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Heavy calcium carbonate, production method therefor, and resin composition containing said calcium carbonate

一种重质碳酸钙、树脂组合物的技术，应用在碳酸钙/锶/钡、钙/锶/钡化合物、染色低分子有机化合物处理等方向，能够解决树脂组合物pH上升、水分变多、难微粉化等问题，达到贮藏稳定性优异、经时粘度变化少、缩短冷却时间的效果

Active Publication Date: 2015-05-13
MARUO CALCIUM COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, dehydration and drying processes are required, which is not conducive to cost
In addition, if the specific surface area becomes larger, the water content will increase, and the use will be limited.
In addition, although there is, for example, a method of absorbing moisture generated by adding quicklime as a dehydrating agent, the pH of the resin composition rises, so its use is limited.
In addition, it is difficult to micronize due to its reactivity, and coarse particles are a problem especially when used in the field of thin films

Method used

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  • Heavy calcium carbonate, production method therefor, and resin composition containing said calcium carbonate
  • Heavy calcium carbonate, production method therefor, and resin composition containing said calcium carbonate
  • Heavy calcium carbonate, production method therefor, and resin composition containing said calcium carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0185] Using commercially available heavy calcium carbonate Super #2000 (manufactured by Maruo Calcium Co., Ltd.), in an external heating type rotary drying furnace (manufactured by Takasago Kogyo Co., Ltd., external dimensions are Φ150×2000mm), at an external heating temperature of 580°C, Heat treatment was carried out under the conditions that the retort rotation speed was 4 rpm, the angle was 60 mm, and the input amount was 6 kg / h. At this time, the temperature of the contents was 420° C., and the residence time was about 10 minutes. The product was left to cool, and surface-treated using a super mixer SMV-20 (manufactured by Kawata). 5.5 kg of this product was put into a mixer, and after the temperature of the content became 70°C while heating, 55 g of stearic acid heated to 70°C and melted was added while stirring, and heat treatment was carried out with stirring to the content. The material temperature reaches 130°C. Then, HI-BOLTA 300 (manufactured by TOYO HITEC Co., ...

Embodiment 2

[0187] Using a fluid classifier Turbo Classifier TC-15 (registered trademark: manufactured by Nisshin Engineering Inc.), the feed rate is 1.5kg / h, the rotor speed is 8000rpm, and the air volume is 1.5m 3 Under the condition of / min, commercially available heavy calcium carbonate Super #2000 (manufactured by Maruo Calcium Co., Ltd.) was classified, and the coarse powder was recovered. This was heat-treated at 400° C. for 1 hour in an electric furnace. This product is through surface treatment, sieving process identically with embodiment 1, obtains the ground calcium carbonate through surface treatment with the powder body property shown in table 1.

Embodiment 3

[0189] Use commercially available heavy calcium carbonate Nanox #25A (manufactured by Maruo Calcium Co., Ltd.), except that, carry out classification, heat treatment, surface treatment similarly to Example 2, obtain through sieving process and have table 1 Surface-treated ground calcium carbonate with the powder properties shown. Wherein, the amount of surface treatment agent is 71.5g.

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Abstract

Provided is a surface-treated heavy calcium carbonate useful for a film precisely controlling pore diameters or a polyester-based resin, etc., that is readily hydrolyzed; or a heavy calcium carbonate that is adequate with no preliminary drying or with simple preliminary drying, when mixing same in a one-liquid type moisture curable adhesive or a sealant or other curable resin. A surface-treated heavy calcium carbonate fulfilling formulas 13,000<=A<=25,000, 0.8<=B<=3.0, C>=0.55, and 0<=D1<=1,000 or a heavy calcium carbonate fulfilling formulas 8,000<=A<=25,000, 0.8<=B<=15, 0<=C1<=1,000, and 0<=C2<=150. In the formulas, A is the specific surface area (cm2 / g), B is the 50% particle diameter (d50) at the average particle diameter (µm), C is the 10% particle diameter (µm) in the particle size distribution, D1 and C1 are water content (ppm) measured using the Karl Fischer Method (heating vaporization method) at 25°-300°C, and C2 is the water content (ppm) measured the same way, at 200°-300°C.

Description

technical field [0001] The present invention relates to heavy calcium carbonate, its preparation method and resin composition containing the surface-treated heavy calcium carbonate. Background technique [0002] At present, many methods for producing porous films have been proposed, in which a film obtained by mixing an inorganic filler such as calcium carbonate with a resin for film production such as a polyolefin resin is stretched in a uniaxial direction or a biaxial direction to obtain a porous film. Connected pores are created in the film. Such porous films have been proposed for use in various applications such as sanitary materials, medical materials, construction materials, agricultural sheets, and battery separators. [0003] Calcium carbonate is an inert filler that hardly causes abrasion of the manufacturing equipment. However, since the surface is hydrophilic, it is easy to absorb moisture and has poor affinity with the resin. Therefore, it is used after surface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/26C01F11/18C08L101/00C09C1/02C09C3/04C09C3/08C09J11/04C09J201/00
CPCC08K3/26C09J11/04C09C1/021C01P2006/12C01P2004/61C01P2004/62C08K2201/006C01F11/185C08K2201/003C01P2004/51C01P2006/82Y10T428/2982C08K9/04C08J5/18B05D3/029C01F11/18
Inventor 前场武司江原昭次北条寿一
Owner MARUO CALCIUM COMPANY