GB601308A - Mixed aldehyde condensation products and processes of producing same - Google Patents

Mixed aldehyde condensation products and processes of producing same

Info

Publication number
GB601308A
GB601308A GB9222/44A GB922244A GB601308A GB 601308 A GB601308 A GB 601308A GB 9222/44 A GB9222/44 A GB 9222/44A GB 922244 A GB922244 A GB 922244A GB 601308 A GB601308 A GB 601308A
Authority
GB
United Kingdom
Prior art keywords
formaldehyde
melamine
resorcinol
alkali
added
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
GB9222/44A
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.)
Wyeth Holdings LLC
Original Assignee
American Cyanamid Co
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 American Cyanamid Co filed Critical American Cyanamid Co
Publication of GB601308A publication Critical patent/GB601308A/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
    • C08G14/00—Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00
    • C08G14/02—Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00 of aldehydes
    • C08G14/04—Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00 of aldehydes with phenols
    • C08G14/06—Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00 of aldehydes with phenols and monomers containing hydrogen attached to nitrogen
    • C08G14/10—Melamines

Abstract

In a process of condensing together resorcinol, formaldehyde and an incompletely polymerized melamine-formaldehyde condensation product an alkali is added. The preferred molar ratio of resorcinol to formaldehyde (excluding formaldehyde combined with the melamine) varies between 1 : 1 and 1 : 3. Sufficient alkali is added to produce a pH of 7.5 or higher. Suitable alkalies are caustic soda, triethanolamine, potassium hydroxide, sodium carbonate, potassium carbonate, or triethylamine. Part of the melamine may be replaced by dicyandiamide or urea. The products are especially suitable for cold-setting adhesives and may be used to bond plywood or other laminated articles. Speed of curing may be adjusted by varying one or more of the following factors: the ratio of formaldehyde to resorcinol, the ratio of formaldehyde to melamine, and the alkalinity. In examples (1)-(8), a condensation product is used prepared from 1 mol. melamine and 3 mols. formaldehyde at pH 6.3, followed by dehydration at pH 8-8.5, cooling and grinding. The powder is water soluble. In example (1), this product is dissolved in formalin, and resorcinol and caustic soda are added and the mixture heated to 50 DEG C. The reaction is exothermic and the product gels and soon hardens to a clear or white mass. Example (2) is similar, but the condensation is effected without alkali, and the effect of adding varying amounts of alkali to portions of the condensation product is described. The products are particularly resistant to acids and boiling water. In example (9) trimethylol melamine is employed and in example (10) hexamethylol melamine. Specification 502,720 is referred to.
GB9222/44A 1943-07-08 1944-05-13 Mixed aldehyde condensation products and processes of producing same Expired GB601308A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US601308XA 1943-07-08 1943-07-08

Publications (1)

Publication Number Publication Date
GB601308A true GB601308A (en) 1948-05-04

Family

ID=22027555

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9222/44A Expired GB601308A (en) 1943-07-08 1944-05-13 Mixed aldehyde condensation products and processes of producing same

Country Status (1)

Country Link
GB (1) GB601308A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11231077B2 (en) * 2015-12-23 2022-01-25 Schlumberger Technology Corporation Torque transfer apparatus and methods of use

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11231077B2 (en) * 2015-12-23 2022-01-25 Schlumberger Technology Corporation Torque transfer apparatus and methods of use

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