US3620900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic laminate structure having elastomer particles in alternate layers
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1968-10-11
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Granted: 1971-11-16
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Expires: 1988-10-11
Abstract
Abstract This invention concerns a laminate, possessing high reverse impact strength, comprising layers of thermosetting resin wherein alternate layers and the outermost layers, have incorporated therein a dispersion of elastomeric particles.
Inventors
- 👤 Ervin J Williger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:40
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/003; B29K; B29K2309/00; B29K2309/08; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/254; Y10T428/31504; Y10T428/31786; Y10T428/31794; Y10T428/31942
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
16 words
The laminate of claim 1, wherein said cured layers of thermosetting resin compound contain reinforcing fibers.
Claim 2
Dependent Claim
12 words
The laminate of claim 2, wherein said reinforcing fibers are glass fibers.
Claim 3
Dependent Claim
63 words
The laminate, as described in any one of claims 1, 2 and 3, wherein said normally solid elastomeric particles are present in the amount of 2 to 15 parts by weight per 100 parts by weight of said thermosetting resin in the specific layer containing said particles, said normally solid elastomeric particles having been added to the uncured liquid resin in solid form.
Claim 4
Dependent Claim
88 words
In a hard surfaced plastic laminate, consisting of cured layers of fiber-reinforced thermosetting resin compound, a method of improving the laminates'' overall reverse impact strength, comprising physically dispersing from 2 to 20 parts by weight of normally solid elastomeric particles having a mean particle diameter between 0.1 and 300 microns per 100 parts by weight of said thermosetting resin in alternate layers and in the cover layers during formation of said laminate, said normally solid elastomeric particles having been added to the uncured liquid resin in solid form.
Claim 5
Dependent Claim
22 words
The laminate, as described in any one of claims 1, 2, and 3 wherein said thermosetting resin compound comprises a polyester resin.
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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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |