GB679912A - Improvements in or relating to phenolaldehyde condensation products - Google Patents
Improvements in or relating to phenolaldehyde condensation productsInfo
- Publication number
- GB679912A GB679912A GB2098948A GB2098948A GB679912A GB 679912 A GB679912 A GB 679912A GB 2098948 A GB2098948 A GB 2098948A GB 2098948 A GB2098948 A GB 2098948A GB 679912 A GB679912 A GB 679912A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phenol
- aldehyde
- water
- metal hydroxide
- sodium
- 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
- C08G8/12—Condensation polymers of aldehydes or ketones with phenols only of aldehydes of formaldehyde, e.g. of formaldehyde formed in situ with monohydric phenols having only one hydrocarbon substituent ortho on para to the OH group, e.g. p-tert.-butyl phenol
-
- 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
A thermosetting phenol-aldehyde condensate is made by forming an aqueous mixture of a phenol, an aldehyde in which the aldehyde group is the sole reactive group, and an alkali metal hydroxide as catalyst, the latter being present in an amount, expressed as sodium hydroxide, added initially and subsequently not exceeding 10 per cent by weight of the total initial mix constituents (including water), and the molar ratio of the aldehyde to the phenol varying from 1 : 1 to 3 : 1, heat-reacting the mix and producing a water-soluble reaction product, reducing the viscosity of the latter and its tendency to progress to a water-insoluble product by adding thereto an alkali-metal hydroxide, further condensing the product by heating and repeating the addition of alkali metal hydroxide and the condensation until a stable stage close to final setting into insolubility is reached, in which the pH is between 9.5 and 14. Catalysts specified are sodium, potassium and lithium hydroxides, and sodium phenate formed by combination of caustic soda and phenol prior to the beginning of the reaction. In examples (1, 2, 8, 9, 10) phenol and formaldehyde, (3) cresol and formaldehyde, (4) petroleum cresylic, (5) phenol and furfural, (6) phenol and acetaldehyde, and (7) phenol and benzaldehyde, are reacted in the presence of caustic soda. Xylenol may also be used instead of phenol. The products may be used, e.g. by mixing water and walnut shell flour with the liquid resins, as adhesives in making plywood, for impregnating a web or sheet of paper, cloth or other fibrous material and making paper, fibreboard and paperboard by precipitating the resin in and on the fibre by means of hydrochloric, sulphuric or acetic acid or alum. Specification 617,506 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2098948A GB679912A (en) | 1948-08-09 | 1948-08-09 | Improvements in or relating to phenolaldehyde condensation products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2098948A GB679912A (en) | 1948-08-09 | 1948-08-09 | Improvements in or relating to phenolaldehyde condensation products |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB679912A true GB679912A (en) | 1952-09-24 |
Family
ID=10155281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2098948A Expired GB679912A (en) | 1948-08-09 | 1948-08-09 | Improvements in or relating to phenolaldehyde condensation products |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB679912A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2882745A (en) * | 1955-06-09 | 1959-04-21 | Norton Co | Automatic balancing mechanism for rotating elements |
-
1948
- 1948-08-09 GB GB2098948A patent/GB679912A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2882745A (en) * | 1955-06-09 | 1959-04-21 | Norton Co | Automatic balancing mechanism for rotating elements |
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