyurethane having an excess of free hydroxyl groups over isocyanate groups.
Claim 19
Dependent Claim
55 words
An impact and shock-resistant laminate comprising a plurality of laminae including a back polycarbonate layer coated with a soft, overlying exposed layer, opposite the direction of impact, of a self-healing, chemically resistant polyurethane having an excess of free hydroxyl groups over isocyanate groups, a polysiloxane-polycarbonate block copolymer adhesive interlayer and an outboard layer of polycarbonate.
Claim 20
Dependent Claim
55 words
An impact and shock-resistant laminate comprising a plurality of laminae including a back polycarbonate layer coated with a soft, overlying exposed layer, opposite the direction of impact, of a self-healing, chemically resistant polyurethane having an excess of free hydroxyl groups over isocyanate groups, a polysiloxane-polycarbonate block copolymer adhesive interlayer and an outboard layer of polycarbonate.
Claim 21
Dependent Claim
19 words
A laminate according to claim 17 including a mar-resistant coating on the exposed surface of the outboard polycarbonate layer.
Claim 22
Dependent Claim
26 words
A laminate according to claim 18 wherein the mar-resistant coating is a self-healing, chemically resistant polyurethane having an excess of free hydroxyl groups over isocyanate groups.
Claim 23
Dependent Claim
68 words
An impact and shock-resistant laminate comprising a plurality of laminae including a back polycarbonate layer coated with a soft, overlying exposed layer, opposite the direction of impact, of a self-healing, chemically resistant polyurethane having an excess of free hydroxyl groups over isocyanate groups, an outboard layer of polycarbonate, a layer of polycarbonate disposed between the back and outboard polycarbonate layers and polysiloxane-polycarbonate adhesive interlayers between said polycarbonate layers.
Claim 24
Dependent Claim
68 words
An impact and shock-resistant laminate comprising a plurality of laminae including a back polycarbonate layer coated with a soft, overlying exposed layer, opposite the direction of impact, of a self-healing, chemically resistant polyurethane having an excess of free hydroxyl groups over isocyanate groups, an outboard layer of polycarbonate, a layer of polycarbonate disposed between the back and outboard polycarbonate layers and polysiloxane-polycarbonate adhesive interlayers between said polycarbonate layers.
Claim 25
Dependent Claim
19 words
A laminate according to claim 20 including a mar-resistant coating on the exposed surface of the outboard polycarbonate layer.
Claim 26
Dependent Claim
26 words
A laminate according to claim 21 wherein the mar-resistant coating is a self-healing, chemically resistant polyurethane having an excess of free hydroxyl groups over isocyanate groups.
Claim 27
Dependent Claim
34 words
A process for making an impact and shock-resistant laminate comprising applying a polyurethane film having an excess of free hydroxyl groups over isocyanate groups to a polycarbonate sheet layer with the application of heat.
Claim 28
Dependent Claim
34 words
A process for making an impact and shock-resistant laminate comprising applying a polyurethane film having an excess of free hydroxyl groups over isocyanate groups to a polycarbonate sheet layer with the application of heat.
Claim 29
Dependent Claim
14 words
A process according to claim 23 including subjecting the laid up layer to pressure.
Claim 30
Dependent Claim
61 words
A process for making an impact and shock-resistant laminate comprising applying a primer to a polyurethane film having an excess of free hydroxyl groups over isocyanate groups, applying the primed film as a cap sheet to a polycarbonate sheet, subjecting the laid up sheets to heat and pressure and forming a laminate having a soft coated polyurethane inboard layer of polycarbonate.
Claim 31
Dependent Claim
61 words
A process for making an impact and shock-resistant laminate comprising applying a primer to a polyurethane film having an excess of free hydroxyl groups over isocyanate groups, applying the primed film as a cap sheet to a polycarbonate sheet, subjecting the laid up sheets to heat and pressure and forming a laminate having a soft coated polyurethane inboard layer of polycarbonate.
Claim 32
Dependent Claim
98 words
A process for making an impact and shock-resistant laminate comprising applying a primer in a thickness in a range of about 500 A to about 2000 A to a polyurethane film, having an excess of free hydroxyl over isocyanate groups, applying the primed polyurethane film as a cap sheet to a polycarbonate sheet and subjecting the laid up sheets to a temperature in a range of from about 250° F. to about 300° F. and a uniform pressure for a time sufficient to laminate said laid up sheets and forming a soft coated polyurethane inboard layer of polycarbonate.
Claim 33
Dependent Claim
98 words
A process for making an impact and shock-resistant laminate comprising applying a primer in a thickness in a range of about 500 A to about 2000 A to a polyurethane film, having an excess of free hydroxyl over isocyanate groups, applying the primed polyurethane film as a cap sheet to a polycarbonate sheet and subjecting the laid up sheets to a temperature in a range of from about 250° F. to about 300° F. and a uniform pressure for a time sufficient to laminate said laid up sheets and forming a soft coated polyurethane inboard layer of polycarbonate.
Claim 34
Dependent Claim
21 words
A process according to claim 26 wherein the primer comprises 6.8% trimethylolpropane, 21.4% diethylene glycol, 38% azelaic acid and 33.8% urethane.
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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) | 1982-09-24 | 1983-03-26 | 1983-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-24 | 1987-03-26 | 1987-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-24 | 1991-03-26 | 1991-09-25 | $7700.00 | Window Closed / Lapsed |