摘要:
Disclosed are novel photosensitive compositions containing a compound consisting essentially of repeating structural units of an alkyl aryl ether, which are end-capped with a substituent functional group containing an ethylenically unsaturated moiety, and a photosensitizing effective amount of a free radical generating compound. Through the selected exposure of films and coatings prepared from the above composition, it is possible to record information in such materials in a manner as to alter the physical and/or chemical properties of such films and coatings. This selective modification can then be simply manifested by contacting the exposed surface of the film or coating, subsequent to such exposure, with an alkaline developing solution. These compositions are useful in the graphic arts and in the manufacture of printed curcuit boards for the electronics industry.
摘要:
The invention relates to thermosetting compositions which are blends of novel poly(arylacetylenes) and, as fluidizers, certain aromatic organic compounds containing at least two aromatic rings. The poly(arylacetylenes) are prepolymers of polyacetylenically substituted aromatic compounds, which prepolymers have a number average molecular weight of from about 900 to about 12,000 and contain from about 5 to about 20% by weight of acetylenic groups. Diethynylbenzene is one of the preferred monomers used in preparation of the prepolymers. Representative of the compounds containing at least two aromatic rings are diphenyl ether and dibenzofuran. The compositions are curable by heat to produce thermoset resins which have very desirable physical properties at both normal and high temperatures.
摘要:
A METHOD OF PRODUCING POLYMERS OF THE CROSSLINKED POLYPHENYL TYPE BY POLYCYCLOTRIMERIZATON OF DIETHYNYL DERIVATIVES OF AROMATIC OR HETEROCYLIC COMPOUNDS OF THE GENERAL FORMULA CH=C-R-C=CH, WHERE R IS
PHENYL, PHENOXYPHENYL
OR OF A MIXTURE THEREOF WITH MONOETHYNYL ORGANIC COMPOUNDS OF THE FORMULA CH=C6H5 IN THE PRESENCE OF COMPLEX CATALYSTS WHICH ARE COMPLEX COMPOUNDS OF TRANSITIONS METALS BELONGING TO GROUPS IV-VIII OF THE PERIODIC TABLE, SUCH AS/(RO)3P/NCOHAL, WHERE R IS A LOWER ALKYL, HAL IS CL, BR, I, AND N=3 OR 4. AS A RESULT OF SAID METHOD, A NEW TYPE OF PHENYLENES IS OBTAINED, CONFORMING TO THE FOLLOWING STRUCTURES:
(BENZENETRIYL-R)X- AND ((C6H5-PHENYLENE)-R)X-
WHERE R HAS THE ABOVE-SPECIFIED SIGNIFICANE, AND X IS ANY NUMBER. SUCH POLYMERS ARE THERMOSETTING, THAT IS WHEN HEATED UP TO 150-200*C., THEY SET AND PASS INTO AN INFUSIBLE AND INSOLUBLE STATE; THEY FEATURE A HIGH THERMOSTABILITY UP TO 900*C., AND REMAIN INVARIABLY STABLE TO THERMAL DEFORMATION UP TO TEMPERATURES OF THERMAL DECOMPOSITION THEREOF (500-600*C.).
摘要:
WHEREIN: R represents an alkylene group comprising one to 12 carbon atoms, a -CH2-Z-CH2- group or an arylene group, Z being O, S or NH, and X and Y represent hydrogen, chlorine, or methyl, and the process of making the photographic element is described.
A photographic element comprising a support having a coating comprising a polymer of styrene and a bis-maleimide of the formula:
摘要:
This invention relates to the new norbornanyl rosin resin compositions which are easily obtainable by reacting the norbornenyl compounds or their alpha, beta-unsaturated esters with rosin derivative. In particular, this invention relates to a new process for making hybrid rosin resin suitable for production adhesive, ink, coating, plasticizer, thermoplastic or thermosetting plastic and functional polymers.
摘要:
A curable composition for bonding windings or core laminates in an electrical machine is presented. The curable composition includes: (A) about 10 weight percent to about 25 weight percent of a polyfunctional cyanate ester; (B) about 35 weight percent to about 65 weight percent of a first difunctional cyanate ester, or a prepolymer thereof; (C) about 15 weight percent to about 40 weight percent of a second difunctional cyanate ester, or a prepolymer thereof. An associated method is also presented.