MX167900B - PROCEDURE FOR PRODUCING STABILIZED POLYETHYRENE COMPOSITIONS - Google Patents
PROCEDURE FOR PRODUCING STABILIZED POLYETHYRENE COMPOSITIONSInfo
- Publication number
- MX167900B MX167900B MX2699584A MX2699584A MX167900B MX 167900 B MX167900 B MX 167900B MX 2699584 A MX2699584 A MX 2699584A MX 2699584 A MX2699584 A MX 2699584A MX 167900 B MX167900 B MX 167900B
- Authority
- MX
- Mexico
- Prior art keywords
- group
- phenol
- compound
- polymer
- monomer
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F12/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F12/02—Monomers containing only one unsaturated aliphatic radical
- C08F12/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F12/06—Hydrocarbons
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Polymerisation Methods In General (AREA)
Abstract
La presente invención se refiere a procedimiento para la producción de composiciones poliméricas elegidas de poliestireno y poli(p-metilestireno) que tienen estabilidad mejorada contra la degradación, el procedimiento comprende someter monómero de estireno o p-metilestireno o polimerización térmica con o sin la adición de iniciadores para polimerización de radicales libres para lograr una conversión de monómero a polímero de por lo menos aproximadamente 65 por ciento en peso y recuperar el políemro así formado, caracterizado porque una solución o suspensión de estabilizador de polímero se agrega al monómero o a la mezcla polimerizante a un punto en el procedimiento en el que aún ha de ocurrir una conversión adicional de monómero al polímero de no menos de aproximadamente 3 por ciento, el estabilizador de polímero es una mezcla de un compuesto de fenol impedido y un compuesto de polifosfito en una proporción en peso de compuesto de fenol impedido a compuesto de polifosfito desde aproximadamente 1:2 hasta aproximadamente 1:4, la cantidad de estabilizador de polímero es tal que proporciona de aproximadamente 0.1 a aproximadamente 6 por ciento en peso con base en el poliestireno o poli(p-metilestireno), el compuesto de fenol impedido se elige del grupo que consiste de 2,6-di-ter,butil-4-metil fenol y compuestos de fenol que tienen por lo menos 2 y no más de 4 grupso fenol, cada grupo fenol está ligado directamente o a través de un grupo alquileno, alcoxi oa rilo de un átomo de carbono de un anillo aromático a un átomo de carbono del anillo aromático de por lo menos otro grupo fenol y cada grupo fenol tiene en el anillo aromáti co por lo menos un substituyente alquilo que comprende por lo menos un grupo butilo terciario orto respecto al grupo hidroxi, el compuesto polifosfito se elige del grupo que consiste de compuestos que tienen de 2 a 8 grupos fosfito, cada compuesto tiene cada átomo de fósforo ligado directamente a los tres átomos de oxígeno separados cuyos átomos de oxígeno también están ligados directamente a un átomo de carbono de un grupo alquilo, arilo, alcoxi o ariloxi.The present invention relates to a process for the production of selected polymeric compositions of polystyrene and poly (p-methylstyrene) having improved stability against degradation, the process comprises subjecting styrene or p-methylstyrene monomer or thermal polymerization with or without the addition of free radical polymerization initiators to achieve a monomer to polymer conversion of at least about 65 percent by weight and to recover the thus formed polymer, characterized in that a polymer stabilizer solution or suspension is added to the monomer or polymerizing mixture At a point in the process where further conversion of monomer to polymer of not less than about 3 percent has yet to occur, the polymer stabilizer is a mixture of a hindered phenol compound and a polyphosphite compound in an amount by weight of hindered phenol compound to p compound oliphosphite from about 1: 2 to about 1: 4, the amount of polymer stabilizer is such that it provides from about 0.1 to about 6 weight percent based on polystyrene or poly (p-methylstyrene), the hindered phenol compound is selected from the group consisting of 2,6-di-ter, butyl-4-methyl phenol, and phenol compounds having at least 2 and not more than 4 groups of phenol, each phenol group is linked directly or through a group alkylene, alkoxy or ryl of a carbon atom from an aromatic ring to a carbon atom of the aromatic ring of at least one other phenol group and each phenol group has on the aromatic ring at least one alkyl substituent comprising at least an ortho tertiary butyl group relative to the hydroxy group, the polyphosphite compound is chosen from the group consisting of compounds having 2 to 8 phosphite groups, each compound having each phosphorus atom linked directly to the three atoms of oxygen separated whose oxygen atoms are also directly linked to a carbon atom of an alkyl, aryl, alkoxy or aryloxy group.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US47803083A | 1983-03-23 | 1983-03-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
MX167900B true MX167900B (en) | 1993-04-21 |
Family
ID=23898265
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MX2699584A MX167900B (en) | 1983-03-23 | 1984-03-22 | PROCEDURE FOR PRODUCING STABILIZED POLYETHYRENE COMPOSITIONS |
Country Status (5)
Country | Link |
---|---|
CA (1) | CA1212495A (en) |
DE (1) | DE3410406A1 (en) |
FR (1) | FR2543148B1 (en) |
GB (1) | GB2137213B (en) |
MX (1) | MX167900B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4839396A (en) * | 1988-08-22 | 1989-06-13 | The Dow Chemical Company | Expandable and expanded alkenyl aromatic polymer particles and methods of making the same |
DE4331808A1 (en) * | 1993-09-18 | 1995-03-23 | Basf Ag | Pearl-shaped, expandable styrene polymers containing sterically hindered phenols and process for their preparation |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4136142A (en) * | 1977-03-23 | 1979-01-23 | Polysar Limited | Process for extruding stabilized expanded polystyrene composition |
DE2854408A1 (en) * | 1978-12-16 | 1980-07-03 | Bayer Ag | THERMOPLASTIC POLYAETHERPOLYURETHANE WITH IMPROVED THERMOSTABILITY |
AU8224682A (en) * | 1981-04-30 | 1982-11-04 | Mobil Oil Corp. | Hindered phenol as stabilizer for styrene |
-
1984
- 1984-02-08 CA CA000447043A patent/CA1212495A/en not_active Expired
- 1984-03-21 GB GB08407271A patent/GB2137213B/en not_active Expired
- 1984-03-21 DE DE19843410406 patent/DE3410406A1/en not_active Withdrawn
- 1984-03-22 MX MX2699584A patent/MX167900B/en unknown
- 1984-03-22 FR FR8404429A patent/FR2543148B1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CA1212495A (en) | 1986-10-07 |
FR2543148B1 (en) | 1986-11-21 |
GB2137213B (en) | 1986-08-13 |
GB8407271D0 (en) | 1984-04-26 |
DE3410406A1 (en) | 1984-09-27 |
FR2543148A1 (en) | 1984-09-28 |
GB2137213A (en) | 1984-10-03 |
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