摘要:
An addition type imide resin prepolymer is obtained by a reaction of unsaturated bisimide of 1.0 mol to diamine of 0.25 to 0.43 mol and an addition of polyamine having three or more benzene rings. The prepolymer is thereby made to contain substantially no unreacted diamine component which affects human body of operators, and to have remarkably excellent heat resistance and adhesive properties, while effective to restrain a production of any component of a molecular weight exceeding 15,000.
摘要:
A process for producing an unsaturated dicarboxylic acid imide compound of formula (I): ##STR1## wherein D represents a divalent organic group having at least one carbon/carbon double bond; R.sup.1 represents an n-valent organic group having at least one carbon atom; and n is an integer of 1 or above, which comprises reacting an unsaturated amide acid compound of formula (II): ##STR2## wherein D, R.sup.1, and n are as defined above, with an orthoester of formula (III): ##STR3## wherein R.sup.2 and R.sup.3, which may be the same or different, each represents a monovalent organic group having at least one carbon atom, to form an unsaturated dicarboxylic acid amide acid ester compound of formula (IV): ##STR4## wherein D, R.sup.1, R.sup.3, and n are as defined above, and then imidating the compound of formula (IV).
摘要:
A color inspection system capable of making a determination on pass or failure with accuracy equivalent to that for the case of a visual inspection even in the case of inspecting various textile products as measurement targets, such as raised cloth, cloth with printed patterns such as a marbled pattern, moire pattern and detailed pattern is provided. With the color inspection system, an illuminant is set to shine a light on the surface of a textile product placed on the top surface of a measuring platform to thereby make measurements from a direction at an angle of 45 degrees from the surface of a measuring region of the textile product by use of a spectroradiometer of a measuring unit. The spectroradiometer is provided with a wide range lens attached thereto to thereby expand a measuring region. The results of measurement by the spectroradiometer are inputted to an information processor of a determination unit. The information processor computes color values for the whole measuring region to be compared with standard color values stored in a memory to thereby make a determination on pass or fail.
摘要:
In a process for manufacturing a prepreg for use as an electrically insulating material, a main epoxy resin composition and a subsidiary resin composition containing a hardener which have been separately filtered and metered are quickly mixed into a mixture resin composition, a reinforcing member is coated with a uniformly thin film of the mixture resin composition by a die coater under specific temperature, average residence time and low shear conditions, the coated reinforcing member is heated in non-contact manner by an infrared ray heater to have the member impregnated with the resin composition of the film, the member is further heated in non-contact manner by a floating dryer to have the resin composition semi-hardened, and the member is unified through compaction rolls, whereby the prepreg in the form of a sheet-shaped fiber reinforced composite material is continuously manufactured.
摘要:
Superior polyimide prepolymers particularly suitable for fabrication of multi-layer printed boards are produced by reacting unsaturated bisimides with diamines to consist essentially of 41-55% of unreacted reactants, 39-54% of components having a molecular weight of between 400 and 15,000, and 3.0-6.8% of components having a molecular weight of more than 15,000. The resulting prepolymers enable the preparation of their solution having enough working life for successfully impregnating a given substrate therewith in the preparation of prepregs. The prepregs, prepared from the above prepolymers in such a way as to contain within the resin content thereof 29-35% of unreacted reactants, 51-65% of the components having a molecular weight of between 400 and 15,000, and 5-14% of the components having a molecular weight of more than 15,000, allow the fabrication of laminate products with remarkable dimension stability under a low molding pressure to eliminate the presence of voids in the products, in addition to that the prepregs ensure a high bond strength as well as elongated working life which is responsible for prevention of a blister in the finished laminate and for easy control of the laminate forming process.
摘要:
The objective of the invention is to provide a color inspection system capable of making determination on pass or failure with accuracy equivalent to that for the case of visual inspection even in the case of inspecting various textile products as measurement targets, such as a raised cloth, cloth with printed patterns such as marbled pattern, moire pattern and detailed pattern, and so forth. With a color inspection system, an illuminant is set to shine light on the surface of a textile product M placed on the top surface of a measuring platform to thereby make measurements from a direction at an angle of 45 degrees from the surface of a measuring region of the textile product M by use of a spectroradiometer of a measuring unit. The spectroradiometer is provided with a wide range lens attached thereto to thereby expand a measuring region. The results of measurement by the spectroradiometer are inputted to an information processor of a determination unit. The information processor computes color values for the whole measuring region to be compared with standard color values stored in a memory to thereby make determination on pass or fail.
摘要:
An epoxy resin composition featured in containing, in a matrix of an epoxy resin having more than two epoxy groups in each molecule, a phenolic hardening agent having more than two phenolic hydroxyl groups in each molecule, an organobis(N-dialkylurea) hardening promotion agent, a solvent for the hardening promotion agent, and a guanamine compound, and capable of obtaining a prepreg excellent in the preservation stability and, less causing a solvency errosion (halo phenomenon) due to an infiltration of plating solution along boundaries between a printed copper circuit formed in an inner-layered circuit board and a resin forming the prepreg, is realized.
摘要:
A surface treatment of a glass fabric used for a fiber reinforced composite such as multilayer circuit boards comprises the steps of exposing the glass fabric to an atmospheric pressure plasma of a mixture gas to obtain a plasma-treated surface of the glass fabric, and coating an organosilane compound on the plasma-treated surface. The mixture gas contains as a reaction gas at least one of an oxidative gas and a fluorine-containing gas, and a rare gas as a carrier of the reaction gas. The mixture gas is pre-heated prior to the plasma excitation thereof. When the glass fabric includes an organic compound as a sizing agent, the organic compound can be efficiently removed from the glass fabric by the exposing step. For example, the organosilane compound can be coated on the plasma-treated surface by exposing the plasma-treated surface to a second atmospheric pressure plasma of a second mixture gas containing an organosilane monomer. The surface treatment of the present invention is useful to efficiently produce a multilayer circuit board having excellent adhesion between the glass fabric and a resin, and resistance to CAF (Conductive Anodic Filaments).
摘要:
An epoxy resin composition containing one or a mixture thereof selected from the group consisting of poly-p-vinyl phenol and its halides, and a compound selected from the group consisting of the following compounds: (a) Sn salt of organic acid wherein at least one organic group is bonded with Sn atom; (b) alcoxy-containing silane compound represented by the general formula, (R'--).sub.n --Si--(--OR).sub.4-n, wherein R' denotes the alkyl group or the allyl group, R denotes the normal chain or branched alkyl group, and n denotes 0 or an integer of 1-4; and (c) aluminic acid ester represented by the general formula, [Al(OR).sub.3 ].sub.n, wherein n denotes an integer of 1-5, and R denotes the alkyl group or allyl group. The present invention further includes a method for preparing an epoxy resin prepreg using the above epoxy resin composition.