SIS YH-1125H

SIS (Styrene-Isoprene-Styrene Block Copolymer) typically features a linear, radial (star), or mixed molecular structure. The radial structure often exhibits superior adhesive performance due to its more regular morphology. Combining the processing characteristics of thermoplastics with the elasticity of vulcanized rubber, SIS is widely used in hot melt pressure-sensitive adhesives (HMPSA), sealants, and modified bitumen for roofing waterproofing membranes.

SIS YH-1105 is a linear styrene-isoprene-styrene block copolymer with a styrene content of 15% and an SI content of 0%. It features a tensile strength of 13 MPa and a Shore A hardness of 41, providing a balanced mechanical profile within the SIS product range. Its volatile matter content is controlled at ≤0.7 wt%, and it is supplied as white fluffy particles.

SIS YH-1106 is a linear SIS copolymer containing 16% styrene and 17% SI, with a tensile strength of 10 MPa and a Shore A hardness of 40. Its melt flow rate reaches 11 g/10 min under a test condition of 200°C/5 kg, while the toluene solution viscosity is 900 mPa·s at 25°C. These parameters distinguish YH-1106 through its combination of moderate hardness, defined tensile strength, and relatively high melt flow. The grade has a volatile matter content of ≤0.7 wt% and is available in white fluffy particle form.

SIS YH-1209 is styrene - isoprene block copolymer in the form of white porous particle, with features of good thermo-plasticity, high elasticity, good melt fluidity, good compatibility with tackifying resin, safe and non-toxic. It delivers a tensile strength of 15 MPa and a Shore A hardness of 61, distinguishing it with a comparatively firm profile. It can be applied to the hot-melt pressure-sensitive adhesives, solvent cements, flexible printing plates, plastics and asphalt modification. 

SIS YH-1124 is a linear SIS grade with 14% styrene and 24% SI content. It has a tensile strength of 8 MPa and a Shore A hardness of 38,  maintains dependable initial tack and clean slitting properties. YH-1124 is in the form of white Fluffy particle, with features of good thermo-plasticity, high elasticity, good melt fluidity, good compatibility with tackifying resin, safe and non-toxic. 

SIS YH-1126 is a linear styrene-isoprene-styrene block copolymer characterized by a styrene content of 16% and an SI content of 50%. It has a tensile strength of 5 MPa and a Shore A hardness of 38, representing a relatively low-strength, soft grade. It has medium molecule weight and high diblock content, with good melt processability. 

SIS YH-4019 is a radial styrene-isoprene-styrene block copolymer containing 19% styrene and 30% SI. The high content of styrene provides it with higher cohesive strength, low viscosity, outstanding holding power, and excellent heat-resistance. It can be used to produce packaging bags, sanitation supplies, double-sided adhesive tapes and labels.

SIS YH-1125 is a radial  styrene/isoprene block copolymer. It formulated with 25% styrene content and 25% SI diblock fraction, characterized by a Shore A hardness of 54 and a tensile strength of 10 MPa. Demonstrating an MFR of 9 g/10min and a toluene solution viscosity of 500 Mpa.s, it offers high structural strength, balanced rubbery elasticity, and reliable chemical stability.

SIS YH-1128 is a highly fluid, linear styrene/isoprene block copolymer featuring a high melt flow rate of 23 g/10min and a moderate toluene solution viscosity of 600 Mpa.s, with 15% styrene and 38% SI diblock content. With a tensile strength of 12 MPa and Shore A hardness of 38, it ensures ultra-fast melt processing, superior pumping throughput, and excellent low-temperature ductility.

SIS YH-1125H is a high-styrene linear SIS grade incorporating 30% bound styrene and 25% SI diblock fraction, resulting in a high Shore A hardness of 60 and tensile strength of 13 MPa. With an MFR of 12 g/10min and a remarkably low solution viscosity of 250 Mpa.s, it yields high modulus, superior creep resistance, and low solution processing energy consumption.

SIS YH-1108 is a linear SIS polymer containing 16% bound styrene and 20% SI diblock content, presenting a Shore A hardness of 40 and a tensile strength of 10 MPa. Defined by an MFR of 13 g/10min and a toluene solution viscosity of 850 Mpa.s, it offers optimal melt rheological properties, smooth surface extrudability, and balanced elastic recovery.

SIS YH-4016 is a radial SIS block copolymer featuring an ultra-high SI diblock content of 75% and 18% styrene content, producing a highly fluid grade with an MFR of 23 g/10min and a toluene solution viscosity of 500 Mpa.s. It provides extreme molecular flexibility, excellent melt flowability, and exceptional tackifying compatibility.

SIS YH-4015 is a hybrid-structured styrene-isoprene-styrene (SIS) thermoplastic elastomer formulated with 15% bound styrene and 15% SI diblock fraction, it combines the structural benefits of linear and radial architectures for stable melt processing and high structural cohesive resistance.