Abstract: A radiation-sensitive polyimide precursor composition, comprising a polymer of the formula ##STR1## wherein n is a positive integer corresponding to the number of units in the polymer and is sufficiently large to provide the polymer with a number average molecular weight of about 1500-15,000 as determined by vapor pressure osmometry, and wherein for any particular unit in the polymer:.fwdarw.denotes isomerism;R.sup.1 is a tetravalent aromatic non-halogen containing organic radical containing at least one ring of six carbon atoms, said ring characterized by benzenoid unsaturation, the four carbonyl groups being attached directly to separate carbon atoms in a ring of the R.sup.1 radical;R.sup.2 and R.sup.3 are selected from the group consisting of a hydrogen radical and any organic radical containing a photopolymerizable olefinic double bond, at least one of R.sup.2 and R.sup.3 being said organic radical;R.sup.4 and R.sup.

Abstract: An additive for use in high solids coating compositions which is a blend of(1) colloidal silica,(2) a polymeric bridging agent,(3) an aromatic sulfonic acid, and(4) n-propyl amine;high solids coating compositions containing this additive have excellent shelf viscosity stability and finishes of such compositions and have excellent gloss and appearance and can be used as exterior finishes on automobiles and trucks.

Abstract: A rheology control additive of(1) colloidal silica and(2) a nonionic fluorocarbon polymer having ethylene oxide linkages and a weight average molecular weight of about 5,000-50,000 and contains about 2-25% by weight of fluorine; high solids coating compositions containing the additive have excellent rheology control and can be used as extension finishes on automobiles and trucks.

Abstract: A polymeric heat resistant photopolymerizable composition of a polyamide ester resin containing photopolymerizable groups useful for forming relief structures on electrical devices such as capacitors, integrated circuits, printed circuits and semiconductors; a solution of the composition is applied to a substrate such as a coated silicon wafer which is the base for an electrical device, dried to form a film, the film is exposed to radiation through a pattern and photopolymerized; the unexposed and unpolymerized part of the film is dissolved off and the resulting relief structure is converted to a polyimide structure with sharp definition and has good mechanical, chemical and electrical properties; to reduce radiation exposure time and increase the rate of photopolymerization the following constituents are used in the composition:radiation sensitive polymerizable polyfunctional acrylate compound and photopolymerization initiators containing hydrogen donor initiator and aromatic biimidazole, and an oxygen scave

Abstract: An improved spectrophotometer having a light source, a scanning type monochromator that provides light beams of different wavelengths over a light spectrum being scanned, and an object photometer for measuring the intensity of reflected light from an object being tested and generating an electrical signal proportional to the intensity of the light measured and connected to means for recording the signal as a function of wavelength measured, the improvement used therewith comprising:(a) a beam splitter that divides the beam exiting from the monochromator into first and second light beams, whereby the first beam is incident upon the object;(b) a reference photometer that measures the flux of the second light beam and generates an output electrical signal proportional to the intensity of the light measured; and(c) a light source control, connecting the reference photometer and the light source, which receives the electrical signal from the reference photometer and generates a feedback electrical signal to adjust

Abstract: The coating composition useful as the exterior finish on automobiles and trucks contains about 40-60% by weight of a binder of film-forming constituents and 30-60% by weight of a non-aqueous carrier; the binder is an film-forming resin containing reactive hydroxyl, carboxyl, amide, glycidyl groups or any mixture of such groups and an alkylated melamine formaldehyde crosslinking resin, in addition the composition contains about 0.1-10% by weight, based on the weight of the binder, of a rheology control additive of(1) colloidal silica and(2) a polyethylene glycol having a weight average molecular weight of about 800-400,000.

Abstract: An electrical device formed from a polymeric heat resistant photopolymerizable composition of a polyamide ester, resin containing photopolymerizable groups which forms a relief structures on electrical devices such as capacitors, integrated circuits, printed circuits, multilayer circuits or semiconductors; a solution of the composition is applied to a substrate such as a coated silicon wafer, dried to form a film, the film is exposed to radiation through a pattern and photopolymerized; the unexposed and unpolymerized part of the film is dissolved off and the resulting relief structure is converted to a polyimide structure with sharp definition and has good mechanical, chemical and electrical properties; to reduce radiation exposure time and increase the rate of photopolymerization the following constituents are used in the composition: a radiation sensitive polymerizable polyfunctional acrylate compound and a photopolymerization initiator of an aromatic biimidazole.

Abstract: An apparatus and process for automatically and rapidly making a paint having the color values of a standard paint; a computer is used which is connected to and controls a multiplicity of metering pumps that are each individually connected to a supply of components used to make the paint such as binder solution, solvent and colorants; the components are accurately metered into a mixing vessel and mixed, paint is circulated through a recycle loop attached to the vessel, the loop contains a cell having a viewing window through which the paint is pumped, a colorimeter views the cell and determines the color values of the wet paint and feeds these values back to the computer which compares the values to values of the standard paint and calculates the amount of colorant to be added and signals the metering pumps to add colorant, the process is repeated until the paint is brought within the tolerance values of the standard paint.

Abstract: A substrate that has a finish of a clear coat top layer in firm adherence to a color coat layer containing pigments that is in adherence to the substrate; the clear coat and color coat are formed from a high solids coating composition contains at least 50% by weight of a binder of film-forming constituents in which the constituents are of(A) a medium molecular weight acrylic polymer that has a number average molecular weight of about 5,000-20,000, a hydroxyl content of at least 2% by weight, a glass transition temperature of about -20.degree. C. to +20.degree. C.;(B) a low molecular weight acrylic polymer that has a number average molecular weight of about 500-7,500 a hydroxyl content of at least 2% by weight, a glass transition temperature of about -20.degree. C. to +25.degree. C.

Abstract: A thermosetting acrylic powder coating composition contains an acrylic copolymer of a methacrylic acid and at least one other monoethylenically unsaturated monomer, a crosslinking agent capable of reacting with carboxylic acid groups, a blend of an ultraviolet light stabilizer and an ultraviolet screener capable of preventing degradation of the coating by ultraviolet light and a flow control agent. Preferably, the composition is nonpigmented and provides a clear, glossy, and durable film useful as the clear coat of a clear coat/color coat automobile finish.

Abstract: The high solids coating composition contains at least 40% by weight of a binder of film-forming constituents in which the constituents are of(1) an acrylic polymer of styrene or methyl methacrylate or mixtures thereof, an alkyl acrylate or an alkyl methacrylate and a hydroxyl alkyl acrylate or methacrylate(2) a polyester polyol and(3) an alkylated melamine formaldehyde crosslinking agent and optionally, an acid catalyst;the composition is particularly useful as a primer or an exterior finish for automobiles, trucks, airplanes and can be used as an appliance finish and for coil coatings.

Abstract: A substrate having a cured color coat layer of a pigmented coating composition and a cured clear coat layer firmly adhered to the color coat layer; wherein the layers are formed from a high solids coating composition contains at least 40% by weight of a binder of film-forming constituents in which the constituents are of(1) an acrylic polymer of styrene or methyl methacrylate or mixtures thereof, an alkyl acrylate or an alkyl methacrylate and a hydroxyl alkyl acrylate or methacrylate,(2) a polyester polyol, and(3) an alkylated melamine formaldehyde crosslinking agent and optionally, an acid catalyst;the clear coat/color coat finish is particularly useful as an exterior finish for automobiles, trucks, and airplanes.

Abstract: A substrate of either metal or plastic which is coated with a crater resistant enamel coating composition is used for the exterior of trucks and automobiles; the binder of the coating composition is a blend of(A) an acrylic polymer having hydroxy groups and contains about 0.1-10% by weight of a polymerized perfluoro carbon constituent of the formula ##STR1## where R is H or CH.sub.3, R.sup.1 is alkyl, R.sup.2 is perfluoro alkyl and n is 0 or 1 and(B) an aminoplast crosslinking agent such as an alkylated melamine formaldehyde resin;The composition is applied and baked by conventional techniques, to form a finish on the substrate that has an excellent appearance.

Abstract: An air-dry acrylic lacquer capable of forming a low-color, non-yellowing finish with excellent adhesion to either lacquer or enamel-coated substrates is provided. The lacquer is composed primarily of poly(methyl methacrylate), a methyl methacrylate/ethyl acrylate/t-butylaminoethyl methacrylate terpolymer, cellulose acetate butyrate, and a polyester plasticizer. Ordinarily, the lacquer is nonpigmented and provides a clear, glossy and durable film useful as the clear coat of a color coat/clear coat automotive finish.

Abstract: A process for embossing flexible polymeric substrates in a dielectric heating press having a platen and a design fixture by placing an insulating blanket of a composite sheet structure between the substrate being embossed and the platen of the press and embossing the substrate; wherein the composite sheet structure is an aromatic polyamide fabric coated on both sides with a 2-30 mil thick layer of a fluorosilicone rubber and having a dielectric constant of about 4-8 and a dissipation factor of about 0.015-0.030; the polymeric substrates generally are laminates of thermoplastic polyurethane form/short napped synthetic velour fabric used as upholstery for automobiles and trucks.

Abstract: A thermosetting coating composition having a binder of a film forming polymer having reactive hydroxyl groups, epoxy groups or methylol groups and a melamine, benzoguanamine or urea crosslinking agent and about 0.1-10% by weight of reactive catalyst which is a solid at 30.degree. C. in which the catalyst has one of the following structures: ##STR1## or mixtures of the above; where R is an alkyl group or a hydroxy alkyl group having 1-18 carbon atoms; the catalyst is prepared by reacting in a 1:1 molar ratio trimellitic anhydride and an aliphatic monohydric alcohol or an aliphatic diol.

Abstract: A high solids acrylic dispersion lacquer coating composition having an acrylic polymer binder content of about 25-45% by weight in a nonaqueous medium; wherein the acrylic polymer is a blend of(1) Polymer A of methyl methacrylate and a polymerized monomer of allyl methacrylate, alkyl amino alkyl methacrylate or mixtures thereof;(2) Copolymer B of methyl methacrylate and an alkyl acrylate having 6-12 carbon atoms in the alkyl group; and(3) A graft copolymer of Polymer A which forms a backbone of the graft copolymer and Copolymer B attached to the backbone which forms side chains of the graft copolymer; andwhereinthe nonaqueous medium is a blend of(a) an aliphatic solvent which at 25.degree. C. is a nonsolvent for Polymer A and a solvent for Copolymer B; and(b) a coalescing solvent for the binder;the composition is useful as an exterior finish for automobiles and trucks.

Abstract: An improved process for forming relief structures on electrical devices such as capacitors, integrated circuits, printed circuits and semiconductors; a solution of a composition a polymeric heat resistant photopolymerizable composition of a polyamide ester resin containing photopolymerizable groups is applied to substrate such as a coated silicon wafer, which forms the base an electrical device, and is dried to form a film, the film is exposed to radiation through a pattern and photopolymerized; the unexposed and unpolymerized part of the film is dissolved off and the resulting relief structure is converted to a polyimide structure having a sharp definition and good mechanical, chemical and electrical properties; to reduce radiation exposure time and increase the rate of photopolymerization the following constituents are used in the composition:a radiation sensitive polymerizable polyfunctional acrylate compound and a photopolymerization initiator of an aromatic biimidazole.

Abstract: The weatherability and durability of clear coat/color coat finishes can be significantly increased by incorporating one or more ultraviolet light stabilizers into the color coat.

Abstract: A composite sheet structure of an aromatic polyamide fabric coated on both side with a 2-30 mil thick layer of a fluorosilicone rubber and having a dielectric constant of about 4-8 and a dissipation factor of about 0.015-0.030; the composite structure is useful as an insulating blanket that is used in a dielectric press to emboss laminates of thermoplastic polyurethane foam/short napped synthetic velour fabric used as upholstery for automobiles and trucks.