Chemistry: natural resins or derivatives; peptides or proteins; – Natural resins or derivatives – Rosin or derivative used as starting material in process – or...
Patent
1996-12-12
1998-11-03
Nutter, Nathan M.
Chemistry: natural resins or derivatives; peptides or proteins;
Natural resins or derivatives
Rosin or derivative used as starting material in process, or...
530210, 530211, 530212, 530213, 530216, 530217, 530218, 530219, 530230, 530232, 530233, C09F 100, C09F 102, C09F 104, C09F 700
Patent
active
058309926
ABSTRACT:
Rosin esters that are both light colored and color stable are produced by reacting polyhydric alcohol with an equivalent excess of rosin, in the presence of calcium bis(monoethyl(3,5-di-tert-butyl-4-hydroxybenzyl)phosphonate. When phosphinic acid is added to the reaction mixture, light colored and color stable rosin esters are produced regardless of whether the rosin or polyol are in equivalent excess, although preferably the rosin is in equivalent excess. It is preferred to include a phenol sulfide compound, such as Vultac.RTM. 2, with the calcium bis(monoethyl(3,5-di-tert-butyl-4-hydroxybenzyl)phosphonate, and to add the phosphinic acid incrementally after the acid number of the rosin and polyhydric alcohol reaction mixture has dropped to about 100. Excess rosin is preferably stripped from the product mixture at about 275.degree. C.
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Nutter Nathan M.
Union Camp Corporation
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