US4425287A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of moldings from unsaturated polyester resins
Assignee: BASF SE
•
Filing: 1983-02-03
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Granted: 1984-01-10
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Expires: 2003-02-03
Abstract
Abstract A process for the production of moldings from unsaturated polyester resins wherein a mixture is first prepared from 1. an unsaturated polyester, 2. a copolymerizable vinyl compound, 3. an inhibitor, 4. a photoinitiator, 5. a thickener, preferably MgO, 6. a pulverulent auxiliary which transmits ultraviolet light and/or 7. a fibrous reinforcing material and 8. further conventional additives. This mixture is thickened, where appropriate after coating onto a sheet-like carrier, to form a semi-finished product, which is then finally shaped, and cured by UV irradiation after which it may or may not be heat-treated.
Inventors
- 👤 Anton Hesse
- 👤 Dankmar Scholz
- 👤 Walter Nicolaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:41
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/06; C08J; C08J5/00; C08J5/24; C08J5/241; C08J5/244; C08J5/249; B; B29; B29C; B29C35/00; B29C35/02; B29C35/04; B29C35/045; B29C2035/046; B29C35/08; B29C35/0805; B29C2035/0822; B29C2035/0827; C08J2367/00; C08J2367/06; Y; Y10; Y10S; Y10S428/00; Y10S428/913
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
84 words
A process for the production of moldings from unsaturated polyester resins; wherein a storage-stable, non-tacky semi-finished product is first produced, which can thereafter be shaped by any desired method, and finally be cured to give moldings which exhibit no delamination and no white fracture; which comprises the following steps: (A) preparing a molding mixture of 1. an unsaturated polyester, 2. a copolymerizable vinyl compound, 3. from 0.005 to 0.5% by weight of an inhibitor, 4. from 0.01 to 1% by weight of a photoinitiator,
Claim 2
Dependent Claim
84 words
A process for the production of moldings from unsaturated polyester resins; wherein a storage-stable, non-tacky semi-finished product is first produced, which can thereafter be shaped by any desired method, and finally be cured to give moldings which exhibit no delamination and no white fracture; which comprises the following steps: (A) preparing a molding mixture of 1. an unsaturated polyester, 2. a copolymerizable vinyl compound, 3. from 0.005 to 0.5% by weight of an inhibitor, 4. from 0.01 to 1% by weight of a photoinitiator,
Claim 3
Dependent Claim
97 words
from 0.2 to 5% by weight of an oxide or hydroxide of lithium, magnesium or calcium, or of a metal alcoholate, which compounds act as thickeners, 6. from 1 to 50% by weight of an aluminum oxide hydrate pulverulent filler which transmits ultraviolet light and/or 7. from 5 to 60% by weight of a fibrous reinforcing material, with or without 8. other conventional additives, the percentage being based on the total mixture, (B) thickening the mixture to give a non-tacky, storage stable semi-finished product, (C) shaping the latter, and (D) curing it by irradiation with ultraviolet light.
Claim 4
Dependent Claim
97 words
from 0.2 to 5% by weight of an oxide or hydroxide of lithium, magnesium or calcium, or of a metal alcoholate, which compounds act as thickeners, 6. from 1 to 50% by weight of an aluminum oxide hydrate pulverulent filler which transmits ultraviolet light and/or 7. from 5 to 60% by weight of a fibrous reinforcing material, with or without 8. other conventional additives, the percentage being based on the total mixture, (B) thickening the mixture to give a non-tacky, storage stable semi-finished product, (C) shaping the latter, and (D) curing it by irradiation with ultraviolet light.
Claim 5
Dependent Claim
65 words
A process for the production of moldings as claimed in claim 1, wherein, during curing, a zone of the semi-finished product is masked with a film which is opaque to ultraviolet light, thereafter an additional shaping operation is carried out in the masked, non-cured zone, or additional unsaturated polyester material is bonded to this zone, and after rmoving the opaque film the zone is cured.
Claim 6
Dependent Claim
45 words
A process for the production of moldings as recited in claim 1, wherein the mixture of step (A) comprises both from 1 to 50% by weight of an aluminum oxide hydrate pulverulent filler and from 5 to 60% by weight of a fibrous reinforcing material.
Claim 7
Dependent Claim
35 words
A process for the production of moldings as recited in claim 1, wherein the mixture of step (A) comprises 5 to 60% by weight of a fibrous reinforcing material, but no aluminum oxide hydrate filler.
Claim 8
Dependent Claim
37 words
A process for the production of moldings as recited in claim 1, wherein the mixture of step (A) comprises from 1 to 50% by weight of an aluminum oxide hydrate pulverulent filler, but no fibrous reinforcing material.
Claim 9
Dependent Claim
22 words
A process for the production of moldings as recited in claim 1, wherein the molding mixture is applied to a sheet-like carrier.
Claim 10
Dependent Claim
23 words
A process for the production of moldings as recited in claim 1, wherein a subsequent heat-treatment is carried out after ultraviolet light curing.
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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) | 1987-01-09 | 1987-07-11 | 1988-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-09 | 1991-07-11 | 1992-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-09 | 1995-07-11 | 1996-01-10 | $7700.00 | Window Closed / Lapsed |