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Calcium hydroxide, resin composition containing same, and formed article

A resin composition, calcium hydroxide technology, applied in the direction of calcium/strontium/barium oxide/hydroxide, fibrous filler, etc., can solve the problems of poor initial coloring, easy crystal growth, poor thermal stability, etc., to achieve acceptance Excellent ability, good acid neutralization performance, high activity effect

Inactive Publication Date: 2009-01-07
KYOWA CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the high solubility of quicklime in water, it is easy to grow crystals and has a small specific surface area (see Patent Document 3), so that the ability of calcium hydroxide to capture halogen is limited.
In addition, compared with the compounding of lead compounds and organotin compounds in synthetic resins, when calcium hydroxide-based stabilizers are compounded in synthetic resins, there are disadvantages of poor thermal stability and very poor initial coloring properties.

Method used

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  • Calcium hydroxide, resin composition containing same, and formed article
  • Calcium hydroxide, resin composition containing same, and formed article
  • Calcium hydroxide, resin composition containing same, and formed article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0114] In a 3L capacity beaker, put 1.5L of tap water and 0.3% by weight (0.9g), 0.5% by weight (1.5g) and 1.0% by weight (3.0g) of calcium hydroxide produced by Shionogi Pharmaceutical Co., Ltd. Hydrous silica (Couplex#80, SiO 2 content 95% by weight) as a silicon-based compound, after the water temperature was raised to about 60° C., 225 g of quicklime (Calcido, manufactured by Ube Materials Co., Ltd.) was added under stirring to carry out a digestion reaction. Then, it was stirred at 90° C. for 30 min (due to self-generated heat, the reaction temperature rose above 90° C.). After cooling, sieve with a 200-mesh sieve, filter, dehydrate, dry, and pulverize. The X-ray diffraction pattern of the resulting powder was that of calcium hydroxide only. Therefore, it can be seen that calcium hydroxide in which silica is solid-dissolved is produced. Table 1 shows the BET specific surface area, average secondary particle size, A of this solid solution calcium hydroxide n- and x.

Embodiment 4

[0116] In addition to using 2.5% by weight (7.5 g) of aluminum hydroxide xerogel (S-100, Al content 28.6% by weight) manufactured by Kyowa Chemical Industry Co., Ltd. as the aluminum-based compound instead of the silicon-based compound in Examples 1-3 Outside, the same process as in Example 1-3. The X-ray diffraction pattern of the resulting powder was that of calcium hydroxide only. Therefore, it can be seen that calcium hydroxide in which alumina is solid-dissolved is produced. Table 1 shows the BET specific surface area, average secondary particle size, A of this solid solution calcium hydroxide n- and x.

Embodiment 5

[0118] Example 1- Except for the silicon-based compound in 3, it was treated in the same manner as in Example 1-3. The X-ray diffraction pattern of the obtained powder was only calcium hydroxide. Therefore, it can be seen that calcium hydroxide in which phosphoric acid is solid-dissolved is produced. Table 1 shows the BET specific surface area, average secondary particle size, A of this solid solution calcium hydroxide n- and x.

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Abstract

Disclosed is a calcium hydroxide having a large specific surface area. Also disclosed are a resin composition having excellent heat stability which contains such a calcium hydroxide, a formed article, and a stabilizer for synthetic resins. The calcium hydroxide is represented by the following formula (1): Ca(OH)2-nx(A)x (wherein n is an integer from 1 to 4, x is a number from 0.001 to 0.2, and A represents an anion derived from at least one compound selected from the group consisting of silicon compounds, phosphorus compounds, aluminum compounds, inorganic acids and organic acids). Also disclosed are a synthetic resin containing such a calcium hydroxide, a formed article and a stabilizer for resins.

Description

technical field [0001] The present invention relates to calcium hydroxide formed by solid-solving a specific compound, a synthetic resin composition containing it, and a shaped article. The present invention also relates to a stabilizer for synthetic resins containing the calcium hydroxide. Background technique [0002] Since synthetic resins, especially halogen-containing resins, are unstable to heat and light and deteriorate over time, or deteriorate during crosslinking reactions and molding processes, lead compounds, organotin compounds and Cd / Ba-based, Ba / Zn-based, Ca / Zn-based and other compound organic acid salts are used as stabilizers. However, with attention to the toxicity of these stabilizers and the pollution of the global environment caused by these stabilizers, various stabilizers have been developed for synthetic resins, with safer and cheaper calcium hydroxide as the main component. agents (see Patent Documents 1 and 2). [0003] However, due to the high s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/02C04B2/06C08L101/00C08K3/22C09C1/02
Inventor 铃木隆文松岛正敏宫宇地诚二真锅等泽义治
Owner KYOWA CHEM IND