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High impact polystryene having high modulus and resistance to environmental stress cracking

A styrene and monovinyl aromatic technology, applied in the field of polymeric materials, can solve the problems of different effects of properties and properties

Active Publication Date: 2015-10-14
TRINSEO EURO GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these approaches have had different effects on other performance properties

Method used

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  • High impact polystryene having high modulus and resistance to environmental stress cracking
  • High impact polystryene having high modulus and resistance to environmental stress cracking
  • High impact polystryene having high modulus and resistance to environmental stress cracking

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Embodiment 2

[0079] Example 2 was prepared using sufficient polybutadiene rubber to yield a final rubber concentration of 6.6% by weight in the final composition. The styrene monomer is polymerized in the presence of rubber under dynamic conditions for controlling the size of the rubber particles after phase inversion as the polymerization proceeds. Polymerization of polystyrene yields monovinylaromatic polymer grafted to rubber particles and monovinylaromatic polymer not grafted to rubber particles. Early in the polymerization, no rubber particles are present and the rubber phase is the continuous phase. At this early time, polystyrene existed in particle form. At a later time, after phase inversion, the polystyrene becomes the continuous phase and the rubber phase exists as the discontinuous phase. About 2.7% by weight mineral oil is present in the rubber-modified monovinyl aromatic polymer, which is added prior to the polymerization of the styrene. The composition and properties of E...

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PUM

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Abstract

High impact polystyrenes and related monovinyl aromatic polymers generally have either a high modulus or good resistance to environmental stress cracking. The present invention is directed at polymeric materials having both a high modulus and good resistance to environmental stress cracking thus enabling the down gauging of parts, and or the use of the materials in new applications. The invention is predicated on the use of one or more, or even all of the following features: a high molecular weight matrix polymer, reduced concentration of elastomeric polymer, or methods that result in large rubber particle size.

Description

field of invention [0001] The present invention relates to polymeric materials having good resistance to environmental stress cracking. In particular, the present invention relates to polymeric materials with an improved balance of tensile properties and environmental stress crack resistance such that cost-effectiveness associated with gauge reduction can be achieved. Background of the invention [0002] Various approaches have been performed to provide rubber reinforced monovinyl aromatic polymers with good environmental stress crack resistance (ie good ESCR). These methods include using multilayer sheet technology, increasing the amount of rubber, increasing the volume of the gel phase, optimizing the rubber particle size, controlling the amount of rubber crosslinking, optimizing the process, using additives (such as polypropylene, polybutene and ethylene / α- olefin copolymers) and the use of high molecular weight rubber. Some of these methods and related techniques are d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F279/02C08L51/04
CPCC08F279/02C08F112/08C08L51/04C08L25/06C08L2205/06C08L2205/22
Inventor R·沃拉特G·鲍盖特M·G·沃雷斯R·梵德勒A·德布克
Owner TRINSEO EURO GMBH