Cross-linking-type organic polymer-calcium carbonate composite particles and preparation method thereof

A technology of composite particles and polymers, applied in the treatment of dyed low-molecular-weight organic compounds, dyed high-molecular organic compounds, fibrous fillers, etc. Simple method and good mechanical properties

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solution is generally to use a coupling agent with a double bond or an initiating group to pretreat CaCO 3 Or polymer cross-linking, Chinese patent CN1583860 is to carry out emulsion polymerization of polymer olefin monomer and simultaneously cross-linking, grafting on the CaCO 3 The surface and the interface are strong, but the polymerization process is complicated, the efficiency is low, and the cost is high

Method used

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  • Cross-linking-type organic polymer-calcium carbonate composite particles and preparation method thereof
  • Cross-linking-type organic polymer-calcium carbonate composite particles and preparation method thereof
  • Cross-linking-type organic polymer-calcium carbonate composite particles and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Add 2 parts (weight, the same below) of PEG with a number average molecular weight of 1500, 0.8 part of trimethylol melamine, and 0.1 part of aluminum trichloride to 50 parts (weight, the same below) of distilled water, fully Stir to combine well. Add 100 parts of 1250 mesh heavy CaCO to a 500ml Erlenmeyer flask 3 and the mixed liquid, stir evenly at high speed and then vacuum dry to remove moisture. The mixture was placed in a high-speed mixer, stirred (rotating speed 2000 rpm) and heated to 80°C, reacted for 8 minutes, and then heated to 140°C, reacted for 10 minutes. The reactant was cooled to room temperature, and white CaCO was obtained after pulverization 3 Powdered product. After determination, the activation degree of the product is 98.8%, and the cross-linking degree of PEG is 83%.

Embodiment 2

[0032] Add 3.5 parts (by weight, the same below) of PEG with a number-average molecular weight of 400, 1.5 parts of toluene 2,4-isocyanate, and 0.25 parts of dibutyltin dilaurate into 50 parts of distilled water, stir well and mix well. In a 500ml Erlenmeyer flask, add 100 parts of 2500 mesh heavy CaCO 3 and the mixed liquid, stir well and then dry to remove moisture. The mixture was placed in a high-speed mixer, stirred (1800 rpm) and heated to 80°C for 8 minutes, then heated to 100°C for 12 minutes. The reactant was cooled to room temperature, and white CaCO was obtained after pulverization 3 Powdered product. After determination, the activation degree of the product is 99.4%, and the cross-linking degree of PEG is 81%.

Embodiment 3

[0034]Add 0.5 part (by weight, the same below) of PEG with a number average molecular weight of 2000, 0.5 part of toluene 2,4-isocyanate, and 0.02 part of sodium bisulfite into 50 parts of distilled water, stir well and mix well. Add 100 parts of 400 mesh light CaCO to a 500ml Erlenmeyer flask 3 and the mixed liquid, stir at high speed and then dry to remove moisture. The mixture was placed in a high-speed mixer, stirred (2500 rpm) and heated to 80°C for 8 minutes, then heated to 100°C for 12 minutes. The reactant was cooled to room temperature, and white CaCO was obtained after pulverization 3 Powdered product. After determination, the activation degree of the product is 98.4%, and the cross-linking degree of PEG is 79%.

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Abstract

The invention discloses cross-linking-type organic polymer-calcium carbonate composite particles and a preparation method thereof. An organic polymer layer coats the surface of a calcium carbonate particle so that the cross-linking-type organic polymer-calcium carbonate composite particle is obtained. The organic polymer is a cross-linking-type organic polymer prepared from polyethylene glycol having the number-average molecular weight of 400-2000 under the action of a cross-linking agent and a cross-linking catalyst. The preparation method comprises the following steps of mixing PEG, the cross-linking agent and the cross-linking catalyst in distilled water as a dispersion medium to obtain a uniform mixture, carrying out high-speed stirring, carrying out drying so that the mixture can be directionally adsorbed by the surface of CaCO3, carrying out high-speed stirring at a certain temperature so that a uniform coating layer is formed on the surface of CaCO3, and after the reaction is finished, carrying out cooling and crushing. The preparation method has simple processes and a low cost. The cross-linking-type organic polymer-calcium carbonate composite particles have large interface bonding strength of the coating layer and the polymer, and the coating layer is similar to elastomer materials, can be used for plastic resin, can improve the compatibility of CaCO3 particles and resin, can realize improvement of toughness and strength of the composite material having high filling content, and has good mechanical properties.

Description

technical field [0001] The invention relates to a cross-linked organic polymer-calcium carbonate composite particle and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] CaCO 3 It is an inexpensive and easy-to-obtain inorganic raw material, which can be used as a filler for rubber, plastic and other products. It not only plays a filling role, reduces costs, but also modifies materials. But CaCO 3 It has outstanding surface effects, that is, the particles are easy to agglomerate and have poor thermal stability, and it is easy to aggregate and agglomerate during its preparation and application, so that the prepared ultrafine CaCO 3 CaCO repolymerized into large particles 3 ;CaCO 3 It is a kind of hydrophilic inorganic compound, which has poor compatibility with organic polymers. If it is added directly, it will cause uneven dispersion, excessive filling and even make the product unusable, so it needs to be surface modi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/10C08K3/26C08J3/24C09C1/02C09C3/10C09C3/08C08L23/08C08L23/12C08L27/06
Inventor 王日辉裴小静王群涛高凌雁郭锐许萍
Owner CHINA PETROLEUM & CHEM CORP
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