Alloy comprising polyolefin and thermoplastic polyurethane
a technology of thermoplastic polyurethane and alloy, which is applied in the field of alloy comprising polyurethane and polyolefin, can solve the problems of difficult to achieve a blend of thermoplastic polyurethane and other materials, including polyolefins, that retains all of the physical properties desired, and achieves stable and useful composition, improved compatibility of other blends of tpu, and better physical properties
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example 1
tion
[0098]TPU A is prepared by reactive extrusion. An aromatic diisocyanate, a 2000 molecular weight hydroxyl terminated polyether polyol, and a short chain glycol chain extender, are reacted in an extruder. A conventional additive package is also added to the extruder. The components are charged such that the chain extender to polyol molar ratio is about 1.5, the blend molecular weight is about 850, and the hard segment content of the resulting TPU is about 27.5%. TPU B is prepared by reactive extrusion and uses the same aromatic diisocyanate, hydroxyl terminated polyether polyol, and a short chain glycol chain extender as TPU A, except that the polyol is a 1000 molecular weight polyol. A conventional additive package is also added to the extruder. The components are charged such that the chain extender to polyol molar ratio is about 1.2, the blend molecular weight is about 495, and the hard segment content of the resulting TPU is about 40%.
[0099]TPU C is prepared by reactive extru...
example 2
[0105]Nucrel® 3990 is a copolymer of ethylene and acrylic acid with an acrylic acid content of 9 w / w % commercially available from DuPont also referred to as “Nucrel” below.
[0106]Escor™ 5000 and Escor™ 5100 are copolymers of ethylene and acrylic acid with an acrylic acid content of 6 w / w % and 11 w / w % respective commercially available from by ExxonMobil.
[0107]Flexirene® MS 40 A is a linear medium density polyethylene (LMDPE) commercially available from by Polimeri Europa.
[0108]Nucrel 0903HC is an ethylene-methacrylic acid copolymer resin, made with nominally 9.0 wt % methacrylic acid and supplied by DuPont.
[0109]Luca A3110M medium / high density polyethelene copolymer with 4% acrylic acid and 8% butyl acrylate and is supplied by LyondellBasell.
example 3
mation
[0110]This experiment describes the preparation of a blended composition in accordance with the present invention. Compositions were made containing either a sole ingredient of one of the invention blend components or a 60 / 40 w / w combination thereof.
[0111]The individual components were fed into a 16 mm co-rotating twin screw extruder with a 40:1 L / D ratio. The screw configuration contained a plasticizing zone and 3 mixing zones made from kneading elements. During compounding the screws ran with a speed of 200 rpm and with the following temperature profile:
° C.DieZone 8Zone 7Zone 6Zone 5Zone 4Zone 3Zone 2Zone 1FeedSetting17017018018018018018518500Actual17017018018017918018418412283
[0112]The polymer melts were extruded through a slit die of 1×45 mm and cooled down on chill rollers (temperature 10° C.).
[0113]The thermoplastic polyurethanes were dried prior to compounding accordingly to the recommendations stated by the manufactures. A HELIOS dry-air dryer was used. The polyolefin...
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Abstract
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