摘要:
A lead battery comprising as an active material a formation product of a novel lead monoxide or a heat treatment product thereof is disclosed. This novel lead monoxide has a true density of 8.3 to 9.2 g/cc, an average particle size not larger than 0.2.mu., an infrared absorption peak at a wave number of 1400 to 1410 cm.sup.-1 and a chromic anhydride reactivity of at least 94%.This lead battery is excellent over lead batterys comprising active materials formed from known starting substances with respect to the active material utilization ratio and it has a very long life and stable capacities. In this lead battery, the active material utilization ratio can be maintained at a very high level over a long period.
摘要:
A water-resistant shaped structure of gypsum comprising (A) calcium sulfate dihydrate formed by hardening of calcium sulfate capable of hydration reaction, (B) a calcium type filler for filling up spaces among crystalline particles of said calcium sulfate dihydrate and (C) a water-insoluble or hardly water-soluble salt of a polybasic acid having a second stage dissociation constant of 10.sup.-3 to 10.sup.-10, especially 10.sup.-4 to 10.sup.-9, as measured at 25.degree. C., said calcium type filler (B) being at least one calcium compound selected from the group consisting of calcium hydroxide, calcium carbonate, calcium silicate, calcium aluminosilicate, and non-water-hardenable anhydrous gypsum and partially hydrated products thereof, wherein the amount of the calcium type filler (B) and the water-insoluble or hardly water-soluble calcium salt (C) is 15 to 75% based on the total amount of the components (A), (B) and (C) as calculated as calcium, the amount of the water-insoluble or hardly water-soluble calcium salt (C) is 0.1 to 30% based on the total amount of the components (A), (B) and (C) as calculated as calcium, the water-insoluble or hardly water-soluble calcium salt (C) is distributed predominantly in the surface portion of the shaped structure, and said surface portion has a pore volume smaller than 0.50 ml/g in pores having a radius in the range of 75 to 75000 A and a pore volume smaller than 0.20 ml/g in pores having a radius in the range of 4000 to 10000 A.
摘要:
A stabilizer composition for chlorine-containing polymers having a much reduced tendency to blow at the molding step, which comprises (A) an inorganic stabilizer having a power volume of at least 0.5 cc/g, said stabilizer (A) consisting essentially of at least one member selected from the group consisting of silicates of metals of Groups II and IV of the Periodic Table and composites of silicate acid with oxides, hydroxides and carbonates of said metals, and (B) an organic additive having a boiling point or decomposition point higher than a chlorine-containing polymer-processing temperature, said organic additive (B) being incorporated into the stabilizer (A) at a weight ratio (A) : (B) of 1 : at least 0.1 so that the pore volume ratio defined by the following formula: ##EQU1## WHEREIN PVc denotes the pore volume (cc/g) of the entire composition and PVa denotes the pore volume (cc/g) of said inorganic stabilizer (A),is not higher than 0.8.
摘要:
When titanium phosphate is used as a white pigment to an article of which surface comprises polyolefin composition, the article is remarkably whitened.