 2-Acrylamido-2-methylpropane sulfonic acid vinyl aminimide/copolymer |
| OF THE INVENTION The novel copolymers of the present invention are prepared by conventional vinyl ... |
|
| Zearaline glycoside compounds |
| It is claimed: 1. A compound of the formula ##SPC11## wherein --A-- is either --CH.sub.2 --CH.sub.2 ... |
|
| Fortimicin AK |
| OF PREFERRED EMBODIMENTS The compound of this invention, fortimicin AK is represented by the F... |
|
| 3-Cyano or acyl-4-aryl-5-arylazo-6-hydroxypyridone-2 dyes |
| 1. A compound of the formula wherein R.sub.1 is phenyl, substituted phenyl, naphthyl or substituted ... |
|
| Semi-rigid polyurethane foam used in packaging |
| What is claimed is: 1. A semi-rigid polyurethane foam prepared from a reaction mixture having an ... |
|
| Tripeptides having an antidepressive and prolactin-releasing action |
| What we claim is: 1. A tripeptide of the formula ##SPC2## wherein X is alkyl having 3 to 8 carbon ... |
|
| Thermosetting vinyl chloride polymer powder coatings |
| What I claim is: 1. A thermosetting vinyl chloride polymer powder coating composition comprising ... |
|
| Worn tool detector utilizing normalized vibration signals |
| Pursuant to the present invention the signal waveform from a vibration sensor is connected to a ... |
|
| Acoustic detection of tool break events in machine tool operations |
| An object of the invention is to provide a cutting tool break detection system that improves on ... |
|
| TV service triggered oscilloscope |
| Briefly, there is provided in accordance with the present invention an oscilloscope having sweep ... |
|
|
Addition products of diacetylene-terminated polyimide derivatives and a dienophile having a terminal vinyl group
| Details |
Inventors: D'Alelio, deceased, Gaetano F.; Waitkus, Phillip A.;
Assignee: Plastics Engineering Company (Sheboygan, WI)
Primary Examiner: Wong, Jr.; Harry
Assistant Examiner:
Attorney, Agent or Firm: Monacelli; Walter J.
Novel, unsaturated diacetylene-terminated polyimides and processes for their preparation are disclosed herein. These new polyimides are derivatives of anhydride-terminated aromatic polyimides from which they can be prepared by amidation to provide new unsaturated amide groups having a terminal group containing the structure --C.tbd.C--C.tbd.C--, hereinafter sometimes referred to as "conjugated diynes". These new compositions are more tractable than the original anhydride-terminated polyimides and can be converted at appropriate lower temperatures to crosslinked, insoluble, infusible polymers without by-product formation, thereby extending greatly the applications for which the aromatic polyimides can be employed. Moreover, these new polyimides can undergo the Diels-Alder type of addition with a large number of dienophiles. Certain monomeric materials are also described. |
|
DETAILED DESCRIPTION The invention claimed is: 1.
The Diels-Alder addition product of (1) a conjugated diacetylene compound of the formula: ##STR51## and (2) a dienophile of the formula: ##STR52## wherein: Ar' is a tetravalent aromatic organic radical, the four carbonyl groups being attached directly to separate carbon atoms and each pair of carbonyl groups being attached to the adjacent carbon atoms in Ar' except in the case of Ar' being a naphthalene radical, one or both pairs of the carbonyl groups may be attached to peri-carbon atoms; Ar is a divalent aromatic organic radical; n is zero or an integer having a value of one to 20; n' is zero or an integer having a value of one to 20; R is hydrogen or an organic moiety containing 1 to 21 carbon atoms; and R' is a divalent organic moiety containing 1 to 12 carbon atoms.
2.
The product of claim 1, in which R is H.
3.
The product of claim 1 in which R is C.
sub.
6 H.
sub.
5.
4.
The product of claim 1, in which n and n' are zero.
5.
The product of claim 1 in which n is zero and n' is at least one.
6.
The product of claim 1, in which n is at least one and n' is zero.
7.
The product of claim 1, in which the Ar' groups of the diacetylene compound and dienophile are selected from the class consisting of: ##STR53## 8.
The product of claim 7, in which the Ar' groups of both the diacetylene compound and of the dienophile are ##STR54## 9.
The product of claim 1, in which the Ar attached to --C.
tbd.
C--C.
tbd.
C-- is selected from the class consisting of --C.
sub.
6 H.
sub.
4, --C.
sub.
6 H.
sub.
4 OC.
sub.
6 H.
sub.
4 --, and C.
sub.
6 H.
sub.
4 SO.
sub.
2 C.
sub.
6 H.
sub.
4 --.
10.
The product of claim 1, in which bracketed portion of the conjugated diacetylene compound is prepared by the reaction of a dianhydride of an aromatic tetracarboxylic acid and a diamine selected from the class consisting of: 1,3- and 1,4-(NH.
sub.
2).
sub.
2 benzene 2,3-; 2,4-; 2,6- and 3,5-(NH.
sub.
2).
sub.
2 toluene; 3,3'-; 4,4'- and 3,4'-methylene dianiline; 4,4'-, 3,3'- and 3,4'-oxydianiline; 4,4'-; 3,3'- and 3,4'-sulfonyldianiline; 1,3-; 1,4- and 1,2-bis(3-aminophenoxy) benzene; 1,3- and 1,4-bis(4-aminophenoxy) benzene, and H
|
| Related patents |
|
|
Substance and process for converting waste cooking oil into liquid soap
What I claim is: 1. A process for converting waste cooking oil to detergent, comprising contacting a waste cooking oil with a composition comprising greater than 50% of ...
|
|
|
Bacterial nitrite oxidizer
It is an object of the present invention to provide an isolated bacterium or bacterial strain capable of oxidizing nitrite to nitrate. In a particularly preferred ...
|
|
|
Preparation of an alkaline protease
What we claim is: 1. A process for preparing a novel alkaline protease which is a columnar crystalline powder, having a molecular weight of about 33,000 by the Archibald ...
|
|
|
Process and apparatus for preparation of single crystal of biopolymer
A primary object of the present invention is to provide a process and apparatus for preparing a single crystal of a biopolymer by growth from a solution, in which the ...
|
|
|
Preparation of cross-linked glucose isomerase crystals
OF THE INVENTION In the process according to the invention, glucose isomerase crystals are cross-linked by means of a dialdehyde, such as glutaraldehyde, and a compound ...
|
|
|
Endo-B-1,4-glucanases from saccharothrix
OF THE INVENTION The enzyme or enzyme preparation of the invention is obtainable from or endogeneous to a strain belonging to the genus Saccharothrix, preferably from ...
|
|
|
Stabilizer blend
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows: 1. An ice cream composition which is stabilized and ...
|
|
|
Production of a recombinant human colony stimulating factor
What is claimed is: 1. A process for producing a protein capable of stimulating proliferation of monocytic cells in both human and mouse bone marrow assays comprising ...
|
|
|
Methyl isocyanate process
OF THE INVENTION This invention relates to a process for preparation of methyl isocyanate (MIC) by thermal dehydrochlorination of a solution of methyl carbamyl chloride ...
|
|
|
Sulphonic acid salts of S-adenosilmethionine
I claim: 1. Stable salts of S-adenosil-L-methionine (SAM) with sulphonic acids selected from the group consisting of methanesulphonic, ethanesulphonic, 1-n-...
|
|
|
Molecular Biology 
