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Ensinger PEI

Chevron Phillips K-Resin® XK41 Styrene-Butadiene Copolymer, Sheet Grade  (discontinued **)
Categories: Polymer; Thermoplastic; Styrene-Butadiene; Styrene-Butadiene Copolymer, SBC
Material Notes: Styrene-Butadiene Copolymer

Customer Benefits: XK41 is an extrusion grade of K-Resin SB copolymer designed specifically for improved performance in blends with general purpose polystyrene. It is easily processed by extrusion and gives thermoformed parts with excellent detail on fast production cycles. Compared to KR05, XK41 offers greater polystyrene acceptance with equivalent processability. Thermoformed parts have very good clarity, very good toughness, and good stiffness.

Applications: Major applications include thermoformed blister packs, cups and lids, and portion packages.

Processing Recommendations:
Melt Temperature: 218°C maximum. High shear and restrictive type screws tend to degrade the melt. Generally no need to dry resin.

Specification Data: When combined with at least 8% food grade polystyrene to produce articles for food contact, XK41 complies with FDA Regulation 21 CFR 177.1640.

Data provided by Chevron Phillips Chemical Company LP.

Ineos Styrolution acquired the K-Resin® product line from Chevron Phillips Chemical Company in 2016. This grade was previously discontinued.
Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesMetricEnglishComments
Density 1.01 g/cc0.0365 lb/in³ASTM D792
Melt Flow 7.5 g/10 min7.5 g/10 minCondition G; ASTM D1238
 
Mechanical PropertiesMetricEnglishComments
Hardness, Shore D 6161ASTM D2240
Tensile Strength, Yield 18.8 MPa2730 psi2 in per min; ASTM D638; Test specimens were injection molded by ASTM D1897.
Elongation at Break 251 %251 %2 in per min; ASTM D638; Test specimens were injection molded by ASTM D1897.
Flexural Yield Strength 29.5 MPa4280 psiTest specimens were injection molded by ASTM D1897; ASTM D790
Flexural Modulus 1.2075 GPa175.14 ksiTest specimens were injection molded by ASTM D1897; ASTM D790
Izod Impact, Notched 0.430 J/cm0.806 ft-lb/inASTM D256
Instrumented Impact Total Energy 28.2 J20.8 ft-lbASTM D3763
 
Thermal PropertiesMetricEnglishComments
Deflection Temperature at 1.8 MPa (264 psi) 52.0 °C126 °FASTM D648
Vicat Softening Point 69.0 °C156 °FASTM D1525
 
Optical PropertiesMetricEnglishComments
Transmission, Visible 89.3 %89.3 %
 
Processing PropertiesMetricEnglishComments
Processing Temperature <= 218 °C<= 424 °F
 
Compliance PropertiesMetricEnglishComments
FDA YesYes

**
Materials flagged as discontinued () are no longer part of the manufacturer’s standard product line according to our latest information. These materials may be available by special order, in distribution inventory, or reinstated as an active product. Data sheets from materials that are no longer available remain in MatWeb to assist users in finding replacement materials.

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Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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PCHEVK85 / 20290

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