Modified calcium carbonate and application thereof to preparation of silicon rubber

A technology of calcium carbonate and silicone rubber, which is applied in dyeing organosilicon compound treatment, fibrous filler, dyeing physical treatment, etc., can solve the problem that the comprehensive performance cannot meet the application purpose, achieve strong impact resistance, improve compatibility, The effect of improving the interface adhesion

Inactive Publication Date: 2018-11-06
贺州钟山县双文碳酸钙新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As we all know, if the vast majority of rubber is not reinforced,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A silicone rubber, comprising the following raw materials in parts by weight: 100 parts of α, ω-dihydroxy polydimethylsiloxane, 30 parts of methyl vinyl silicone rubber, 15 parts of ethylene acrylic acid copolymer, 70 parts of modified calcium carbonate 4 parts, 4 parts of aramid fiber, 15 parts of white carbon black, 4 parts of silicon nitride fiber, 3 parts of chitosan, 5 parts of crosslinking agent, 2.5 parts of stabilizer, 3 parts of silane coupling agent, 2 parts of catalyst, processing 4 parts of additives and 1.2 parts of 1010 antioxidant.

[0035] Described calcium carbonate obtains through following steps modification:

[0036] (1) Add limestone to the crusher for crushing, and crush until the particle size is ≤0.40mm to obtain coarse calcium carbonate powder;

[0037] (2) Add calcium carbonate coarse powder to the grinder, and then add a surface treatment agent composed of pentaerythritol palmitate and polysiloxane sodium succinic acid amide sulfonate at a we...

Embodiment 2

[0046] A silicone rubber, comprising the following raw materials in parts by weight: 100 parts of α, ω-dihydroxy polydimethylsiloxane, 20 parts of methyl vinyl silicone rubber, 12 parts of ethylene acrylic acid copolymer, 60 parts of modified calcium carbonate 3 parts, 3 parts of aramid fiber, 12 parts of white carbon black, 3 parts of silicon nitride fiber, 4 parts of chitosan, 5 parts of crosslinking agent, 1.5 parts of stabilizer, 2 parts of rare earth coupling agent, 2.5 parts of catalyst, processing 5 parts of additives and 1 part of 1010 antioxidant.

[0047] Described calcium carbonate obtains through following steps modification:

[0048] (1) Add limestone to the crusher for crushing, and crush until the particle size is ≤0.40mm to obtain coarse calcium carbonate powder;

[0049] (2) Add coarse calcium carbonate powder into the grinder, and then add a surface treatment agent composed of pentaerythritol palmitate and polysiloxane sodium succinic acid amide sulfonate at...

Embodiment 3

[0058] A silicone rubber, comprising the following raw materials in parts by weight: 100 parts of α, ω-dihydroxy polydimethylsiloxane, 40 parts of methyl vinyl silicone rubber, 12 parts of ethylene acrylic acid copolymer, 70 parts of modified calcium carbonate 5 parts, 5 parts of aramid fiber, 18 parts of white carbon black, 5 parts of silicon nitride fiber, 2 parts of chitosan, 6 parts of crosslinking agent, 2.5 parts of stabilizer, 3.5 parts of aluminum-zirconium methacrylate coupling agent, 1 part of catalyst, 4 parts of processing aid and 1.5 parts of 1076 antioxidant.

[0059] Described calcium carbonate obtains through following steps modification:

[0060] (1) Add limestone to the crusher for crushing, and crush until the particle size is ≤0.40mm to obtain coarse calcium carbonate powder;

[0061] (2) Add calcium carbonate coarse powder to the grinder, and then add a surface treatment agent composed of pentaerythritol palmitate and polysiloxane sodium succinic acid ami...

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Abstract

The invention discloses modified calcium carbonate and the application thereof to preparation of silicon rubber. The modified calcium carbonate is subjected to twice surface modification by a surfacetreating agent consisting of pentaerythritol palmitate and sodium polysiloxane succinate amide sulfonate as well as polyurethane methyl sesquisiloxane and vegetable oil fatty acid alkanolamide borate.The modified calcium carbonate has the advantages of high dispersibility, high toughness, weather resistance, high-temperature and low-temperature resistance and the like, can be filled with a largeamount of silicon rubber, and gives high strength, high toughness, high-temperature and low-temperature resistance, high impact resistance, high flame resistance, corrosion resistance, tensile strength and high breaking elongation to the silicon rubber after filling.

Description

technical field [0001] The invention relates to the technical field of calcium carbonate materials, in particular to a modified calcium carbonate and its application in preparing silicone rubber. Background technique [0002] Calcium carbonate is an important inorganic filler, which is widely used in rubber, plastics, paper, coatings, inks, medicine and other fields. However, due to the smaller the particle size of calcium carbonate particles and the more atoms on the surface, the higher the surface energy, the stronger the adsorption, and the mutual agglomeration between the particles; followed by calcium carbonate as an inorganic filler, the surface of the particles is hydrophilic and hydrophobic. Oil has poor affinity with rubber and is easy to form aggregates, resulting in internal defects of polymers and poor mechanical properties. In order to improve the filling performance of calcium carbonate, it is necessary to use effective technology and surface modification meth...

Claims

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Application Information

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IPC IPC(8): C09C1/02C09C3/04C09C3/08C09C3/12C08L83/04C08L83/07C08L23/08C08L77/10C08L5/08C08K13/06C08K9/00C08K9/08C08K9/04C08K3/26C08K3/36C08K7/10
CPCC09C1/021C08K2003/265C08K2201/003C08L83/04C08L2201/02C08L2201/08C08L2203/18C08L2205/025C08L2205/035C08L2205/16C08L2312/00C09C3/006C09C3/041C09C3/08C09C3/12C08L23/0869C08L77/10C08L5/08C08K13/06C08K9/00C08K9/08C08K9/04C08K3/26C08K3/36C08K7/10
Inventor 唐文易双
Owner 贺州钟山县双文碳酸钙新材料有限公司
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