Patent US4123588A successfully refreshed from Google Patents.
US4123588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminates
Assignee: General Electric Co
•
Filing: 1977-01-24
•
Granted: 1978-10-31
•
Expires: 1997-01-24
Abstract
Abstract Polysiloxane-polycarbonate block copolymers provide ductile, structural adhesive layers for bonding laminates. They are particularly useful as an adhesive and structural element in preparing polycarbonate containing composites which retain their integrity. Laminates of glass, polycarbonate, other resins separately and in various combinations and the adhesive layer provide glazing and structural units of relatively light weight and thickness which have good energy absorption, clarity, strength and integrity and are penetration resistant over a wide range of temperatures.
Inventors
- 👤 Richard E. Molari, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:12
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10798; B32B17/10009; B32B17/10018; B32B17/10036; B32B17/10165; B32B17/10376; B32B17/10688; B32B17/10752; B32B27/00; B32B27/36; C; C08; C08G; C08G77/00; C08G77/42; C08G77/448; B32B2307/00; B32B2307/20; B32B2307/202; B32B2307/50; B32B2307/56; Y; Y10; Y10S; Y10S428/00; Y10S428/911; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31645; Y10T428/31649; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
141 words
A laminate of an acrylic polymer and other material selected from the group comprising solid resinous material, glass, wood, ceramics, metals and cermets and having as adhesive interlayer block polysiloxane-polycarbonate copolymer prepared by reacting (A) a halogen chain-stopped polydiorganosiloxane composed of from about 5 to 200 chemically combined diorganosiloxy units consisting essentially of dialkylsiloxy units which are connected to each other by silicon-oxygen-silicon linkages wherein each of the silicon atoms has two organo radicals attached through a carbon-silicon bond, and (B) a dihydric phenol having the formula ##STR6## where Z is a member selected from the class consisting of hydrogen, lower alkyl radicals and halogen radicals and combinations thereof, and R is a member selected from the class consisting of hydrogen, hydrocarbon and halogenated hydrocarbon radicals, and phosgenating the purified reaction product until the resulting copolymer achieves a maximum intrinsic viscosity.
Claim 2
Dependent Claim
141 words
A laminate of an acrylic polymer and other material selected from the group comprising solid resinous material, glass, wood, ceramics, metals and cermets and having as adhesive interlayer block polysiloxane-polycarbonate copolymer prepared by reacting (A) a halogen chain-stopped polydiorganosiloxane composed of from about 5 to 200 chemically combined diorganosiloxy units consisting essentially of dialkylsiloxy units which are connected to each other by silicon-oxygen-silicon linkages wherein each of the silicon atoms has two organo radicals attached through a carbon-silicon bond, and (B) a dihydric phenol having the formula ##STR6## where Z is a member selected from the class consisting of hydrogen, lower alkyl radicals and halogen radicals and combinations thereof, and R is a member selected from the class consisting of hydrogen, hydrocarbon and halogenated hydrocarbon radicals, and phosgenating the purified reaction product until the resulting copolymer achieves a maximum intrinsic viscosity.
Claim 3
Dependent Claim
12 words
A laminate as in claim 1 wherein the other material is acrylic.
Claim 4
Dependent Claim
12 words
A laminate as in claim 1 wherein the other material is glass.
Claim 5
Dependent Claim
15 words
A laminate as in claim 1 wherein the other material is a solid resinous material.
Claim 6
Dependent Claim
13 words
A laminate as in claim 4 wherein the solid resinous material is polycarbonate.
Claim 7
Dependent Claim
12 words
A laminate as in claim 1 having included therein electrically conductive material.
Claim 8
Dependent Claim
22 words
A laminate as in claim 3 wherein the glass surface adjacent to the block copolymer are primed with an adhesion promoting primer.
Claim 9
Dependent Claim
16 words
A laminate as in claim 5 wherein the exposed surface of polycarbonate has a mar-resistant coating.
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) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |