GB973712A - Improvements in or relating to resins of the novolak-type - Google Patents

Improvements in or relating to resins of the novolak-type

Info

Publication number
GB973712A
GB973712A GB4339760A GB4339760A GB973712A GB 973712 A GB973712 A GB 973712A GB 4339760 A GB4339760 A GB 4339760A GB 4339760 A GB4339760 A GB 4339760A GB 973712 A GB973712 A GB 973712A
Authority
GB
United Kingdom
Prior art keywords
formaldehyde
hydroxybenzene compound
phenol
novolak
mixture
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
GB4339760A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB973712A publication Critical patent/GB973712A/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
    • 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
    • C08G8/10—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)
  • General Chemical & Material Sciences (AREA)
  • Phenolic Resins Or Amino Resins (AREA)
  • Measurement Of Radiation (AREA)
  • Light Receiving Elements (AREA)

Abstract

A novolak type resin is made by forming a pre-condensate by causing a mixture containing a hydroxybenzene compound, e.g. phenol, m-cresol or resorcinol, and formaldehyde in water, in a proportion of at least 3 mols of formaldehyde per mol of hydroxybenzene compound, to react in the presence of a basically-reacting substance until at least 2 mols of formaldehyde are bound per mol of hydroxybenzene compound, neutralising the reaction mixture and thereafter adding to the resulting mixture containing the pre-condensate, so much further hydroxybenzene compound that the gram-molecular ratio of total hydroxybenzene compound to free and bound formaldehyde becomes at least 1-17:1, and heating the resulting mixture in the presence of an acid-reacting substance until a novolak-type resin is obtained. The pre-condensate-forming reaction is preferably effected at 30 DEG to 50 DEG C. in the presence of a strong base, e.g. a hydroxide of an alkali or alkaline earth metal, and the condensation reaction may be effected at 80 DEG to 115 DEG C. under reflux, in the presence of a strong acid. In a typical example (1) a mixture of an aqueous phenol solution, formalin and Ca(OH)2 is heated at 50 DEG C. for 26 hours; further phenol is added to give the desired ratio of phenol to formaldehyde, after which the Ca(OH)2 in the mixture is neutralised with H2SO4 and precipitated CaSO4 is filtered off; the resulting mixture is heated to boiling, acidified with HCl and refluxed for 80 minutes to yield, after distilling off water under reduced pressure and neutralising the acid with MgO, a hard, brittle novolak resin. The resins may be mixed with known fillers and/or pigments and hardening agents, e.g. hexamethylenetetramine, and used as moulding powders, resin adhesives and cements.
GB4339760A 1959-12-21 1960-12-16 Improvements in or relating to resins of the novolak-type Expired GB973712A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL246663 1959-12-21

Publications (1)

Publication Number Publication Date
GB973712A true GB973712A (en) 1964-10-28

Family

ID=19752098

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4339760A Expired GB973712A (en) 1959-12-21 1960-12-16 Improvements in or relating to resins of the novolak-type

Country Status (4)

Country Link
CH (1) CH427269A (en)
DE (1) DE1197622B (en)
GB (1) GB973712A (en)
SE (1) SE300707B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4468507A (en) * 1983-11-21 1984-08-28 The Dow Chemical Company Method of limiting rate of heat evolution during acid-catalyzed phenol/polymethylolphenol condensations

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE897160C (en) * 1943-01-24 1953-11-19 Bakelite Ges M B H Process for the production of condensation products
DE906753C (en) * 1943-01-27 1954-03-18 Bakelite Ges M B H Process for the production of phenol-formaldehyde resins
DE899417C (en) * 1943-02-19 1953-12-10 Bakelite G M B H Process for the production of novolak type condensation products
US2513274A (en) * 1947-01-18 1950-07-04 Monsanto Chemicals Rapid-curing phenolic resins

Also Published As

Publication number Publication date
DE1197622B (en) 1965-07-29
CH427269A (en) 1966-12-31
SE300707B (en) 1968-05-06

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