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Foam from inorganic physical blowing agents with improved properties

A foaming composition, selected technology, applied in the direction of layered products, etc.

Inactive Publication Date: 2019-08-27
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The environmental concerns of CFCs are well known and the use of low boiling point hydrocarbons is a safety concern due to their flammability

Method used

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  • Foam from inorganic physical blowing agents with improved properties
  • Foam from inorganic physical blowing agents with improved properties
  • Foam from inorganic physical blowing agents with improved properties

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0029] The examples illustrate the foamability of the terpolymer poly(ethylene-co-vinyl acetate-co-carbon monoxide).

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Abstract

The present invention relates to the field of foamable compositions having an ethylene-based co-polymer containing a carbon monoxide co-monomer.

Description

technical field [0001] The present invention relates to foaming compositions with improved foam properties having ethylene copolymers containing carbon monoxide (-CO) as a comonomer. Background technique [0002] Generally, there are two types of blowing agents used to make polymeric foams: chemical blowing agents (CBAs) and physical blowing agents (PBAs). Chemical blowing agents decompose at elevated temperatures to produce gases that are used to foam the polymer. These CBAs have a relatively high cost and have undesirable decomposition products. For example, the decomposition of one of the most common CBAs (azodicarbonamide) produces mainly nitrogen gas, but also undesired products such as carbon monoxide and ammonia. Physical blowing agents are liquids, gases or supercritical fluids that are mixed directly with the polymer resin prior to foaming. In the past, common physical blowing agents were chlorofluorocarbons (CFCs) and low boiling hydrocarbons such as isobutane. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12C08L23/08
CPCC08J9/122C08J2201/032C08J2203/06C08J2203/08C08J2323/08B32B5/18C08F210/02C08L23/08C08J9/0061C08J2331/04C08J2333/10
Inventor J·P·比晓普D·M·迪恩E·凯兰
Owner EI DU PONT DE NEMOURS & CO