US3880820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing thermoplastic resin
Assignee: Eneos Corp
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Filing: 1974-02-11
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Granted: 1975-04-29
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Expires: 1994-02-11
Abstract
Abstract A method for producing a thermoplastic resin for adhesive base materials of pressure-sensitive adhesives and hot-melt adhesives, which comprises the steps of: heating a C5 cracked petroleum oil fraction having a boiling point of 20* to 100*C at a temperature in the range of 100* to 300*C, whereby a Diels-Alder reaction occurs; separating the unreacted C5 component from the resulting fraction, and polymerizing the resulting fraction in the presence of Friedel-Crafts catalyst. The invention is characterized in that the raw material for the resin can be obtained in a large quantity and at a low cost, and the obtained resin has excellent properties compared to the conventionally used terpene resin.
Inventors
- 👤 Hisatake Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:19
CPC Classifications
C; C08; C08F; C08F240/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
83 words
A METHOD FOR PRODUCING THERMOPLASTIC RESINS WHICH HAVE EXCELLENT PROPERTIES AS THE ADHESIVE BASE MATERIALS FOR PRESSURE-SENSITIVE ADHESIVES AND HOT-MELT ADHESIVES WHICH COMPRISES THE STEPS OF: HEATING A C5 PETROLEUM OIL FRACTION, HAVING A BOILING POINT OF 20*-100*C, AND OBTAINED BY THE THERMAL OR CATALYTIC CRACKING OF PETROLEUM, TO A TEMPERATURE IN THE RANGE OF 100*-300*C. WHEREBY A DIELS-ALDER REACTION OCCURS, SEPARATING THE UNREACTED C5 COMPONENT FROM THE RESULTING FRACTION, AND THEN POLYMERIZING THE RESULTING FRACTION IN THE PRESENCE OF A FRIEDEL-CRAFTS CATALYST.
Claim 2
Independent Claim
83 words
A METHOD FOR PRODUCING THERMOPLASTIC RESINS WHICH HAVE EXCELLENT PROPERTIES AS THE ADHESIVE BASE MATERIALS FOR PRESSURE-SENSITIVE ADHESIVES AND HOT-MELT ADHESIVES WHICH COMPRISES THE STEPS OF: HEATING A C5 PETROLEUM OIL FRACTION, HAVING A BOILING POINT OF 20*-100*C, AND OBTAINED BY THE THERMAL OR CATALYTIC CRACKING OF PETROLEUM, TO A TEMPERATURE IN THE RANGE OF 100*-300*C. WHEREBY A DIELS-ALDER REACTION OCCURS, SEPARATING THE UNREACTED C5 COMPONENT FROM THE RESULTING FRACTION, AND THEN POLYMERIZING THE RESULTING FRACTION IN THE PRESENCE OF A FRIEDEL-CRAFTS CATALYST.
Claim 3
Dependent Claim
34 words
The method of claim 1 in which the temperature of the heating step is in the range of 150*-250* C. and the temperature of the polymerization step is in the range of 0*-80* C.
Claim 4
Dependent Claim
15 words
The method of claim 2 wherein the temperature of the polymerization step is 20*-60* C.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein the Friedel-Crafts catalyst is a metal halide.
Claim 6
Dependent Claim
23 words
The method of claim 4 wherein the metal halide is selected from the group consisting of aluminum chloride, boron trifluoride and complexes thereof.
Claim 7
Dependent Claim
20 words
The method of claim 1 wherein the polymerization step is carried out in the presence of an aromatic hydrocarbon solvent.
Claim 8
Dependent Claim
15 words
The method of claim 1 wherein the Friedel-Crafts catalyst concentration is 0.1-10 percent by weight.
Claim 9
Dependent Claim
14 words
The method of claim 1 wherein the unreacted C5 component is removed by distillation.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |