UST908009I4 - Defensive publication - Google Patents
Defensive publication Download PDFInfo
- Publication number
- UST908009I4 UST908009I4 US908009DH UST908009I4 US T908009 I4 UST908009 I4 US T908009I4 US 908009D H US908009D H US 908009DH US T908009 I4 UST908009 I4 US T908009I4
- Authority
- US
- United States
- Prior art keywords
- hydroxyphenyl
- prepared
- hydrogenation
- acetic acids
- ketenes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/06—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from hydroxycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/09—Preparation of carboxylic acids or their salts, halides or anhydrides from carboxylic acid esters or lactones
Definitions
- Certain substituted p-(hydroxyphenyl)acetic acids may be prepared by hydrogenation of the mono-beta-lactones prepared from disubstituted ketenes and p-quinones, at temperatures Within the range of 0l50 C. and pressures ranging from one to several hundred atmospheres in the presence of a hydrogenation catalyst such as palladium, platinum, rhodium, ruthenium or nickel.
- the acid products obtained by the process may be readily converted by well-known autopolyrnerization procedures to polyesters useful in the production of clear, transparent sheets, films, filaments, fibers, molded articles and other valuable arti- 0165 of commerce having excellent physical properties.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Polyesters Or Polycarbonates (AREA)
Abstract
CERTAIN SUBSTITUTED P-(HYDROXYPHENYL)ACETIC ACIDS, TYPIFIED BY 2-METHYL-2-(P-HYDROXYPHENYL) PROPIONIC ACID, MAY BE PREPARED BY HYDROGENATION OF THE MONO-BETA-LACTONES PREPARED FROM DISUBSTITUTED KETENES AND P-QUINONES, AT TEMPERATURES WITHIN THE RANGE OF 0-150* C. AND PRESSURES RANGING FROM ONE TO SEVERAL HUNDRED ATMOSPHERES IN THE PRESENCE OF A HYDROGENATION CATALYST SUCH AS PALLADIUM, PLATINUM, RODIUM, RUTHENIUM OR NICKEL. THE ACID PRODUCTS OBTAINED BY THE PROCESS MAY BE READILY CONVERTED BY WELL-KNOWN AUTOPOLYMERIZATION PROCEDURES TO POLYESTERS USEFUL IN THE PRODUCTION OF CLEAR, TRANSPARENT SHEETS, FILMS, FILAMENTS, FIBERS, MOLDED ARTICLES AND OTHER VALUABLE ARTICLES OF COMMERCE HAVING EXCELLENT PHYSICAL PROPERTIES.
Description
DEFENSIVE PUBLICATIGN UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 O.G. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.
Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Ofiice makes no assertion us to the novelty of the disclosed subject matter.
PUBLISHED MARCH 27, 1973 T908 009 PROCESS OF PREPAIRIING SUBSTITUTED p-(HYDRDXYPHENYL) ACETIC ACIDS James C. Martin, 601 N. Mountain View Circle, Johnson City, Tenn. 37601, and Paul G. Gott, 1017 Watauga St., Kingsport, Tenn. 37660 Filed Dec. 8, 1971, Ser. No. 206,178 Int. Cl. C07c 65/02 US. Cl. 260-521 R No Drawing. 12 Pages Specification Certain substituted p-(hydroxyphenyl)acetic acids, typified by 2-methyl-2-(p-hydroxyphenyl) propionic acid, may be prepared by hydrogenation of the mono-beta-lactones prepared from disubstituted ketenes and p-quinones, at temperatures Within the range of 0l50 C. and pressures ranging from one to several hundred atmospheres in the presence of a hydrogenation catalyst such as palladium, platinum, rhodium, ruthenium or nickel. The acid products obtained by the process may be readily converted by well-known autopolyrnerization procedures to polyesters useful in the production of clear, transparent sheets, films, filaments, fibers, molded articles and other valuable arti- 0165 of commerce having excellent physical properties.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US20617871A | 1971-12-08 | 1971-12-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| UST908009I4 true UST908009I4 (en) | 1973-03-27 |
Family
ID=22765293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US908009D Pending UST908009I4 (en) | 1971-12-08 | 1971-12-08 | Defensive publication |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | UST908009I4 (en) |
-
1971
- 1971-12-08 US US908009D patent/UST908009I4/en active Pending
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