US5004765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low profile molding system
Assignee: Union Carbide Chemicals and Plastics Technology LLC
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Filing: 1989-11-06
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Granted: 1991-04-02
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Expires: 2009-11-06
Abstract
Abstract A molding additive composition comprising a mixture of low profile additive and a surfactant additive containing a silicon-oxyalkylene copolymer flow control agent and surface modifying agent; and a molding composition comprising a polyester molding resin, a low profile additive, a silicon-oxyalkylene copolymer flow control agent and surface modifying agent and a crosslinking monomer. In another embodiment, the invention embraces a molding composition comprising a polyester molding resin, a crosslinking monomer, a low profile additive, a reinforcing fiber, and a silicon-oxyalkylene copolymer flow control agent and surface modifying agent.
Inventors
- 👤 Kenneth E. Atkins
- 👤 Robert R. Gentry
- 👤 Raymond C. Gandy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:44
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/06; C08L63/00; C08L63/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
115 words
A molding additive composition comprising: (a) about 25 to 70 weight percent of a thermosetting unsaturated polyester or a vinyl ester; (b) about 5 to about 25 weight percent of a low profile additive; (c) about 35 to 70 weight percent of a crosslinking monomer which is olefinically unsaturated and crosslinkable with said thermosetting polyester or said vinyl ester; and (d) about 1 to 5 weight percent of a silicon oxyalkylene copolymer flow control agent wherein the silicon oxyalkylene copolymer contains a functional group having olefinic unsaturation and is reactive with the thermosetting polyester or vinyl ester and wherein the silicon oxyalkylene copolymer has a molecular weight less than that of the low profile additive.
Claim 2
Dependent Claim
115 words
A molding additive composition comprising: (a) about 25 to 70 weight percent of a thermosetting unsaturated polyester or a vinyl ester; (b) about 5 to about 25 weight percent of a low profile additive; (c) about 35 to 70 weight percent of a crosslinking monomer which is olefinically unsaturated and crosslinkable with said thermosetting polyester or said vinyl ester; and (d) about 1 to 5 weight percent of a silicon oxyalkylene copolymer flow control agent wherein the silicon oxyalkylene copolymer contains a functional group having olefinic unsaturation and is reactive with the thermosetting polyester or vinyl ester and wherein the silicon oxyalkylene copolymer has a molecular weight less than that of the low profile additive.
Claim 3
Dependent Claim
26 words
The molding additive composition of claim 1 wherein said crosslinking monomer is selected from the group consisting of styrene, a styrene derivative, or a mixture thereof.
Claim 4
Dependent Claim
17 words
The molding additive composition of claim 1 wherein the crosslinking monomer is an acrylate or methacrylate derivative.
Claim 5
Dependent Claim
51 words
The molding additive composition of claim 1 wherein said silicon-oxyalkylene copolymer flow control agent contains (a) at least one silicon per molecule; (b) at least 2 alkylene oxide moieties in a sequence per molecule; (c) the alkylene oxide are bonded to silicon in the molecule through a carbon to silicon bond.
Claim 6
Dependent Claim
119 words
A fiber reinforced molding composition comprising (a) about 25 to 70 weight percent of a thermosetting unsaturated polyester or a vinyl ester; (b) about 5 to 25 weight percent of a low profile additive; (c) about 35 to 70 weight percent of a crosslinking monomer which is olefinically unsaturated and crosslinkable with said thermosetting polyester or said vinyl ester; (d) about 1 to 5 weight percent of a silicon oxyalkylene copolymer flow control agent wherein the silicon oxyalkylene copolymer contains a functional group having olefinic unsaturation and is reactive with the thermosetting polyester or vinyl ester and wherein the silicon oxyalkylene copolymer has a molecular weight less than that of the low profile additive; and (e) a reinforcing fiber.
Claim 7
Dependent Claim
119 words
A fiber reinforced molding composition comprising (a) about 25 to 70 weight percent of a thermosetting unsaturated polyester or a vinyl ester; (b) about 5 to 25 weight percent of a low profile additive; (c) about 35 to 70 weight percent of a crosslinking monomer which is olefinically unsaturated and crosslinkable with said thermosetting polyester or said vinyl ester; (d) about 1 to 5 weight percent of a silicon oxyalkylene copolymer flow control agent wherein the silicon oxyalkylene copolymer contains a functional group having olefinic unsaturation and is reactive with the thermosetting polyester or vinyl ester and wherein the silicon oxyalkylene copolymer has a molecular weight less than that of the low profile additive; and (e) a reinforcing fiber.
Claim 8
Dependent Claim
15 words
The fiber reinforced molding composition of claim 5 wherein the reinforcing fiber in glass fiber.
Claim 9
Dependent Claim
15 words
The fiber reinforced molding composition of claim 5 wherein the reinforcing fiber is carbon fiber.
Claim 10
Dependent Claim
18 words
The fiber reinforced molding composition of claim 7 wherein the carbon fiber is in the form of graphite.
Claim 11
Dependent Claim
15 words
The fiber reinforced molding composition of claim 6 wherein the glass fiber is staple fiber.
Claim 12
Dependent Claim
15 words
The fiber reinforced molding composition of claim 5 wherein the carbon fiber is staple fiber.
Claim 13
Dependent Claim
105 words
An improved low profile additive molding composition comprising (a) a thermosetting polyester resin, (b) from about 25 to 70 weight percent of a crosslinkable olefinically unsaturated monomer that is crosslinkable with the polyester resin, (c) from about 1 to 25 weight percent of a thermoplastic low profile additive for shrinkage control, and (d) from about 1 to 5 weight percent of a silicon-oxyalkylene copolymer flow control agent wherein the silicon oxyalkylene copolymer contains a functional group having olefinic unsaturation and is reactive with the thermosetting polyester resin and wherein the silicon oxyalkylene copolymer has a molecular weight less than that of the low profile additive.
Claim 14
Dependent Claim
105 words
An improved low profile additive molding composition comprising (a) a thermosetting polyester resin, (b) from about 25 to 70 weight percent of a crosslinkable olefinically unsaturated monomer that is crosslinkable with the polyester resin, (c) from about 1 to 25 weight percent of a thermoplastic low profile additive for shrinkage control, and (d) from about 1 to 5 weight percent of a silicon-oxyalkylene copolymer flow control agent wherein the silicon oxyalkylene copolymer contains a functional group having olefinic unsaturation and is reactive with the thermosetting polyester resin and wherein the silicon oxyalkylene copolymer has a molecular weight less than that of the low profile additive.
Claim 15
Dependent Claim
20 words
The improved low profile additive molding composition of claim 11 wherein the thermosetting polyester resin comprises a vinyl ester resin.
Claim 16
Dependent Claim
13 words
The molding additive composition of claim 1 containing a non-silicon containing polyoxyalkylene material.
Claim 17
Dependent Claim
82 words
An improved low profile additive molding composition according to claim 11 comprising: (a) from about 30 to 55 weight percent of the thermosetting unsaturated polyester or vinyl ester resin, (b) from 35 to 60 weight percent of the crosslinkable olefinically unsaturated monomer that is crosslinkable with the polyester resin, (c) from about 5 to 20 weight percent of the thermoplastic low profile additive for shrinkage control, and (d) from about 1 to 5 weight percent of the silicon-oxyalkylene copolymer flow control agent.
Claim 18
Dependent Claim
22 words
The molding composition of claim 14 wherein the silicon-oxyalkylene copolymer is present in an amount ranging from about 2 to 3 percent.
Claim 19
Dependent Claim
13 words
The molding composition of claim 14 wherein the low profile additive is poly(vinylacetate).
Claim 20
Dependent Claim
17 words
The molding composition of claim 14 wherein the olefinically unsaturated monomer is styrene or a styrene derivative.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1994-04-01 | 1994-10-01 | 1995-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-01 | 1998-10-01 | 1999-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-01 | 2002-10-01 | 2003-04-02 | $7700.00 | Window Closed / Lapsed |