摘要:
A polyurea resin molding composition for RIM use comprising (a) polyoxyalkylenpolyamine having an average molecular weight greater than about 400 and a plurality of terminal primary or secondary amino groups, (b) an aromatic polyamine and/or xylylenediamine and (c) a polyisocyanate. The component (a) contains dispersed therein a polymer prepared by the in situ polymerization of at least two different olefinically unsaturated monomers in the presence of a radical polymerization initiator, the ratio of the average amino equivalent of said polyamines (a) and (b) in combination to the average NCO equivalent of said polyisocyanate (c) being between about 1:0.7 to 1:1.5.
摘要:
A stable polymer dispersion in polyoxyalkylenepolyamine is provided by the in situ polymerization of at two different monomers selected respectively from (a) a first monomer capable of forming a homopolymer which does not precipitate out upon the in situ polymerization and (b) a second monomer capable of forming a homopolymer which precipitates out upon the in situ polymerization. The dispersion is useful as a raw materials of polyurea RIM, forms, elastomers and other products.
摘要:
A polyurea resin molding composition for reaction injection molding use which comprises (a) a polyoxyalkylenepolyamine, (b) an aromatic polyamine and/or a xylylenediamine and (c) a polyisocyanate, wherein either one or both of components (a) and (b) have been modified by a Michael reaction with an unsaturated compound of the formula CH.sub.2 .dbd.C(R)--Y wherein R is H or CH.sub.3 and Y is an electron attracting group. The use of such modified polyamine(s) improves in-mold flow and green strength characteristics.
摘要:
Trifunctional polyoxyalkylene polyamines having a plurality of 2-alkoxycarbonylethylamino groups at terminals are produced by reacting the corresponding primary amines with an alkyl acrylate. The trifunction secondary polyamines thus produced have a moderate reaction rate with a polyisocyanate component in polyurea RIM.
摘要:
Polyoxyalkylene polyamine or aromatic diamines or xylylenediamines are modified by them to the Michael reaction with an ethylenically unsaturated monomer having an electron-withdrawing group to convert the primary amino groups at least in part to a secondary amino group of the formula:--NH--CH.sub.2 --CH(R)--Ywherein R is a hydrogen atom or methyl, and Y is an electron-withdrawing group. The modified amines find use in the manufacture of plastics such as polyurea elastomers or polyurea RIM.
摘要:
A polyurea resin composition for RIM or coating use Comprises (a) a polyoxyalkylenepolyamine, (b) an aromatic polyamine and/or a xylylenediamine and (c) a polyisocyanate compound with either one or both of components (a) and (b) having been modified by a Michael reaction with a vinyl monomer having an electron attracting group to convert the primary amino group thereof to a secondary amino group. The composition also contains as an internal mold release a polyoxyalkylene glycol mono-C.sub.4 -C.sub.1, alkyl ether and/or as a polyamine component a reaction product between a primary aromatic polyamine and a polyglycidyl ether.
摘要:
A reactive injection molding resinous composition which is excellent in molding, properties and capable of resulting an injection-molded polyurea product having both excellent heat resistance and impact strength is provided, the resinous composition comprising, as polyamine components:(1) a polyoxyalkylene polyamine having an average molecular weight of 1,000-10,000 and 2 or more aliphatic amino groups,(2) a polyoxyalkylene polyamine product (A) obtained by the reaction of a polyoxyalkylene polyepoxy compound having an average molecular weight of 1,000-10,000 and an aromatic diamine having a molecular weight of 108-400,(3) a polyoxyalkylene polyamine product (B) obtained by the reaction of a polyoxyalkylene polyepoxy compound having an average molecular weight of 270-1,000 and an aromatic diamine having a molecular weight of 108-400, and(4) an aromatic diamine having at least one alkyl or thioalkyl substituent at the ortho position of respective amino group and an average molecular weight of 122-400, and as polyisocyanate components,(5) an aromatic polyisocyanate compound having an average molecular weight of 174-1,500,(6) an aliphatic polyisocyanate compound having an average molecular weight of 158-1,500, and(7) a liquid polyisocyanate prepolymer product obtained by the reaction of said (5) or (6) and a liquid polydiene compound having an average molecular weight of 1,000-5,000 and having 2 or more reactive functional groups selected from HD, amino, carboxyl and epoxy groups.
摘要:
Disclosed is a method for forming a glittering coating film in which after a glittering base coating film is formed on a substrate to be coated by applying thereto a glittering base coating material containing a colloid particle liquid containing noble metal or copper colloid particles, said glittering base coating film is heated or set, and then a clear coating film is formed by executing any one of the following processes (A) to (F). By the method, a glittering coating film is provided which has weathering resistance and high gloss, and develops a metal feeling or a coloring metal feeling giving rise to a less feeling of metal particles than by the plating-tone coating film, and superior in design property. (A) a process of forming and heating a top clear coating film by applying a clear coating material thereto, and heating the formed top clear coating film; (B) a process of forming and heating a glittering clear coating film by applying thereto a glittering clear coating material containing a glittering material, which is different from said noble metal or copper colloid particles; (C) a process of forming and heating a glittering clear coating film by applying thereto a glittering clear coating material containing a glittering material, which is different from said noble metal or copper colloid particles, and then forming and heating a top clear coating film by applying a clear coating material thereto; (D) a process of forming and heating a matting clear coating film by applying thereto a matting clear coating material; (E) a process of forming and heating a top color clear coating film by applying thereto a color clear coating material; and (F) a process of forming and heating a glittering clear coating film by applying thereto a glittering clear coating material containing a glittering material, which is different from said noble metal or copper colloid particles, and then applying a color clear coating material to form a top color clear coating film, and heating the resultant.
摘要:
A lustrous electromagnetic wave transmissive coating film includes: metal nano-particles containing one or more kinds of metals; and a first resin containing an oxazoline group and, a second resin containing a carboxyl group, in the resin component the carboxyl group derived from the second resin being present in a molar ratio of 0.03 to 50 times the oxazoline group derived from the first resin; wherein the resin component is soluble in ethanol, or, when water is added to a diethylene glycol diethyl ether solution obtained by dissolving 0.5 g of the resin component in 10 ml of diethylene glycol diethyl ether, an addition amount of the water until the diethylene glycol diethyl ether solution becomes turbid is 1.5 ml or more.
摘要:
A method for forming a glittering coating film in which after a glittering base coating film is formed on a substrate to be coated by applying thereto a glittering base coating material containing a colloid particle liquid containing noble metal or copper colloid particles, the glittering base coating film is heated or set, and then a clear coating film is formed. By the method, a glittering coating film is provided which has weathering resistance and high gloss, and develops a metal feeling or a coloring metal feeling giving rise to a less feeling of metal particles than by the plating-tone coating film, and superior in design property.