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OwnerFaissal-Ali El-Toufaili, Timo Laubscher +4inventors
InventorsFaissal-Ali El-Toufaili, Timo Laubscher, Juergen Detering, Martin Keller, Ines Debeasuvais De Vasconcelos, Dominik Lanzinger
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Described herein is a process for preparing solid acrylic acid polymers including: (a) preparing an aqueous acrylic acid polymer solution having a solids content of 30% to 70% by weight by free-radical polymerization, (b) neutralizing the aqueous acrylic acid polymer solution at least partly by adding a base, which results in release of a heat of neutralization, and concentrating the aqueous acrylic acid polymer solution by exploiting the heat of neutralization to give a highly concentrated acrylic acid polymer solution having a solids content of 60% to 80% by weight, (c) shaping and drying the highly concentrated acrylic acid polymer solution.
A process for preparing solid acrylic acid polymers comprising:
An at least partly neutralized, aqueous acrylic acid polymer solution having a solids content of 60% to 80% by weight and a viscosity of 300 to 6000 mPas at 90° C.
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