Rigid zeolite containing polyurethane foams

Title: Rigid zeolite containing polyurethane foams

Full Record
Other Related Research

Abstract

A closed cell rigid polyurethane foam has been prepared which contains up to about 60% by weight of molecular sieves capable of sorbing molecules with effective critical diameters of up to about 10 .ANG.. The molecular sieve component of the foam can be preloaded with catalysts or with reactive compounds that can be released upon activation of the foam to control and complete crosslinking after the foam is formed. The foam can also be loaded with water or other flame-retarding agents, after completion. Up to about 50% of the weight of the isocyanate component of the foam can be replaced by polyimide resin precursors for incorporation into the final polymeric network.

Inventors:

Frost, Charles B ^[1]

Livermore, CA

Publication Date:: 1985-01-01

Research Org.:: AT&T

OSTI Identifier:: 865461

Patent Number(s):: US 4518718

Assignee:: United States of America as represented by United States (Washington, DC)

DOE Contract Number:: AC04-76DP00789

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: rigid; zeolite; containing; polyurethane; foams; closed; cell; foam; prepared; contains; 60; weight; molecular; sieves; capable; sorbing; molecules; effective; critical; diameters; 10; ang; sieve; component; preloaded; catalysts; reactive; compounds; released; activation; control; complete; crosslinking; formed; loaded; water; flame-retarding; agents; completion; 50; isocyanate; replaced; polyimide; resin; precursors; incorporation; final; polymeric; network; closed cell; molecular sieves; polyurethane foams; polyurethane foam; molecular sieve; polyimide resin; polymeric network; active compound; rigid polyurethane; containing poly; /521/

Citation Formats


                    Frost, Charles B. Rigid zeolite containing polyurethane foams.  United States: N. p., 1985. 
        Web.

Copy to clipboard


                    Frost, Charles B. Rigid zeolite containing polyurethane foams.  United States.

Copy to clipboard


                    Frost, Charles B. Tue .  
        "Rigid zeolite containing polyurethane foams".  United States.  https://www.osti.gov/servlets/purl/865461.

Copy to clipboard


                    
@article{osti_865461,

  title        = {Rigid zeolite containing polyurethane foams},

  author       = {Frost, Charles B},

  abstractNote = {A closed cell rigid polyurethane foam has been prepared which contains up to about 60% by weight of molecular sieves capable of sorbing molecules with effective critical diameters of up to about 10 .ANG.. The molecular sieve component of the foam can be preloaded with catalysts or with reactive compounds that can be released upon activation of the foam to control and complete crosslinking after the foam is formed. The foam can also be loaded with water or other flame-retarding agents, after completion. Up to about 50% of the weight of the isocyanate component of the foam can be replaced by polyimide resin precursors for incorporation into the final polymeric network.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/865461},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1985},

  month        = {1}

}

Copy to clipboard

Patent:

View Patent

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Rigid zeolite containing polyurethane foams

Patent Frost, C B

A closed cell rigid polyurethane foam has been prepared which contains up to about 60% by weight of molecular sieves capable of sorbing molecules with effective critical diameters of up to about 10 A. The molecular sieve component of the foam can be preloaded with catalysts or with reactive compounds that can be released upon activation of the foam to control and complete crosslinking after the foam is formed. The foam can also be loaded with water or other flame-retarding agents, after completion. Up to about 50% of the weight of the isocyanate component of the foam can be replacedmore »« less
Rigid zeolite containing polyurethane foams

Patent Frost, C B

A closed cell rigid polyurethane foam has been prepared which contains up to about 60% by weight of molecular sieves capable of sorbing molecules with effective critical diameters of up to about 10 A. The molecular sieve component of the foam can be preloaded with catalysts or with reactive compounds that can be released upon activation of the foam to control and complete crosslinking after the foam is formed. The foam can also be loaded with water or other flame-retarding agents, after completion. Up to about 50% of the weight of the isocyanate component of the foam can be replacedmore »« less
The cure of rigid polyurethane encapsulating foam

Technical Report Adolf, D ; Childress, C

The disappearance of isocyanate groups in 20 lb/ft{sup 3} rigid polyurethane encapsulating foam (44402-20) was monitored by FTIR spectroscopy leading to an activation energy of 4 kcal/mole. The disappearance of isocyanates can be due to either crosslinking reactions or gas production. Attempting to separate these two reaction paths, we measured the gel time and volume change during cure leading to activation energies of 5 and 6 kcal/mole for the crosslinking and foaming mechanisms respectively. 3 refs., 16 figs.
Review of the literature on the gaseous products and toxicity generated from the pyrolysis and combustion of rigid polyurethane foams

Technical Report Paabo, M ; Levin, B C

The literature on rigid polyurethane foam was reviewed with an emphasis on the gaseous products generated under various thermal-decomposition conditions and the toxicity of those products. The review is limited to publications in English through 1984. Carbon monoxide (CO) and hydrogen cyanide (HCN) were the predominant toxicants found among more than 100 other gaseous products. The generation of CO and HCN was found to increase with increasing combustion temperatures. Many test methods were used to assess the acute inhalation toxicity of combustion products from various rigid polyurethane foams. Lethality, incapacitation, physiological, and biochemical parameters were employed as biological and points.more »« less
Modeling decomposition of rigid polyurethane foam

Conference Hobbs, M L

Rigid polyurethane foams are used as encapsulants to isolate and support thermally sensitive components within weapon systems. When exposed to abnormal thermal environments, such as fire, the polyurethane foam decomposes to form products having a wide distribution of molecular weights and can dominate the overall thermal response of the system. Decomposing foams have either been ignored by assuming the foam is not present, or have been empirically modeled by changing physical properties, such as thermal conductivity or emissivity, based on a prescribed decomposition temperature. The hypothesis addressed in the current work is that improved predictions of polyurethane foam degradation canmore »« less
Full Text Available

Similar Records