GB871192A - Grafted polymers - Google Patents
Grafted polymersInfo
- Publication number
- GB871192A GB871192A GB14031/58A GB1403158A GB871192A GB 871192 A GB871192 A GB 871192A GB 14031/58 A GB14031/58 A GB 14031/58A GB 1403158 A GB1403158 A GB 1403158A GB 871192 A GB871192 A GB 871192A
- Authority
- GB
- United Kingdom
- Prior art keywords
- water
- soluble
- group
- polymerization
- assisted
- 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
- C08F291/00—Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds according to more than one of the groups C08F251/00 - C08F289/00
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B31/00—Preparation of derivatives of starch
- C08B31/08—Ethers
- C08B31/12—Ethers having alkyl or cycloalkyl radicals substituted by heteroatoms, e.g. hydroxyalkyl or carboxyalkyl starch
-
- 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
- C08F8/00—Chemical modification by after-treatment
- C08F8/12—Hydrolysis
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Graft Or Block Polymers (AREA)
Abstract
Water-soluble graft polymers are obtained by polymerizing an ethylenically unsaturated compound having the structure: <FORM:0871192/IV (a)/1> wherein X is a hydrogen atom or a methyl or ethyl group and Y is a carboxyl group, a carboxylic salt group, a nitrile group or an acid amide group in the presence of water-soluble polymeric material, other than a protein, containing a C-H bond having a molecular weight greater than 1000, and, if necessary to impart water-solubility, hydrolysing the polymerization product, the amount of the preformed polymeric substance present in the graft polymer being between 5% and 50% by weight. Water-soluble preformed polymers specified are polyvinyl alcohol, polyvinyl pyridine, polyacrylic and polymethacrylic acids and amides, starch, starch ethers, e.g. isopropylated starch, dextrins, cellulose ethers and polyethylene oxide. Monomers specified are acrylonitrile and acrylamide. Polymerization may be carried out in an aqueous medium with the assistance of catalysts, e.g. peroxides and persulphates, or mixtures of persulphates with reducing agents. The hydrolysis of the polymerization products, when carried out, may be partial or complete and may be effected by means of acid or alkaline hydrolysing agents. Specification 715,194 is referred to.ALSO:The settlement and filtration of aqueous suspensions of ores and waste waters is assisted by the addition thereto of water-soluble graft polymers made by the polymerization of an ethylenically unsaturated compound in the presence of a water-soluble preformed polymeric substance (see Group IV(a)). Examples describe the addition of graft polymers to coal talings and to the precipitates obtained in successive acid and alkaline treatments of scheelite. Specification 715,194 is referred to.ALSO:The settlement and filtration of aqueous suspensions of ores is assisted by the addition thereto of water-soluble graft polymers made by the polymerization of an ethylenically unsaturated compound in the presence of a water-soluble preformed polymeric substance (see Group IV(a)). In an Example (9) scheelite is treated with concentrated hydrochloric acid to form a colloidal precipitate of tungstic acid and other insoluble substances the flocculation and settling of which is assisted by the addition of a hydrolysed acrylonitrile/starch ether graft polymer, the ore precipitate is then dissolved in ammonium hydroxide to form a precipitate of silica, the flocculation and settling of which is assisted by the graft polymer remaining from the first stage of the process. Specification 715,194 is referred to.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL106028D NL106028C (en) | 1958-05-02 | ||
NL238772D NL238772A (en) | 1958-05-02 | ||
BE578273D BE578273A (en) | 1958-05-02 | ||
GB14031/58A GB871192A (en) | 1958-05-02 | 1958-05-02 | Grafted polymers |
DEI16357A DE1128982B (en) | 1958-05-02 | 1959-04-29 | Process for the production of water-soluble graft copolymers |
FR793777A FR1226782A (en) | 1958-05-02 | 1959-05-02 | Water-soluble graft polymers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB14031/58A GB871192A (en) | 1958-05-02 | 1958-05-02 | Grafted polymers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB871192A true GB871192A (en) | 1961-06-21 |
Family
ID=10033741
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB14031/58A Expired GB871192A (en) | 1958-05-02 | 1958-05-02 | Grafted polymers |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE578273A (en) |
DE (1) | DE1128982B (en) |
FR (1) | FR1226782A (en) |
GB (1) | GB871192A (en) |
NL (2) | NL238772A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3839081A (en) * | 1973-08-22 | 1974-10-01 | American Cyanamid Co | Acrylic fiber having a high water absorbency and a wool-like hand and process therefore |
US4255532A (en) * | 1979-02-21 | 1981-03-10 | American Cyanamid Company | Acrylic polymer composition for melt-spinning |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107716121B (en) * | 2017-09-29 | 2019-07-23 | 江西理工大学 | Application of the hydroxypropyl starch ether in Scheelite Flotation |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1015601B (en) * | 1952-11-08 | 1957-09-12 | Eastman Kodak Co | Process for the preparation of spinnable acrylonitrile polymerization products |
NL202164A (en) * | 1954-11-18 | |||
DE1009812B (en) * | 1955-12-24 | 1957-06-06 | Roehm & Haas Gmbh | Process for the preparation of polymethacrylic acid salts |
DE1027402B (en) * | 1956-07-23 | 1958-04-03 | Roehm & Haas Gmbh | Process for the preparation of polymethacrylic acid salts |
-
0
- NL NL106028D patent/NL106028C/xx active
- BE BE578273D patent/BE578273A/xx unknown
- NL NL238772D patent/NL238772A/xx unknown
-
1958
- 1958-05-02 GB GB14031/58A patent/GB871192A/en not_active Expired
-
1959
- 1959-04-29 DE DEI16357A patent/DE1128982B/en active Pending
- 1959-05-02 FR FR793777A patent/FR1226782A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3839081A (en) * | 1973-08-22 | 1974-10-01 | American Cyanamid Co | Acrylic fiber having a high water absorbency and a wool-like hand and process therefore |
US4255532A (en) * | 1979-02-21 | 1981-03-10 | American Cyanamid Company | Acrylic polymer composition for melt-spinning |
Also Published As
Publication number | Publication date |
---|---|
FR1226782A (en) | 1960-08-16 |
NL106028C (en) | |
DE1128982B (en) | 1962-05-03 |
NL238772A (en) | |
BE578273A (en) |
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