GB433539A - Improvements in the manufacture of condensation products of phenols and formaldehyde - Google Patents

Improvements in the manufacture of condensation products of phenols and formaldehyde

Info

Publication number
GB433539A
GB433539A GB466034A GB466034A GB433539A GB 433539 A GB433539 A GB 433539A GB 466034 A GB466034 A GB 466034A GB 466034 A GB466034 A GB 466034A GB 433539 A GB433539 A GB 433539A
Authority
GB
United Kingdom
Prior art keywords
xylenol
cresol
formaldehyde
phenol
phenols
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
Application number
GB466034A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB466034A priority Critical patent/GB433539A/en
Publication of GB433539A publication Critical patent/GB433539A/en
Expired legal-status Critical Current

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
    • C08G8/28—Chemically modified polycondensates
    • C08G8/32—Chemically modified polycondensates by organic acids or derivatives thereof, e.g. fatty oils
    • 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
    • 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
    • C08G8/28—Chemically modified polycondensates

Abstract

Phenol-formaldehyde resins are manufactured by reacting formaldehyde with a cresol or a xylenol or a mixture thereof in the presence of more than 0,5 per cent of ammonia (calculated as 100 per cent ammonia on the amount of the phenol), the reaction being continued for a sufficient period of time, and the proportion of the phenol to formaldehyde being sufficient for the reaction product to be permanently fusible and soluble in drying oils. The maximum proportion of formaldehyde varies for different phenols, being 2,3 molecular proportions to one of p-cresol, 0,3 with m-cresol, 0,5 with a commercial mixture of xylenols and 0,8 with m-5-xylenol. It is not necessary to employ the maximum proportion of formaldehyde, a molecular proportion of 0,5 being generally suitable with most of the foregoing phenols, and also with o-cresol, m-4-xylenol, o-4-xylenol or p-xylenol. The minimum reaction time also varies with the phenol employed, being about 115 minutes with mixed xylenols and 70 minutes with p-cresol. The reaction time should preferably exceed the minimum, especially with phenols which react slowly, 2\ba1/2\be hours being usually suitable but 8--12 hours being desirable with o-cresol or m-4-xylenol. The products may be employed for making oil varnishes by dissolving in drying oil, e.g. linseed, tung or soya bean oil, heating until the desired viscosity is obtained and adding the usual solvents, and, if desired, driers. Examples describe the condensation of formaldehyde with: (1) mixed xylenols; (2) and (3) symxylenol; (4) p-xylenol; (5) o-4-xylenol; (6) m-4-xylenol; (7) and (8) p-cresol; (9) o-cresol; (10) m-cresol. Specifications 183,629, 334,232, [both in Class 2 (iii)], 345,276 and 389,099 are referred to. The Provisional Specifications comprise the use of alkaline condensing agents in general. The first Provisional Specification specifies additionally caustic soda and triethanolamine, as condensing agents, and contains an additional example in which formaldehyde is condensed with p-tert. amyl phenol. The second Provisional Specification comprises the use of any phenol substituted with a hydrocarbon radial, e.g. an alkyl, aryl, aralkyl or cyclohexyl group, and contains an additional example of the use of thymol.
GB466034A 1934-02-12 1934-02-12 Improvements in the manufacture of condensation products of phenols and formaldehyde Expired GB433539A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB466034A GB433539A (en) 1934-02-12 1934-02-12 Improvements in the manufacture of condensation products of phenols and formaldehyde

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB466034A GB433539A (en) 1934-02-12 1934-02-12 Improvements in the manufacture of condensation products of phenols and formaldehyde

Publications (1)

Publication Number Publication Date
GB433539A true GB433539A (en) 1935-08-12

Family

ID=9781377

Family Applications (1)

Application Number Title Priority Date Filing Date
GB466034A Expired GB433539A (en) 1934-02-12 1934-02-12 Improvements in the manufacture of condensation products of phenols and formaldehyde

Country Status (1)

Country Link
GB (1) GB433539A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE879015C (en) * 1941-09-24 1953-06-08 Byk Gulden Lomberg Chem Fab Process for the production of curable phenolic resins

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE879015C (en) * 1941-09-24 1953-06-08 Byk Gulden Lomberg Chem Fab Process for the production of curable phenolic resins

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