GB941087A - Modified polypropylene and process for producing it - Google Patents
Modified polypropylene and process for producing itInfo
- Publication number
- GB941087A GB941087A GB4571961A GB4571961A GB941087A GB 941087 A GB941087 A GB 941087A GB 4571961 A GB4571961 A GB 4571961A GB 4571961 A GB4571961 A GB 4571961A GB 941087 A GB941087 A GB 941087A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ethylene
- polymer
- propylene
- polymerization
- polypropylene
- 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
- C08F297/00—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer
- C08F297/06—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type
- C08F297/08—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type polymerising mono-olefins
- C08F297/083—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type polymerising mono-olefins the monomers being ethylene or propylene
- C08F297/086—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the coordination type polymerising mono-olefins the monomers being ethylene or propylene the block polymer contains at least three blocks
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Graft Or Block Polymers (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
Abstract
941,087. Polypropylene block copolymers. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. Dec. 20, 1961 [Dec. 22, 1960], No. 45719/61. Drawings to Specification. Heading C3P. A modified polypropylene is made which consists of at least 90% of highly isotactic polypropylene chains uninterrupted by ethylene and having attached to the ends of at least a proportion of the polypropylene molecules a portion of ethylene-propylene copolymer, the total amount of ethylene in the polymer being in the range of 2 to 8% by weight and the proportion of ethylene in the ethylene-propylene copolymer being between 20 and 90% by weight. The modified polypropylene is made by polymerizing propylene in contact with a stereospecific polymerization catalyst until the concentration of the polymer in the reaction mixture is at least 90% of the desired final concentration, continuing polymerization in the presence of ethylene in an amount sufficient to provide the desired amount of combined ethylene in the final polymer, while maintaining the concentration of propylene in excess of that of ethylene until the latter has polymerized, then stopping the polymerization and recovering the polymer. The process may be carried out continuously in a plurality of reactors operated with a series flow of polymer from one reactor to the next, the polymerization of propylene being carried out in all but the last reactor, and in that reactor a mixture of ethylene and propylene is polymerized. The catalysts used are of the Ziegler type, e.g. titanium trichloride+aluminium diethyl chloride. The reaction is carried out in a solvent medium, e.g. heptane. Also present during polymerization may be modifiers, e.g. hydrogen, zinc diethyl, tributyl phosphite, ethyl acetate or dimethyl formamide.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US7777660A | 1960-12-22 | 1960-12-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB941087A true GB941087A (en) | 1963-11-06 |
Family
ID=22139993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4571961A Expired GB941087A (en) | 1960-12-22 | 1961-12-20 | Modified polypropylene and process for producing it |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE611792A (en) |
| DE (1) | DE1520748B2 (en) |
| GB (1) | GB941087A (en) |
| NL (1) | NL272738A (en) |
| SE (1) | SE302852B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3529037A (en) * | 1966-10-25 | 1970-09-15 | Hugh John Hagemeyer Jr | Polyallomers and process for preparing same |
| DE2414508A1 (en) * | 1973-03-26 | 1974-10-10 | Dart Ind Inc | POLYMER BLEND |
| US4254237A (en) | 1978-04-21 | 1981-03-03 | Sumitomo Chemical Company, Limited | Process for producing propylene-ethylene block copolymers |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU61007A1 (en) * | 1970-05-28 | 1972-03-20 | ||
| JPS5247091A (en) * | 1975-10-13 | 1977-04-14 | Sumitomo Chem Co Ltd | Process for preparing block copolymers |
-
0
- NL NL272738D patent/NL272738A/xx unknown
- BE BE611792D patent/BE611792A/xx unknown
-
1961
- 1961-12-20 GB GB4571961A patent/GB941087A/en not_active Expired
- 1961-12-20 SE SE1272761A patent/SE302852B/xx unknown
- 1961-12-20 DE DE19611520748 patent/DE1520748B2/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3529037A (en) * | 1966-10-25 | 1970-09-15 | Hugh John Hagemeyer Jr | Polyallomers and process for preparing same |
| DE2414508A1 (en) * | 1973-03-26 | 1974-10-10 | Dart Ind Inc | POLYMER BLEND |
| US4254237A (en) | 1978-04-21 | 1981-03-03 | Sumitomo Chemical Company, Limited | Process for producing propylene-ethylene block copolymers |
Also Published As
| Publication number | Publication date |
|---|---|
| SE302852B (en) | 1968-08-05 |
| BE611792A (en) | |
| NL272738A (en) | |
| DE1520748B2 (en) | 1974-05-02 |
| DE1520748A1 (en) | 1969-07-31 |
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