US6093777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dendritic polyester macromolecule in thermosetting resin matrix
Assignee: Perstorp AB
•
Filing: 1997-11-03
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Granted: 2000-07-25
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Expires: 2017-11-03
Abstract
Abstract A partially or fully cured thermosetting product which includes a cured and molded product of a thermosetting composition. The composition includes 70% to 99% by weight of at least one thermosetting resin or compound and 1% to 30% by weight of at least one toughening agent. The toughening agent is at least one hyperbranched dendritic macromolecule formed of ester units, optionally in combination with ether units.
Inventors
- 👤 Kent Sorensen
- 👤 Bo Pettersson
- 👤 Louis Boogh
- 👤 Jan-Anders Edvin Manson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:01
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/06; B; B44; B44C; B44C5/00; B44C5/04; B44C5/0469; C08L101/00; C08L101/005; Y; Y10; Y10S; Y10S977/00; Y10S977/70; Y10S977/754
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
155 words
A thermoset product comprising a molded and cured or partially cured thermosetting composition, said thermosetting composition comprising a thermosetting resin matrix which includes a thermosetting resin and a toughening agent, said toughening agent comprising a hyperbranched dendritic macromolecule having at least one reactive group, said macromolecule built up of ester units, optionally, in combination with ether units which is derived from a monomeric or polymeric nucleus having at least one epoxide, hydroxyl, carboxyl or anhydride group, or a mixture thereof; from 1 to 20 generations of at least one monomeric or polymeric branching chain extender bonded to said nucleus, and containing at least three reactive groups wherein at least one is a hydroxyl group and at least one is a carboxyl or anhydride group; and, optionally, at least one generation of at least one spacing extender and/or chain stopper; wherein said weight ratio of thermosetting resin matrix to toughening agent is from 99:1 to 70:30.
Claim 2
Dependent Claim
155 words
A thermoset product comprising a molded and cured or partially cured thermosetting composition, said thermosetting composition comprising a thermosetting resin matrix which includes a thermosetting resin and a toughening agent, said toughening agent comprising a hyperbranched dendritic macromolecule having at least one reactive group, said macromolecule built up of ester units, optionally, in combination with ether units which is derived from a monomeric or polymeric nucleus having at least one epoxide, hydroxyl, carboxyl or anhydride group, or a mixture thereof; from 1 to 20 generations of at least one monomeric or polymeric branching chain extender bonded to said nucleus, and containing at least three reactive groups wherein at least one is a hydroxyl group and at least one is a carboxyl or anhydride group; and, optionally, at least one generation of at least one spacing extender and/or chain stopper; wherein said weight ratio of thermosetting resin matrix to toughening agent is from 99:1 to 70:30.
Claim 3
Dependent Claim
28 words
A thermoset product in accordance with claim 1 wherein said weight ratio of thermosetting resin matrix to toughening agent is in the range of from 90:10 and 80:20.
Claim 4
Dependent Claim
17 words
A thermoset product in accordance with claim 1 wherein said thermosetting resin matrix includes a reinforcing material.
Claim 5
Dependent Claim
28 words
A thermoset product in accordance with claim 3 wherein said reinforcing material is selected from the group consisting of glass fibers, carbon fibers, graphite fibers and cellulose fibers.
Claim 6
Dependent Claim
45 words
A thermoset product in accordance with claim 1 wherein said thermosetting resin matrix includes an agent selected from the group consisting of a curing agent, a catalyst, an inhibitor, a stabilizer, a lubricant, a mold release agent, a filler and a pigment and mixtures thereof.
Claim 7
Dependent Claim
54 words
A thermoset product in accordance with claim 1 wherein said thermosetting resin is selected from the group consisting of an epoxy resin, a saturated polyester, an unsaturated polyester, a urethane resin, a polyimide resin, a polyetherimide, a bismaleimide, an amino resin, a silicone resin, a phenolic resin, a furan resin and an allyl resin.
Claim 8
Dependent Claim
15 words
A thermoset product in accordance with claim 6 wherein said phenolic resin is phenol formaldehyde.
Claim 9
Dependent Claim
17 words
A thermoset product in accordance with claim 6 wherein epoxy resin is a rubber modified epoxy resin.
Claim 10
Dependent Claim
18 words
A thermoset product in accordance with claim 6 wherein said unsaturated polyester resin is a vinyl ester resin.
Claim 11
Dependent Claim
30 words
A thermoset product in accordance with claim 6 wherein said reactive group of said toughening agent is selected from the group consisting of epoxide, hydroxyl, carboxyl, anhydride, amino and alkenyl.
Claim 12
Dependent Claim
45 words
A thermoset product in accordance with claim 1 wherein said molding of said thermosetting resin matrix and said toughening agent occurs by means of press molding, pour molding, injection molding, rotational molding, blow molding, vacuum molding, extrusion molding, die casting, die forming or filament winding.
Claim 13
Dependent Claim
28 words
A thermoset product in accordance with claim 1 wherein said curing or partial curing occurs at a temperature in the range of between 0° C. and 400° C.
Claim 14
Dependent Claim
28 words
A thermoset product in accordance with claim 12 wherein said curing or partial curing occurs at a temperature in the range of between 10° C. and 150° C.
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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) | 2003-07-25 | 2004-01-24 | 2004-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-07-25 | 2008-01-24 | 2008-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-07-25 | 2012-01-24 | 2012-07-25 | $7700.00 | Window Closed / Lapsed |