Flexible acrylic block copolymer featuring excellent clarity and weatherability
KURARITY™
- General name
- Acrylic block copolymer (MAM)
- Sales format
- Pellets/high-viscosity liquid polymer
- Examples
-
KURARITY™ is a new series of acrylic block copolymers produced using Kuraray’s unique anionic living polymerization technology which combines various (meth)acrylates into AB or ABA type block copolymers. Due to its structure, KURARITY™ exhibits a variety of properties such as excellent clarity, weather resistance, self-adhesion, and good compatibility with other polar materials. Applications include adhesives, molded goods, light guides, plastics modifier and additives.
Applications
Adhesive
Adhesives for surface protection films, industrial tapes, labels. Spray adhesives, hot melts, solvent- based adhesives.
Molded parts
Automotive interior lighting, light guides, illuminations, smartphone cases, automotive interior components
Plastics modifier and additive
For polar plastics (PMMA, PLA, ABS, AS, PVC, PVDF, TPU, PC, PBT, POM, etc.), adhesives, inks, paints
Characteristics
Self-adhesive
Functional group/acid-free
Excellent clarity
Extremely low residual monomers or oligomers
Ultimately less odor
Excellent weatherability and no concerns about hydrolysis degradation
High-gloss, comparable with PMMA
Excellent flexibility, without plasticizers
Excellent injection/extrusion moldability
Good compatibility with polar plastics
Standard grades and properties
| Measurement method/conditions | Unit | LA3320 | LA2330 | LA2250 | LA2270 | LA4285 | |
|---|---|---|---|---|---|---|---|
| Hardness | ISO 7619-1 (Type A) | (-) | 13 | 32 | 65 | 71 | 95 |
| ISO 7619-1(Type D) | (-) | < 5 | < 5 | 18 | 23 | 46 | |
| Specific gravity | ISO 1183 | (-) | 1.06 | 1.08 | 1.08 | 1.10 | 1.11 |
| MFR | ISO 1133 [190ºC 2.16kg] | (g/10min) | 6.2 | 3.7 | 25 | 4.4 | 1.5 |
| ISO 1133 [230ºC 2.16kg] | (g/10min) | 63 | 42 | 330 | 80 | 31 | |
| Modulus at 100% | ISO 37 | (MPa) | 0.4 | 0.3 | 3.7 | 9.0 | 19 |
| Tensile strength | ISO 37 | (MPa) | 3.6 | 7.2 | 9.0 | 12 | 19 |
| ISO 527-2 | (MPa) | - | - | - | - | 19 | |
| Tensile elongation | ISO 37 | ()%) | 540 | 490 | 380 | 149 | 140 |
| ISO 527-2 | (%) | - | - | - | - | 90 | |
| Young’s modulus in flexure | ISO 178 | (MPa) | - | - | - | - | 650 |
| Charpy impact | ISO 179-1 (Notched: 1eA) | (kJ/m2) | NB | NB | NB | NB | 28 |
| Transmittance | ISO 13468-1 [3mm thick] | (%) | 92 | 91< | 91< | 93 | 91< |
| Haze | ISO 14782 [3mm thick] | (%) | 2.0-6.01 | 2.0-6.01 | 2.0-6.01 | < 1.0 | < 2.0 |
| Suitable applications | Adhesive | ○ | ○ | ○ | |||
| Molding material | ○2 | ○2 | ○ | ||||
| Modifier and additive | ○2 | ○2 | ○2 | ○2 | ○ |
Notes 1: The haze value is normally worse due to the anti-blocking agents dusted onto pellets.
2: These grades can block or bridge while feeding into the extruder.
The above figures should be regarded as guide values only and not as binding minimum values. (Tested by Kuraray)
Catalogues/technical data
Related website
Contact us
Click here for inquires (KURARITY™)- KURARITY Business Promotion Department,
Elastomer Division
Kuraray Co., Ltd. - Tokiwabashi Tower, 2-6-4, Otemachi, Chiyoda-ku, Tokyo, 100-0004, Japan
Tel.: +81-3-6701-1593
E-mail: Kuraray.Kurarity@kuraray.com
