GB927454A - Process for the manufacture of a phenol-formaldehyde resin adhesive - Google Patents

Process for the manufacture of a phenol-formaldehyde resin adhesive

Info

Publication number
GB927454A
GB927454A GB5790/60A GB579060A GB927454A GB 927454 A GB927454 A GB 927454A GB 5790/60 A GB5790/60 A GB 5790/60A GB 579060 A GB579060 A GB 579060A GB 927454 A GB927454 A GB 927454A
Authority
GB
United Kingdom
Prior art keywords
extracts
specified
tanning
alkali metal
manufacture
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
GB5790/60A
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.)
State of Israel
Original Assignee
State of Israel
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 State of Israel filed Critical State of Israel
Priority to FR817967A priority Critical patent/FR1248295A/en
Publication of GB927454A publication Critical patent/GB927454A/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Abstract

In a process for the manufacture of a phenolformaldehyde resin adhesive an aqueous vegetable tanning-extract containing condensed tannins or a mixture of such extracts is mixed with not more than 10% by weight of an alkali metal hydroxide and/or an inorganic salt that is chemically reducing, the mixture is heated so as to lower its viscosity (see Group IV(b)) and is then mixed with 5-15% by weight of formaldehyde or para-formaldehyde. Tanning extracts specified for use in the process are aqueous extracts of the bark or wood of trees, e.g. eucolyptus, mimosa, quebracho or mangrove which are used as tanning agents in the leather industry. Reducing salts specified include titanium trichloride, alkali metal hypophosphites, bisulphites, metabisulphites, dithioates, sulphides and sulphites. Fillers specified for use in the adhesives include powdered walnut shell, wood flour or olive kernel flour. Catalysts specified for use in the adhesives include ferrous or ferric, titanium and copper salts. The adhesives are employed in plywood manufacture.ALSO:The invention comprises a phenolic product for use in the manufacture of a phenolformaldehyde resin (see Group IV(a)) which is a dipolymerisate obtained by adding to an aqueous vegetable tanning extract containing condensed tannins or a mixture of such extracts not more than 10% by weight of an alkali metal hydroxide and/or an inorganic salt that is chemically reducing and heating the extract so as to lower its viscosity. Tanning extracts specified for use in the process are aqueous extracts of the bark of wood of trees, e.g. eucalyptus, mimosa, quebracho or mangrove which are used as tanning agents in the leather industry. Reducing salts specified include titanium trichloride, alkali metal hypophosphites, bisulphites, meta-bisulphites, dithionites, sulphides and sulphites. The sulphiting agents are preferably employed in a proportion not exceeding 2% by weight. Examples are furnished.
GB5790/60A 1959-02-19 1960-01-26 Process for the manufacture of a phenol-formaldehyde resin adhesive Expired GB927454A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR817967A FR1248295A (en) 1959-02-19 1960-02-09 Bulkhead Type Heat Exchangers Improvements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IL1235059 1959-03-18

Publications (1)

Publication Number Publication Date
GB927454A true GB927454A (en) 1963-05-29

Family

ID=11043143

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5790/60A Expired GB927454A (en) 1959-02-19 1960-01-26 Process for the manufacture of a phenol-formaldehyde resin adhesive

Country Status (3)

Country Link
BE (1) BE588298A (en)
GB (1) GB927454A (en)
OA (1) OA01055A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3389101A (en) * 1965-07-30 1968-06-18 Simpson Timber Co Redwood extract substituted-phenolic resin adhesive
US4045386A (en) * 1975-05-02 1977-08-30 Champion International Corporation Alkali-treated bark extended tannin-aldehyde resinous adhesives
US4113919A (en) * 1975-11-19 1978-09-12 Champion International Corporation Process for in situ formation of a tree-derived resinous adhesive composition

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111961429B (en) * 2020-07-07 2022-04-12 广西大学 Preparation method of eucalyptus bark powder modified phenolic resin wood adhesive

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3389101A (en) * 1965-07-30 1968-06-18 Simpson Timber Co Redwood extract substituted-phenolic resin adhesive
US4045386A (en) * 1975-05-02 1977-08-30 Champion International Corporation Alkali-treated bark extended tannin-aldehyde resinous adhesives
US4113919A (en) * 1975-11-19 1978-09-12 Champion International Corporation Process for in situ formation of a tree-derived resinous adhesive composition

Also Published As

Publication number Publication date
BE588298A (en) 1960-07-01
OA01055A (en) 1968-08-07

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