Abstract: Process for cementing semiconductor discs to a carrier plate for subsequent olishing, which comprises applying to the discs a cementing solution being composed of(a) a resin of a melting range between 50.degree. and 180.degree. C. and a melt viscosity between 1000 and 6000 P;(b) a substance acting as plasticizer for the resin at cementing temperatures; and(c) a solvent for the resin and the plasticizer, which evaporizes at cementing temperatures,while avoiding during the application the occlusion of air bubbles between discs and cementing layer, and exerting pressure onto the plates at a temperature between cementing temperatures and 30.degree. C. below the same. The invention also comprises the carrier plate carrying one or more discs cemented thereto by the above process.

Abstract: A novel unsaturated polyester resin composition comprising an unsaturated alkyd and a crosslinkable vinyl monomer, said unsaturated alkyd being a modified unsaturated alkyd obtained by reacting a polybasic acid with a polyhydric alcohol in the presence of a cyclopentadiene-type oil having a viscosity at 25.degree. C. of 50 to 50,000.

Abstract: The novel aspect of this invention resides in co-reacting a toughening agent with components of an unsaturated polyester resin in order to introduce the toughening agent into the backbone of the unsaturated polyester resin and thus produce a toughened stable resin. Suitable toughening agents are carboxyl and hydroxyl terminated reactive liquid polymers which are used in amount of 1 to 30, preferably 1 to 15 parts by weight per 100 parts by weight of reactant monomers used to prepare the polyester resin.

Abstract: Disclosed is a process for producing styrene-soluble unsaturated polyester resins from DMT process residue. In a preferred embodiment of the process, DMT process residue is transesterified with propylene glycol until a hydroxyl-terminated ester product having a methoxyl content within a specified range is formed and then the resulting ester product is esterified with maleic anhydride.

Abstract: A copolymer having peroxy bonds in the molecule thereof which is obtained by copolymerizing an diacyl type polymeric peroxide having ester bonds therein with one or more monomers having double bonds therein, may have a broad range of average molecular weight and a lot of peroxy bonds therein, and it may be used as an useful polymerization initiator in producing a block copolymer.

Abstract: A molding resin composition comprising (a) 40 to 70 parts by weight of an unsaturated polyester, (b) 60 to 20 parts by weight of a dialkyl ester of alkenyl succinic acid, and (c) 0 to 30 parts by weight of a polymerizable monomer other than the component (b) can produce molded articles excellent in mechanical properties, e.g. toughness and coating properties.

Abstract: The invention disclosed is for a method of preparing unsaturated polyester resins containing high amounts of dicyclopentadiene. These polyester resins are useful in curable liquid compositions containing them together with a monomeric copolymerizable component. Such compositions may be used at ambient or elevated temperature, in casting, laminating or molding techniques known to the polyester resin art.

Abstract: Tertiary aromatic amines derived from aminoglutethimide or para-aminophenylacetic acid act as accelerators for the peroxide catalyzed polymerization of acrylic resins, especially methacrylates, acrylates and unsaturated polyesters. The amines are characterized by good hardening, strength, color and toxicity characteristics, and are thereby particularly suited for use in the filling and restoration of human teeth and the cementing of bone.

Abstract: A process for preparing laticies of cross-linked, elastomeric aliphatic polyesters comprising preparing a solution of the polyester in an organic solvent, emulsifying the polyester solution, stripping out the solvent and cross-linking the resulting polyester latex by heating with a peroxide. Upon coagulation, the cross-linked elastomer is obtained as a free-flowing powder.

Abstract: A water-soluble reactive binder, characterized by a combination of at least three of the components(a) at least one halogen-free polycarboxylic acid compound;(b) at least one salt-forming substance selected from the group consisting of alkali metal, alkaline earth metal and quaternary ammonium salts, organic bases and ammonia;(c) at least one component selected from the group consisting of(c1) a polymer containing OH groups; and(c2) an epoxide compound,wherein the components (a) to (c2) are present as such or at least partially in chemically bonded form, a process for its preparation, an article coated with said binder and an adhesive containing said binder.

Abstract: The invention disclosed is for a method of preparing unsaturated polyester resins containing high amounts of dicyclopentadiene. These polyester resins are useful in curable liquid compositions containing them together with a monomeric copolymerizable component. Such compositions may be used at ambient or elevated temperature, in casting, laminating or molding techniques known to the polyester resin art.

Abstract: This invention is directed to a half ester characterized by the following empirical formula: ##STR1## wherein n is a number having an average value of 1.7 to 2, and m is equal to 2-n. Also described herein is a composition comprising said half ester, maleic anhydride and an ethylenically unsaturated monomer, wherein at least 75 mole percent of the half ester is in the maleate form.

Abstract: An economical and environmentally advantageous process for the continuous manufacture of unsaturated polyesters, wherein the vapors formed during the polycondensation are purified, in a two-part distillation column, to a degree where the residual content of organic starting materials is less than 1.5 percent by weight, based on the total weight of the effluent, and the unconverted starting materials are recycled to the process.

Abstract: Light-colored unsaturated polyester resins containing at least 2% by weight bromine can be prepared by using at least a portion of the glycol ingredient dibromo neopentyl glycol and by using from 5 to 85 mol percent of tetrahydrophthalic acid or anhydride or endomethylene tetrahydrophthalic acid or anhydride.

Abstract: Highly reactive unsaturated polyesters for air-drying polyester resins can be obtained by reacting .beta.,.gamma.-ethylenically unsaturated ether alcohols with a polyester precondensate.

Abstract: Composition of matter and process for imparting a colorless appearance to cast allyl diglycol carbonate articles such as lenses and lens blanks and for simultaneously imparting to the article an ability to fluoresce when subjected to ultraviolet light. The composition comprises about 40 parts maleic anhydride, maleic acid, copolymers of propylene glycol with maleic acid or maleic anhydride, or mixtures thereof, and between about 0.5 and 1.5 parts of a mixture of 10 parts cobalt acetyl acetonate and between about 0.4 parts to 1.2 parts copper acetyl acetonate. Between about 0.05 and 0.15 parts of the composition is mixed with 1600 parts allyl diglycol carbonate monomer-catalyst prepolymer mixture and cast to form the desired article.

Abstract: A thermoplastic molding composition comprising a polycarbonate, a poly(1,4-butylene terephthalate) and a copolyester of an aliphatic or cycloaliphatic diol and a mixture of terephthalic and isophthalic acids.

Abstract: The invention relates to a resin composition that is curable by ultra-violet light, which composition comprises(a) 10 to 99.7 percent by weight of a polyester that contains .alpha., .beta.-ethylenically unsaturated dicarboxylic acid radicals and .beta.,.gamma.-ethylenically unsaturated ether groupings, and(b) 0.3 to 10 percent by weight of a photoinitiator.