Patent US4387171A successfully refreshed from Google Patents.
US4387171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsaturated polyester resins
Assignee: SCOTT BAKER Co Ltd
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Filing: 1981-08-21
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Granted: 1983-06-07
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Expires: 2001-08-21
Abstract
Abstract An unsaturated halogenated or non-halogenated polyester resin composition for open lay-up moulding and containing styrene as an agent for cross-linking during curing additionally contains 0.1 to 5% by weight, based on the total weight of the composition, of at least one C 18-40 α-olefine compound which is theoretically capable of taking part in the cross-linking reaction. When the composition contains a non-halogenated polyester resin, then the α-olefine compound itself serves to restrict styrene evaporation from the composition. For halogenated polyester resin compositions, the α-olefine, although not usually by itself providing such a marked restriction of styrene evaporation, does allow incorporation into the composition of a waxy compound in an amount sufficiently large to achieve the desired styrene evaporation restriction without deterioration of the adhesion properties of the composition during lay-up.
Inventors
- 👤 Robert F. Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:42
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/04; C08F299/0478; C08L; C08L67/00; C08L67/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
59 words
An unsaturated polyester resin composition for ambient temperature open lay-up moulding which contains an unsaturated polyester resin selected from halogenated and non-halogenated said resins, styrene as an agent for cross-linking during curing and a small quantity of at least one compound which is theoretically capable of taking part in the cross-linking reaction, which compound is a C 18-14 α-olefine.
Claim 2
Dependent Claim
59 words
An unsaturated polyester resin composition for ambient temperature open lay-up moulding which contains an unsaturated polyester resin selected from halogenated and non-halogenated said resins, styrene as an agent for cross-linking during curing and a small quantity of at least one compound which is theoretically capable of taking part in the cross-linking reaction, which compound is a C 18-14 α-olefine.
Claim 3
Dependent Claim
44 words
A polyester resin composition according to claim 1, wherein when the resin is a non-halogenated resin the amount of the said terminally unsaturated α-olefine(s) present in the composition is from 0.1 to 1% inclusive by weight based on the total weight of the composition.
Claim 4
Dependent Claim
18 words
A polyester resin composition according to claim 2, wherein the said amount is from 0.3 to 0.6% inclusive.
Claim 5
Dependent Claim
17 words
A polyester resin composition according to claim 1, wherein the α-olefine contains from 18-24 -carbon atoms inclusive.
Claim 6
Dependent Claim
25 words
A polyester resin composition according to claim 1, which contains a plurality of terminally unsaturated α-olefines each containing from 18 to 40 carbon atoms inclusive.
Claim 7
Dependent Claim
41 words
A polyester resin composition according to claim 5, wherein the said plurality of terminally unsaturated α-olefines is provided by a commercially available mixture of said α-olefines with a carbon atom content lying in the range 21 to 28 carbon atoms inclusive.
Claim 8
Dependent Claim
26 words
A polyester resin composition according to claim 1, wherein the polyester resin is a non-halogenated said polyester resin and the composition is free of waxy compound.
Claim 9
Dependent Claim
26 words
A polyester resin composition according to claim 1, wherein the polyester resin is a holgenated said polyester resin and the composition additionally contains a waxy compound.
Claim 10
Dependent Claim
32 words
A polyester resin composition according to claim 8, wherein the amount of said waxy compound present in the composition is from 0.05 to 0.3% based on the weight of the total composition.
Claim 11
Dependent Claim
27 words
A polyester resin composition according to claim 1, wherein the unsaturated polyester resin is a halogenated said resin and the composition is free of said waxy compound.
Claim 12
Dependent Claim
119 words
In an unsaturated polyester resin composition for ambient temperature open lay-up moulding in which the unsaturated polyester resin is selected from non-halogenated and halogenated said resins and in which composition styrene is present as an agent for cross-linking during curing, the improvement comprising the presence of a small quantity of at least one C 18-40 α-olefine compound which is theoretically capable of taking part in the cross-linking reaction so as to serve, in a composition containing a said non-halogenated polyester resin, to restrict styrene evaporation from the said composition and, in a said composition containing a said halogenated polyester resin, to allow a waxy compound to be additionally present in an amount which restricts styrene evaporation from said composition.
Claim 13
Dependent Claim
119 words
In an unsaturated polyester resin composition for ambient temperature open lay-up moulding in which the unsaturated polyester resin is selected from non-halogenated and halogenated said resins and in which composition styrene is present as an agent for cross-linking during curing, the improvement comprising the presence of a small quantity of at least one C 18-40 α-olefine compound which is theoretically capable of taking part in the cross-linking reaction so as to serve, in a composition containing a said non-halogenated polyester resin, to restrict styrene evaporation from the said composition and, in a said composition containing a said halogenated polyester resin, to allow a waxy compound to be additionally present in an amount which restricts styrene evaporation from said composition.
Claim 14
Dependent Claim
20 words
A polyester resin composition according to claim 8, wherein the waxy compound is selected from stearyl stearate and paraffin wax.
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) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |