摘要:
A novel cycloolefin copolymer that can be employed in the production of molding with fewer defects, for example, fewer gel particles (fish eyes). There is provided a cycloolefin copolymer comprising 80 to 20 mol % of repeating units derived from an α-olefin monomer and 20 to 80 mol % of repeating units derived from at least one cycloolefin monomer selected from the group consisting of monomer of the general formula (I), monomer of the general formula (II), monomer of the general formula (III), monomer of the general formula (IV) and monomer of the general formula (V), wherein with respect to the repeating units derived from cycloolefin monomer, the proportion thereof being present in the form of dimer (Rd) is 50 mol % or below and the proportion thereof being present in the form of trimer (Rt) 5 mol % or above.
摘要:
The present invention provides an insulating sheet which is excellent in handleability when it is uncured, and provides a cured product excellent in dielectric breakdown characteristics, thermal conductivity, heat resistance, acid resistance, and processability, and a multilayer structure produced by the use of the insulating sheet. The insulating sheet comprising: (A) a polymer having a weight average molecular weight of 10,000 or more; (B) at least one of an epoxy resin (B1) having a weight average molecular weight of less than 10,000 and an oxetane resin (B2) having a weight average molecular weight of less than 10,000; (C) a curing agent; and (D) at least one of magnesium carbonate anhydrous (D1) represented by MgCO3 and containing no crystal water and a coated body (D2) obtainable by coating the surface of the magnesium carbonate anhydrous (D1) with an organic resin, a silicone resin, or silica.
摘要:
A novel cycloolefin copolymer that can be employed in the production of molding with fewer defects, for example, fewer gel particles (fish eyes). There is provided a cycloolefin copolymer comprising 80 to 20 mol % of repeating units derived from an α-olefin monomer and 20 to 80 mol % of repeating units derived from at least one cycloolefin monomer selected from the group consisting of monomer of the general formula (I), monomer of the general formula (II), monomer of the general formula (III), monomer of the general formula (IV) and monomer of the general formula (V), wherein with respect to the repeating units derived from cycloolefin monomer, the proportion thereof being present in the form of dimer (Rd) is 50 mol % or below and the proportion thereof being present in the form of trimer (Rt) 5 mol % or above.
摘要:
A machine tool with an automatic tool changer having a tool storage magazine accommodating tools having the same shank configuration as that of the first shank, tools having the same configuration as that of the second shank, and a tool adaptor which has the same configuration as the larger of the first shank or second shank and which incorporate the smaller shank sections of the tools of the first shank or second shank configuration.
摘要:
It is the object of the present invention to provide a retardation film comprising a norbornene type copolymer, being excellent in heat resistance, low specific gravity, low birefringence, low photoelasticity, and low chromatic dispersion and having high performance of retardation compensation.The present invention is a retardation film, which comprises a norbornene type copolymer composition containing a norbornene type copolymer containing 40 to 60% by mole of a repeating unit derived from at least one kind of a norbornene type monomer selected from a group consisting of a monomer represented by the general formula (I), a monomer represented by the general formula (II), a monomer represented by the general formula (III), a monomer represented by the general formula (IV) and a monomer represented by the general formula (V), and 60 to 40% by mole of a repeating unit derived from an acyclic olefin type monomer, a stretched film obtained by forming the norbornene type copolymer composition in a film form and then stretching the film two times as large while heating the film to a glass transition temperature determined by a dynamic viscoelasticity, having an in-plane birefringence value Δn defined by the following formula in a range of 0.0033 or higher: Δn=|nx−ny|
摘要:
The present invention provides an insulating sheet which is used for bonding a heat conductor having a thermal conductivity of 10 W/m·K or higher to an electrically conductive layer. The handleability of the insulating sheet is excellent when it is uncured, and a cured product of the insulating sheet has higher adhesion, heat resistance, dielectric breakdown characteristics, and thermal conductivity. The insulating sheet used for bonding a heat conductor having a thermal conductivity of 10 W/m·K or higher to an electrically conductive layer comprises: (A) a polymer having an aromatic skeleton and a weight average molecular weight of 10,000 or more; (B) at least one of an epoxy monomer (B1) having an aromatic skeleton and a weight average molecular weight of 600 or less and an oxetane monomer (B2) having an aromatic skeleton and a weight average molecular weight of 600 or less; (C) a curing agent composed of a phenol resin, an acid anhydride having an aromatic skeleton or an alicyclic skeleton, a hydrogenated product of the acid anhydride, or a modified product of the acid anhydride; and (D) a filler. When the insulating sheet is uncured, the insulating sheet has a glass transition temperature Tg of 25° C. or lower.
摘要:
A multi-layer sheet of the present invention comprises a thermoplastic resin foam sheet, a reinforcing sheet layered on integrated with at least one side of the thermoplastic resin foam sheet; the reinforcing sheet being formed by a non-woven fabric which comprises non-meltable fibers which are interwound with one another and which are bound together with a thermoplastic resin, the thermoplastic resin foam sheet having an aspect ratio Dz/Dxy of bubbles of 1.2 or more, and an expansion ratio of 5˜50 cc/g, and therefore the sheet is excellent in bending strength, compressive strength, thermo-forming property and dimensional stability as well as lightweight property, and so can ideally be used for an upholstery material for vehicles, a heat-insulation material, a buffer material and the like.
摘要:
The present invention provides an insulating sheet which is excellent in handleability when it is uncured, prevents excessive flowage in laminating press, and provides a cured product excellent in dielectric breakdown characteristics, thermal conductivity, heat resistance, and processability. The insulating sheet used for bonding a heat conductor having a thermal conductivity of 10 W/m·K or higher to an electrically conductive layer, comprising: (A) a polymer having a weight average molecular weight of 10,000 or more; (B) at least one of an epoxy monomer (B1) having an aromatic skeleton and a weight average molecular weight of 600 or less and an oxetane monomer (B2) having an aromatic skeleton and a weight average molecular weight of 600 or less; (C) a curing agent; and (D) 20 to 60% by volume of a first inorganic filler; and (E) 1 to 40% by volume of at least one of an organic filler (E1), and a second inorganic filler (E2) that is different from the first inorganic filler (D) and has a new Mohs' hardness of 3 or less and, when the filler (E) contains the organic filler (E1), 3 to 40% by volume of the organic filler (E1).