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Calcium carbonate, rubber and polyvinyl chloride composition and preparation method thereof

A polyvinyl chloride and calcium carbonate technology, applied in the field of polymer processing, can solve the problems of difficult removal of additives, poor physical and mechanical properties of filled powder rubber products, and affect the application performance of the composition, so as to achieve less impurities and simple drying process Ease of operation and stable physical and mechanical properties

Inactive Publication Date: 2012-01-18
SHANGHAI HUAMING HI TECH GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the nano-calcium carbonate slurry used must be surface-modified, and a coagulant must also be added to break the emulsion in the later stage.
These additives remain in the composition and are difficult to remove, affecting the application performance of the composition
[0005] In addition, among the currently published filling powder rubber preparation methods, it mainly involves how to obtain powder rubber products with moderate particle size, high powder forming rate and simple preparation process, and less research is done on the bonding mode between filler particles and rubber particles, which makes The obtained filled powder rubber products have poor physical and mechanical properties and limited applications

Method used

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  • Calcium carbonate, rubber and polyvinyl chloride composition and preparation method thereof
  • Calcium carbonate, rubber and polyvinyl chloride composition and preparation method thereof
  • Calcium carbonate, rubber and polyvinyl chloride composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Calcium carbonate raw material preparation:

[0051] According to the method described in the third page to the fourth page step (1) to (3) of the patent document CN 1631789A instruction manual, the solid content is 6wt% calcium carbonate suspension, and the average particle diameter of the calcium carbonate particles tested by the specific surface area method is 30nm .

[0052] Composition preparation:

[0053] Take 900g of calcium carbonate suspension and put it into a 2L reaction kettle, stir at 800r / min and heat up to 50°C, then add 275g of SBR-1502 styrene-butadiene latex with a solid content of 24wt%, stir and mix, keep warm for 10min, filter and dehydrate, The particle distribution of the obtained filter cake is shown in Table 1. The entire filter cake was blended with 60 g of XS-5 polyvinyl chloride dry powder, and dried in an oven at 120° C. for 2 hours to obtain the composition of the present invention.

[0054] Wherein: calcium carbonate 45.0wt% in initial...

Embodiment 2

[0062] Calcium carbonate raw material preparation:

[0063] According to the same method of embodiment 1, the difference is that the average particle diameter of calcium carbonate is 55nm, and the solid content of calcium carbonate suspension is 11.6wt%.

[0064] Composition preparation:

[0065] Take 800g of calcium carbonate suspension and put it into a 2L reactor, stir at 500r / min and heat up to 75°C, then add 620g of NBR-1704 nitrile latex with a solid content of 10wt%, stir and mix, keep warm for 20min, filter and dehydrate, The particle distribution of the obtained filter cake is shown in Table 1. All the filter cake was added to 247.7 g of GB1150 polyvinyl chloride suspension with a solid content of 50 wt % to disperse, and spray dried (the temperature of the tail gas was 89° C.) to obtain the composition of the present invention.

[0066] Wherein: calcium carbonate 59.9wt% in the initial composition, polymer elastomer 40.1wt%;

[0067] 100 parts of weight of calcium...

Embodiment 3

[0071] Calcium carbonate raw material preparation:

[0072] According to the same method of embodiment 1, the difference is that the average particle diameter of calcium carbonate is 87nm, and the solid content of calcium carbonate suspension is 10.4wt%.

[0073] Composition preparation:

[0074] Take 700g of calcium carbonate suspension and put it into a 2L reactor, stir at 400r / min and heat up to 95°C, then add 624g of CRL40-Gx neoprene latex with a solid content of 5wt%, stir and mix, keep warm for 30min, filter and dehydrate, The particle distribution of the obtained filter cake is shown in Table 1. The entire filter cake was blended with 104g of XJ-2 dry polyvinyl chloride powder, and dried in an oven at 80°C for 2 hours to obtain the composition of the present invention.

[0075] Calcium carbonate 70.0wt% in the initial composition, polymer elastomer 30.0wt%;

[0076] 100 parts by weight of calcium carbonate and rubber initial composition in the invention composition,...

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Abstract

The invention provides a calcium carbonate, rubber and polyvinyl chloride composition and a preparation method thereof; the composition comprises the following components by weight: 100 parts of initial composition of calcium carbonate and rubber, and 50-200 parts of polyvinyl chloride. The preparation process of the invention is simple; the cost is greatly reduced; the impurities in the product are less; polyvinyl chloride particles are used as a physical isolating agent, which solves the problem of bonding of the initial composition during drying; the drying process is simple and practical, avoids the pollution and energy consumption of large drying equipment; the cost is effectively controlled; the composition of the invention is applicable to polyvinyl chloride toughening modification, can increase the impact strength of polyvinyl chloride from 3.7 kJ / m2 to 48 kJ / m2 while the tensile strength and flexural modulus are almost maintained constant.

Description

technical field [0001] The invention relates to a composition of calcium carbonate, rubber and polyvinyl chloride and a preparation method thereof, and the composition is used for polymer processing. Background technique [0002] Polyvinyl chloride, as the second largest general-purpose plastic, is widely used in building materials, medical treatment, and packaging fields. However, its poor impact resistance greatly limits its application. At present, the commonly used toughening modifiers for PVC are divided into two categories: elastomers and inorganic rigid particles. Elastomer modifiers have high costs and tend to reduce the original strength and rigidity of polyvinyl chloride. Although inorganic rigid particles can simultaneously enhance and toughen the effect, the modification effect is not obvious and it is difficult to meet the actual application requirements. In view of this, many studies have devoted themselves to compounding and modifying polyvinyl chloride with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L21/00C08K3/26C08L9/06C08L9/00C08L23/22C08L11/00C08L23/16C08L9/02C08L33/00C08C1/15
Inventor 陈雪梅张周达吴秋芳马新胜
Owner SHANGHAI HUAMING HI TECH GRP
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