GB785148A - Method for the preparation of low molecular weight polymers of esters of methacrylic acid - Google Patents
Method for the preparation of low molecular weight polymers of esters of methacrylic acidInfo
- Publication number
- GB785148A GB785148A GB26293/55A GB2629355A GB785148A GB 785148 A GB785148 A GB 785148A GB 26293/55 A GB26293/55 A GB 26293/55A GB 2629355 A GB2629355 A GB 2629355A GB 785148 A GB785148 A GB 785148A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polymers
- molecular weight
- low molecular
- esters
- methacrylic acid
- 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.)
- Expired
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
- C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
- C08F20/62—Monocarboxylic acids having ten or more carbon atoms; Derivatives thereof
Abstract
Esters of methacrylic acid, e.g. the methyl, butyl and 2-ethylhexyl esters are polymerized to form low molecular weight polymers ranging from the dimer to those having a degree of polymerization of up to 50, by heating the monomers under autogenous pressure at temperatures between 225 DEG and 350 DEG C. in the absence of polymerization catalysts and inhibitors. If desired, the starting material may consist of a mixture of the monomer with one or more polymers ranging from the dimer to the pentamer. The polymerization product is liquid and is fractionally distilled under reduced pressure to separate the various low polymers.ALSO:Low molecular weight polymers of methacrylic acid esters, e.g the dimers, trimers, tetramers and pentamers, are made by heating the monomer under autogenous pressure at temperatures between 225 DEG and 350 DEG C. in the absence of polymerization catalysts and inhibitors. The various low polymers are separated from the reaction mixture by fractional distillation under reduced pressure. The prepartion of low molecular weight polymers of methyl, butyl and 2-ethylhexyl methacrylates is described, the individual polymers being separated and characterized by means of their boiling point, density, refractive index and saponification value.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT785148X | 1954-09-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB785148A true GB785148A (en) | 1957-10-23 |
Family
ID=11316495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB26293/55A Expired GB785148A (en) | 1954-09-24 | 1955-09-14 | Method for the preparation of low molecular weight polymers of esters of methacrylic acid |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB785148A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1268614B (en) * | 1963-03-07 | 1968-05-22 | Basf Ag | Process for the preparation of 1,3-dicyano-3-butene and its isomers from acrylonitrile |
| DE2621722A1 (en) * | 1976-05-15 | 1977-12-08 | Basf Ag | PROCESS FOR THE PRODUCTION OF COPOLYMERISATES FROM (METH) ACRYLIC ACID AND (METH) ACRYLIC ACID ESTERS |
-
1955
- 1955-09-14 GB GB26293/55A patent/GB785148A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1268614B (en) * | 1963-03-07 | 1968-05-22 | Basf Ag | Process for the preparation of 1,3-dicyano-3-butene and its isomers from acrylonitrile |
| DE2621722A1 (en) * | 1976-05-15 | 1977-12-08 | Basf Ag | PROCESS FOR THE PRODUCTION OF COPOLYMERISATES FROM (METH) ACRYLIC ACID AND (METH) ACRYLIC ACID ESTERS |
| DE2621722C3 (en) * | 1976-05-15 | 1983-11-17 | Basf Ag, 6700 Ludwigshafen | Process for the production of copolymers from (meth) acrylic acid and (meth) acrylic acid esters |
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