Method for modifying nano calcium carbonate and polyolefin master batch containing nano calcium carbonate

A nano-calcium carbonate and polyolefin technology, which is applied in the direction of fibrous fillers and dyed low-molecular organic compounds, can solve the problems of nano-calcium carbonate-filled polyolefin products, different product performance requirements, and poor temperature resistance of stearic acid. , to achieve the effect of improving mechanical properties, improving dispersion properties, and good temperature resistance

A nano-calcium carbonate and polyolefin technology, which is applied in the direction of fibrous fillers and dyed low-molecular organic compounds, can solve the problems of nano-calcium carbonate-filled polyolefin products, different product performance requirements, and poor temperature resistance of stearic acid. , to achieve the effect of improving mechanical properties, improving dispersion properties, and good temperature resistance

CN101260249AActive Publication Date: 2008-09-10SHANXI LANHUA HUAMING NANO MATERIALS
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Get 20L of nano-calcium carbonate slurry (120g / L) whose carbonized average particle diameter is 2nm, adjust the pH to be 8, heat up to about 80 degrees, add 10L distearoyloxyisopropoxyaluminate aqueous solution ( 10g / L), stirred for 4 hours. The calcium carbonate slurry is precipitated and filtered, dried at 80 degrees, and moisture is removed to obtain aluminate-modified nano-calcium carbonate powder.

Embodiment 2

[0035] Get 20L of nano-calcium carbonate slurry (50g / L) whose carbonized average particle diameter is 120nm, adjust the pH to be 10, and heat up to about 80 degrees. 10L of triethanolamine borate solution (5g / L) was added, and the reaction was stirred for 1.5 hours. The calcium carbonate slurry is precipitated and filtered, dried at 80 degrees, and moisture is removed to obtain borate-modified nano-calcium carbonate powder.

Embodiment 3

[0037] Get 10 parts by weight of nano-calcium carbonate powder in Example 1, melt index is 90 parts by weight of polyethylene resin of 0.5, antioxidant 10100.06 parts by weight, polyethylene grafted acrylic acid 0.5 parts by weight (grafting rate 1%) , 1 weight part of polyethylene wax.

[0038] First, put the nano-calcium carbonate, antioxidant and polyethylene wax into the high-mixer and mix them. When the material temperature rises to 120 degrees, mix for another 5 minutes. Then add polyethylene grafted acrylic acid and polyethylene resin, and mix at low speed for 5 minutes. The mixed material is extruded and granulated through a twin-screw extruder to obtain a nano calcium carbonate polyethylene composition.

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PUM

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Abstract

The invention provides a modification method of nano calcium carbonate and polyolefin master batch containing the nano calcium carbonate. The modification method comprises the following steps: coupling agent (a boric acid ester or an ester aluminate) is added in nano calcium carbonate slurry at 70 DEG C to 90 DEG C, and the pH value of the system is controlled within 8 to 10 so as to carry out the surface treatment of nano calcium carbonate; and then the nano calcium carbonate is collected after surface treatment. The modification method, which selects novel coupling agent and adopts wet-way coating modification, solves the problem that nano calcium carbonate agglomeration is easy to occur in polyolefin product, thereby making full use of the performance of nano calcium carbonate; moreover, the modification method improves the mechanical property of calcium carbonate-filled polyolefin product and the adaptability to the manufacturing temperature of polyolefin so as to avoid the problem of material surface yellowing caused by the addition of nano calcium carbonate at a higher manufacturing temperature.

Description

technical field [0001] The invention relates to a surface-modified nano-calcium carbonate, a polymer composition containing the nano-calcium carbonate and a preparation method thereof. Background technique [0002] Polyolefin is a general-purpose synthetic resin product widely used at present, and its output ranks first among all kinds of general-purpose plastics. Polyolefin can be used to make various packaging films, agricultural films, heat shrinkable films, cables, pipes, packaging containers, etc. Among them, film products are used in the largest amount. [0003] Calcium Carbonate (CaCO 3 ) is a widely used inorganic filler that can be applied to polyethylene (PE) and polypropylene (PP) products. Due to its small particle size and high surface activity, compared with traditional calcium carbonate, when it is used in polyolefin products, it has little effect on the overall performance of the material. In some cases, it can even improve the material's Certain aspects o...

Claims

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Application Information

Patent Timeline
10 Sep 2008
Publication
CN101260249A
IPC
C09C1/02; C09C3/08; C08L23/00; C08K9/04
Inventors
杨景辉; 余蓉蓉