Patent US4902560A successfully refreshed from Google Patents.
US4902560A
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Improving the physical properties of glass composite polydicyclopentadiene by heat treatment
Assignee: Hercules LLC
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Filing: 1988-06-01
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Granted: 1990-02-20
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Expires: 2008-06-01
Abstract
Abstract A method of preparing a glass fiber-reinforced, crosslinked polymer structure which comprises saturating an uncoated, unsized woven glass fabric with a polymerizable liquid comprised of dicyclopentadiene and, optionally, one or more other metathesis polymerizable strained ring polycyclic cycloolefins, subjecting said saturated fabric to polymerization conditions, and, thereafter, post-curing the resultant structure at a temperature greater than about 225° C., and a glass fiber-reinforced, crosslinked polymer prepared by that process, are disclosed. Post-curing at temperatures greater than 225° C. enhances the physical properties of the woven fiber-reinforced, crosslinked polymer.
Inventors
- 👤 Paul A. Silver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:31
CPC Classifications
B; B29; B29C; B29C70/00; C; C08; C08J; C08J5/00; C08J5/04; C08J5/0405; C08J5/043; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08; C08J2365/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24636; Y10T428/31504; Y10T428/31551; Y10T428/31645; Y10T442/00; Y10T442/20; Y10T442/2926; Y10T442/2992
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
45 words
A method of preparing a glass fiber-reinforced crosslinked, polymer comprising saturating an uncoated, unsized woven glass fabric with a polymerizable liquid comprised of dicyclopentadiene, subjecting said saturated fabric to polymerization conditions, and, thereafter, post-curing the resultant structure at a temperature greater than about 225° C.
Claim 2
Independent Claim
45 words
A method of preparing a glass fiber-reinforced crosslinked, polymer comprising saturating an uncoated, unsized woven glass fabric with a polymerizable liquid comprised of dicyclopentadiene, subjecting said saturated fabric to polymerization conditions, and, thereafter, post-curing the resultant structure at a temperature greater than about 225° C.
Claim 3
Dependent Claim
24 words
A method as claimed in claim 1 wherein the woven glass fabric comprises 30 to 70%, by weight, of the glass fiber-reinforced, crosslinked polymer.
Claim 4
Dependent Claim
19 words
A method as claimed in claim 2 wherein the polymer is a homopolymer of metathesis polymerized units of dicyclopentadiene.
Claim 5
Dependent Claim
34 words
A method as claimed in claim 2 wherein post-cure is carried out by heating the resultant structure at a temperature greater than about 225° C. for a period of greater than about 30 minutes.
Claim 6
Dependent Claim
29 words
A method as claimed in claim 2 wherein said polymerizable liquid comprises up to about 60% by weight of one or more strained ring polycyclic comonomers other than dicyclopentadiene.
Claim 7
Dependent Claim
34 words
A method as claimed in claim 5 wherein said strained ring polycyclic comonomers are selected from the group consisting of norbornene, norbornadiene, vinyl norbornene, ethylidene norbornene, phenylnorbornene, tetracyclododecene, methyltetracyclododecane, tetracyclododecadiene, methyltetracyclododecadiene, tricyclopentadiene and tetracyclopentadiene.
Claim 8
Dependent Claim
36 words
A method as claimed in claim 2 wherein said polymerizable liquid comprises premixed: (a) metathesis polymerizable units of dicyclopentadiene, (b) activator of a metathesis-catalyst system comprising an dialkylaluminum iodide, and (c) catalyst of a metathesis-catalyst system.
Claim 9
Dependent Claim
14 words
The process of claim 7 wherein the polymerizable liquid further comprises a rate moderator.
Claim 10
Dependent Claim
12 words
The process of claim 8 wherein the catalyst is a tungsten compound.
Claim 11
Dependent Claim
12 words
The process of claim 9 wherein the activator is a dialkylaluminum iodide.
Claim 12
Dependent Claim
41 words
A method as claimed in claim 2 wherein said polymerizable liquid is formed from two or more separate streams, one stream of which comprises activator of a metathesis-catalyst system and a second stream of which comprises catalyst of a metathesis-catalyst system.
Claim 13
Dependent Claim
12 words
The process of claim 11 wherein the catalyst is a tungsten compound.
Claim 14
Dependent Claim
14 words
The process of claim 11 wherein the polymerizable liquid further comprises a rate moderator.
Claim 15
Dependent Claim
12 words
The process of claim 13 wherein the catalyst is a tungsten compound.
Claim 16
Dependent Claim
12 words
The process of claim 14 wherein the activator is a dialkylaluminum iodide.
Claim 17
Dependent Claim
19 words
A method as claimed in claim 12 wherein the polymer is a homopolymer of metathesis polymerized units of dicyclopentadiene.
Claim 18
Dependent Claim
25 words
A method as claimed in claim 4 wherein post-curing is carried out at the resultant structure at a temperature between 225° C. and 350° C.
Claim 19
Dependent Claim
28 words
A glass fiber-reinforced, crosslinked polymer of metathesis polymerized units of dicyclopentadiene and uncoated, unsized woven glass fabric, which has been post-cured at a temperature greater than 225° C.
Claim 20
Dependent Claim
28 words
A glass fiber-reinforced, crosslinked polymer of metathesis polymerized units of dicyclopentadiene and uncoated, unsized woven glass fabric, which has been post-cured at a temperature greater than 225° C.
Claim 21
Dependent Claim
36 words
A glass fiber-reinforced, crosslinked polymer as claimed in claim 18 wherein the woven glass fabric comprises 30 to 70%, by total weight of the glass fiber-reinforced, crosslinked polymer, and said polymer is a homopolymer of dicyclopentadiene.
Claim 22
Dependent Claim
66 words
A glass fiber-reinforced, crosslinked polymer as claimed in claim 8 wherein the woven glass fabric comprises 30 to 70%, by total weight of the glass fiber-reinforced, crosslinked polymer, and said polymer comprises up to about 60% by weight of one or more strained ring polycyclic comonomers selected from the group consisting of norbornene, norbornadiene, vinyl norbornene, ethylidene norbornene, phenylnorbornene, tetracyclododecene, methyltetracyclododecane, tetracyclododecadiene, methyltetracyclododecadiene, tricyclopentadiene and tetracyclopentadiene.
References Cited (Backward Citations)
US4400340A
Cited
US4708969A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-19 | 1993-08-21 | 1994-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-19 | 1997-08-21 | 1998-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-19 | 2001-08-21 | 2002-02-20 | $7700.00 | Window Closed / Lapsed |