Robin Conrad

Contact us

Robin Conrad

Contact us

KURARITY™ – The transparent TPE

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.

KURARITY™ in its pellet form


  • 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
Plastic modification with KURARITY™


  • Alternative to TPU
  • High tack (without tackifier or plasticizer)
  • Low hardness without plasticizer
  • Residual-free adhesives
  • No yellowing
  • High adhesion to polar resin
KURARITY™ can be used as light guides.


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

Grades of KURARITY™

Kuraray developed two families of KURARITY™ called LA-series and LK-series. LA-series utilizes a poly (n-butyl acrylate) mid-block while the LK-series utilizes a poly (n-butyl acrylate/2-ethylhexyl acrylate) mid-block. The grades are differentiated by low PMMA content to high PMMA content, from low molecular weight to high molecular weight and by their applications.

All grades of KURARITY™ show similar low temperature properties which result from Tg of poly (n-butyl acrylate) mid-block or poly (n-butyl acrylate/2-ethylhexyl acrylate) mid-block and heat resistance from Tg of PMMA.

When used as a modifier for various types of polar resins (PC, ABS, PBT, PC/ABS, PMMA, PVC, PLA), inks, coatings, adhesives and other compounds, KURARITY™ imparts special properties such as improved flow-ability, impact resistance, softness and polarity. This effect is different compared to general core-shell type impact modifiers.

LA-series has an n-butyl acrylate-based soft block.
LK-series has an n-butyl acrylate/2-ethylhexyl acrylate-based soft block.

Product Brochure

KURARITY™ – acrylic block copolymer

Technical insights

You can find more information about our products and applications in the R&D documentation.


I have read the privacy policy and, by clicking “submit”, agree to the use and electronic storage of my data I provide in the contact form.
By submitting this form, you agree that Kuraray Europe GmbH may process your data for marketing purposes. Your data will be shared within the Kuraray Group and its service providers. For more information about how we use your data, please refer to our privacy policy.
* Required