Suspension-enhancing adhesive additive for paper manufacturing, liquid adhesive composition using same, and method of preparing liquid adhesive composition

A method of preparing a starch-based, liquid adhesive composition for manufacturing corrugated paperboard, comprising:

• using an effective amount of a starch, characterized by having a substantially straight-chain configuration, to make a starch gel;
• diluting the starch gel with a desired amount of water;
• adding an additional, desired amount of the starch;
• and
• enhancing suspension of starch in the composition by adding to the composition a suspension-enhancing agent which includes a synthetic liquid polymer component that is a copolymer based upon an acrylic-acid monomer and an aromatic monomer substituted with an acrylate compound, and which polymer component includes an effective amount of the alcohol-ester coalescing agent 2,2,4-trimethyl-1,3-pentanediol mono(2-methylpropanoate), and which polymer component is emulsifiable in the composition, and is capable of enhancing suspension of such starch.

A liquid adhesive composition for manufacturing corrugated paperboard, consisting essentially of:

• an effective amount of a starch whose chemical composition is characterized by having a substantially straight-chain configuration;
• a suspension-enhancing agent which includes a synthetic liquid polymer component that is a copolymer based upon an acrylic-acid monomer and an aromatic monomer substituted with an acrylate compound, and which polymer component is emulsifiable in the composition, and is capable of enhancing suspension of such starch;
• water;
• and
• with the overall composition including between 0.5%-1.0% by weight of the suspension-enhancing agent, between 21.5-25.5% by weight of the starch, and between 73.5-78% by weight of the water.

A method of preparing a starch-based, liquid adhesive composition for manufacturing corrugated paperboard, comprising:

• using an effective amount of a starch, characterized by having a substantially straight-chain configuration, to make a starch gel;
• diluting the starch gel with a desired amount of water;
• adding an additional, desired amount of the starch;
• and
• enhancing suspension of starch in the composition by adding to the composition a suspension-enhancing agent which includes a synthetic liquid polymer component that is a copolymer based upon an acrylic-acid monomer and an aromatic monomer substituted with an acrylate compound, and which polymer component is emulsifiable in the composition, and is capable of enhancing suspension of such starch.