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Polyethylene /Polylactide Block Copolymers for Plastics Additive Applications

IP.com Disclosure Number: IPCOM000238616D
Publication Date: 2014-Sep-05
Document File: 4 page(s) / 24K

Publishing Venue

The IP.com Prior Art Database

Related People

Willim P. Cottom: AUTHOR [+2]

Abstract

Baker Hughes Incorporated (BHI) announces a new line of polyethylene / polylactide block copolymers. These copolymers are produced via controlled polymerization to yield products with varying amounts of polyethylene and polylactide blocks. The process allows independent control of the polyethylene and polylactide blocks, which allows a wide range of properties. The polyethylene portion can have varied amounts of branching, ranging from essentially no branches (totally linear) to highly branched (hyperbranched). The polylactide content comes from biobased lactic acid and provides improved biodegradability for the new product. The polylactide content can range from <5% by weight up to around 95% by weight.

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Polyethylene /Polylactide Block Copolymers for Plastics Additive Applications

Baker Hughes Incorporated (BHI) announces a new line of polyethylene / polylactide block copolymers.  These copolymers are produced via controlled polymerization to yield products with varying amounts of polyethylene and polylactide blocks.  The process allows independent control of the polyethylene and polylactide blocks, which allows a wide range of properties.  The polyethylene portion can have varied amounts of branching, ranging from essentially no branches (totally linear) to highly branched (hyperbranched).  The polylactide content comes from biobased lactic acid and provides improved biodegradability for the new product.  The polylactide content can range from <5% by weight up to around 95% by weight.

BHI claims the following application benefits:

·         As antiblock additives for polymer resins.  The new wax can be used as an internal antiblock agent for plastic resins.  The properties of the new wax allow consistent migration to the surface and helps minimize blocking tendencies during storage or use. Adjusting the ratio of the polyethylene block to the polylactide block can help modify the migration rate of the new wax to the surface of the plastic resins.  Also, adjusting the amount of branching in the polyethylene block can help modify the migration rate of the new wax to the surface of the plastic resin.  The new wax can also be used as an external antiblock by applying directly to the film, or dispersing in water or solvent before applying to the film.  The new wax can be used at levels up to 5% by weight of the plastic resin. 

·         As additives to modify the surface properties of plastic films.  The new wax can be used to modify the surface properties of plastic films by migrating to the surface.  The polylactide block of the new product can modify the surface tension of polyolefin film, which can allow better printing with decreased amounts of corona treatment.  They can also help prevent moisture droplets from forming and creating “fogging” on the polyolefin film.  The polyethylene block of the new product can modify the surface properties of polylactic acid films by migrating to the surface.  The polylactide block provides compatibility, while the polyethylene block provides improved moisture resistance at the surface.  For both types of application, the ratio of the polylactide block to polyethylene block of the new product can be adjusted with the molecular weight to control the migration rate.  Also, adjusting the amount of branching in the polyethylene block can modify the migration rate.  The new wax can be used at levels up to 1% by weight in the polymer blend.

·         As additives to improve compatibility of polymer blends.  The new wax can be used to improve the compatibility of polymer blends.  The polyethylene block of the product is compatible with non-polar polymers, while the polylactide block is compatible with more polar p...