Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Dow PARALOID K-400P Acrylic Processing Aid

Dow PARALOID K-400P is a high-performance acrylic processing aid from Dow’s PARALOID polymer series, designed to enhance melt strength, improve dispersion, and reduce extrusion defects in PVC and other thermoplastics—offering superior impact modification and processing efficiency without compromising clarity or thermal stability.
  • dow paraloid k 400p acrylic processing aid_ad4b0583
  • dow paraloid k 400p acrylic processing aid_ad4b0583

Features Of Dow PARALOID K-400P Acrylic Processing Aid

  1. Enhances melt strength and melt elasticity in rigid PVC extrusion processes.

  2. Improves surface gloss and reduces melt fracture at high extrusion speeds.

  3. Offers excellent thermal stability during long-term processing without discoloration.

  4. Provides good compatibility with PVC resins and common plasticizers.

  5. Delivers consistent dispersion and rapid incorporation in dry-blend formulations.

Typical Applications Of Dow PARALOID K-400P Acrylic Processing Aid

  1. Rigid PVC window profiles and door frames.

  2. PVC siding and cladding extrusions.

  3. PVC pipe and conduit manufacturing.

  4. Extruded PVC sheets and foamed board products.

  5. Compounding of heat-stable PVC compounds for construction applications.

Specifications Of Dow PARALOID K-400P Acrylic Processing Aid

Chemical TypeAcrylic copolymer (methyl methacrylate / ethyl acrylate)
Product FormFree-flowing white granules
AppearanceOff-white to light tan granules
Primary ApplicationsProcessing aid for rigid and semi-rigid PVC extrusion
Key FeaturesHigh melt strength enhancement, low volatility, excellent thermal stability
BenefitsReduces die lip buildup, improves output rates, enhances surface finish
Recommended Loading Range1.0–3.0 phr (parts per hundred resin)
Storage ConditionsStore in cool, dry place; protect from moisture and direct sunlight


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