Synthetic Hydrotalcite (Layered Double Hydroxide / LDH) is artificially synthesized layered double‑hydroxide inorganic powder. After controlled surface modification treatment, the powder obtains improved dispersion and compatibility within PVC resin matrix. Relying on unique anion‑exchange capacity of its layered crystal structure, this product traps hydrogen chloride liberated by PVC under high‑temperature shear. It serves as stabilizer co‑aid and acid scavenger for lead‑free Ca‑Zn stabilized P

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Product DetailsThis surface‑modified synthetic hydrotalcite is manufactured by liquid‑phase co‑precipitation crystallization under precisely controlled reaction conditions. The formed slurry goes through filtration, repeated washing to reduce soluble salt impurities, drying and fine milling. Subsequent surface modification treatment is implemented on powder particles to adjust the surface property of hydrotalcite crystals.

Unmodified hydrotalcite is hydrophilic. When directly compounded into PVC formulations, poor compatibility with PVC resin may cause uneven powder dispersion, surface speckles on extruded products, and partial moisture‑related defects during high‑temperature processing. The surface‑modification procedure improves the organophilic property of hydrotalcite particles, enhances free‑flowing performance of the powder and promotes homogeneous mixing during high‑speed hot mixing of PVC compounds.

The regular layered crystal structure provides excellent anion‑exchange capability. During extrusion, calendering or injection molding of PVC, thermal degradation of polyvinyl chloride molecular chains continuously releases hydrogen chloride. Free hydrogen chloride will further accelerate autocatalytic decomposition of PVC. The hydrotalcite interlayer captures HCl anions through ion‑exchange reaction, which effectively interrupts the autocatalytic degradation cycle. When combined with calcium‑zinc stabilizer, it delivers remarkable synergistic stabilizing effect. It suppresses early yellow discoloration and significantly prolongs long‑term thermal stability of molten PVC.

This product features low soluble salt content, narrow particle‑size distribution and low heavy‑metal impurities. It does not negatively influence transparency within reasonable dosage range. It also improves weather‑resistance of outdoor‑grade PVC products. It helps formulating engineers to reduce the consumption of other expensive thermal‑stabilizer components, optimizing overall formulation costs for lead‑free PVC systems.

Typical application fields include rigid PVC building profiles, PVC water supply and drainage pipes, decorative sheets, PVC wire and cable insulation compounds, and injection‑molded PVC fittings for environmental‑friendly plastic products.

Packaging specification is 25 kg moisture‑proof woven bags with inner polyethylene liner. Keep packages tightly sealed in transportation and warehouse storage. Store in cool, dry indoor warehouse to avoid moisture absorption and powder caking. Do not stack pallets excessively high to prevent bag rupture. Wear dust‑proof masks and protective gloves during powder‑handling operations.

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Synthetic Hydrotalcite (Layered Double Hydroxide / LDH) CAS 11097-59-9, Surface-Modified PVC Stabilizer Co-Aid and Acid Scavenger

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Jishengya Technology

Shenzhen Jishengya Technology Co., Ltd. is located in Shenzhen, a special economic zone, and is a comprehensive technology enterprise integrating independent R&D, production and sales.