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Resinous composition with improved resistance to plate-out formation, and method

A composition, thermoplastic resin technology, applied in the direction of chemical recycling, etc., can solve problems such as changing gloss

Inactive Publication Date: 2007-11-14
SABIC INNOVATIVE PLASTICS IP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, this friction can change the gloss at multiple points across the width of the extrudate, as the contact between the collimator surface and the polymer melt is not uniform across that same width

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-2 and comparative example 1-2

[0046] The components were compounded and then coextruded as cap layers on PVC profile extrusion test pieces. The test pieces were evaluated for fouling and gloss properties and the results are shown in the table. The constituent components are shown in Table 1. ASA is a copolymer comprising structural units derived from 37.5 wt% styrene, 18 wt% acrylonitrile, and approximately 44.5 wt% butyl acrylate. The types of SAN used are SAN-1, SAN-2, and SAN-3. SAN-1 is a copolymer containing 75wt% styrene and 25wt% acrylonitrile; SAN-2 is a copolymer containing 72wt% styrene and 28wt% acrylonitrile, with a weight average molecular weight (Mw) of about 100,000, obtained by bulk polymerization Process Preparation; SAN-3 is a copolymer containing 72 wt% styrene and 28 wt% acrylonitrile, having a Mw of about 160,000 to about 180,000, prepared by a bulk polymerization method. All compositions included 1 phr of ethylene bisstearamide (EBS) wax and 1.4 phr of a mixture of hindered phenoli...

Embodiment 3-6 and comparative example 3

[0051] The components were compounded and then coextruded as cap layers on PVC profile extrusion test pieces. The test pieces were evaluated for fouling and gloss properties and the results are shown in the table. The constituent components are shown in Table 2. All compositions included 1 phr of EBS wax and 1.4 phr of a mixture of hindered phenolic antioxidants, UV absorbers and phosphorus-containing stabilizers (hereinafter referred to as additives). MMA-ASA is a copolymer containing structural units derived from about 11 wt% methyl methacrylate, about 30 wt% styrene, about 14 wt% acrylonitrile, and about 45 wt% butyl acrylate. MMA-SAN is a copolymer containing structural units derived from 35 wt% methyl methacrylate, 40 wt% styrene and 25 wt% acrylonitrile prepared by bulk polymerization. The mixture of fatty acid metal salts and amides was STRUKTOL TR251, a proprietary composition obtained from Struktol Company of America. Molded test pieces were also prepared from the ...

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PUM

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Abstract

Disclosed are compositions comprising: (i) a rubber modified thermoplastic resin comprising a discontinuous elastomeric phase dispersed in a rigid thermoplastic phase, wherein at least a portion of the rigid thermoplastic phase is grafted to the elastomeric phase; (ii) at least two additives selected from the group consisting of glass beads; fluoropolymers; ethylene bis-stearamide; a mixture of at least one metal salt of a fatty acid and at least one amide; a homopolymer comprising structural units derived from at least one (C1-C12)alkyl(meth)acrylate monomer; and mixtures thereof; and optionally (iii) at least one additive selected from the group consisting of a silicone oil and a linear low density polyethylene; wherein said composition has a critical shear rate value of greater than about 50 reciprocal seconds as measured at 190 DEG C. in a capillary rheometer with 10 mm length and 1 mm diameter. In other embodiments the present invention comprises a method to reduce or eliminate plate-out formation in compositions comprising rubber modified thermoplastic resins. In still other embodiments the present invention comprises articles made from said compositions.

Description

technical field [0001] The present invention relates to resin compositions exhibiting improved resistance to plate-out formation during processing. In particular embodiments, the present invention is directed to compositions comprising a rubber-modified thermoplastic resin comprising a dispersed A discontinuous elastomeric phase in the rigid thermoplastic phase, wherein at least a portion of the rigid thermoplastic phase is grafted to the elastomeric phase. Background technique [0002] Acrylonitrile-styrene-acrylate (ASA) graft copolymers typically exhibit severe fouling and gloss line surface problems when used in applications requiring extrusion processing. Examples of such extrusion methods include extrusion of profiles, sheets, pipes, or other similar methods, which are often provided with a vacuum calibrator to keep the dimensions of the extrudate precise. The vacuum of the calibrator applied can significantly affect the fouling and gloss line of the extrudate. In s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/04C08K3/00C08F265/04C08L55/02
CPCC08L55/02C08F265/04C08L51/04Y02P20/582C08L2666/24C08L2666/04C08L2666/02C08K3/00
Inventor S·达万S·K·加佳P·B·孙S·彭W·商C·H·J·克维茨
Owner SABIC INNOVATIVE PLASTICS IP BV
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