Polyimide resins

Patent · 01 January 1993

OSTI ID:869003

Tesoro, Giuliana C ^[1]; Sastri, Vinod R ^[2]

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1. Dobbs Ferry, NY
2. Brooklyn, NY

A method for the preparation of a polyimide containing reversible crosslinks comprising the step of curing a monomer having the formula ##STR1## wherein R and R' may be the same or different and each is H or lower alkyl having 1-5 carbon atoms under conditions conducive to the formation of a polyimide and thereby forming a polyimide having the formula ##STR2## R and R' are as defined above and n is an integer from 10 to 100. The polyimide may be converted to a soluble polymer by cleaving the disulfide bond in the presence of a solvent and a reducing agent. The reduced polymer may be reformed into the polymer in an oxidation step or into a modified polyimide in other reaction steps. Copolymerization processes are also disclosed.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
• Assignee: Polytechnic University (Brooklyn, NY)
• Patent Number(s): US 5260411
• OSTI ID: 869003
• Country of Publication: United States
• Language: English

Related Subjects

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1-5
10
100
agent
alkyl
atoms
bond
carbon
carbon atom
carbon atoms
cleaving
comprising
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conducive
containing
converted
copolymerization
crosslinks
curing
defined
disclosed
disulfide
formation
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modified
monomer
oxidation
oxidation step
polyimide
polyimide containing
polyimide resin
polymer
polymerization process
polymerization processes
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presence
processes
reaction
reaction step
reaction steps
reduced
reducing
reducing agent
reformed
resins
reversible
soluble
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soluble polymer
solvent
step
steps
str1
str2