Product Information

Rubber elasticity, plastic moldability and damping performance

Chemicals/Elastomers/Rubber Isoprene Derivatives

SEPTON™ and HYBRAR™

General name
Hydrogenated styrenic thermoplastic elastomers
Sales format
Pellet/powder
Examples

SEPTON™
SEPTON™ is a styrenic thermoplastic elastomer developed by Kuraray. It is a block copolymer that consists of styrene-based hard-blocks and a diene soft block. SEPTON™ is used in a variety of TPE compounds. SEPTON™ can be processed in a wide variety of forms, including consumer goods, soft touch grips and automotive components.

HYBRAR™
HYBRAR™ is a triblock co-polymer with polystyrene end blocks and a vinyl bonded rich polydiene mid-block. HYBRAR™ exhibits high vibration damping and shock absorption properties. HYBRAR™ can be processed in a wide variety of forms, including films, tubes and injection molding.

Applications

SEPTON™

TPE compounds
Adhesives, coatings and sealants
Wires, cable skin material
Automotive parts
Fabrics, nonwoven materials
Plastics modifiers, compatibilizers
Medical parts
Toys, sporting goods
Elastic film
Electronic parts
Soft touch applications, grips
Gels
Packaging materials

HYBRAR™

Sporting goods
Damping and noise absorbing components
Household appliances
Automotive parts
Medical parts (films, sheets, tubes)
Pressure-sensitive adhesives, coating agents, sealing materials
Extrusion molded products
Flooring
Shoe components
Soft touch goods
Foam damping materials

Characteristics

SEPTON™

Thermoplastic rubber that possesses high elasticity, high strength, weather resistance, low temperature properties, chemical resistance (acid, alkali, alcohol), heat aging resistance, and electrical property (insulation). It is also recyclable.

HYBRAR™

Delivers robust damping performance at room temperature and has an affinity with polyolefin and polystyrene.

Thermoplastic with excellent moldability.
Can be cross-linked similar to rubber.
Possesses rubber elasticity similar to vulcanized rubber.
Hydrogenated grade (7000 series) provides excellent transparency as a polypropylene blend.

Offers excellent weather resistance and heat resistance.

Can be used as a soft compound that does not include a plasticizing agent.

Standard grades and properties

SEPTON™ grades

Grade Type Styrene content MFR Solution viscosity
(Toluene Solution 30ºC)
Physical form Hardness
(Type A)
230ºC, 2.16 kg
(g/10min)
200ºC, 10kg
(g/10min)
5wt%
(mPa•s)
10wt%
(mPa•s)
15wt%
(mPa•s)
1020 SEP 36 - 1.8 - 42 - Powder 70

SEPTON™ 1000 series is a di-block type with excellent transparency and flow ability. Mainly used as an adhesive, sealing material, automotive part, wire cable filling agent and unsaturated polyester modifier.

Grade Type Styrene content MFR Solution viscosity
(Toluene Solution 30ºC)
Physical form Hardness
(Type A)
230ºC, 2.16 kg
(g/10min)
200ºC, 10kg
(g/10min)
5wt%
(mPa•s)
10wt%
(mPa•s)
15wt%
(mPa•s)
2002 SEPS 30 70 100 - - 25 Pellet 80
2004F SEPS 18 5 - - - 145 Pellet 67
2005 SEPS 20 No flow No flow 40 1700 - Powder -
2006 SEPS 35 No flow No flow 27 1220 - Powder -
2063 SEPS 13 7 22 - 29 140 Pellet 36
2104 SEPS 65 0.4 22 - - 23 Pellet 98

The SEPS structure generally does not crystallize and exhibits excellent tensile elongation and low temperature properties. The SEPTON™ 2000 series features a variety of hard grades for use in many areas including personal care products, medical products, automotive parts, films and adhesives.

Grade Type Styrene content MFR Solution viscosity
(Toluene Solution 30ºC)
Physical form Hardness
(Type A)
230ºC, 2.16 kg
(g/10min)
200ºC, 10kg
(g/10min)
5wt%
(mPa•s)
10wt%
(mPa•s)
15wt%
(mPa•s)
4033 SEEPS 30 <0.1 <0.1 - 50 390 Powder 76
4044 SEEPS 32 No flow No flow 22 460 - Powder -
4055 SEEPS 30 No flow No flow 90 5800 - Powder -
4077 SEEPS 30 No flow No flow 300 - - Powder -
4099 SEEPS 30 No flow No flow 670 - - Powder -

The SEPTON™ 4000 series (SEEPS) series (SEEPS) offers better tensile strength, oil retention and PE compatibility than SEBS.

Additionally, the SEPTON™ 4000 series features a variety of molecular weight grades. The high molecular weight version provides robust tensile strength and compression set. Used in many applications including gels, films and automotive parts.

Grade Type Styrene content MFR Solution viscosity
(Toluene Solution 30ºC)
Physical form Hardness
(Type A)
230ºC, 2.16 kg
(g/10min)
200ºC, 10kg
(g/10min)
5wt%
(mPa•s)
10wt%
(mPa•s)
15wt%
(mPa•s)
8004 SEBS 31 <0.1 <0.1 - 40 - Powder 80
8006 SEBS 33 No flow No flow 42 - - Powder -
8007L SEBS 30 2.0 - - 20 - Pellet 77

The SEPTON™ 8000 series (hydrogenated SEBS type) possesses appropriate tensile strength and is used in adhesives, automotive parts, personal care products and more.

Grade Type Styrene content MFR Solution viscosity
(Toluene Solution 30ºC)
Physical form Hardness
(Type A)
230ºC, 2.16 kg
(g/10min)
200ºC, 10kg
(g/10min)
5wt%
(mPa•s)
10wt%
(mPa•s)
15wt%
(mPa•s)
HG252 SEEPS-
OH
28 26 - - - 70 Pellet 80

SEPTON™ HG252 features a hydroxyl group on one end and is used as a polar resin modifier and a polar/non-polar resin compatibilizer.

HYBRAR™ grades

Non-hydrogenated grades

Grade Type Styrene content Tg MFR Solution viscosity
(Toluene solution 30ºC)
Physical form Hardness
(Type A)
190ºC, 2.16 kg
(g/10min)
230ºC, 2.16kg
(g/10min)
15wt%
(mPa•s)
20wt%
(mPa•s)
30wt%
(mPa•s)
5125 Vinyl-bond rich SIS 20 -13 4 - - 100 650 Pellet 60
5127 Vinyl-bond rich SIS 20 8 5 - - - 540 Pellet 84

HYBRAR™ is a proprietary block copolymer that consists of a polystyrene hard block and vinyl-polydiene soft block.
It exhibits high damping performance at room temperature because its glass transition temperature falls in this range.

Taking advantage of this damping performance, it is used in damping foam sealants and sports products. Other potential applications are electronic parts, building materials, household appliances, automotive parts, adhesives, coating agents and sealing materials.

Hydrogenated grades

Grade Type Styrene content Tg MFR Solution viscosity
(Toluene solution 30ºC)
Physical form Hardness
(Type A)
190ºC, 2.16 kg
(g/10min)
230ºC, 2.16kg
(g/10min)
15wt%
(mPa•s)
20wt%
(mPa•s)
30wt%
(mPa•s)
7125F Vinyl-bond rich SEPS 20 -15 0.7 4 - 55 350 Pellet 64
7311F Vinyl-bond rich SEEPS 12 -32 0.5 2 90 240 - Pellet 41

HYBRAR™ features hydrogenated grades (7000 series) and non-hydrogenated grades (5000 series). In particular, the hydrogenated grades provide excellent heat resistance and weather resistance. HYBRAR™ has good compatibility with polypropylene, and related blends offer excellent transparency with good flexibility.It is used in films, sheets, tubes, and other products as an environmentally friendly softener material without the need for a plasticizer, in contrast to soft PVC.

Catalogues/technical data

Related website

Contact us

Click here for inquires (SEPTON™ and HYBRAR™)
Septon Sales Promotion and Planning Department, Elastomer Division
Ote Center Building, 1-1-3, Otemachi, Chiyoda-ku, Tokyo 100-8115, Japan
Tel.: +81-3-6701-1601
E-mail: elastomer.info@kuraray.com