Method of making a carrier phase composition and a high-speed starch-based corrugating adhesive containing a carrier phase comprised of starch, modified starch or dextrin and polyvinyl alcohol

A method of making a corrugating adhesive composition which comprises the following sequential steps with continuous mixing:

• a) admixing with water from about 10 to about 30 parts starch per 100 parts of the corrugating adhesive composition and from about 0.3 to about 1 parts of a boron containing compound per 100 parts of the corrugating adhesive composition, while maintaining the temperature at from about 90.degree. F. to about 105.degree. F.;
• b) admixing from about 15 to about 50 parts of a carrier phase composition per 100 parts of the corrugating adhesive composition while maintaining the temperature at from about 125.degree. F. to about 165.degree. F. wherein the carrier phase composition was previously made by the following sequential steps with continuous mixing;
• c) admixing with water from about 0.1 to about 10 parts per 100 parts of the carrier phase composition of a cold water soluble polyvinyl alcohol having a degree of hydrolysis of less than about 92 mole % and from about 5 to about 30 parts per 100 parts of the carrier phase composition of a component selected from the group consisting of unmodified start and modified starch;
• d) heating the mixture to a temperature from about 125.degree. F. to about 165.degree. F.;
• e) admixing sufficient caustic to provide an alkaline pH while maintaining heating for a sufficient time and at a sufficient temperature to hydrolyze the polyvinyl alcohol to a degree of hydrolysis of more than about 95 mole %;
• and
• f) admixing additional water.