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Gloss polymer additive with reduced incidence of discoloration

A technology of polymers and additives, applied in the field of low-gloss polymer additives, can solve problems such as limiting the application of low-gloss polymer additives

Active Publication Date: 2021-01-29
SABIC GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This limits the application of this low gloss polymer additive, especially for forming natural color products
However, the source of the darkening discoloration is unknown

Method used

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  • Gloss polymer additive with reduced incidence of discoloration
  • Gloss polymer additive with reduced incidence of discoloration
  • Gloss polymer additive with reduced incidence of discoloration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] Embodiment 1 - for the comparison result of blackening discoloration occurrence rate

[0110] Materials and methods

[0111] For the data discussed in this paper, the following materials and methods were used. Table 1 describes the composition of the PCMAT low gloss polymer additives tested for manufacture:

[0112] Table 1

[0113]

[0114] Reactive extrusion of the combination of SAN, PC, ERL and DBSA components was performed using a 9 barrel zoned 58 mm co-rotating twin-screw extruder (ZSK58 Super Compounder; Coperion GmbH, Stuttgart, Germany).

[0115] The cutting tool used to cut the crosslinked mixture of SAN and PC components was a water ring pelletizer (control) or an underwater die face pelletizer (experiments according to the invention). The water ring pelletizer is a 6" Beringer horizontal hot face cutting water ring pelletizer (available from Nordson XALOY Incorporated, Hickory, NC) and the underwater pelletizer is an EUP 150 underwater pelletizing uni...

Embodiment 2

[0126] Example 2 - Effect of Temperature and Oxygen Content

[0127]A series of laboratory experiments were carried out to simulate the discoloration behavior of the low-gloss polymer additive PCMAT, which accumulates on the blades of cutting tools under different operating conditions, including temperature, air versus inert environment, and duration at high temperatures. The PCMAT pellets tested were produced from the ingredients described in Example 1, Table 1.

[0128] In the experiment, several PCMAT pellets were placed in a sealed heating chamber of a thermogravimetric analysis (TGA) apparatus (Hi-Res TGA2950, ​​TAInstruments, New Castle, DE), which can precisely control the temperature and provide normal air environment or inert (N 2 )environment. At 500°F (which represents the temperature typically observed at the screw die head of a conventional water ring pelletizer) and in an air environment (~21% oxygen), after 30 minutes of exposure to such temperature and oxygen...

Embodiment 3

[0129] Example 3 – Low Gloss

[0130] Prepared from the materials described in Example 1, Table 1, and processed the PCMAT product according to conventional methods (using a water ring granulator), and prepared from the materials described in Example 1, Table 1, and used The method of the present invention (using a cutting tool with reduced interface temperature and reduced exposure to oxygen, ie an underwater die face pelletizer) processes the second PCMAT product. Conventional and inventive PCMAT products were combined separately with PC / ABS polymer formulations and the resulting thermoplastics were evaluated for the ability of the respective PCMAT additives to reduce gloss. To account for processing differences, three separate samples of the PCMAT product of the invention were produced and combined with PC / ABS polymer formulations separately.

[0131] Materials and methods

[0132] The PC / ABS+PCMAT formulation was prepared using the components listed in Table 3:

[0133]...

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Abstract

Disclosed are methods of producing low gloss polymer additives having a reduced incidence of blackening and discoloration, low gloss polymer additives produced according to such methods, thermoplastic compositions comprising the low gloss polymer additives of the present invention, and thermoplastic compositions comprising such products of things. The low gloss polymer additive with reduced incidence of blackening and discoloration imparts a high quality, low gloss finish to end products, including natural color products.

Description

[0001] Cross-Referenced Related Applications [0002] This application claims priority to US Provisional Application 62 / 140,744, filed March 31, 2015, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to low gloss polymer additives for the production of thermoplastic polymers having low gloss. [0004] Background of the invention [0005] Thermoplastics with a low gloss finish are useful in the manufacture of articles and parts for a wide range of applications, including automotive parts, trim articles, electronic equipment housings, and siding for commercial or residential use. Low gloss finishes for plastic articles can be obtained using different methods. Mechanical texturing of plastic surfaces has long been used, but this type of surface finish is prone to abrasion and eventually gains gloss with use. Furthermore, mechanical texturing adds processing steps and increases manufacturing costs. Theref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L25/12C08L69/00C08L63/00C08K5/42
CPCC08L25/12C08L69/00C08L63/00C08K5/42C08J3/12C08J2369/00C08J2425/12C08J3/24C08J3/005C08L55/02C08K5/0025C08L25/06
Inventor 徐建华V·劳瑞陈晨
Owner SABIC GLOBAL TECH BV
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