摘要:
Pigmented molding compositions having good weatherability for sheet and bulk molded articles are made by mixing a resin component comprising an unsaturated polyester, a monomer which will react with the polyester and a non-aromatic, thermoplastic polymer; an ultraviolet light absorbing material and/or a hindered amine light stabilizing material; a pigment; and a reinforcing agent.
摘要:
The present invention relates to a method for forming the LCP composite having LCP fibers dispersed in the matrix resin even if the LCP content may be smaller than the lower limit of the fiber formable range.The method is characterized in that a resin composite reinforced by the LCP fiber in a mixture ratio beyond the fiber formable range or the preferred fiber formable range by means of an extrusion or injection molding of a resin mixture containing a liquid crystal resin composite extruded in the fiber formable range or the preferred fiber formable range.
摘要:
There are disclosed an adhesive obtained by dispersing a cured amino resin fine powder soluble in acid or oxidizing agent into an uncured heat-resistant resin matrix hardly soluble in acid or oxidizing agent when being subjected to a curing treatment as well as a printed circuit board using this adhesive and a method of producing the same. The adhesive has excellent properties such as resistance to chemicals, heat resistance, electric properties, hardness and adhesion property owing to the use of the amino resin fine powder. Therefore, the printed circuit board using such an adhesive is not influenced by service circumstance and is high in the connection reliability without forming short circuit between patterns. Furthermore, in the method of producing the printed circuit board, the adhesive is provided in form of a sheet or a prepreg, whereby the printed circuit board can be produced easily and cheaply.
摘要:
An epoxy resin composition for forming prepregs is disclosed which includes an epoxy resin having at least two epoxy groups, a latent curing agent for the epoxy resin in an amount of 0.5-3.0 equivalents per equivalent of the epoxy groups of the epoxy resin, and a reactive, viscosity-increasing agent in an amount of 0.2-3.0 parts by weight per 100 parts by weight of the epoxy resin. The epoxy resin composition has an initial viscosity n.sub.I(50) at 50.degree. C. of 1,000-200,000 cP and an initial viscosity n.sub.I(23) at 23.degree. C. of at least 10,000 cP.
摘要:
Fluorinated polymeric composition exhibiting low dielectric constant and a low coefficient of thermal expansion containing a fluorinated polymeric material and a silica and/or quartz filler having a mean particle size of no greater than 7 microns, and use thereof to form a substrate having vias therein. Layers of the above composition are obtained by applying the composition to a substrate and then heating the composition to a temperature sufficient to cause the composition to fuse.
摘要:
Fibers and plastic materials reinforced with these fibers which have a diameter that varies along the fiber axis are provided. The fibers increase the strength of the material by reducing fiber pull out from the plastic matrix. The variation in diameter results in an undulating surface on the fiber which locks it into the matrix.
摘要:
A strand prepreg which comprises (i) a resin composition comprising 100 parts by weight of thermosetting resin having a softening point of 60.degree. C. or less and about 5 to 60 parts by weight of epoxy resin having a number average molecular weight of 5,000 or more and (ii) about 20 to 80% by volume strands of carbon fibers, glass fibers, aromatic polyamide fibers and the like, wherein the strands are impregnated with the resin composition.
摘要:
An aqueous alkaline dispersion of a rubbery vinyl pyridine copolymer, trimethylol phenol, and a resorcinol compound, in certain amounts is useful in forming an adhesive for bonding polyamide or nylon cords to rubber compounds or stocks. After dipping the cord in the adhesive dip, the coated cord is heated to dry it and heat cure or heat set the adhesive on the cord. Thereafter, the adhesive containing cord is combined or laminated (calendered) with a curable rubber compound and the resulting assembly is cured. High H-adhesions are obtained with this one-step or single treatment coating dip. It is particularly useful for bonding crystalline polyamides having a large number of aromatic groups in the polymeric structure, e.g., "Fiber B."
摘要翻译:一定量的橡胶状乙烯基吡啶共聚物,三羟甲基苯酚和间苯二酚化合物的水性碱性分散体可用于形成用于将聚酰胺或尼龙帘线粘合到橡胶化合物或原料的粘合剂。 将帘线浸入粘合剂浸渍后,将涂覆的帘线加热干燥,并将粘合剂热固化或热固定在帘线上。 此后,将含粘合剂的帘线与可固化的橡胶化合物组合或层压(压延),并将所得组合物固化。 通过该一步或单次处理涂层浸渍获得高H粘连。 在聚合物结构中结合具有大量芳族基团的结晶聚酰胺是特别有用的,例如“Fiber B.
摘要:
Solid curable polyester resin compositions comprising a filler or fibrous reinforcements impregnated with a solid solution of a crystalline polyester and crosslinking agent therefor are prepared by:A. mixing a liquid crosslinking agent with a solid crystalline polyester which is insoluble in said crosslinking agent at room temperature;B. heating the mixture of said solid crystalline polyester and liquid crosslinking agent to a temperature at which said polyester dissolves in said crosslinking agent and a temperature which is below that at which the polyester and crosslinking agent cure;C. forming a solid solution of said polyester and crosslinking agent by cooling the heated mixture thereof; andD. mixing with the polyester and crosslinking agent prior to the formation of said solid solution one or more of a filler, fibrous reinforcements or amorphous polyester.