US4078132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
"Process for preparing petroleum resins having low softening points and narrow molecular weight ranges"
Assignee: Individual
•
Filing: 1976-08-09
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Granted: 1978-03-07
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Expires: 1996-08-09
Abstract
Abstract Low softening point resins are prepared by a process which comprises polymerising using a Friedel Crafts catalyst: (1) a petroleum resin feed comprising C 5 olefins and C 5 diolefins or a mixture of C 5 and C 6 olefins and diolefins, said feed being obtained from the cracking of petroleum feedstock and being subjected to thermal soaking at a temperature of 100° C to 150° C, and (2) a branched chain reactive aliphatic olefin or an oxygenated transfer agent. Preferred additives are diisobutene or U.O.P. olefins. The polymerization may take place in the presence of a C 8 to C 10 unsaturated aromatic compound.
Inventors
- 👤 Andre Lepert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:11
CPC Classifications
C; C08; C08F; C08F240/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
130 words
A process for preparing a low softening point resin useful as a tackifying agent for natural and synthetic rubbers which comprises polymerising using a Friedel Crafts catalyst (1) a petroleum resin feed comprising C 5 olefins and C 5 diolefins or a mixture of C 5 and C 6 olefins and diolefins, said feed being obtained from the cracking of petroleum feedstock and being subjected to thermal soaking at a temperature of 100° C. to 150° C., and adding to said feed (2) a branched chain aliphatic monoolefin transfer agent, in an amount of 10-400 wt. %, or a phenol or ether transfer agent, in an amount of 0.1 to 5 wt. %, based on the weight of petroleum resin feed, to obtain a resin of narrowed molecular weight distribution.
Claim 2
Dependent Claim
130 words
A process for preparing a low softening point resin useful as a tackifying agent for natural and synthetic rubbers which comprises polymerising using a Friedel Crafts catalyst (1) a petroleum resin feed comprising C 5 olefins and C 5 diolefins or a mixture of C 5 and C 6 olefins and diolefins, said feed being obtained from the cracking of petroleum feedstock and being subjected to thermal soaking at a temperature of 100° C. to 150° C., and adding to said feed (2) a branched chain aliphatic monoolefin transfer agent, in an amount of 10-400 wt. %, or a phenol or ether transfer agent, in an amount of 0.1 to 5 wt. %, based on the weight of petroleum resin feed, to obtain a resin of narrowed molecular weight distribution.
Claim 3
Dependent Claim
18 words
A process according to claim 1 wherein the petroleum feedstock has been cracked in the presence of steam.
Claim 4
Dependent Claim
22 words
A process according to claim 1 wherein the petroleum feedstock has been cracked at a temperature of between 500° and 870° C.
Claim 5
Dependent Claim
24 words
A process according to claim 3 wherein after cracking the feedstock is subjected to fractionation to remove C 2 to C 4 light ends.
Claim 6
Dependent Claim
19 words
A process according to claim 1 wherein the thermal soaking occurs at a temperature of 120° to 140° C.
Claim 7
Dependent Claim
21 words
A process according to claim 5 wherein the feed after thermal soaking is subjected to distillation to remove cyclic conjugated diolefins.
Claim 8
Dependent Claim
34 words
A process according to claim 1 wherein the feed additive is UOP olefins having a chain length of 5 to 9 carbon atoms per molecule prepared by oligomerisation of propylene with an acidic catalyst.
Claim 9
Dependent Claim
12 words
A process according to claim 1 wherein the feed additive is diisobutene.
Claim 10
Dependent Claim
28 words
A process according to claim 1 wherein the phenol is a mono-, di- or tri- substituted phenol, the substituent being a C 1 to C 30 hydrocarbyl group.
Claim 11
Dependent Claim
29 words
A process according to claim 1 wherein the ether is a dialkyl ether or an alkaryl ether, the alkyl group being a C 1 to C 30 hydrocarbyl group.
Claim 12
Dependent Claim
21 words
A process according to claim 1 wherein the polymerization mixture also contains a C 8 to C 10 unsaturated aromatic compound.
Claim 13
Dependent Claim
21 words
A process according to claim 11 wherein said aromatic compound is styrene, α-methyl styrene, vinyl toluene, indene, methyl indene or chlorostyrene.
Claim 14
Dependent Claim
27 words
A process according to claim 11 wherein the amount of aromatic compound is 10 to 400% by weight based on the weight of the petroleum resin feed.
Claim 15
Dependent Claim
29 words
A process according to claim 1 wherein branched chain aliphatic mono-olefins are added in an amount of 20 wt.% or higher based on the weight of petroleum resin feed.
Claim 16
Dependent Claim
19 words
A process according to claim 1 wherein the feed additive is branched chain mono-olefins produced in fluid catalytic cracking.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |