GB324913A - Improvements relating to the manufacture of condensation products from phenols and formaldehyde - Google Patents
Improvements relating to the manufacture of condensation products from phenols and formaldehydeInfo
- Publication number
- GB324913A GB324913A GB3218328A GB3218328A GB324913A GB 324913 A GB324913 A GB 324913A GB 3218328 A GB3218328 A GB 3218328A GB 3218328 A GB3218328 A GB 3218328A GB 324913 A GB324913 A GB 324913A
- Authority
- GB
- United Kingdom
- Prior art keywords
- formaldehyde
- condensation products
- condensing
- layer
- resinous layer
- 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
- C08G8/04—Condensation polymers of aldehydes or ketones with phenols only of aldehydes
- C08G8/08—Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ
- C08G8/10—Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ with phenol
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
324,913. Hessen, R. Nov. 5, 1928. Phenol-aldehyde condensation products are obtained by mixing the components in molecular proportions, condensing them by refluxing in the presence of a basic contact substance, removing the resulting aqueous layer from the resinous layer, adding further amounts of formaldehyde (one-third to one-quarter of the amount originally used) to the resinous layer, condensing and again removing the aqueous layer, these three latter operations being repeated two to four times until no free phenol remains in the resinous layer. In the subsequent additions of formaldehyde, a further amount of basic contact substance may also be added. After removal of the catalyst by neutralizing and washing, the resulting resins are relatively thin liquids, and are easily freed from water by evaporation. The solid resins are water-clear, soluble in alcohol, acetone, caustic soda, &c., and may be hardened by heating to temperatures commencing at about 60‹ C. Examples are given.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3218328A GB324913A (en) | 1928-11-05 | 1928-11-05 | Improvements relating to the manufacture of condensation products from phenols and formaldehyde |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3218328A GB324913A (en) | 1928-11-05 | 1928-11-05 | Improvements relating to the manufacture of condensation products from phenols and formaldehyde |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB324913A true GB324913A (en) | 1930-02-05 |
Family
ID=10334576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3218328A Expired GB324913A (en) | 1928-11-05 | 1928-11-05 | Improvements relating to the manufacture of condensation products from phenols and formaldehyde |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB324913A (en) |
-
1928
- 1928-11-05 GB GB3218328A patent/GB324913A/en not_active Expired
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