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Thermoplastic calcium carbonate toughening particles and preparation method therefor

A calcium carbonate and thermoplastic technology, applied in the treatment of dyed polymer organic compounds, fibrous fillers, etc., can solve the problems of modifier shedding failure, product strength impact, and easy particle agglomeration, etc., to achieve the effect of improving dispersibility

Inactive Publication Date: 2015-12-02
杭州明鑫钙业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the weak connection between calcium carbonate particles and modifiers, it brings difficulties to surface organicization and thermal plasticization, especially in plastic processing, due to heating and shearing, under heating conditions higher than 200 ° C, The coupling agent, dispersant, and coating material on the surface of calcium carbonate are extremely volatile and fall off, which leads to the failure of the modifier coated on the surface of calcium carbonate to fall off, and the particles are easy to agglomerate, which not only loses the toughness, but also reduces the strength of the product. severely affected

Method used

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  • Thermoplastic calcium carbonate toughening particles and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Add 5 parts by weight of liquid polymer polyisobutylene with an average molecular weight of 200,000 and 80 parts by weight of nanoporous calcium carbonate with through holes into a closed reaction mixer, set the negative pressure to 2.0 MPa at room temperature, and stir at a high speed of 100 rpm After dispersing for 20 minutes, polyisobutylene is adsorbed in the microporous network of nanoporous calcium carbonate;

[0025] 2) Add 8 parts by weight of butadiene and 15 parts by weight of styrene to the material obtained in step 1), add tetrahydrofurfuryl alcohol and butyl lithium during high-speed stirring at 800-1200 rpm, and heat at 60-80 ° C Polymerization occurs under the environment, the styrene random copolymer is connected with the polyisobutylene adsorbed in the nanoporous calcium carbonate network, and coated on the surface of the calcium carbonate particles to obtain a thermoplastic calcium carbonate toughened particle. Wherein the addition of tetrahydrofurf...

Embodiment 2

[0030] 1) Add 3 parts by weight of liquid polymer polyisobutylene with an average molecular weight of 300,000 and 85 parts by weight of nanoporous calcium carbonate with more than 20% through holes into a closed reaction mixer. Stir and disperse at high speed for 15 minutes, polyisobutene is adsorbed in the microporous network of nanoporous calcium carbonate;

[0031] 2) Add 5 parts by weight of butadiene and 15 parts by weight of styrene to the material obtained in step 1), add tetrahydrofurfuryl alcohol and butyllithium during high-speed stirring at 800-1200 rpm, and heat at 60-80 ° C Polymerization occurs under the environment, the styrene random copolymer is connected with the polyisobutylene adsorbed in the nanoporous calcium carbonate network, and is coated on the surface of the calcium carbonate particles to form a firm coating layer, wherein the addition of tetrahydrofurfuryl alcohol is butanediol 3% of the mass of alkene, and the addition of butyllithium is 5% of the ...

Embodiment 3

[0034] 1) Add 45 parts by weight of liquid polymer polyisobutylene and 90 parts by weight of nanoporous calcium carbonate to a closed reaction mixer, set the negative pressure at room temperature to 3.5MPa, stir and disperse at a high speed of 100rpm for 20 minutes, polyisobutene is adsorbed Within the microporous network of nanoporous calcium carbonate;

[0035] 2) Add 8 parts by weight of butadiene and 10 parts by weight of styrene to the material obtained in step 1), add tetrahydrofurfuryl alcohol and butyl lithium during high-speed stirring at 800-1200 rpm, and heat at 60-80 ° C Polymerization occurs under the environment, the styrene random copolymer is connected with the polyisobutylene adsorbed in the nanoporous calcium carbonate network, and is coated on the surface of the calcium carbonate particles to form a firm coating layer, wherein the addition of tetrahydrofurfuryl alcohol is butanediol 2.5% of the mass of alkene, and the addition of butyllithium is 7% of the ma...

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Abstract

The invention discloses thermoplastic calcium carbonate toughening particles. The particles are characterized in that nano porous calcium carbonate is used as a main raw material; thermoplastic resin is networked in pores of the nano porous calcium carbonate and is tightly connected with outer resin of calcium carbonate particles to form a wrapping layer. In particular, the nano pores are through holes; the thermoplastic resin is uniformly and firmly fixed in the pores of the calcium carbonate particles and on the surfaces of the calcium carbonate particles; and the surface resin does not fall. Therefore, the dispersity and toughness of nano calcium carbonate in plastic are favorably improved, and the agglomeration of nano particles is hindered, so that the toughening effect of the nano calcium carbonate is exerted to the maximum extent.

Description

technical field [0001] The invention relates to the deep processing and modification of calcium carbonate, in particular to calcium carbonate toughening particles specially used for plastics and a preparation method thereof. Background technique [0002] With the rapid development of polymer science and technology, the performance requirements of polymer material products are getting higher and higher. Plastic toughening has become an important development trend of polymer materials. At present, most plastic toughening agents use rubber-like elastomer materials as toughening agents, which are dispersed in the plastic matrix in an appropriate way to achieve the purpose of toughening modification. However, there are some insurmountable defects in elastomer toughening, such as: while the impact strength, elongation at break and work of break of the material increase, the stiffness, strength, service temperature and processing performance of the material are greatly reduced. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/10C08K7/24C08K3/26C09C1/02C09C3/10
Inventor 陈庆曾军堂
Owner 杭州明鑫钙业有限公司
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