US4458037A
Expired / Lapsed
US
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Method of making cellular crosslinked poly(dicyclopentadiene)
Assignee: Hercules LLC
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Filing: 1983-11-17
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Granted: 1984-07-03
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Expires: 2003-11-17
Abstract
Abstract Disclosed is an improved method of making a cellular crosslinked polymer with a metathesis-catalyst system where a metathesis-catalyst is activated with an alkylaluminum iodide compound. In a preferred embodiment, two parts of the metathesis-catalyst system form the basis for two solutions, a catalyst/monomer solution and an alkylaluminum iodide activator/monomer solution. At least one solution also contains a blowing agent. The solutions are combined in one place, such as the mixing head of a reaction injection molding machine, and then injected into another place, such as a mold, where the monomer reacts to form a cellular crosslinked polymer.
Inventors
- 👤 Douglas R. Leach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:20
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08; C08J2345/00
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
95 words
A method for making a cellular crosslinked thermoset polymer of polymerized units of dicyclopentadiene comprising: first, combining a plurality of reactant streams, one reactant stream containing an alkylaluminum iodide activator of a metathesis-catalyst system, a second reactant stream containing a catalyst of said metathesis-catalyst system, at least one reactant stream containing dicyclopentadiene and at least one reactant stream containing a blowing agent to form a reaction mixture; then heating at a temperature of about 30° C., to about 80° C. for a time sufficient for polymerization to take place and recovering the cellular crosslinked polymer.
Claim 2
Independent Claim
95 words
A method for making a cellular crosslinked thermoset polymer of polymerized units of dicyclopentadiene comprising: first, combining a plurality of reactant streams, one reactant stream containing an alkylaluminum iodide activator of a metathesis-catalyst system, a second reactant stream containing a catalyst of said metathesis-catalyst system, at least one reactant stream containing dicyclopentadiene and at least one reactant stream containing a blowing agent to form a reaction mixture; then heating at a temperature of about 30° C., to about 80° C. for a time sufficient for polymerization to take place and recovering the cellular crosslinked polymer.
Claim 3
Dependent Claim
15 words
A method in accordance with claim 1 wherein the alkylaluminum iodide activator is diethylaluminum iodide.
Claim 4
Dependent Claim
36 words
A method in accordance with claim 1 which further comprises at least one reactant stream containing an elastomer present in amount from about 3 to about 15 weight percent based on the weight of the dicyclopentadiene.
Claim 5
Dependent Claim
15 words
A method in accordance with claim 3 wherein the alkylaluminum iodide activator is diethylaluminum iodide.
Claim 6
Dependent Claim
19 words
A method in accordance with claim 1 wherein the catalyst of said metathesis-catalyst system is a tungsten containing catalyst.
Claim 7
Dependent Claim
19 words
A method in accordance with claim 2 wherein the catalyst of said metathesis-catalyst system is a tungsten containing catalyst.
Claim 8
Dependent Claim
19 words
A method in accordance with claim 4 wherein the catalyst of said metathesis-catalyst system is a tungsten containing catalyst.
Claim 9
Independent Claim
127 words
A method for making a cellular crosslinked thermoset polymer of polymerized units of dicyclopentadiene comprising: first, combining a plurality of reactant streams, one reactant stream containing an alkylaluminum iodide activator of a metathesis-catalyst system, a second reactant stream containing a catalyst of said metathesis-catalyst system, at least one reactant stream containing dicyclopentadiene, at least one reaction stream containing up to about 20 percent, based on the weight of dicyclopentadiene of a cycloolefin selected from the group consisting of norbornene, norbornadiene, cyclopentene, dimethanehexahydronaphthalene, and dimethaneoctahydronaphthalene, and at least one reactant stream containing a blowing agent to form a reaction mixture; then heating at a temperature of about 30° C., to about 80° C. for a time sufficient for polymerization to take place and recovering the cellular crosslinked polymer.
Claim 10
Independent Claim
127 words
A method for making a cellular crosslinked thermoset polymer of polymerized units of dicyclopentadiene comprising: first, combining a plurality of reactant streams, one reactant stream containing an alkylaluminum iodide activator of a metathesis-catalyst system, a second reactant stream containing a catalyst of said metathesis-catalyst system, at least one reactant stream containing dicyclopentadiene, at least one reaction stream containing up to about 20 percent, based on the weight of dicyclopentadiene of a cycloolefin selected from the group consisting of norbornene, norbornadiene, cyclopentene, dimethanehexahydronaphthalene, and dimethaneoctahydronaphthalene, and at least one reactant stream containing a blowing agent to form a reaction mixture; then heating at a temperature of about 30° C., to about 80° C. for a time sufficient for polymerization to take place and recovering the cellular crosslinked polymer.
Claim 11
Dependent Claim
15 words
A method in accordance with claim 8 wherein the alkylaluminum iodide activator is diethylaluminum iodide.
Claim 12
Dependent Claim
36 words
A method in accordance with claim 8 which further comprises at least one reactant stream containing an elastomer present in amount from about 3 to about 15 weight percent based on the weight of the dicyclopentadiene.
Claim 13
Dependent Claim
15 words
A method in accordance with claim 10 wherein the alkylaluminum iodide activator is diethylaluminum iodide.
Claim 14
Dependent Claim
19 words
A method in accordance with claim 8 wherein the catalyst of said metathesis-catalyst system is a tungsten containing catalyst.
Claim 15
Dependent Claim
19 words
A method in accordance with claim 9 wherein the catalyst of said metathesis-catalyst system is a tungsten containing catalyst.
Claim 16
Dependent Claim
19 words
A method in accordance with claim 11 wherein the catalyst of said metathesis-catalyst system is a tungsten containing catalyst.
Claim 17
Independent Claim
125 words
A method for making a cellular crosslinked thermoset polymer of polymerized units of dicyclopentadiene comprising: first, combining a plurality of reactant streams, one reactant stream containing an alkylaluminum iodide activator of a metathesis-catalyst system, a second reactant stream containing a catalyst of said metathesis-catalyst system, at least one reactant stream containing dicyclopentadiene, at least on reaction stream containing up to about 20 percent, based on the weight of dicyclopentadiene of a cycloolefin where the cycloolefin contains from five to twelve carbon atoms, and at least one reactant stream containing a blowing agent to form a reaction mixture; then heating at a temperature of about 30° C., to about 80° C. for a time sufficient for polymerization to take place and recovering the cellular crosslinked polymer.
Claim 18
Independent Claim
125 words
A method for making a cellular crosslinked thermoset polymer of polymerized units of dicyclopentadiene comprising: first, combining a plurality of reactant streams, one reactant stream containing an alkylaluminum iodide activator of a metathesis-catalyst system, a second reactant stream containing a catalyst of said metathesis-catalyst system, at least one reactant stream containing dicyclopentadiene, at least on reaction stream containing up to about 20 percent, based on the weight of dicyclopentadiene of a cycloolefin where the cycloolefin contains from five to twelve carbon atoms, and at least one reactant stream containing a blowing agent to form a reaction mixture; then heating at a temperature of about 30° C., to about 80° C. for a time sufficient for polymerization to take place and recovering the cellular crosslinked polymer.
Claim 19
Dependent Claim
15 words
A method in accordance with claim 15 wherein the alkylaluminum iodide activator is diethylaluminum iodide.
Claim 20
Dependent Claim
36 words
A method in accordance with claim 15 which further comprises at least one reactant stream containing an elastomer present in amount from about 3 to about 15 weight percent based on the weight of the dicyclopentadiene.
Claim 21
Dependent Claim
15 words
A method in accordance with claim 17 wherein the alkylaluminum iodide activator is diethylaluminum iodide.
Claim 22
Dependent Claim
19 words
A method in accordance with claim 15 wherein the catalyst of said metathesis-catalyst system is a tungsten containing catalyst.
Claim 23
Dependent Claim
19 words
A method in accordance with claim 16 wherein the catalyst of said metathesis-catalyst system is a tungsten containing catalyst.
Claim 24
Dependent Claim
19 words
A method in accordance with claim 18 wherein the catalyst of said metathesis-catalyst system is a tungsten containing catalyst.
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) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |