US4339377A
Expired / Lapsed
US
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Method of polymerizing rosin
Assignee: Union Camp Corp
•
Filing: 1981-09-08
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Granted: 1982-07-13
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Expires: 2001-09-08
Abstract
Abstract Compounds of the formula: ##STR1## wherein X 1 , X 2 and X 3 are each selected from the group consisting of hydrogen and halogen are disclosed as catalysts for polymerizing rosin.
Inventors
- 👤 Samuel D. Hollis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:09
CPC Classifications
C; C09; C09F; C09F1/00; C09F1/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
61 words
The method of polymerizing a rosin which comprises heating said resin in the presence of a catalytic proportion of a compound selected from those of the formula: ##STR3## wherein X 1 , X 2 and X 3 are each selected from the group consisting of hydrogen and halogen, and at a temperature of from about 60° C. to about 180° C.
Claim 2
Independent Claim
61 words
The method of polymerizing a rosin which comprises heating said resin in the presence of a catalytic proportion of a compound selected from those of the formula: ##STR3## wherein X 1 , X 2 and X 3 are each selected from the group consisting of hydrogen and halogen, and at a temperature of from about 60° C. to about 180° C.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein the rosin is selected from the group consisting of tall oil rosin, wood rosin and gum rosin.
Claim 4
Dependent Claim
12 words
The method of claim 2 wherein the rosin is tall oil rosin.
Claim 5
Dependent Claim
11 words
The method of claim 2 wherein the rosin is wood rosin.
Claim 6
Dependent Claim
11 words
The method of claim 2 wherein the rosin is gum rosin.
Claim 7
Dependent Claim
22 words
The method of claim 1 wherein the catalytic proportion is from about 0.01 to about 10 percent by weight of the rosin.
Claim 8
Dependent Claim
15 words
The method of claim 6 wherein the proportion is from about 0.3 to 1 percent.
Claim 9
Dependent Claim
11 words
The method of claim 1 wherein said compound is methanesulfonic acid.
Claim 10
Dependent Claim
11 words
The method of claim 1 wherein said compound is trichloromethanesulfonic acid.
Claim 11
Dependent Claim
11 words
The method of claim 1 wherein the compound is trifluoromethanesulfonic acid.
Claim 12
Dependent Claim
15 words
The method of claim 1 wherein the polymerization is carried out in an inert solvent.
Claim 13
Dependent Claim
12 words
The method of claim 1 carried out in a cyclic terpene solvent.
Claim 14
Independent Claim
36 words
A method for decreasing the crystallizing tendency of tall oil rosin, comprising the polymerization of said rosin in the presence of methanesulfonic acid or its halogenated derivatives, in the temperature range of 80° to 190° C.
Claim 15
Independent Claim
36 words
A method for decreasing the crystallizing tendency of tall oil rosin, comprising the polymerization of said rosin in the presence of methanesulfonic acid or its halogenated derivatives, in the temperature range of 80° to 190° C.
References Cited (Backward Citations)
US1980367A
Cited
US2327165A
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US2419185A
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US3842019A
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US3984357A
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US3891612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-12 | 1986-01-11 | 1986-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-12 | 1990-01-11 | 1990-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-12 | 1994-01-11 | 1994-07-13 | $7700.00 | Window Closed / Lapsed |