US4067843A
Expired / Lapsed
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Granular phenolic urethane molding compounds
Assignee: Occidental Chemical Corp
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Filing: 1976-06-07
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Granted: 1978-01-10
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Expires: 1996-06-07
Abstract
Abstract Reactive mixtures comprising a polydienediol, an hydroxyalkylated novolac, and a polyisocyanate may be mixed with an inert filler composition to form granular molding compounds suitable for the preparation of molded articles having advantageous mechanical and electrical properties.
Inventors
- 👤 Myron C. Annis
- 👤 Donald W. Hoch
- 👤 Herman J. Harrington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:53
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/69; C08G18/698; C08G18/40; C08G18/54; C08G18/546
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
15 words
A thermosetting, reactive granular molding compound consisting essentially of a mixture of: A. a polydienediol;
Claim 2
Dependent Claim
15 words
A thermosetting, reactive granular molding compound consisting essentially of a mixture of: A. a polydienediol;
Claim 3
Dependent Claim
85 words
B. An organic polyisocyanate; C. an hydroxyalkylated novolac of the formula: ##STR2## wherein n has an average value of about 0.2 to 6; x, y and z are integers from 1 to 25; R 1 is independently selected from the group consisting of hydrogen, fluorine, chlorine, bromine, and a hydrocarbon radical; R 2 and R 3 are independently selected from the group consisting of hydrogen, a hydrocarbon radical, and a halogen substitued hydrocarbon radical; and R 4 is a hydrocarbon radical; and D. inert fillers.
Claim 4
Dependent Claim
85 words
B. An organic polyisocyanate; C. an hydroxyalkylated novolac of the formula: ##STR2## wherein n has an average value of about 0.2 to 6; x, y and z are integers from 1 to 25; R 1 is independently selected from the group consisting of hydrogen, fluorine, chlorine, bromine, and a hydrocarbon radical; R 2 and R 3 are independently selected from the group consisting of hydrogen, a hydrocarbon radical, and a halogen substitued hydrocarbon radical; and R 4 is a hydrocarbon radical; and D. inert fillers.
Claim 5
Dependent Claim
32 words
A molding compound according to claim 1 wherein the polydienediol is an hydroxyl-terminated polydiene having at least about 60 percent of the olefinic unsaturation present in the form of 1,2-type of unsaturation.
Claim 6
Dependent Claim
13 words
A molding compound according to claim 2 wherein the polyisocyanate is a diisocyanate.
Claim 7
Dependent Claim
14 words
A molding compound according to claim 3 wherein the polydienediol is an hydroxyl-terminated polybutadiene.
Claim 8
Dependent Claim
48 words
A molding compound according to claim 4 wherein the proportion by weight of hydroxyl-terminated polydiene: hydroxyalkylated novolac is about 0.1:1 to about 10:1 and the organic diisocyanate is present in an amount sufficient to provide a ratio of NCO:OH in the range of about 0.8:1 to about 1.2:1.
Claim 9
Dependent Claim
26 words
A molding compound according to claim 4 wherein the weight proportion of hydroxyl-terminated polydiene: hydroxyalkylated novolac is in the range of about 1:1 to about 1.5:1.
Claim 10
Dependent Claim
63 words
A molding compound according to claim 6 wherein the hydroxyalkylated novolac is characterized by the formula: ##STR3##wherein: n has an average value of about 0.5 to about 3; x, y, and z are integers of from about 1 to about 10; R 1 , r 2 , and R 3 are hydrogen; and R 4 is ethylene or propylene or a mixture thereof.
Claim 11
Dependent Claim
21 words
A molding compound according to claim 7 consisting essentially of about 30 to about 70 weight percent of inert mineral fillers.
Claim 12
Dependent Claim
15 words
A molding compound according to claim 8 wherein the organic polyisocyanate is methylenebis (phenyl isocyanate).
Claim 13
Dependent Claim
28 words
A molding compound according to claim 9 wherein the inert mineral fillers are selected from the group consisting of magnesium oxide, alumina hydrate, silicon dioxide and mixtures thereof.
Claim 14
Dependent Claim
15 words
A molding compound according to claim 10 wherein a glass fiber reinforcing agent is present.
Claim 15
Dependent Claim
23 words
A molded article prepared by reacting and molding the granular molding compound of claim 1 in the presence of a free radical catalyst.
Claim 16
Dependent Claim
90 words
A thermosetting reactive mixture consisting essentially of A. a polydienediol; B. an organic polyisocyanate; C. an hydroxyalkylated novolac of the formula: ##STR4##wherein n has an average value of about 0.2 to 6; x, y and z are integers from 1 to 25; R 1 is independently selected from the group consisting of hydrogen, fluorine, chlorine, bromine, and a hydrocarbon radical; R 2 and R 3 are independently selected from the group consisting of hydrogen, a hydrocarbon radical, and a halogen substituted hydrocarbon radical; and R 4 is a hydrocarbon radical.
Claim 17
Dependent Claim
90 words
A thermosetting reactive mixture consisting essentially of A. a polydienediol; B. an organic polyisocyanate; C. an hydroxyalkylated novolac of the formula: ##STR4##wherein n has an average value of about 0.2 to 6; x, y and z are integers from 1 to 25; R 1 is independently selected from the group consisting of hydrogen, fluorine, chlorine, bromine, and a hydrocarbon radical; R 2 and R 3 are independently selected from the group consisting of hydrogen, a hydrocarbon radical, and a halogen substituted hydrocarbon radical; and R 4 is a hydrocarbon radical.
Claim 18
Dependent Claim
19 words
A polymeric product obtained by reacting the mixture of claim 13 in the presence of a free radical 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) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |