Kaneka B-31 Impact Modifier

Features Of Kaneka B-31 Impact Modifier

1. MBS core-shell structure: Impact strength is 10.1kg·cm/cm at 23℃ with 14phr addition, stable impact performance

2. Good transparency: Light transmittance of 79.3% and haze of 4.0%, maintaining the transparent texture of PVC substrate

3. Balanced color difference: L value 83.1, b value 7.1, ensuring good appearance consistency of products

4. Excellent whitening resistance: L value 27.2, low whitening after bending, suitable for bending scenarios

5. Strong processing adaptability: Compatible with conventional PVC processing processes such as two-roll mixing and press molding

Typical Applications Of Kaneka B-31 Impact Modifier

1. Impact modification of transparent PVC films and sheets, such as general packaging films and stationery sheets

2. Transparent PVC injection molded products with medium to low impact requirements, such as storage boxes and decorative accessories

3. Toughening of transparent PVC hoses and profiles, such as household drain pipes and decorative lines

4. Transparent PVC daily necessities with high requirements for appearance consistency, such as fresh-keeping boxes and transparent containers

5. Indoor transparent PVC products, such as display boxes and desktop storage pieces

Specifications Of Kaneka B-31 Impact Modifier

Kaneka B-31 Impact Modifier – Frequently Asked Questions (FAQ)

Q1: What is Kaneka B-31 and how does it function in polymer systems?

A: Kaneka B-31 is a reactive acrylic impact modifier designed to enhance toughness and ductility in rigid thermoplastic matrices—particularly polyvinyl chloride (PVC) and certain engineering plastics. It functions by forming a finely dispersed, elastomeric phase that absorbs and dissipates mechanical energy upon impact, thereby improving resistance to cracking and brittle failure without significantly compromising stiffness or processability.

Q2: Is Kaneka B-31 compatible with unplasticized PVC (uPVC) compounds used in construction profiles?

A: Yes, Kaneka B-31 is widely used in uPVC formulations for window profiles, pipes, and siding. Its reactive nature promotes strong interfacial adhesion with the PVC matrix, supporting excellent long-term weathering performance and maintaining impact strength retention after thermal aging and UV exposure.

Q3: How is Kaneka B-31 typically incorporated into compound formulations?

A: Kaneka B-31 is added during the dry-blending or high-speed mixing stage, prior to extrusion or calendering. It disperses readily under standard PVC compounding conditions and does not require pre-dissolution or special handling. Dosage depends on formulation requirements but generally ranges from 0.1% to 2% by weight relative to the base polymer.

Q4: Does Kaneka B-31 affect the thermal stability or color development of PVC compounds?

A: Kaneka B-31 exhibits good thermal stability under typical PVC processing temperatures and does not contribute to premature discoloration. When used within recommended dosage levels and combined with appropriate stabilizer systems, it supports consistent color hold and minimal yellowing during melt processing and subsequent service life.