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Polypropylene random copolymer composition for cold and hot water pipe applications

A polypropylene polymer, random copolymer technology, applied in the direction of pipeline connection layout, pipe/pipe joint/pipe fittings, mechanical equipment, etc., can solve the problems of adverse effects of other characteristics

Pending Publication Date: 2021-06-08
WR GRACE & CO CONN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the past, when steps were taken to increase one of the above characteristics, the other characteristics were adversely affected

Method used

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  • Polypropylene random copolymer composition for cold and hot water pipe applications
  • Polypropylene random copolymer composition for cold and hot water pipe applications
  • Polypropylene random copolymer composition for cold and hot water pipe applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0168] The following examples demonstrate that the physical properties of polymer compositions prepared according to the present disclosure are improved compared to polymer compositions that do not contain property enhancers.

[0169] Polypropylene and ethylene random copolymers were polymerized in a reactor using the non-phthalate catalyst described above. Polymerization is performed using a single reactor to produce unimodal polypropylene random copolymers.

[0170]Produce samples of polymer pellets that are injection molded into specimens. An additive package was added to the polymer, the additive package comprising 3000 ppm of pentaerythritol tetrakis (3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate); 1500 ppm of tris(2,4-di-tert butylphenyl)phosphite; 300ppm calcium stearate; and 3000ppm 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl base) benzene. Specimens were prepared according to ASTM test D4101 to produce specimens for flexural and Izod impact test...

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Abstract

Polypropylene polymer compositions are disclosed that can be used to produce different types of molded articles, such as extruded piping structures. The polypropylene polymer composition contains a polypropylene random copolymer in combination with a property enhancing agent. The property enhancing agent is incorporated into the polymer composition so that the composition has relatively high impact resistance properties in combination with a relatively high flexural modulus.

Description

[0001] related application [0002] This application is based upon and claims priority to U.S. Provisional Patent Application Serial No. 62 / 752,008, filed October 29, 2018, and U.S. Provisional Patent Application Serial No. 62 / 751,290, filed October 26, 2018, both of which Incorporated herein by reference. Background technique [0003] Polymeric materials are often used in pipelines for various purposes, such as fluid transport (ie transport of liquids or gases such as water or natural gas) in which the fluid may be pressurized. In addition, the fluids delivered can have varying temperatures, typically in the temperature range of about 0°C to about 90°C. [0004] Hot water pipes made of polymer materials are one polymer pipe with outstanding problems due to higher temperatures. Hot water polymer piping must not only meet the requirements required by other common polymer piping such as cold water piping, but additionally must withstand the strains associated with higher tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08K5/092C08K5/098C08K5/20C08K3/26C08K3/34C08K5/1575C08K5/527F16L47/32
CPCC08L23/16C08K5/098C08K5/523C08K5/053C08K5/20C08K5/42C08K5/092C08K3/26C08K3/346C08K5/1345C08K5/526C08L23/14C08L23/145C08K5/521C08K5/1575B29C48/09C08L2203/18B29C48/022
Inventor J·M·雷戈米歇尔·倪·潘恩马治儒
Owner WR GRACE & CO CONN