Preparation of cocondensates which produce weather-resistant bon

Details Preparation of cocondensates which produce weather-resistant bon Preparation of cocondensates which produce weather-resistant bon

1982-06-30

1984-07-03

Griffin, Ronald W.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

1563319, 525390, 525398, 524501, 524541, 524596, C08K 324, C08L 6114, C09J 100, C09J 316

Patent

active

044580495

ABSTRACT:
An aqueous solution of a resin glue comprising formaldehyde, urea, melamine and phenol is obtained when phenol, formaldehyde and not more than 0.35 mole of an alkali metal bisulfite per mole of phenol are reacted to give a phenol-formaldehyde condensate, formaldehyde and urea in a molar ratio of not more than 2.5 are reacted to give a urea-formaldehyde condensate, and the reaction products are in turn reacted with melamine and formaldehyde.

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patent: 4285848 (1981-08-01), Hickson
J. Org. Chem. 10 (1945), p. 477 (pp. 470-478).

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