Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Branched Aliphatic-Aromatic Polyester Blends

a polyester blend and aliphatic acid technology, applied in the direction of packaging, synthetic resin layered products, stoppers, etc., can solve the problems of rapid biodegradability, achieve better melt capillary stability, improve thermal stability, and increase melt strength

Inactive Publication Date: 2012-05-03
METABOLIX
View PDF29 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]Combining (e.g, mixing or blending) the polymer blends in the presence of a reactive branching agent, e.g., peroxide, provides the following benefits compared to combining the polymer blends without any reactive chemistry: (1) higher melt strength, (2) improved thermal stability and / or better melt capillary stability, resulting in a broader processing window for the overall composition, (3) synergistic film properties, e.g., film tear properties of the compositions are better than PHA or aromatic / aliphatic polyesters film by itself, (4) higher toughness for injection molded bars, and (5) lower flash during injection molding process.

Problems solved by technology

In some applications, the rapid biodegradability of PHAs can be a problem, and thus a need exists to control the rate of biodegradation of PHAs.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Branched Aliphatic-Aromatic Polyester Blends
  • Branched Aliphatic-Aromatic Polyester Blends

Examples

Experimental program
Comparison scheme
Effect test

example 1

Reactive Blend composition with PHA, PBAT, Organic Peroxide and Co-agent

[0147]In this example, rheological data for a PHA reactively melt-compounded with PBAT in the presence of an organic peroxide and co-agent is presented. Other additives included in the formulations were EMFORCE BIO™ calcium carbonate (Specialty Minerals), the plasticizer CITROFLEX™ A4 (Vertellus Specialties Inc.); a Slip / antiblock Master Batch which was a mixture composed of 15% by wt. Erucamide (Croda), 15% by wt. OPTIBLOCTM 10 talc filler (Specialty Minerals); a nucleating agent master batch (Nuc. MB) which was composed of cyanuric acid compounded at 33% by wt. into a base PHA resin of 3-hydroxybutanoic acid and 4-hydroxybutanoic acid and 68% by wt. PHA copolymer blend composed of about 34-38% homo-polymer of 3-hydroxybutanoic acid, and about 22-26% co-polymer of 3-hydroxybutanoic acid and 4-hydroxybutanoic acid, where the 4-hydroxybutanoic acid is approximately 10-12 weight percent, and about 38-42% co-polyme...

example 2

Blown Films Containing Aromatic / Aliphatic Polyester

[0151]In this example, blown films were made and tested for biodegradability. The following PHA formulation was made.

TABLE 3PHA Formulation for Blown FilmIngredientWt %PHA Blend78.00Nuc MB3.00CaCO35.00Slip Antiblock MB5.00CITROFLEX A48.73Peroxide0.18PE3A0.09

[0152]The PHA blend was composed of about 34-38% homo-polymer of 3-hydroxybutanoic acid, and about 22-26% co-polymer of 3-hydroxybutanoic acid and 4-hydroxybutanoic acid, where the 4-hydroxybutanoic acid is approximately 8-14 weight percent, and about 38-42% co-polymer of 3-hydroxybutanoic acid and 4-hydroxybutanoic acid with the 4-hydroxybutanoic acid composition being nominally 25-33 weight percent. The nucleating masterbatch (Nuc. MB) was cyanuric acid that had been previously compounded at a rate of 33% (by weight) into a base resin of 3-hydroxybutanoic acid and 4-hydroxybutanoic acid, and pelleted. The slip anti- block masterbatch was a mixture of erucamide (20% by weight) d...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Fractionaaaaaaaaaa
Fractionaaaaaaaaaa
Fractionaaaaaaaaaa
Login to View More

Abstract

Compositions of PHAs with aromatic / aliphatic polyester are described and methods of making the same.

Description

[0001]This application claims the benefit of U.S. Provisional Application No. 61 / 269,582, filed on Jun. 26, 2009. The entire teachings of the above application is incorporated herein by reference.BACKGROUND[0002]Biodegradable plastics are of increasing industrial interest as replacements or supplements for non-biodegradable plastics in a wide range of applications and in particular for packaging applications. One class of biodegradable polymers is the polyhydroxyalkanoates (PHAs), which are linear, aliphatic polyesters that can be produced by numerous microorganisms for use as intracellular storage material. Articles made from the polymers are generally recognized by soil microbes as a food source. There has therefore been a great deal of interest in the commercial development of these polymers, particularly for disposable consumer items. The polymers exhibit good biodegradability and useful physical properties.[0003]In some applications, the rapid biodegradability of PHAs can be a ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B32B27/36C08L67/04C08G63/06
CPCB32B27/08B32B2605/00C08J5/18C08J2367/04C08L67/04C08G63/912C08L67/08C08G63/91Y10T428/31794C08J2367/02C08J2467/04C08L67/02B32B27/18B32B2270/00B32B2307/54B32B2307/558B32B2307/5825B32B2307/7145B32B2307/7163B32B2307/738B32B2410/00B32B2435/00B32B2439/00B32B2457/00B32B2509/00B32B2535/00B32B2553/00B32B2555/00B32B27/36C08G63/78C08J3/246C08K5/0083C08G2261/131
Inventor KRISHNASWAMY, RAJENDRA K.SUN, XIUDONG
Owner METABOLIX
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com