Sugar-Coated Solid Forms Mannitol Stearic Acid Stability

The patent combines mannitol with hydrocolloid binders (guar gum, xanthan gum, locust bean gum, or starch) to create a composite coating composition. This composite approach allows the coating to achieve adequate adhesion and film formation at lower dry material contents (5-50% w/w) while maintaining the humidity resistance properties of mannitol, resolving the contradiction between humidity protection and coating formation capability.

The patent changes the concentration parameter of dry material content in the coating syrup to a lower range (5-50% w/w) and combines it with hydrocolloid binders that provide adequate film formation at these lower concentrations. This parameter change allows the coating to be applied and dried at lower temperatures that do not degrade thermolabile active ingredients, while still achieving stable and adherent coating layers.

The patent introduces hydrocolloid binders (guar gum, xanthan gum, locust bean gum, or starch) as intermediary substances that mediate between the crystallizable material (mannitol) and the core surface. These binders form a adhesive matrix that prevents core sticking during coating and reduces erosion, while still allowing crystallization of mannitol to occur and provide the desired coating structure and humidity resistance.

The patent replaces the permanent, complex formulation requirement of titanium dioxide with a temporary aesthetic solution: inherent white pigmentation from the core material itself or from the hydrocolloid binders used in the coating. This eliminates the need for additional pigment additives and simplifies the formulation while maintaining acceptable appearance during the product's shelf life, applying the principle of using simpler, shorter-lived aesthetic solutions when permanent solutions are unnecessarily complex.