GB623271A - Improvements relating to the manufacture of synthetic resinous compositions - Google Patents
Improvements relating to the manufacture of synthetic resinous compositionsInfo
- Publication number
- GB623271A GB623271A GB1084747A GB1084747A GB623271A GB 623271 A GB623271 A GB 623271A GB 1084747 A GB1084747 A GB 1084747A GB 1084747 A GB1084747 A GB 1084747A GB 623271 A GB623271 A GB 623271A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phenol
- prepared
- formaldehyde
- alkali
- heating
- 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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L97/00—Compositions of lignin-containing materials
- C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Phenolic Resins Or Amino Resins (AREA)
Abstract
Thermosetting resins are obtained by heating a liquid "resol" (prepared by refluxing a phenol with an equimolar or greater amount of formaldehyde in alkaline medium) and a liquid or solid "novolak" (prepared by heating a phenol with less than an equimolar amount of formaldehyde in acid medium) in proportions such that the molar ratio of initial phenol to initial formaldehyde is 0.85-1.20 to 1 in the presence of excess of alkali until substantially all uncombined phenol is eliminated, e.g. up to 120 DEG C. under vacuum. Preferably, the resol is present in such proportion that its catalyst alkali is stoichiometrically in excess of the acid catalyst of the novolak, but alkali may be added if necessary. The products may be ground and mixed with wood flour, lime and stearic acid to form moulding powders. Examples illustrate the heating together of resols prepared from phenol and formalin in the presence of caustic soda and novolaks prepared from phenol and formalin in the presence of sulphuric or oxalic acid. Specification 404,060 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1084747A GB623271A (en) | 1947-04-23 | 1947-04-23 | Improvements relating to the manufacture of synthetic resinous compositions |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1084747A GB623271A (en) | 1947-04-23 | 1947-04-23 | Improvements relating to the manufacture of synthetic resinous compositions |
Publications (1)
Publication Number | Publication Date |
---|---|
GB623271A true GB623271A (en) | 1949-05-16 |
Family
ID=9975411
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1084747A Expired GB623271A (en) | 1947-04-23 | 1947-04-23 | Improvements relating to the manufacture of synthetic resinous compositions |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB623271A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4020035A (en) | 1973-09-17 | 1977-04-26 | Albright & Wilson Limited | Resin compositions |
US4550015A (en) * | 1983-03-21 | 1985-10-29 | Plastics Engineering Company | Vitreous carbon and process for preparation thereof |
USRE32319E (en) * | 1983-03-21 | 1986-12-30 | Plastics Engineering Company | Vitreous carbon and process for preparation thereof |
-
1947
- 1947-04-23 GB GB1084747A patent/GB623271A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4020035A (en) | 1973-09-17 | 1977-04-26 | Albright & Wilson Limited | Resin compositions |
US4550015A (en) * | 1983-03-21 | 1985-10-29 | Plastics Engineering Company | Vitreous carbon and process for preparation thereof |
USRE32319E (en) * | 1983-03-21 | 1986-12-30 | Plastics Engineering Company | Vitreous carbon and process for preparation thereof |
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