Abstract: A method is disclosed for the preparation of ceramic materials or articles by the pyrolysis of preceramic polysilanes wherein the preceramic polysilanes are rendered infusible prior to pyrolysis by exposure to ultraviolet irradiation in the presence of a reactive gas selected from the group consisting of ethylene, 1,3-butadiene, 2-methyl-1,3-butadiene, 1,4-pentadiene, silane, chlorosilane, dichlorosilane, boron trichloride, oxygen and water mixture, acetylene, and tetravinylsilane. This method is especially suited for the preparation of ceramic fibers. The ceramic fiber's surface properties can be modified by the practice of this invention; for example, a ceramic fiber with a carbon rich surface layer can be obtained when 1,3-butadiene is used as the reactive gas.

Abstract: The present invention concerns an aqueous processible solid photosensitive composition for relief printing plates comprising(a) an addition photopolymerizable ethylenically unsaturated monomer;(b) a photoinitiator or photoinitiating system activated by actinic light; and(c) a core shell microgel binder;wherein the core shell microgel binder has two domains, a core having less than 10% crosslinking and an aqueous processible non-crosslinked outer shell consisting of an acid-modified copolymer, and further wherein the monomer partitions in the shell of the microgel and the shell is grafted to the core using at least 0.1% of a grafting agent.The invention also concerns a photosensitive element containing this composition.

Abstract: In a photosensitive recording material suitable for producing plates or resist patterns, the photopolymerizable recording layer contains as polymeric binder a film-forming copolymer which has a multiphase morphology, one phase having a glass transistion temperature below room temperature and a further phase having a glass transition temperature above room temperature and this copolymer having been obtained by free radical copolymerization of one or more macromers with one or more further olefinically unsaturated copolymerizable organic compounds.

Abstract: An electroconductive polymeric material comprises a dispersion of dicyclopentadienyl iron in a vinyl chloride resin having (--CH.sub.2 --CHCl--) structure in the molecular chain or a vinylidene chloride resin having (--CH.sub.2 --CCl.sub.2 --) structure in the molecular chain irradiated with light having ultraviolet rays. This electroconductive polymeric material can easily be molded because it gels under heating, and can also be formed into a film by dissolving it in an organic solvent and evaporating the solvent after casting or spreading. Doping the electroconductive polymeric material with an anionic dopant after the irradiation provides optical response characteristics with further improved electroconductivity.

Abstract: The present invention concerns an aqueous processible solid photosensitive composition for making relief plates comprising(a) an addition photopolymerizable ethylenically unsaturated monomer;(b) a photoinitiator or photoinitiating system activated by actinic light; and(c) a core shell microgel binder; wherein the core shell microgel binder has two domains, a core having less than 10% crosslinking and an aqueous processible non-crosslinked outer shell consisting of an acid-modified copolymer, and further wherein the monomer partitions in the shell of the microgel. The invention also concerns a photosensitive element containing this composition.

Abstract: The present invention relates to a method of synthesizing a bigraft compolymer based on grafted type peracid polymer, which comprises graft polymerizing a first ethylenically unsaturated monomer containing a carboxyl group onto a polymer substrate having a form of a membrane, particulate or tube; oxidizing the carboxyl groups of the resulting graft polymer into peracids; and then graft polymerizing a second ethylenically unsaturated monomer onto the grafted chain of the graft polymer through the decomposition of the peracid. Surface profile and morphology of the bigraft copolymer membrane product is also investigated by scanning electron microscopy and transmission electron microscopy respectively.

Abstract: The present invention relates to a method for hot curing thermosetting resins and vulcanizable elastomers, based on the use of perfluoropolyethers in the liquid state as heat transfer media.

Abstract: Radiation curable compositions useful as coatings for wood, metal, glass, fabric paper, fiber and plastics are made from copolymers of p-acetoxystyrene and another monomer which is an alkadiene or an allyl ester of a polymerizable ethylenically unsaturated acid blended with ethylenically unsaturated compounds.

Abstract: Radiation curable compositions useful as coatings for wood, metal, glass, fabric, paper, fiber and plastics are made from copolymers of dialkyl muconates and p-acetoxystyrene blended with ethylenically unsaturated compounds.

Abstract: A linear polymer having a recurring unit represented by the formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each independently is a hydrogen atom, a C.sub.1-10 alkyl group, a C.sub.6-10 cycloalkyl group, an aryl group, or a halogen atom and the ethynyl group is in either meta position or para position to the main polymer chain;and a weight-average molecular weight of 1,000 to 1,000,000. A resin composition consisting essentially of (i) a polymer having a recurring unit represented by the formula (I) or a polymer having a recurring unit represented by the formula (I) and a recurring unit represented by the formula (II): ##STR2## wherein X and Y each independently is a C.sub.6-20 aryl group, a C.sub.1-10 alkyl group, a C.sub.6-10 cycloalkyl group, a silyl group having a C.sub.1-10 alkyl group or a C.sub.

Abstract: A contact lens comprising a lens substrate in shape of a lens which comprises a triorganovinylsilane based polymer, said lens substrate having a hydrophilic polymeric chain grafted onto the surface thereof. This contact lens is not only excellent in oxygen permeability, mechanical strength, dimensional stability, vision correcting ability, staining resistance and handleability, but also good in affinity with eyes due to good hydrophilic property possessed by the surface, which can be worn continuously for a long time.

Abstract: A solid photopolymerizable composition, contains addition polymerizable ethylenically unsaturated monomer, initiating system, polymer binder and a microgel wherein preferably the binder and microgel form substantially a single phase and have a similar glass transition temperature above 25.degree. C. Although less preferred the solid composition can function without the binder. A preferred use is as a photoresist.

Abstract: s-Triazine compounds, the molecule of which contains at least one ethylenically unsaturated group and at least one 2,2,6,6-tetramethylpiperidine group can be grafted onto organic polymers, in particular onto polyolefines, in the presence of free-radical formers or by means of irradiation. Examples of free-radical formers are peroxy or azo compounds. If polyunsaturated piperidine-triazine compounds are used, it is also possible to achieve crosslinking of the polymer, particularly in the case of polyethylene.

Abstract: A photopolymerizable resin composition for aqueous-developing type dry film resists which comprises(A) 40 to 85% by weight of a binder resin comprising a copolymer of methyl methacrylate, methyl acrylate and methacrylic acid,(B) 15 to 60% by weight of a crosslinkable monomer having at least two ethylenically unsaturated groups in the molecule, and(C) 0.5 to 10% by weight, based on the total amount of the above components (A) and (B), of a photoinitiator.

Abstract: A uranium adsorbing material made of a graft polymer with a graft ratio of 20 to 100% which contains amidoxime groups and cation exchange groups in a molar ratio of 1:1 to 20:1 and a process for preparing said material are herein disclosed.