摘要:
[Problems] There is provided a curable composition having good adhesion by using a non-organotin catalyst.[Means to Solve Problems] The curable composition comprises (A) an organic polymer having a silicon-containing group being capable of crosslinking by forming siloxane bonds and (B) one or more kinds selected from a titanium catalyst, an aluminum catalyst and a zirconium catalyst, and is characterized in that a stress at 50% tension is within a range from 0.01 MPa to 0.20 MPa, when determined by adding and mixing 1.5 parts of tin octylate, 0.25 part by weight of laurylamine and 0.6 part by weight of pure water to 100 parts by weight of the component (A), subjecting the mixture to centrifugal defoaming, pouring the mixture carefully into a polyethylene frame not to mix air bubbles thereto, aging the mixture at 23° C. for one hour, and further at 70° C. for 20 hours, punching the obtained 3 mm thick cured sheet according to JIS K6251 to obtain No. 3 dumbbell, and carrying out a tension test (tensile speed: 200 mm/min) at 23° C. at 50% RH.
摘要:
The present invention has its object to provide a curable composition having good curability and capable of keeping a curability and mechanical strength even after storage by using a substantially metal-free curing catalyst. The present invention provides a curable composition which comprises (A) an organic polymer having a silicon-containing group capable of crosslinking by forming a siloxane bond, (B) a carboxylic acid of which the carbon atom adjacent to a carbonyl group is a quaternary carbon, and (C) a polymer plasticizer.
摘要:
[Problem] There is provided a curable composition having satisfactory curability and adhesion by use of a non-tin curing catalyst, and minimizing lowering of mechanical properties of a cured article obtained after storing. [Means to Solve] A one-component type curable composition comprising (A) a polyoxyalkylene polymer (a1) having a silicon-containing group being capable of crosslinking by forming siloxane bonds and/or a (meth)acrylate polymer (a2) having a silicon-containing group being capable of crosslinking by forming siloxane bonds, (B) a chelate type methyl titanate (b1) and/or a chelate type ethyl titanate (b2), and (C) a compound having, in its molecule, a hydrolyzable silicon group and a nitrogen-substituted group.
摘要:
The present invention provides a curable composition including: an organic polymer (A) which has on average 1.1 to 50 groups per one molecule thereof each represented by the general formula (1) and has one or more silicon-containing functional groups capable of cross-linking by forming siloxane bonds: —NR1—C(═O)— (1) wherein R1 is a hydrogen atom, or a substituted or unsubstituted monovalent organic group; and a metal carboxylate and/or a carboxylic acid (B), the curable composition giving a cured article excellent in curability and also excellent in heat resistance although a non-organotin catalyst is used.
摘要:
A furnace wall comprises: a furnace wall bottom part composed of furnace wall tubes having upward-spiraled fluid passages; a nose part which has nose wall tubes disposed in a middle part of a furnace rear wall adjoining the furnace wall bottom part; and a screen part having screen tubes, wherein the terminal parts of the furnace wall tubes are located lower than the nose part. Consequently, the drain generated in the nose wall tubes while the operation of the boiler is suspended can naturally fall inside the furnace wall tubes located lower than the nose part, and in a case where the header is connected with the terminal parts of the furnace wall tubes, the drain generated in the nose wall tubes can naturally fall inside the header. In addition, the furnace wall tubes which extend upright from the terminal parts of the furnace wall tubes can be provided to connect parts of the furnace wall tubes directly with the header, to connect the header with the nose wall tubes via vertical tubes and; and to connect other parts of the furnace wall tubes directly with the screen tubes, thereby integrating the vertical furnace wall tubes, the vertical tubes, and the screen tubes by being welded via membrane bars. This results in the furnace wall structure not requiring reinforcing supports for supporting the weight of the furnace wall bottom part.
摘要:
Disclosed are a curable composition characterized by using a curable composition including an organic polymer (A1) having one or more silicon-containing functional groups capable of cross-linking by forming siloxane bonds in which the one or more silicon-containing functional groups capable of cross-linking by forming siloxane bonds are silicon-containing functional groups each having three or more hydrolyzable groups on one or more silicon atoms thereof; and a method for controlling the recovery properties, durability and creep resistance of the cured article. Herewith, the present invention provides a curable composition capable of giving a cured article excellent in recovery properties, durability and creep resistance, and a method for controlling the recovery properties, durability and creep resistance of the cured article.
摘要:
The present invention provides a curable composition which has a high recovery ratio, a high creep resistance, a practical curability and a storage stability. The present invention relates to a curable composition comprising a reactive silicon group-containing organic polymer (A) and a carboxylic acid (B), (I) wherein the composition comprises, as the carboxylic acid (B), a carboxylic acid (C) in which the carbon atom adjacent to the carbonyl group is a quaternary carbon atom; and/or (II) wherein the composition comprises a metal carboxylate (D) formed between a carboxylic acid in which the carbon atom adjacent to the carbonyl group is a quaternary carbon atom and a metal atom of 208 or less in atomic weight.
摘要:
The invention consists in a capacitative electromagnetic flow meter in which excitation is performed at a frequency above the commercially available frequency and having a characteristic correction filter that corrects the gain frequency characteristic of the exciting current such that the exciting flux waveform has a flat section. In the detection unit, the value of the electrostatic capacitance between the face electrodes 4A, 4B and guard electrodes 5A, 5B is made smaller than the value of the electrostatic capacitance between the detecting face electrodes 4A, 4B and the fluid to be measured. The exciting coils are fixed to a cylindrical yoke, being electrostatically screened by coil fixing plates. Fixing by an earth ring is performed with this cylindrical yoke and the two ends of the measurement tube being symmetrical with respect to the tube axis and electrode axes. In addition, fixing is effected by filling the entire interior of the detection unit with epoxy resin.
摘要:
The present invention provides a curable composition useful as a contact adhesive which has a high rate of initial tack development, high tack strength, and long retention time of the developed tack. The curable composition includes an organic polymer (Q) containing a reactive silyl group, and a linear organic polymer (P) having a number average molecular weight larger than that of the polymer (Q) and having a reactive silyl group containing three hydrolyzable groups at only one terminal. The organic polymer (P) and the organic polymer (Q) are mixed at a mixing ratio (P):(Q), in terms of parts by weight, of 60:40 to 5:95.
摘要:
Disclosed are a curable composition characterized by using a curable composition including an organic polymer (A1) having one or more silicon-containing functional groups capable of cross-linking by forming siloxane bonds in which the one or more silicon-containing functional groups capable of cross-linking by forming siloxane bonds are silicon-containing functional groups each having three or more hydrolyzable groups on one or more silicon atoms thereof; and a method for controlling the recovery properties, durability and creep resistance of the cured article. Herewith, the present invention provides a curable composition capable of giving a cured article excellent in recovery properties, durability and creep resistance, and a method for controlling the recovery properties, durability and creep resistance of the cured article.