Light-colored, low molecular weight phenolic-modified rosin este

Chemistry: natural resins or derivatives; peptides or proteins; – Natural resins or derivatives – Rosin or derivative used as starting material in process – or...

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530213, 530215, 530216, 530218, 530219, 528 86, 528167, 528171, 528176, 528211, 156327, 156335, 525 544, C09F 102, C09F 104

Patent

active

060229470

ABSTRACT:
Light-colored phenolic-modified rosin esters, suitable for use as, for example, tackifiers in adhesive compositions, are prepared by reacting together rosin, a phenolic compound, formaldehyde or a reactive equivalent thereof, and a non-phenolic hydroxyl-containing organic compound in the presence of at least one lightening agent selected from phenol sulfide compounds, phosphorous acid, esters of phosphorous acid, and hypophosphite salts. The formaldehyde or reactive equivalent is present in an amount ranging from about 1.1 to about 3.5 equivalents of --CHO moieties per 1 equivalent of Ar--OH moiety of the phenolic compound, in order to obtain rosin esters having desirably low color, and adequately low molecular weight to effectively function as tackifiers.

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Union Camp. Uni-Rez.RTM. Product Data, "Uni-Rez.RTM. 9200 Phenolic Modified Resin," Union Camp Corporation .cndot. Chemical Products Division, Sep. 1994, 2 pages.

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