Alcogum L-237 Latex National Starch and Chemical-Alco Chemical Rheology Modifiers / Thickeners >> Alkali-Soluble (associative) ADHESIVE ALCOGUM™ polymers are pre-activated high molecular weight rheology modifiers used to viscosify a wide range of adhesive compounds. ALCOGUM thickeners provide stable viscosity over a broad pH range and are resistant to biological degradation. ALCOGUM™ L-200 Series thickeners comprise an evolving family of products designed by Alco Chemical to meet rheology and water retention requirements for the paper and paperboard industries. These highly effective, high molecular weight polymeric thickeners allow formulators to increase the level of water retention and select the optimal low and high shear flow properties to optimize machine productivity and finished sheet quality. The ALCOGUM™ L-200 Series meets today’s demanding coating trends. These trends include: Higher coater speeds requiring improved high shear rheology to maximize machine efficiency. LWC requiring controlled coating immobilization and structuring properties. Increased coating grade differentiation calling for a broader range of performance properties from a rheology modifier. Changes in equipment and automated coating kitchens affecting requirements and use of viscosifiers. Increased use of film presses and metering size presses as LWC/ULWC coaters The ALCOGUM™ L-200 Series are available in several grades. Products may be selected with different levels and types of hydrophobic substitutions. Substituted polymers, referred to as associative thickeners, allow the formulator to select the combination of water retention, viscosity, and flow properties that maximize the operation’s productivity. ALCOGUM L-237 is a member of the ALCOGUM L-200 Series of thickeners. This product group utilizes a proprietary emulsification system which provides excellent mechanical shear and freeze-thaw stability to the emulsion. These emulsions have enhanced compatibility characteristics with typical coating raw materials which simplifies addition and mixing techniques. ALCOGUM L-237 is an alkali soluble viscosifier of the type commonly referred to as an in-situ thickener. It is supplied as a stable anionic latex emulsion at pH 4.5 - 5.5. ALCOGUM L-237 was developed for use in paper coating formulations that require additional water retention without significant increases in low and high shear viscosity for better coater runnability. This product allows the formulator to increase water retention in his formulation and adjust Brookfield and Hercules high shear viscosities to maximize machine efficiency. ALCOGUM L-237 helps control coating placement and the improvement of printing properties. Alkali soluble in-situ thickener. Stable anionic latex emulsion. Used in adhesive compounds. Possesses very good mechanical shear and freeze-thaw stability. Offers medium Brookfield viscosity, high Hercules viscosity and medium water retention. Permits to increase the level of water retention and select the optimal low and high shear flow properties. Provides stable viscosity over a broad pH range and resistance to biological degradation.