Abstract: The present invention provides a lamp cover comprising (1) a thermoplastic resin having a visible light transmissivity of 50% or higher measured in a form of a plate-like molded body having a thickness of 2 mm according to JIS R 3106, (2) a composite tungsten oxide, (3) at least one material selected from the group consisting of a metal soap, an antioxidant, and a first selective wavelength absorbing material having a maximum absorption wavelength within a range of 200 to 350 nm, whose content is 0.03% by mass or more based on a total content (100% by mass) of the components (1) to (4), and (4) a second selective wavelength absorbing material having a maximum absorption wavelength within a range of 450 to 550 nm.

Abstract: The invention provides a process for preparing polyether carbonate polyols by addition of alkylene oxides and carbon dioxide onto H-functional starter substance in the presence of a double metal cyanide (DMC) catalyst or in the presence of a metal complex catalyst based on the metals zinc and/or cobalt, wherein (?) alkylene oxide and carbon dioxide are added onto H-functional starter substance in a reactor in the presence of a double metal cyanide catalyst or in the presence of a metal complex catalyst based on the metals zinc and/or cobalt, wherein a reaction mixture comprising the polyether carbonate polyol is obtained, and wherein (?) the reaction mixture obtained in step (?) remains in the reactor or is transferred continuously into a postreactor, wherein the content of free alkylene oxide in the reaction mixture is reduced in each case in the manner of a postreaction, characterized in that a component K is added during the postreaction, component K being selected from at least one compound containing a p

Abstract: The present disclosure is directed to, in part, an aliphatic polycarbonate polymerization reaction initiated by combining an epoxide with carbon dioxide in the presence of a catalytic transition metal-ligand complex to form a reaction mixture, and further quenching that polymerization reaction by contacting the reaction mixture with an acid containing a non-nucleophilic anion produces a crude polymer solution with improved stability and processability.

Abstract: The present invention relates to new condensation resins formed from urea, formaldehyde and CH-acidic aldehydes, to processes for preparing them, and to use thereof.

Abstract: The present invention provides a curable coating composition that includes at least three components. The coating composition includes a component (a) having at least one carbamate group or urea group and having a lactone or hydroxy carboxylic acid moiety. The second component (b) of the coating composition is the reaction product of a polyol having at least one branch point, i.e., carbon bonded to at least three other carbons, with a lactone or hydroxy carboxylic acid. The third component of the coating composition is a curing agent that is reactive with the first two components. Preparation of coated articles using the compositions of the invention is also disclosed.

Abstract: The invention pertains to compositions which can be coated onto substrates. These compositions include a combination of a resin blend comprising a first polyester resin and a second polyester resin, wherein the first polyester is different from the second polyester, an aminoplast crosslinking resin, an acid catalyst, and a urea-aldehyde resin. Films prepared from coating compositions made in accordance with the present invention having improved stain resistance. In many instances, films prepared from coating compositions made in accordance with the present invention not only have improved stain resistance, but also have low temperature flexibility.

Abstract: To provide novel polycarbonates and a manufacturing method for them.Copolycarbonates obtained by copolymerizing at least two aromatic dihydroxy compounds and a compound capable of introducing carbonate links. Preferably, they contain, as the components derived from the aromatic dihydroxy compounds, constituent units described by formulas [I] and [II] in proportions of from 8.times.10.sup.-5 to 3.times.10.sup.-2 moles of [II] per mole of [I], and preferably they have a limiting viscosity number [.eta.] of from 0.2 to 1.2 dL/g, as measured in methylene chloride at 20.degree. C. ##STR1## (X, Y,: Alkylene, cycloalkylene, --O--, --S--, --SO--, OR --SO.sub.2 --. R.sup.1, R.sup.2, R.sup.7, R.sup.8 : hydrocarbon group with from 1 to 10 carbon atoms which may be substituted with halogen; or a halogen atom. m, n, p: Integers ranging from 0 to 4, indicating the number of substituents. q: Integer ranging from 0 to 3, indicating the number of substituents. R.sup.

Abstract: Low molecular weight urea-formaldehyde reaction products are provided. Such products exhibit cold water solubility. They find use as a sustained nitrogen-release source for animals and plants. A three-stage process is provided for preparing the reaction products. The first stage comprises reacting urea and formaldehyde in an alkaline, alcoholic solution. Then the solvent is distilled off to form a melt. In the final stage the melt is polymerized to form the cold water soluble, low molecular weight reaction product.

Abstract: Urea-formaldehyde resins, particularly useful for producing particle boards having lower rates of release of formaldehyde are synthesized in several stages including a stage of further condensing a first condensate having a F/U molar ratio of 1.8-2.3 and which was condensed at a pH of between 6 and 8. The further condensing is conducted at a pH of between 6 and 8 until a cloud point with water is reached at 10.degree.-40.degree. C. making it possible to obtain resins which are reactive and stable during storage.

Abstract: A glue composition comprises a heat-hardenable resin, urea and possibly one or several glue additives, and is characterized by the presence of an additional gluing compound is polyol having a functionality of at least equal to three. This glue can be used for mineral fibers in the manufacture of insulation products having improved properties.

Abstract: The preparation of aminoplastic resins containing melamine, having very low rates of formaldehyde emission, and being particularly useful for the production of particle boards. In a second stage of the process for preparing the resin, additional NH.sub.2 (melamine and urea) is added to a conventional condensate solution at an increased pH between 6 and 9 so as to lower the F/NH.sub.2 molar ratio to between 0.5 and 0.9. Urea is added in a third stage to obtain an F/NH.sub.2 of between 0.30 and 0.50, with the optional addition of borax.

Abstract: Curing aminoplastic resins containing urea and melamine by adding as the curing catalyst, a triazinone derivative.

Abstract: Novel anionic polymeric hydrogels based on sulfonated amino aldehyde resins and a process for preparing such hydrogels are described. The hydrogels may include poly(N-vinyl 2-pyrrolidone) and other additives. Such hydrogels may be prepared by a four step process in which melamine and/or urea are reacted with formaldehyde, sulfonated, condensed to form a viscous gel and dried.

Abstract: A tanning assistant useful in particular for tanning in combination with aluminum tanning agents is obtained by condensing melamine with glyoxal and/or glyoxylic acid and optionally with an aromatic compound which has a phenolic hydroxyl group or optionally with a condensable nitrogen compound.

Abstract: A process for the manufacture of a solid urea-formaldehyde resin comprises steps (a) to (d). Step (a), the initial reaction step is carried out under specified conditions with an F:U ratio of at least 2.5 to 1. The F:U ratio is lowered by addition of urea in step (c) and water is evaporated without precipitation of the resin in step (d).

Abstract: A composition of matter useful as a high solids coating is disclosed. The composition contains at least one fatty polyol derived by ring-opening an epoxidized fatty alcohol or ester, and at least one methylolamino curing agent. The coatings from these compositions have increased flexibility as compared to coatings prepared from comparable polyols.

Abstract: An amino-formaldehyde moulding composition is made by compounding togetheran aqueous amino-formaldehyde resin solution to provide 0 to 90 percent by weight of the resin component of the composition, filler to make up 20 to 60 percent by weight of the moulding composition andUF resin which had a low degree of condensation, is solid at room temperature, contains a modifier and makes up 4 to 80 percent by weight of the moulding composition.The moulding compositions themselves are also claimed.

Abstract: A U.F. foam that is diamensionally stable, but low in formaldehyde, was made by adding to a conventional solution of a urea formaldehyde resin precondensate, before foaming, up to 50% urea, relative to the solid resin substance, and one or several connecting agents from the group of sulfurous alkyl compounds, saturated monobasic carbonic acids, saturated and unsaturated dicarbonic acids, purine compounds, inorganic acids of the group of halogens and chalcogens, and their salts, phosphoric acids and their salts, alkali metal salts and alkaline earth metal salts, in such quantity and in such a way that the pH of the resulting solution remains above 7; and subsequently foaming the solution with a hardener/foaming-agent solution in the conventional manner.

Abstract: To obtain a UF foam which is low in formaldehyde, yet is dimensionally stable, up to 96% urea is dissolved in an approximately 10 to 30% aqueous extract of an alkyl, aryl or alkaryl sulphonic acid, said solution being mixed with a conventional hardener/foaming agent solution containing the sodium salt of an alkyl, aryl or alkaryl sulphonic acid in an aqueous diluent usually employed for foaming, in a ratio sulphonic acid solution to sodium sulphonate solution of 1:1 to 1:4, the pH value being adjusted to 0 up to 3 and said mixture being foamed together with a urea formaldehyde resin precondensate solution in the usual manner.

Abstract: Process for preparing a urea-formaldehyde resin in an aqueous formulation particularly intended for use as a particleboard binder. The resin cures to be low emitting. In the cured state, the resin has more than twice as many methylene groups as methylene ether groups, and generally is characterized by residual formaldehyde that is at least 40% and often 50% less than that of a cured resin of the same F/U mole ratio but produced by an initial base catalyzed methylolation procedure of which the primary prepolymer products are mostly monomethylol and dimethylol urea precursors, followed by condensation.

Abstract: An improved molding composition is provided comprised of an oxymethylene polymer, a blocked or unblocked isocyanate compound in an amount ranging from about 0.2 to 2.0 percent by weight based on the weight of the polymer, a filler and an isocyanate-active catalyst. Shaped articles can be produced from the composition which exhibit desirable mechanical properties without the need for fibrous reinforcing agents.

Abstract: A process for the production of an air-drying, modified amino-resin, which process comprises co-polycondensing one or more dialkyl ether compounds, which are dialkyl ether of the dimethylol derivatives of compounds containing two primary amido groups or similar groups, with at least one compound containing an auto-oxidative group, or polycondensing the said one or more dialkyl ether compounds and reacting the compound containing an auto-oxidative group with the condensate; the alcohol released being removed from the mixture. The auto-oxidative groups are typically supplied by allyl ethers and the dialkyl ether compound is e.g. bismethoxymethylene urea. The modified resins rapidly form hard films when exposed to atmospheric oxygen in the presence of drying agents.

Abstract: Alkylated glyoxal/cyclic urea condensates are excellent formaldehyde-free crosslinking resins for textile fabrics.

Abstract: Alkylated glyoxal/cyclic urea condensates are excellent formaldehyde-free crosslinking resins for textile fabrics.

Abstract: An improved process for the preparation of alkoxylated formaldehyde-amino compound resins. By using a sequential procedure, and an alkanol of up to 8 carbon atoms it is possible to remove both the water in the aqueous formaldehyde used and the water from the alkoxylation reaction azeotropically. The products of this invention afford resins of better quality, especially in terms of color and clarity, than the products derived from alcoholic formaldehyde solutions.

Abstract: Alkylated glyoxal/cyclic urea condensates are excellent formaldehyde-free crosslinking resins for textile fabrics.

Abstract: Alkylated glyoxal/cyclic urea condensates are excellent formaldehyde-free crosslinking resins for textile fabrics.

Abstract: The invention relates to a process for the production of urea/formaldehyde adhesives and to the adhesives thus obtained.According to the invention, an inorganic salt is mixed with a source of formaldehyde, the resulting mixture is heated and reacted with urea to initiate polymerization in an acid medium, the polymerization reaction is stopped when the mixture has reached the required viscosity, the mixture is cooled, urea is added to the mixture during cooling and the adhesive is obtained after cooling.The adhesives obtained may be used in the production of agglomerated or laminated panels of wood.