GB296514A - Improvements in the manufacture of phenolic resins - Google Patents
Improvements in the manufacture of phenolic resinsInfo
- Publication number
- GB296514A GB296514A GB1805527A GB1805527A GB296514A GB 296514 A GB296514 A GB 296514A GB 1805527 A GB1805527 A GB 1805527A GB 1805527 A GB1805527 A GB 1805527A GB 296514 A GB296514 A GB 296514A
- Authority
- GB
- United Kingdom
- Prior art keywords
- water
- extraction
- phenolic
- filler
- value
- 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
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G8/00—Condensation polymers of aldehydes or ketones with phenols only
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Color Printing (AREA)
Abstract
296,514. British Dyestuffs Corporation, Ltd., Strafford, N., and Walker, E.E. July 7, 1927. Phenolic condensation prodructs.-Free phenol and soluble condensation products, usually of low molecular weight, are removed from resinous phenolic condensation products by incorporating the resins with an inert filler such as wood, meal or pulp, cotton &c. wastes, asbestos, china clay, fullers earth, &c. and extracting with a solvent such as water, benzene or ether. Instead of incorporating with a filler, the resin may be spread on paper or fabric, and after extraction of the phenolic impurities the sheets may be dried and pressed to form laminated products. The extraction may be preceded, accompanied or followed by adjustment of the pH, preferably to a value beween 3.5 and 7. Specification 259,046 is referred to in this respect. The liquid resole, or the solid obtained by evaporation of water, is incorporated with the filler or spread on sheets in thin layers, and suspended in water. The pH value is adjusted by the addition of soluble acids or alkalies, in the presence or absence of " buffer '' substances such as sodium salts of weak acids. It is preferable to adjust the pH value before extracting the phenolic impurities. After extraction, the resin may either be dissolved off the substratum and used as a varnish, or separated from water, dried and the whole used as a moulding powder. Catalysts, plastics, pigments, &c. may be added before use. Several examples are given.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1805527A GB296514A (en) | 1927-07-07 | 1927-07-07 | Improvements in the manufacture of phenolic resins |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1805527A GB296514A (en) | 1927-07-07 | 1927-07-07 | Improvements in the manufacture of phenolic resins |
Publications (1)
Publication Number | Publication Date |
---|---|
GB296514A true GB296514A (en) | 1928-09-06 |
Family
ID=10105851
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1805527A Expired GB296514A (en) | 1927-07-07 | 1927-07-07 | Improvements in the manufacture of phenolic resins |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB296514A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0209572A1 (en) * | 1985-01-11 | 1987-01-28 | The Dow Chemical Company | Epoxy novolac resins having reduced 2-functional components and a process for reducing 2-functional components in novolac resins |
US5086094A (en) * | 1988-09-07 | 1992-02-04 | The Dow Chemical Company | Organic solvent solutions of phosphate esters of epoxy resins |
-
1927
- 1927-07-07 GB GB1805527A patent/GB296514A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0209572A1 (en) * | 1985-01-11 | 1987-01-28 | The Dow Chemical Company | Epoxy novolac resins having reduced 2-functional components and a process for reducing 2-functional components in novolac resins |
EP0209572A4 (en) * | 1985-01-11 | 1988-10-24 | Dow Chemical Co | Epoxy novolac resins having reduced 2-functional components and a process for reducing 2-functional components in novolac resins. |
US5086094A (en) * | 1988-09-07 | 1992-02-04 | The Dow Chemical Company | Organic solvent solutions of phosphate esters of epoxy resins |
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