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US4400340A
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Method for making a dicyclopentadiene thermoset polymer
Assignee: Metton America Inc
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Filing: 1982-01-25
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Granted: 1983-08-23
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Expires: 2002-01-25
Abstract
Abstract A method of making a thermoset polydicyclopentadiene by first combining a plurality of reactant streams, one containing the activator of a metathesis-catalyst system, a second containing the catalyst of a metathesis-catalyst system and at least one containing dicyclopentadiene; then immediately injecting this combination into a mold where polymerization results in the formation of a tough, rigid thermoset polymer with high modulus and excellent impact strength.
Inventors
- 👤 Daniel W. Klosiewicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:18
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
66 words
A method of making a thermoset homopolymer comprising: first, combining a plurality of reactant streams, one of which contains the activator of a metathesis-catalyst system combined with a moderator, and a second which contains the catalyst of said metathesis-catalyst system and at least one of which contains dicyclopentadiene to form a reaction mixture and then, immediately injecting the reaction mixture into a mold where polymerization occurs.
Claim 2
Independent Claim
66 words
A method of making a thermoset homopolymer comprising: first, combining a plurality of reactant streams, one of which contains the activator of a metathesis-catalyst system combined with a moderator, and a second which contains the catalyst of said metathesis-catalyst system and at least one of which contains dicyclopentadiene to form a reaction mixture and then, immediately injecting the reaction mixture into a mold where polymerization occurs.
Claim 3
Dependent Claim
15 words
The method in accordance with claim 1 where the catalyst is a tungsten containing compound.
Claim 4
Dependent Claim
25 words
A method in accordance with claim 2 wherein the tungsten containing compound is selected from the group consisting of tungsten hexachloride and tungsten oxy tetrachloride.
Claim 5
Dependent Claim
13 words
The method of claim 3 wherein the tungsten containing compound is tungsten hexachloride.
Claim 6
Dependent Claim
22 words
A method in accordance with claim 1 wherein the catalyst is mixed with dicyclopentadiene before the catalyst is mixed with the activator.
Claim 7
Dependent Claim
24 words
A method in accordance with claim 1 wherein the activator is an alkylaluminum halide, where the alkyl group contains one to ten carbon atoms.
Claim 8
Dependent Claim
24 words
A method in accordance with claim 6 wherein the activator is selected from the group consisting of diethyl aluminum chloride and ethyl aluminum dichloride.
Claim 9
Dependent Claim
14 words
A method in accordance with claim 7 wherein the activator is diethyl aluminum chloride.
Claim 10
Dependent Claim
29 words
A method in accordance with claim 1 wherein the moderator is selected from the group consisting of isopropyl ether, di-n-butyl ether, ethyl benzoate, phenyl ethyl acetate and diisopropyl ketone.
Claim 11
Dependent Claim
22 words
A method in accordance with claim 1 wherein the moderator is selected from the group consisting of ethyl benzoate and di-n-butyl ether.
Claim 12
Dependent Claim
24 words
A method in accordance with claim 1 wherein the activator to moderator ratio is from about 1:1.5 to about 1:5 on a molar basis.
Claim 13
Dependent Claim
20 words
The method of claim 1 wherein the activator is mixed with dicyclopentadiene before the activator is mixed with the catalyst.
Claim 14
Dependent Claim
27 words
A method in accordance with claim 1 wherein the reaction mixture has a dicyclopentadiene to catalyst ratio of about 1000:1 to about 15,000:1 on a molar basis.
Claim 15
Dependent Claim
24 words
A method in accordance with claim 1 wherein the reaction mixture has a dicylcopentadiene to catalyst ratio of about 2000:1 on a molar basis.
Claim 16
Dependent Claim
27 words
A method in accordance with claim 1 wherein the reaction mixture has a dicyclopentadiene to activator ratio of about 100:1 to about 2000:1 on a molar basis.
Claim 17
Dependent Claim
27 words
A method in accordance with claim 1 wherein the reaction mixture has a dicyclopentadiene to activator ratio from about 200:1 to about 500:1 on a molar basis.
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) | 1986-08-22 | 1987-02-21 | 1987-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-22 | 1991-02-21 | 1991-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-22 | 1995-02-21 | 1995-08-23 | $7700.00 | Window Closed / Lapsed |