摘要:
The present invention provides a curable composition comprising: (A) a vinyl polymer (I) comprising, at the molecular terminus, at least one group represented by the general formula (1): CH2═C(Ra)—C(O)O— (1) wherein Ra represents a hydrogen atom or a monovalent organic group having 1 to 20 carbon atoms, (B) a polymerization initiator, and (C) a metallic soap. The curable composition comprising a vinyl polymer has superior mold release properties without a substantial decrease in mechanical properties such as compression set.
摘要:
A curable composition having a low viscosity and providing a satisfactory rubber cured article is provided. A composition curable by radical photo curing and cationic photo curing in combination, comprising the under-mentioned components (A), (B), (C) and (D) as essential components: (A) a vinyl polymer having two or more acryloyl group or the like per molecule, the acryloyl groups or the like being present at one or more molecular ends; (B) an epoxy compound and/or an oxetane compound; (C) a radical photopolymerization initiator; and (D) a cationic photopolymerization initiator.
摘要:
The present invention provides a composition for on-site forming gaskets, which has excellent heat resistance, weather resistance, oil resistance, curability, compression set, and the like, a gasket, and (meth)acrylic acid and a curable composition thereof. Specifically, the present invention provides a composition for on-site forming gaskets containing a vinyl polymer with a (meth)acryloyl group at a molecular end as an essential component, and a gasket, a cured product of the composition exhibiting predetermined compression set. Also, the present invention provides a (meth)acrylic polymer having a (meth)acryloyl group at a molecular end and a curable composition thereof, a cured product exhibiting high oil resistance.
摘要:
An object of the present invention is to provide a curable composition comprising a vinyl polymer, the curable composition capable of providing a cured product having good mechanical properties. The present invention is a curable composition comprising (A) a vinyl polymer (I) comprising, at the molecular terminal, at least one group represented by the general formula (1): CH2═C(Ra)—C(O)O— (1), wherein Ra represents a hydrogen atom or a monovalent organic group having 1 to 20 carbon atoms, and (B) a monoacrylate phenolic antioxidant.
摘要翻译:本发明的目的是提供一种包含乙烯基聚合物的可固化组合物,该固化组合物能够提供具有良好机械性能的固化产物。 本发明是一种可固化组合物,其包含(A)乙烯基聚合物(I),其在分子末端包含至少一个由通式(1)表示的基团:CH 2 CO 2(R C(O)O-(1)其中R a表示氢原子或碳原子数1〜20的一价有机基团,(B) 单丙烯酸酯酚类抗氧化剂。
摘要:
An active energy curing type composition for an in-place shaping gasket is provided which is capable of providing an in-place shaped gasket superior in heat resistance, weather resistance, oil resistance, curability, compression set, and the like. An active energy curing type composition for an in-place shaping gasket, comprising the under-mentioned components (A) and (B) as essential components, wherein the viscosity of the composition is 400 Pa·s or less at 23° C. and the compression set of a cured article which is prescribed in JIS K 6262 is 30% or less: (A) a vinyl polymer having two or more (meth)acryloyl groups per molecule at the molecular ends, and (B) a vinyl polymer having one (meth)acryloyl group per molecule at the molecular end.
摘要翻译:提供了一种用于就地成形垫圈的活性能量固化型组合物,其能够提供耐热性,耐候性,耐油性,固化性,压缩永久变形等优异的就地形状的垫圈。 一种用于就地成型垫圈的活性能量固化型组合物,其包含作为必要成分的上述成分(A)和(B),其中组合物的粘度在23℃下为400Pa·s以下, JIS K 6262中规定的固化物的压缩永久变形量为30%以下:(A)分子末端分子中具有2个以上(甲基)丙烯酰基的乙烯基聚合物,(B)具有 在分子末端每分子有一个(甲基)丙烯酰基。
摘要:
An active energy curing type composition for an in-place shaping gasket is provided which is capable of providing an in-place shaped gasket superior in heat resistance, weather resistance, oil resistance, curability, compression set, and the like. An active energy curing type composition for an in-place shaping gasket, comprising the under-mentioned components (A) and (B) as essential components, wherein the viscosity of the composition is 400 Pa·s or less at 23° C. and the compression set of a cured article which is prescribed in JIS K 6262 is 30% or less: (A) a vinyl polymer having two or more (meth)acryloyl groups per molecule at the molecular ends, and (B) a vinyl polymer having one (meth)acryloyl group per molecule at the molecular end.
摘要翻译:提供了一种用于就地成形垫圈的活性能量固化型组合物,其能够提供耐热性,耐候性,耐油性,固化性,压缩永久变形等优异的就地形状的垫圈。 一种用于就地成型垫圈的活性能量固化型组合物,其包含下述组分(A)和(B)作为必要组分,其中组合物的粘度在23℃为400Pa·s或更低, JIS K 6262中规定的固化物的压缩永久变形量为30%以下:(A)分子末端分子中具有2个以上(甲基)丙烯酰基的乙烯基聚合物,(B)具有 在分子末端每分子有一个(甲基)丙烯酰基。
摘要:
A curable composition having a low viscosity and providing a satisfactory rubber cured article is provided. A composition curable by radical photo curing and cationic photo curing in combination, comprising the under-mentioned components (A), (B), (C) and (D) as essential components: (A) a vinyl polymer having two or more acryloyl group or the like per molecule, the acryloyl groups or the like being present at one or more molecular ends; (B) an epoxy compound and/or an oxetane compound; (C) a radical photopolymerization initiator; and (D) a cationic photopolymerization initiator.
摘要:
A method of producing an optical fiber preform by heating a glass preform that has a glass rod and a silica glass porous body and includes a valid portion and invalid portions, comprising: heating the glass preform while moving the glass preform along its axial direction relative to a heater; stopping the relative movement or decreasing a speed of the relative movement when an invalid portion positioned at a tail end reaches a vicinity of the heater; heating the invalid portion for a predetermined time while maintaining a temperature at which the silica glass porous body can be vitrified; decreasing the heating temperature to a temperature determined by adding 200° C. to an annealing point of a silica glass; and removing the glass preform to the outside of the heating furnace without increasing the heating temperature to the temperature at which the silica glass porous body is vitrified.
摘要:
A file is transferred directly between a parent magnetic-disk device and a child magnetic-disk device. In one embodiment, a parent magnetic-disk device has a host-mode execution program, whereas a child magnetic-disk device is capable operating in a device mode as is the case with an ordinary magnetic-disk device. The parent magnetic-disk device has an operating-mode-setting unit including a special-purpose jumper block. An MPU employed in the parent magnetic-disk device executes the host-mode execution program to put the parent magnetic-disk device in a host mode. At an activation time, the MPU refers to the logic of the special jumper block to start an operation in the host mode. The MPU controls the parent magnetic-disk device to directly transfer a file to the child magnetic-disk device. Thus, the file can be transferred between the parent and child magnetic-disk devices without intervention by a host computer.
摘要:
An optical fiber twisting apparatus that prevents line distortion in an optical fiber undergoing a drawing process and provides a consistent coating on a bare optical fiber. This optical fiber twisting apparatus includes a twist roller apparatus that having a twist roller that, by imparting a twist to an optical fiber, imparts a twist to a molten portion of an optical fiber preform positioned on an upstream side of the optical fiber, and a support portion that supports the twist roller. The accuracy of the outer circumference of the twist roller when the twist roller is forming a part of the twist roller apparatus is 15 μm or less.