What Fields Can Modified Calcium Carbonate Be Used For2020-12-11

(1) Polyvinyl chloride (PVC)

Compared with ordinary calcium carbonate, modified calcium carbonate particles are uniformly distributed in the original state of particles without agglomeration. It has excellent compatibility and dispersibility with PVC resin, is easy to plasticize, does not stick to rolls, and has excellent processing properties. It is beneficial to improve the processing efficiency, and the breaking strength and elongation of the product are obviously improved, and the physical and mechanical properties are good.

(2) Polypropylene (PP)

Using coupling agent tetrahydrofuran homopolyether (PTHF) to modify the surface of light calcium carbonate can reduce the oil absorption value of calcium carbonate to 22% and the contact angle to 68.6°. The modified calcium carbonate is filled into polypropylene and dispersed well in polypropylene, which can relieve the downward trend of tensile strength to a certain extent, so that the elongation at break of the composite material reaches 28.47% and the impact strength reaches 6.7kJ/m2 .

(3) High-density polyethylene (HDPE)

The aluminate coupling agent is used to mechanochemically modify heavy calcium carbonate. The aluminate coupling agent has a certain bonding effect on the surface of calcium carbonate particles, and the dispersibility of calcium carbonate particles is significantly improved after coating; The increase in the amount of modified calcium carbonate in high-density polyethylene (HDPE) reduces the amount of wear and friction of the composite material, and improves the anti-friction performance. When the amount is 8phr, the composite material has the best mechanical properties, tensile strength and impact strength Increased by 4.46% and 24.57% respectively.

(4) Low density polyethylene (LDPE)

Using stearic acid (with a dosage of 1.5%) and DL-411 aluminate (with a dosage of 0.5%), the activation index of modified calcium carbonate is 99.71%, the oil absorption value is 46.19mL/100g, and the final sedimentation volume is 2.3 The viscosity of the mixture of mL/g, 10g modified calcium carbonate and 100mL liquid paraffin is 4.4Pa•s. The modified calcium carbonate is filled into low-density polyethylene (LDPE). When the modified calcium carbonate content is 10%, the composite material has better mechanical properties.

(5) ABS plastic

After surface coating, the dispersibility of nano calcium carbonate in organic media is improved, and the surface changes from hydrophilic to lipophilic. Using it in ABS resin can improve the mechanical properties of ABS resin, such as impact strength. , Tensile strength, surface hardness, bending strength and thermal properties such as heat distortion temperature.

(6) Polyester (PBAT)

The double-layer coupling agent coating method is used to modify the surface of calcium carbonate, the modified calcium carbonate filling amount can reach 50%, and the comprehensive mechanical properties of the composite product are good. In the composite material, the modified calcium carbonate particles are completely infiltrated and covered by the PBAT resin matrix, and there is no dissolution phenomenon, and the mutual fluidity between the two is improved.

(7) Radiation cross-linked EPDM (EPDM)

Using titanate coupling agent 105 with unsaturated functional groups to modify calcium carbonate in situ, the dispersibility of modified calcium carbonate is improved; in radiation cross-linked EPDM, the surface of modified calcium carbonate is produced by oleic acid group and EPDM The chemical reaction allows calcium carbonate to participate in the cross-linking network of EPDM, which improves the tensile strength, 100% tensile stress and Shore A hardness of the composite material, so that calcium carbonate has reinforcement in the radiation cross-linked EPDM .

(8) Polylactic acid (PLA)

The surface coating of calcium carbonate by coupling agent increases the specific surface area of calcium carbonate, and thus increases the contact area with the substrate. When stressed, it will produce more silver streaks and plastic deformation zones, and absorb a lot of energy. The purpose of toughening and strengthening.

(9) PVC coated fabric

Modified heavy calcium carbonate can improve the compatibility of the polyvinyl chloride paste resin compounding system. In the same amount as ordinary heavy calcium, it can obtain a relatively low viscosity and enhance the adhesion to the polyester base fabric. It can reduce the amount of adhesive and improve the feel of the coating material. With an increase of 40%, it has no adverse effect on the processing performance, physical and mechanical properties, and thermal welding performance of the material. 

(10) Polyvinyl chloride (PVC) fire hose

Compared with ordinary calcium carbonate, modified calcium carbonate particles are uniformly distributed in the state of primary particles without agglomeration. Some of them are in the state of nano particles. Therefore, filling in polyvinyl chloride (PVC) fire hoses can not only improve the processing performance of the system , And endow products with better physical and mechanical properties to achieve the effect of toughening and strengthening.

(11) PVC cable material and flame retardant masterbatch

Use aluminate, titanate coupling agent, stearic acid to modify heavy calcium carbonate, and use this heavy calcium carbonate composite filler to prepare PVC cable material and flame retardant masterbatch, with excellent performance, and compound coating The use of agents will become one of the development trends of surface coating of heavy calcium carbonate.

(12) Polyetheretherketone

Using sulfonated hyperbranched polyaryl ether ketone to modify calcium carbonate whiskers can improve the dispersibility of calcium carbonate whiskers in the matrix, enhance the interaction between the two phases, and reduce the melt viscosity of the composite material in the processing temperature range. The Young's modulus, flexural modulus and toughness of the obtained composite material are all improved.

(13) Plastic film

Calcium carbonate is widely used in the film. The surface treatment of calcium carbonate is mostly combined with the base resin in the form of surface adsorption, physical winding, van der Waals force, etc. The dispersion is more uniform and the film performance is better.

(14) Food plastic packaging

Nano calcium carbonate, as a plastic filled superfine substance, has special effects in changing the properties of products. Studies have shown that nano food packaging materials have the barrier, antibacterial and fresh-keeping properties. It has been used in beer, beverages, fruits and vegetables, and dairy products. And other food packaging applications. To obtain a filling state with good dispersibility and small particle size, the nano-action energy must be weakened or reduced. At present, mechanical dispersion method is generally adopted, or by adding dispersant, drying treatment, etc.

(15) Breathable membrane

The breathable film is blended with about 50% of special calcium carbonate in a PE or PP carrier, and is oriented and stretched to a certain ratio after being extruded into a film. It is widely used in medicinal film, surgical gown, medical gloves, Women’s sanitary napkins, baby diapers, disposable sheets, cling film, composite film, cooked food packaging bags and other fields. The surface-modified calcium carbonate possesses more hydrophobic properties, excellent dispersion properties, and thermal stability than expected before it can be used in the production of breathable membranes.

(16) Room temperature vulcanization (RTV) one-component silicone rubber sealant

The surface coating of ultrafine calcium carbonate with silane coupling agent, the modified calcium carbonate has a better reinforcing effect on the sealant, its tensile strength is 0.57MPa, and the maximum strength elongation is 159.60%.

(17) Polyurethane sealant

Using methyl methacrylate (MMA) and silane coupling agent KH570 to copolymerize modified calcium carbonate, the modified calcium carbonate has a water contact angle of 60°, a sedimentation value of 1.36ml/g, and good dispersion in polyurethane , It shows thixotropic properties after being mixed with polyurethane, and improves the mechanical properties of polyurethane better than unmodified calcium carbonate.

(18) Silicone glue

Nano calcium carbonate can replace white carbon black to fill silicone glue to a certain extent. It is the main production material of silicone glue. Nano calcium carbonate is used as a filler and reinforcing agent of silicone glue, which can greatly reduce the cost of products. Improve the processing performance of the product, greatly improve the mechanical properties such as the tensile strength and tear strength of the rubber. By controlling the crystal form, particle size and surface treatment of the nanometer calcium carbonate, the product can obtain excellent thixotropy and anti-flow properties. Hang performance.

(19) Rubber products

Activated calcium carbonate after surface coating has a reinforcing effect in rubber, and its reinforcing performance is comparable to that of white carbon black. It is often used as a reinforcing agent for white, light-colored and colored rubber products. It can be used to manufacture tire cushion rubber, inner tubes, bicycle inner and outer tires, transmission belt covering rubber, rubber tubes, rubber cloth products and rubber shoes. It is also suitable for natural rubber, SBS and latex. SBS has obvious reinforcement effect and good coloring performance.

(20) Natural rubber vulcanizate

Resorcinol and hexamethylenetetramine are used to modify calcium carbonate. The mechanical properties of modified calcium carbonate natural rubber vulcanizates are significantly improved than that of unmodified calcium carbonate natural rubber vulcanizates. Calcium carbonate, natural rubber vulcanizate, the tensile strength is increased by 130%, the tensile strength is increased by 101%, and the tear strength is increased by 70%.

(21) Styrene butadiene rubber (SBR)

For the use of carboxylated polybutadiene (CPB) modified calcium carbonate as a reinforcing agent for SBR, the performance of the vulcanized rubber is 60% higher than that of unmodified calcium carbonate, and the tensile stress is increased by 300%. 70%, tear strength increased by 30%.

(22) Semi-steel radial tire inner liner

Adding 40 parts of modified calcium carbonate to the inner liner of semi-steel radial tires can improve the airtightness of the rubber, and has little effect on the flexural resistance and processing performance of the rubber. From the results of the tire factory test, the airtightness of the inner liner using 40 parts of modified calcium carbonate is 30% higher than that of the ordinary inner liner, and the cost is reduced by 3.65 yuan/kg. The high speed and Durability is not affected.

(23) Papermaking filler

The starch-coated modified calcium carbonate is used as a papermaking filler. The modified calcium carbonate has strong shear resistance and high retention rate, which makes the paper sheet strength performance higher, and the decrease in strength performance is significantly slowed.

(24) Reconstituted tobacco

Calcium carbonate is modified with sodium hexametaphosphate and citric acid (combination ratio is 1:l). The ash content of modified calcium carbonate added to reconstituted tobacco leaves is 8.25% higher than that of commercial calcium carbonate. Conventional smoke The indicators and sensory evaluation results are better than commercial calcium carbonate.

(25) Powder coating

Modified calcium carbonate acts as a skeleton in the powder coating, which can increase the thickness of the coating film and improve the wear resistance and durability of the coating. Generally, modified calcium carbonate is more expensive than other inorganic fillers, so it can reduce the cost of powder coatings while increasing its powdering rate and spraying area.

(26) Latex paint

The modified nano-calcium carbonate is used to prepare the latex coating with a PVC content of 43%. The surface of the coating with modified nano-calcium carbonate has good flatness, compactness, stain resistance, scrubbing resistance, and aging resistance. It has been greatly improved. Among them, nano-calcium carbonate modified with stearic acid and sodium sulfonate has a greater impact on tensile strength, while nano-calcium carbonate modified with stearic acid and titanate has a greater impact on stain resistance and scrubbing resistance. Sexual influence is significant.

(27) Electrophoresis paint

Calcium carbonate is modified with hydrofluorosilicic acid. The surface of the modified calcium carbonate is covered with a mixture of amorphous silicon and calcium fluoride to form a dense film, which greatly enhances the acid resistance of calcium carbonate and can be used for weak acid anodes Electrophoretic paint.

(28) PVC car chassis anti-stone strike primer

Calcium carbonate with a particle size of 40~80nm after being modified by fatty acid or fatty acid salt has good thixotropy. It is used as an anti-stone attack primer for PVC automobile chassis and has good thixotropy and yield value.

(29) Ink

The ink prepared with modified calcium carbonate has better body and viscosity, good printing performance, fast drying and no side effects. Due to the small particles, it exhibits excellent dispersibility, transparency, excellent gloss and hiding power in ink products, as well as excellent ink absorption and drying properties, so the printed products are delicate and the dots are complete. Especially after the extensive use of resin binders in inks, modified calcium carbonate has almost replaced other fillers with its excellent stability.

(30) Toothpaste

Guangdong Lafang Personal Care Products Co., Ltd. uses silica to coat micron spherical calcium carbonate particles to modify the surface of the friction agent calcium carbonate for toothpaste. The modified calcium carbonate is added to the toothpaste under the same wear value. In toothpaste, the compatibility with fluoride has been significantly improved.

(31) Daily necessities

Adding active nano-scale calcium carbonate to cosmetics can make the product delicate and smooth; as an additive, it can be made into a setting powder, which can eliminate the brightness of the base powder, protect the adhesion of the skin, and has a moderate oil absorption and anti-perspiration effect; Smooth powder, does not irritate the skin, has a uniform color, and has a certain hiding power.

(32) Artificial granite

The surface-modified calcium carbonate has low oil absorption and is an important raw material for artificial stone.

(33) Composite conductive powder

By coating and modifying calcium carbonate, it can improve its acid resistance in acidic environments; then the carbon.

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