US4173699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing petroleum resins for adhesive thermofusible compositions
Assignee: ATO Chimie SA
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Filing: 1978-03-10
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Granted: 1979-11-06
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Expires: 1998-03-10
Abstract
Abstract A process for manufacturing petroleum resins for adhesive thermofusible compositions, having a softening point comprised between 60° and 110° C., a molecular weight comprised between 700 and 1,500 and a Gardner color index less than 9, consisting in polymerizing a C 5 hydrocarbon distillation cut issuing from a steam cracking of naphtha or gas-oil and containing less than 5% isoprene and less than 1% cyclopentadiene, in the presence of a Friedel-Crafts catalyst.
Inventors
- 👤 Patrick Borg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:40
CPC Classifications
C; C08; C08F; C08F240/00; C09; C09J; C09J157/00; C09J157/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
162 words
A process for preparing petroleum resins for use in thermofusible adhesive compositions, which comprises the steps of polymerizing a C 5 hydrocarbon cut which contains less than 5% of isoprene and less than 1% of cyclopentadiene, in a hydrocarbon solvent having a boiling point in the range of between 20° and 150° C., in the presence of a Friedel-Crafts catalyst at a temperature in the range of between 20° and 150° C. whereby an organic reaction mixture comprising the polymerized resin is obtained, washing the organic reaction mixture with an alkaline or acid solution, then with water until neutralization at a temperature in the range of between 70° and 100° C. and submitting the washed organic reaction mixture to a distillation carried out by progressively raising the temperature to 250° C. in order to eliminate the hydrocarbon solvent, and to recover a product having a softening point of between 60° and 110° C., and a Gardner color index of less than 9.
Claim 2
Dependent Claim
162 words
A process for preparing petroleum resins for use in thermofusible adhesive compositions, which comprises the steps of polymerizing a C 5 hydrocarbon cut which contains less than 5% of isoprene and less than 1% of cyclopentadiene, in a hydrocarbon solvent having a boiling point in the range of between 20° and 150° C., in the presence of a Friedel-Crafts catalyst at a temperature in the range of between 20° and 150° C. whereby an organic reaction mixture comprising the polymerized resin is obtained, washing the organic reaction mixture with an alkaline or acid solution, then with water until neutralization at a temperature in the range of between 70° and 100° C. and submitting the washed organic reaction mixture to a distillation carried out by progressively raising the temperature to 250° C. in order to eliminate the hydrocarbon solvent, and to recover a product having a softening point of between 60° and 110° C., and a Gardner color index of less than 9.
Claim 3
Dependent Claim
34 words
A process according to claim 1, wherein the C 5 hydrocarbon cut is obtained by distillation between 10° and 50° C. of a hydrocarbon mixture issuing from a steam cracking of naphtha or gas-oil.
Claim 4
Dependent Claim
17 words
A process according to claim 1, wherein the C 5 hydrocarbon cut contains less than 3% isoprene.
Claim 5
Dependent Claim
17 words
A process according to claim 1, wherein the C 5 hydrocarbon cut contains less than 0.5% cyclopentadiene.
Claim 6
Dependent Claim
20 words
A process according to claim 1, wherein the catalyst is aluminium chloride used in the proportion of 0.1 to 5%.
Claim 7
Dependent Claim
20 words
A process according to claim 1, wherein the catalyst is aluminium chloride used in the proportion of 0.5 to 2%.
Claim 8
Dependent Claim
22 words
A process according to claim 1, wherein the hydrocarbonated solvent is constituted by the hydrocarbons which did not react during the polymerization.
Claim 9
Dependent Claim
7 words
Petroleum resins prepared according to claim 1.
References Cited (Backward Citations)
US2750359A
Cited
US3880820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-05 | 1983-05-07 | 1983-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-05 | 1987-05-07 | 1987-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-05 | 1991-05-07 | 1991-11-06 | $7700.00 | Window Closed / Lapsed |