阅读说明：本技术 一种spc石塑地板材料及其地板 (SPC stone plastic floor material and floor thereof ) 是由 阎伟伟 张金贵 于 2020-07-24 设计创作，主要内容包括：公开了一种SPC石塑地板材料,包括：PVC树脂100重量份；重质碳酸钙220-260重量份；纳米碳酸钙40-80重量份；硬脂酸2-4重量份；抗冲改性剂8-12重量份；色母粒4-8重量份。此外,公开了包含该地板材料的SPC石塑地板层和SPC石塑地板。所述SPC石塑地板不仅具有更好的力学性能,同时具有更低的尺寸变形率。(Disclosed is an SPC stone plastic flooring material comprising: 100 parts by weight of PVC resin; 220-260 parts of heavy calcium carbonate; 40-80 parts of nano calcium carbonate; 2-4 parts of stearic acid; 8-12 parts of impact modifier; 4-8 parts of color master batch. Further, an SPC stone floor layer and an SPC stone floor comprising the flooring material are disclosed. The SPC stone plastic floor not only has better mechanical property, but also has lower size deformation rate.)

1. An SPC stone-plastic flooring material comprising:

100 parts by weight of PVC resin;

220-260 parts of heavy calcium carbonate;

40-80 parts of nano calcium carbonate;

2-4 parts of stearic acid;

8-12 parts of impact modifier;

4-8 parts of color master batch;

it is characterized in that the preparation method is characterized in that,

the color master batch is prepared from the raw materials of PVC resin, EVA wax, C.I. pigment yellow 139, a composite dispersant and optional other additives; wherein the composite dispersant is selected from acrylpimaric acid grafted poly- (12-hydroxystearic acid) and lauric acid diethanolamide.

2. An SPC stone flooring material according to claim 1, wherein the PVC resin is selected from PVC resins produced by suspension process, having an average degree of polymerization of 1000-1150.

3. The SPC stone-plastic flooring material as claimed in claim 1, wherein the particle size of the heavy calcium carbonate is 300-500 mesh.

4. The SPC stone flooring material according to claim 1, wherein the nano calcium carbonate has an average particle size of 15 to 40 nm; the specific surface area is more than or equal to 40m²/g。

5. An SPC stone flooring material according to claim 1, wherein the impact modifier is selected from acrylate copolymers.

6. An SPC stone flooring material according to claim 1, wherein the EVA wax is selected from EVA waxes having a weight average molecular weight of 9300 and a VA content of 13-15%.

7. An SPC stone flooring material according to claim 1, wherein the weight ratio of acrylpimaric acid grafted poly- (12-hydroxystearic acid) to lauric acid diethanolamide (3-4): 1.

8. An SPC stone floor material according to claim 1, wherein the weight ratio of PVC resin, EVA wax, C.I. pigment yellow 139, composite dispersant and optional other auxiliaries in the color master batch raw material is (30-50): (4-6): (40-60): (4-5): (0-5).

9. An SPC stone-plastic flooring layer, characterized in that the flooring layer comprises an SPC stone-plastic flooring material according to any one of claims 1-8.

10. An SPC stone floor, characterized in that the floor comprises an SPC stone floor layer according to any one of claims 1-8.

Technical Field

The invention belongs to the technical field of stone-plastic floors; relates to an SPC stone plastic floor material and a floor thereof.

Background

SPC floors, also known as stone-plastic floors. The main components of SPC stone-plastic floor are PVC (polyvinyl chloride) and marble powder. The SPC stone plastic floor is green and environment-friendly, is usually installed in a locking manner, does not use an adhesive containing formaldehyde, is nontoxic and harmless, has no radioactive pollution and no pollution to the environment, belongs to a green and environment-friendly product, and can be recycled. The SPC stone plastic floor has a special transparent wear-resistant layer processed by high technology on the surface, has super-strong wear resistance, and is more and more popular among people in hospitals, markets, high-speed railway stations and other places with large pedestrian volume. In addition, the SPC stone plastic floor is waterproof and moistureproof and does not deform when meeting water; meanwhile, the flame retardant cable is insulating, flame retardant, resistant to acid and alkali corrosion and high in safety.

The SPC stone-plastic floor has novel design and color, multiple designs and colors can be selected, the color is gorgeous, natural and vivid, the design and color can be randomly spliced and combined, and the individual color is highlighted. In order to give different designs and colors to the floor, color concentrates with different properties are generally selected. The color master batch has good compatibility with an SPC floor material mainly comprising PVC resin and heavy calcium carbonate powder, and auxiliary agents such as a dispersing agent, a compatilizer and the like are usually required to be added.

Zhang Cai et al (plastics science and technology, 2019, 47(7), 111) disclose a wood-plastic composite comprising sisal cellulose crystallites MCF and a non-polar resin PP. In order to improve the interface bonding strength of the composite material, an RA-g-PEPA hyperdispersant modified by abietic acid is used. The results show that: the impact strength of the PP/MCF wood-plastic composite material can reach 16.8kJ/m at most²And shows better mechanical property and processing flow property. Microscopic morphology analysis shows that after the RA-g-PEPA hyperdispersant is added, the interfacial adhesion force of MCF and PP resin is enhanced, and the fracture mode of the wood-plastic composite material is changed. The above documents do not describe whether the hyperdispersant can be applied to PVC resins.

In the prior art, the mechanical properties and dimensional deformation rate of the resulting SPC stone-plastic flooring are still unsatisfactory due to the unfavorable interface between the PVC resin and the triple superphosphate powder.

Therefore, there is still a need to provide an SPC stone plastic flooring and flooring thereof, which address the above-mentioned drawbacks of the prior art.

Disclosure of Invention

The invention aims to provide an SPC stone plastic floor material and a floor thereof. Compared with the prior art, the SPC stone plastic floor not only has better mechanical property, but also has lower dimensional deformation rate.

In order to solve the technical problem, on one hand, the invention adopts the following technical scheme: an SPC stone-plastic flooring material comprising:

100 parts by weight of PVC resin;

220-260 parts of heavy calcium carbonate;

40-80 parts of nano calcium carbonate;

2-4 parts of stearic acid;

8-12 parts of impact modifier;

4-8 parts of color master batch;

it is characterized in that the preparation method is characterized in that,

the color master batch is prepared from the raw materials of PVC resin, EVA wax, C.I. pigment yellow 139, a composite dispersant and optional other additives; wherein the composite dispersant is selected from acrylpimaric acid grafted poly- (12-hydroxystearic acid) and lauric acid diethanolamide.

The SPC stone-plastic flooring material according to the present invention, wherein the PVC resin is selected from PVC resins produced by a suspension process, and the average degree of polymerization is 1000-1150.

In a specific embodiment, the PVC resin is selected from the group consisting of PVC SG-5 resin (Shandong dynasty group; average degree of polymerization 1050; CAS: 93050-82-9).

The SPC stone plastic flooring material provided by the invention is characterized in that the particle size of the heavy calcium carbonate is 300-500 meshes.

The SPC stone-plastic floor material provided by the invention is characterized in that the average particle size of the nano calcium carbonate is 15-40 nm; the specific surface area is more than or equal to 40m²/g。

The SPC stone flooring according to the present invention, wherein the impact modifier is selected from acrylate copolymers.

In a specific embodiment, the impact modifier is selected from the group consisting of ACR KM-355P (Rohm and Haas, USA).

The SPC stone flooring material according to the present invention, wherein the EVA wax is selected from EVA waxes having a weight average molecular weight of 9300 and a VA content of 13-15%.

In a specific embodiment, the EVA wax is selected from Luwax EVA3 (BASF; CAS number: 111-46-6).

The SPC stone-plastic floor material provided by the invention is characterized in that the weight ratio of the acrylpimaric acid grafted poly- (12-hydroxystearic acid) to the lauric acid diethanolamide (3-4) is 1.

In the present invention, acrylpimaric acid-grafted poly- (12-hydroxystearic acid) was synthesized and characterized according to Zhang Cai et al (plastics science, 2019, 47(7), 111).

In the present invention, other auxiliaries may be mentioned: antioxidants, ultraviolet absorbers, flame retardants, calcium stearate; and so on.

In a specific embodiment, the adjuvant is selected from the group consisting of antioxidant 1010 and calcium stearate.

The color concentrates of the present invention are prepared according to conventional techniques in the art.

In a specific embodiment, according to the formula, the PVC resin, the EVA wax, the composite dispersant and optional other additives are added into a high-speed mixer and stirred and mixed; then adding C.I. pigment yellow 139, and stirring uniformly; and adding the materials into a double-screw extruder for melting, plasticizing and granulating.

The SPC stone plastic flooring material of the present invention comprises, in the color master batch raw material, PVC resin, EVA wax, C.I. pigment yellow 139, composite dispersant and optionally other additives in a weight ratio of (30-50): 4-6): 40-60: (4-5): 0-5.

In another aspect, the present invention also provides an SPC stone-plastic floor layer, characterized in that the floor layer comprises the aforementioned SPC stone-plastic floor material according to the present invention.

Finally, the invention further provides an SPC stone-plastic flooring, characterized in that said flooring comprises an SPC stone-plastic flooring layer according to the invention as described above.

The inventor finds that the color master batch prepared by using the composite dispersing agent disclosed by the invention is beneficial to improving the adverse interface effect of PVC resin and coarse whiting powder together with nano calcium carbonate under the condition of not using other dispersing agents, and the obtained SPC stone plastic floor not only has better mechanical property, but also has lower size deformation rate.

Detailed Description

The invention will be further illustrated with reference to specific embodiments.

It should be understood that the detailed description of the invention is merely illustrative of the spirit and principles of the invention and is not intended to limit the scope of the invention. Furthermore, it should be understood that various changes, substitutions, deletions, modifications or adjustments may be made by those skilled in the art after reading the disclosure of the present invention, and such equivalents are also within the scope of the invention as defined in the appended claims.

In the present invention, all parts are parts by weight unless otherwise specified.

In the present invention, the acrylic pimaric acid grafted poly- (12-hydroxystearic acid) is prepared as follows: heating 30 parts by weight of abietic acid to 230 ℃ under the protection of nitrogen, and dropwise adding 8.58 parts by weight of acrylic acid solution; after the dropwise addition, the reaction is continued for 2 hours, and the reaction solution is naturally cooled to 200 ℃. Acid-base titration is used for measuring the acid value, and the acid value reaches about 275mgKOH/g, namely the acrylpimaric acid. Heating 30 parts by weight of 12-hydroxystearic acid to 100 ℃ under the protection of nitrogen, adding 0.375 part by weight of p-toluenesulfonic acid as a catalyst after complete melting, heating to 130 ℃, carrying out heat preservation reaction for 6 hours, cooling and discharging, and drying at 60 ℃ for 10 hours to obtain the poly- (12-hydroxystearic acid). Heating 12.36 parts by weight of acrylpimaric acid and 167.24 parts by weight of poly- (12-hydroxystearic acid) to 130 ℃, preserving heat for reaction for 10 hours, cooling and discharging to obtain the product.

In the present invention, the mechanical properties are evaluated by tensile strength. Tensile strength was measured according to ASTM 638-.

In the present invention, the dimensional deformation ratio is performed according to the industry common practice. The SPC stone-plastic flooring was left at 60 ℃ for 6 hours, and the dimensional deformation ratios (%) in the longitudinal direction and the width direction were measured.