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Extruder screw

A technology of extruder and machine screw, which is applied in the field of extruder screw system, and can solve problems such as complex equipment, complex polymerization reaction control, and limited diversity of thermoplastic resin aqueous dispersions.

Active Publication Date: 2012-10-17
UNION CARBIDE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This approach is accompanied by the disadvantage that a limited variety of polymerizable monomers can be used and thus the diversity of aqueous thermoplastic resin dispersions that can be prepared is limited
This method also suffers from the disadvantages of complex polymerization control and complex equipment.

Method used

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Examples

Experimental program
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Effect test

Embodiment approach

[0114] For various embodiments, the one or more stabilizers may help facilitate the formation of a stable high internal emulsion. For one or more embodiments, the one or more stabilizers may include one or more non-polymeric stabilizers or one or more polymeric stabilizers selected from a or more polar polymeric stabilizers, one or more non-polar polymeric stabilizers, and combinations thereof. For various embodiments, the stabilizer may be a polar polymer having polar groups as comonomers or grafted monomers. For example, the one or more stabilizers may include one or more polar polyolefins having polar groups as comonomers or grafted monomers. Examples of polymeric stabilizers include, but are not limited to, ethylene-acrylic acid (EAA) and ethylene-methacrylic acid copolymers, such as those available under the trade name PRIMACOR TM Commercially available from The Dow Chemical Company under the tradename NUCREL TM Commercially available from E.I. DuPont de Nemours and un...

Embodiment 1

[0136]Example 1 is an extruder system comprising an extruder screw system having a first extruder screw and a second extruder screw. Examples 2-3 are the first extruder screw and the second extruder screw. The screw configurations of the two extruders are similar. Example 1 included a ZSK-58 MegaCompounder manufactured by Coperion Werner & Pfleiderer with twelve 58mm ID extruder barrels and a 250hp drive mechanism. Examples 2-3 included screw segments mounted on multi-grooved shafts. Examples 2-3 are intermeshing and co-rotating at 1200 rpm. Screw segments are available from Coperion Werner & Pfleiderer. A conventional kneading block element 1 has 11 mm wide disks, with 5 disks per 60 mm screw segment. The data in Table 1A show Examples 1-3 and the properties of the extruder screw sections.

[0137] Example 1 includes a high internal phase emulsion (HIPE) region. The HIPE zone included Examples 4-16, each being a high internal phase emulsion section each with a kneading ...

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Abstract

Embodiments of the present disclosure include an extruder screw, (200 -1,200 -2) an extruder screw system (254) having a least one of a first extruder screw (200-1, 200-2) and at least one of a second extruder screw, (200-1, 200-2) an extruder system ( 250) having the extruder screw system (254), a continuous process for the production of an aqueous dispersion using the extruder system, and an aqueous dispersion formed by the process. For the various embodiments, the extruder screw (200-1, 200-2) includes a mixing and melting segment (266); a high internal phase emulsion segment (268) that includes a kneading block having a plurality of disks with surfaces that define a plurality of channels; a distributing and pumping segment (270); a first seal segment (272) between the mixing and melting segment (266) and the high internal phase emulsion segment (268); a second seal segment (274) between the high internal phase emulsion segment (268) and the distributing and pumping segment (270); and a third seal segment (276) at an end distal the distributing and pumping segment (270 ) relative the high internal phase emulsion segment (268).

Description

technical field [0001] The present invention relates to extruder screws, and in particular to extruder screw systems having extruder screws for forming aqueous dispersions. Background technique [0002] Aqueous dispersions of various thermoplastic resins are known in the art. Aqueous dispersions have been used in various fields because aqueous dispersions prepared by using water as their dispersion medium can be more efficient than those prepared by using organic solvents for the dispersion medium in terms of flammability, working environment, and / or handling convenience. The dispersion is more favorable. For example, when an aqueous dispersion is applied and dried on the surface of a substrate such as paper, fiber, wood, metal or plastic molded articles, the resulting coating can provide the substrate with water resistance, oil resistance, chemical resistance , corrosion resistance and / or heat sealability. [0003] Aqueous dispersions of thermoplastic resins have been pr...

Claims

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Application Information

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IPC IPC(8): B29C47/40B29C47/38B29C47/60B29C48/395B29C48/58B29C48/67
CPCB29C47/0871B29C2947/92628B29K2105/0005B29C2947/92219B29C47/38B29C47/402B29C47/0021B29C2947/92123B29C47/0825B29C2947/92104B29C47/0844B29C47/1063B29C2947/92695B29C2947/92704B29C47/1081B29C47/64B29C2947/92019B29C47/60B29C47/82B29C48/832B29C48/834B29C48/67B29C48/08B29C48/57B29C48/268B29C48/385B29C48/395B29C48/402B29C48/29B29C48/83B29C48/297B29C48/507B29C48/2564B29C2948/92019B29C2948/92104B29C2948/92123B29C2948/92219B29C2948/92628B29C2948/92695B29C2948/92704B29C48/58B29B7/421B29C48/505
Inventor A.C.纽鲍尔N.W.邓丘斯
Owner UNION CARBIDE CORP