Unlock instant, AI-driven research and patent intelligence for your innovation.

Salt modified electrostatic dissipative polymers

A technology of polymers and compositions, applied in the direction of organic material conductors, non-metallic conductors, etc., can solve problems such as non-conductivity

Active Publication Date: 2013-01-16
LUBRIZOL ADVANCED MATERIALS INC
View PDF8 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these prior art ESD materials do not possess the desired balance of electrical conductivity and acceptably low leachable anions and / or cations, which can result in finished articles containing these ESD additives being unsuitable for certain end applications. Unacceptable properties wherein the anions and / or cations are in particular chloride, fluoride, bromide, nitrate, phosphate, sulfate and ammonium

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
  • Salt modified electrostatic dissipative polymers
  • Salt modified electrostatic dissipative polymers
  • Salt modified electrostatic dissipative polymers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] A series of ESD compositions were prepared by mixing PEG-based TPU and lithium bis(oxalate)borate. The salt is added to the TPU via wet adsorption. Multiple samples were prepared at different salt contents and the ESD properties of the compositions were measured. The test results are summarized in the table below.

[0091] Table I—ESD Properties of TPU Compositions

[0092]

[0093] 1: Resistance measured based on ASTM D257 at 50% relative humidity

Embodiment 2

[0095] A series of ESD compositions were prepared by mixing various polymers and lithium bis(oxalate)borate. The salt is added to the TPU via wet adsorption. The content of salt in each example was 2% by weight of the total composition. The ESD properties of the compositions are measured. The test results are summarized in the table below.

[0096] Table II - ESD Properties of Polymer Compositions

[0097]

[0098] 1: Resistance is measured based on ASTM D257 at 50% relative humidity

[0099] 2: Static decay was measured based on FTMS-101C at 12% relative humidity. Static decay time reflects the time required for articles made of the example materials to discharge the indicated initial voltages and reach the indicated final voltages.

Embodiment 3

[0101] A range of fully formulated ESDs prepared by mixing polyethylene glycol (PEG) based thermoplastic polyurethane (TPU) into modified polyethylene terephthalate (PETG) based formulations and adding other additive packages combination. The PEG-based TPU was mixed with salt, and a different salt was used in each example. Comparative Example 3-A contained lithium (bis)trifluoromethane-sulfonimide (halide-containing lithium salt) at a treatment ratio of about 0.4 wt%. Example 3-B contained lithium bis(oxalate)borate (halogen-free lithium salt) at a treat rate of about 0.3% by weight. The ESD properties of the compositions are measured. The results of this test are summarized in the table below.

[0102] Table III - ESD Properties of TPU Polymer Compositions

[0103]

[0104] 1: Resistance measured based on ASTM D257 at 50% relative humidity

[0105] 2: Static decay was measured based on FTMS-101C at 12% relative humidity.

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

No PUM Login to View More

Abstract

The present invention relates to electrostatic dissipative thermoplatic urethanes (TPU) and compositions thereof. The present invention provides a composition comprising (a) an inherently dissipative polymer and (b) a halogen-free lithium-containing salt. The invention also provides a shaped polymeric article comprising the inherently dissipative polymer compositions described herein. The invention also provides a process of making the inherently dissipative polymer compositions described herein. The process includes the step of mixing a halogen-free lithium-containing salt into an inherently dissipative polymer.

Description

technical field [0001] The present invention relates to static dissipative polymers and blends, including thermoplastic polyurethane (TPU) containing compositions. Background of the invention [0002] The formation and retention of static charges on most plastic surfaces is well known. Due to their low electrical conductivity, plastic materials have a significant tendency to accumulate static charges. The formation and maintenance of such static charges can be problematic. The presence of static charges on thermoplastic film sheets can, for example, cause the sheets to stick to each other, making it more difficult to separate them for further processing. In addition, the presence of static charges causes dust to adhere to items packaged in plastic bags, for example destroying the attractiveness of many sales items. [0003] The increasing complexity and sensitivity of microelectronic devices has made the control of electrostatic discharge a serious concern for the electro...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/55H01B1/06H01B1/12
CPCC08K5/55C08L75/04H01B1/06H01B1/12
Inventor 卢启威Y·埃克斯坦
Owner LUBRIZOL ADVANCED MATERIALS INC