| abstract |
PCT No. PCT/SE93/00970 Sec. 371 Date May 16, 1995 Sec. 102(e) Date May 16, 1995 PCT Filed Nov. 15, 1993 PCT Pub. No. WO94/12272 PCT Pub. Date Jun. 9, 1994Surfactant obtainable by and method for the production thereof comprising (1) esterifying a rosin with an alcohol to an acid value of less than 30, (2a) grafting the rosin ester with an unsaturated carboxylic acid or anhydride, the mole ratio carboxylic acid or anhydride/rosin (calculated as each rosin associated with a rosin ester) being from 0.05:1-1.5:1, (3a) esterifying the grafted rosin ester with a polyethylene glycol with an Mw of 1000-20000 the mole ratio glycol/free carboxylic acid group being from 0.2:1-1:1 to an acid value of less than 30, alternatively (2b) esterifying an unsaturated carboxylic acid or anhydride with a polyethylene glycol with a Mw of 1000-20000 the mole ratio glycol/free carboxylic acid group or anhydride being from 0.2:1-1:1 to an acid value less than 30, (3b) grafting the rosin ester from (1) with the ester from (2b), the mole ratio ester from (2b)/rosin ester (calculated as in (2a)) being from 0.05:1-1.5:1. The invention also relates to the use of the surfactant as a dispersing agent for tackifiers, to an aqueous tackifier dispersion comprising the surfactant as well as to the use of the aqueous tackifier dispersion in a pressure sensitive adhesive. |