Inorganic filler coated with polyrhodamine, preparation method and application thereof

An inorganic nano-filler and Ning coating technology, which is applied in the field of reinforced rubber, can solve the problems of large influence on vulcanization characteristics, slow vulcanization rate, and low promotion efficiency, so as to improve dispersion, reduce dependence, and enhance interfacial adhesion. Effect

Active Publication Date: 2019-01-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has some important defects: (1) The effect of interface modification is strongly dependent on processing conditions (including temperature, compound volume, humidity, etc.); (2) Large dosage, low efficiency, and great influence on vulcanization characteristics
Because some structural units of rhodanine are similar to benzothiazole accelerators, there were some research reports on rhodanine used as rubber accelerators in the 1950s and 1960s, but due to the disadvantages of low acceleration efficiency and slow vulcanization rate, etc. , rhodanine is gradually replaced by high-efficiency accelerators such as thiazoles and guanidines

Method used

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  • Inorganic filler coated with polyrhodamine, preparation method and application thereof
  • Inorganic filler coated with polyrhodamine, preparation method and application thereof
  • Inorganic filler coated with polyrhodamine, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) Coating modified white carbon black with polyrhodanine as the inorganic filler reinforced by styrene-butadiene rubber, the specific preparation process is as follows: the white carbon black is dispersed in water to obtain a concentration of 5wt% water dispersion; the rhodanine ( The mass ratio of white carbon black to rhodanine is 10 / 1) added to the above water dispersion, stirred at 80°C for 5 minutes; adding ammonium persulfate oxidant to the above water dispersion, reacted at 80°C for 1 hour, and filtered Polyrhodenin-coated silica is available. The specific coating amount of polyrhodanine in the modified filler is 3%. From the infrared results, it can be explained that in the modified filler, the 1680cm -1 and 1480cm -1 Two new absorption peaks appeared, representing the vibrational absorption peaks of C=C and C-N respectively, which also corresponded to the characteristic absorption peaks of polyrhodenine, which proved the successful coating of polyrhodanine ...

Embodiment 2

[0038] (1) To study the effect of polyrhodenine coating process on silica reinforced rubber composites. The specific implementation process is as follows: disperse white carbon black in water to obtain a water dispersion with a concentration of 5wt%; add rhodanine (the mass ratio of white carbon black and rhodanine is 10 / 1) to the above-mentioned water dispersion, Stir at high temperature for 5min (the specific implementation temperature is as shown in Table 1); add the oxidizing agent to the above-mentioned water dispersion (the specific oxidizing agent used is as shown in Table 1), stir at the reaction temperature for 1h, and after filtration, you can obtain the polymerization under different polymerization process conditions. Silica coated with rhodanine. From the infrared results, it can be explained that in the modified filler, the 1680cm -1 and 1480cm -1 Two new absorption peaks appeared, representing the vibrational absorption peaks of C=C and C-N respectively, which ...

Embodiment 3

[0044](1) using halloysite as the inorganic filler reinforced by styrene-butadiene rubber, the specific preparation process is as follows: halloysite is dispersed in water to obtain a concentration of 10wt% aqueous dispersion; Mass ratio = 15 / 1) added to the above water dispersion, stirred at 80°C for 5 minutes; added ammonium persulfate oxidant to the above water dispersion, reacted at 80°C for 1 hour, and filtered to obtain polyrhodanine coating Modified Halloysite. From the infrared results, it can be explained that in the modified filler, the 1680cm -1 and 1480cm -1 Two new absorption peaks appeared, representing the vibrational absorption peaks of C=C and C-N respectively, which also corresponded to the characteristic absorption peaks of polyrhodenine, which proved the successful coating of polyrhodanine on the surface of silica. The specific coating amount of polyrhodanine is obtained by thermogravimetric analysis. After the temperature is raised to 700°C during the te...

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Abstract

The invention discloses poly-rhodanine coated inorganic packing as well as a preparation method and application thereof. The preparation method comprises the following steps: dispersing inorganic nano packing in water in a suspension manner so as to obtain 0.1-25wt% aqueous dispersion; adding a rhodanine monomer into the aqueous dispersion, and stirring for 5-60 minutes at 60-95 DEG C; adding an oxidant into the aqueous dispersion to react for 0.5-6 hours at 60-95 DEG C; filtering, thereby obtaining the poly-rhodanine coated inorganic packing. An inorganic packing modification method is implemented in water phase, is free of organic solvent, and has the advantages of being simple in process, environment-friendly in procedure, high in efficiency, good in universality for various types of polar packing, and the like. In poly-rhodanine modified inorganic packing reinforced rubber, dispersion of the packing can be remarkably improved, and the interface function can be also improved.

Description

technical field [0001] The invention relates to a reinforced rubber, in particular to an inorganic filler modification and rubber reinforcement, in particular to a polyrhodanine-coated inorganic filler and a method for reinforcing the rubber. Background technique [0002] Except for rubbers with strain crystallization ability such as natural rubber, most rubbers have no practical strength before reinforcement modification. Inorganic filler filling is the most common rubber reinforcement method. The dispersion and interfacial modification of fillers are the key factors to determine the strength of filled rubber. Unmodified inorganic fillers have poor dispersion and interfacial bonding in rubber (especially non-polar rubber) due to their high surface energy, making it difficult to obtain satisfactory reinforcing effects. The use of surface treatment agents, such as silane coupling agents (such as Si69), which are widely used in industry, can effectively improve the interfaci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/10C08K3/36C08K13/06C08K3/34C08L9/06C09C1/28C09C1/40C09C3/10
CPCC08K3/34C08K3/36C08K9/10C08K13/06C08K2201/011C09C1/28C09C1/40C09C3/006C09C3/10C08L9/06
Inventor 郭宝春邝文意杨志军唐征海黄晶
Owner SOUTH CHINA UNIV OF TECH
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