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METHOD OF REMOVING POLYISOBUTYLENE FROM A CONTAINER

IP.com Disclosure Number: IPCOM000202245D
Publication Date: 2010-Dec-10

Publishing Venue

The IP.com Prior Art Database

Abstract

Polyisobutylene (PIB) is removed from a container that has a body which defines an orifice. The container also has a polyamide liner that contains the PIB and that is disposed within the body. The PIB is removed from the container using a method that includes the steps of providing the container and injecting air through the orifice to remove the PIB from the container. The container is included in a PIB removal system that also includes a source of compressed air fluidly connected to the container for injecting the compressed air through the orifice.

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METHOD OF REMOVING POLYISOBUTYLENE FROM A CONTAINER

[001]The present invention generally relates to a method of removing polyisobutylene from a container. More specifically, the present invention relates injects air into the container to remove the polyisobutylene therefrom.
[002]Polyisobutylene (PIB) is a thermoplastic and is also categorized in the polymer industry as a synthetic rubber or elastomer. PIB is also extremely tacky and viscous and, as a result, is typically difficult to handle and process efficiently. When PIB is prepared, it is typically heated to temperatures in excess of 150°C to increase packaging and shipping efficiencies. At these temperatures, the PIB cannot be packaged in traditional materials such as polyethylene (PE) and polypropylene (PP) because PE and PP melt and degrade at much lower temperatures. For this reason, PIB is typically packaged in nylon which can withstand high heat.
[003]Traditionally, extremely viscous thermoplastics are removed from PE and PP packing materials used in conjunction with rubber processing machines such as kneaders, roll mills, calendars, single and twin-screw extruders, extrusion presses, and/or mixers. These machines tear apart the PE and PP packing materials and prepare the thermoplastics for further use. As the PE and PP packing materials are torn apart, heat is generated such that the materials melt and lubricate the thermoplastics. However, when nylon packing materials and PIB are processed using similar machines, the heat that is generated as the nylon packing materials are torn apart is insufficient to melt the nylon. As a result, the nylon packing materials are shredded within the PIB thereby altering the chemical and physical profiles of the PIB and rendering the PIB unusable for use.
[004]In many applications, 100 lb drums that include nylon liners are filled with PIB at high temperatures and subsequently shipped. At the point of use, the nylon liners are typically


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removed from the drums, cut open, and manually processed. In many cases, the drums are manually lifted and inverted and the nylon liners are cut open. Subsequently, the PIB is scraped off of the nylon liners, by hand, into storage vessels. Since PIB is extremely tacky and viscous, its removal from the nylon liners is difficult, time consuming, and expensive. Accordingly, there remains an opportunity to develop an improved method and system of removing PIB from nylon liners.
[005]The present invention provides a method of removing polyisobutylene (PIB) from a container. The container has a body which defines an orifice. The container also typically has a polyamide liner disposed within the body. The polyamide liner contains the PIB. The method may include the step of providing the container and also may include the step of injecting air through the orifice to remove the PIB from the container. The instant invention also provides a PIB removal system which includes the container and...