KURARITY™ is a series of acrylic block copolymers that are produced using Kuraray’s unique anionic living polymerization technology, which combines various (meth)acrylates into A-B or A-B-A type block copolymers. This controlled polymerization process enables KURARITY™ to remain exceptionally transparent and clean with minimal residual monomer or oligomer compared to conventional acrylic polymers that are produced using radical polymerization. KURARITY™ is also referred to as MAM (Methyl-methacrylate-Acrylate-Methyl-methacrylate), it consists of methyl methacrylate hard-blocks (PMMA-blocks) and an acrylic based soft-block (a PnBA-block or a P(nBA/2EHA)-block).
Due to its structure, KURARITY™ exhibits a variety of properties such as excellent transparency, weather resistance, self-adhesion and good compatibility with other polar materials. The acrylic-based block copolymer can be processed into a wide variety of applications, such as adhesives, coatings and sealants, 3D printing or light guides (especially in the mobility sector and home appliances). KURARITY™ can be used as an additive to modify polar plastics and is ready to use for injection and extrusion applications.

Features

• Self-adhesive
• Functional group / acid-free
• Excellent transparency
• Extremely low residual monomers or oligomers
• Less odor
• Excellent weatherability
• No hydrolysis degradation
• High-gloss, comparable with PMMA
• Excellent flexibility, without plasticizers
• Excellent injection / extrusion moldability
• Good compatibility with polar plastics

Benefits

• Alternative to TPU
• High tack (without tackifier or plasticizer)
• Low hardness without plasticizer
• Residual-free adhesives
• No yellowing
• High adhesion to polar resin

Applications:

• Adhesives, coatings, sealants
• Compounding
• Polymer modification
• Consumer goods
• Mobility
• Sporting goods & footwear
• 3D printing

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