CN112759919A - Matte plastic material and preparation method thereof - Google Patents

Abstract

The invention belongs to the field of polyurethane synthesis, and particularly relates to a matte plastic material and a preparation method thereof. The matte plastic material is prepared from polyether polyol, isocyanate, a filler, a pigment, a catalyst, an antioxidant, an ultraviolet absorbent, a wetting dispersant, a defoaming agent, matte powder and a latent curing agent, and has the advantages of excellent matte property, no need of polishing a construction surface layer, high strength, moderate viscosity, excellent operation time, durability, environmental protection and the like. The preparation method is scientific, reasonable, simple and feasible, and is suitable for industrial production.

Description

Matte plastic material and preparation method thereof

Technical Field

The invention belongs to the field of polyurethane synthesis, and particularly relates to a matte plastic material and a preparation method thereof.

Background

Polyurethane plastic fields are favored since birth due to the characteristics of good flatness, high compressive strength, moderate hardness and elasticity, bright and beautiful color, stable physical properties, excellent weather resistance and the like. On one hand, we see the advantages of the plastic materials, and the product has certain disadvantages: the coating is not matte, and is easy to drop mosquitoes before being cured; polishing is needed before constructing the surface layer.

The polyurethane material is in a mirror film leveling state after being normally cured, when light reaches the surface of the material, part of incident light is absorbed, part of incident light is reflected, and the reflected part enables the material to be glossy. Because the brightness of the product is good, dragonfly, mosquitoes and the like can be attracted to the surface of the product before the product is not cured after construction, so that the constructed and flat field has obvious defects and the overall effect of the field is influenced; the partial plastic products used in the room do not need to be constructed with surface layers, and if the light used in the room is reflected too much, the eyes of users are greatly injured. The existing water-based polyurethane material construction has a good matte effect, but the once construction thickness of the product cannot be too thick, the moisture volatilization is slow at low temperature, the construction efficiency is low, and the applicability is limited; the matt powder can achieve a matt effect in the construction process, but the addition amount is too large, the field is polluted, the dispersion is uneven, and the strength and the durability of the product are influenced; the matting powder is directly added into the conventional products in factories, so that the problems of pollution and uneven dispersion caused by field addition can be avoided, but the strength and durability of the products are influenced because a large amount of matting powder needs to be added, and the problem of inconsistent matting property of the upper layer and the lower layer of the products of some manufacturers exists for a long time.

Except the problem that the plastic product is not matte, the product has the problem that the surface is bright, and the construction progress is influenced because polishing treatment is needed before the construction surface layer. Under the background, the market urgently needs a stable matte plastic material to solve the problems of the existing products.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the matte plastic material overcomes the defects in the prior art, and has the advantages of excellent matte effect, no need of polishing before constructing a surface layer, good strength, constant operation time, excellent weather resistance, environmental protection and the like through reasonable design of a formula, selection of a catalyst, selection of an extinction assistant and the like, and the problems in the market are effectively solved. Meanwhile, the invention also provides a preparation method of the compound, which is scientific, reasonable, simple and feasible and is suitable for industrial production.

The matte plastic material provided by the invention comprises the following raw materials in percentage by weight:

wherein:

the polyether polyol is a polyol having a functionality of 2-3 and a number average molecular weight of 2000-6000. Preferably, the composition of DL-4000 and MN-3050 in a mass ratio of 1:1, or the composition of DL-2000 and EP-330N in a mass ratio of 1:1 (both produced by Daihu chemical group, Inc. in Shandong).

The isocyanate is diphenylmethane diisocyanate, preferably MDI-50 (Nicotiana Vanhua polyurethane Co., Ltd.).

The filler is 800 meshes of talcum powder or 600 meshes of talcum powder; the pigment is iron oxide green or iron oxide red.

The catalyst is preferably VP0245(Borchers corporation).

The antioxidant is preferably 2, 6-di-tert-butyl-4-methylphenol; the ultraviolet absorber is preferably 4-benzoyloxy-2, 2,6, 6-tetramethylpiperidine.

The wetting and dispersing agent is preferably BYK-W968 (Bick chemical, Germany); the defoamer is preferably BYK-066N (Pyck chemical, Germany).

The matte powder is preferably CT-103 (micro-nano chemical plant of Changtai, Shouguang, Shandong province).

The latent curative is preferably ALT-101(CARBON chemical research institute).

The preparation method of the matte plastic material comprises the following steps:

(1) putting polyether polyol into a reaction kettle, adding a filler, a pigment, an antioxidant and an ultraviolet absorbent in sequence while stirring, heating to 90-100 ℃, carrying out vacuum dehydration for 2-4h until the water content is 0.5-0.8 per mill, cooling to 30-40 ℃, adding isocyanate, reacting for 2-3 h at 85-90 ℃, cooling to 40-60 ℃, adding a wetting dispersant, matte powder, a catalyst, a latent curing agent and a defoaming agent in sequence, stirring for 30-40 min, and barreling to obtain a product;

(2) during construction, the matte plastic material product is directly paved on the foundation.

Compared with the prior art, the invention has the following beneficial effects:

1. the product of the invention has excellent matte property and high strength. The mechanism of the product is that proper operation time is controlled, most of matte components float up to the surface, high-efficiency matte powder is selected, the integral dosage of the matte powder is obviously less, the excellent matte effect is achieved, and the influence of adding a large amount of matte powder on the product strength is avoided. The product of the invention selects the high-efficiency matte powder with low oil absorption value, and is matched with high-quality polyether polyol, isocyanate, latent curing agent, catalyst and other raw materials, so that the excellent performance of the product is ensured. The product is matched with a proper wetting dispersant, so that the stable existence of the filler and the matte powder in the product after long-term storage is ensured, and the matte property is uniform and stable.

2. The invention has moderate viscosity and moderate operation time. The added matte powder can reduce the fluidity of the product to a great extent, and the proper types of wetting dispersant and catalyst are selected to ensure that the patent product has moderate viscosity, good fluidity and excellent operability at the same time under the condition of excellent dust resistance.

3. The matte product can form a microcosmic rough surface at the same time, a polishing process before a surface layer is laid on a field is omitted, and the construction efficiency is effectively improved.

4. The invention has excellent weather resistance and is environment-friendly. The product still selects the auxiliary agent with high weather resistance in the industry, and simultaneously, because the addition amount of the matting powder is small, the phenomenon that a large amount of glue is absorbed is avoided, the excellent wrapping property of the product on the pigment is ensured, and the product can be used for a long time; meanwhile, raw materials with low VOC and high environmental protection level are selected, the product is odorless in the construction process, and can be normally used in a short time after the construction is finished.

Detailed Description

The invention is further illustrated by the following examples without restricting its scope.

Example 1

(1) Adding polyether polyol DL-4000250 g and polyether polyol MN 3050250 g into a flask, sequentially adding 100g of 800-mesh talcum powder, 20g of iron oxide green, 10g of 2, 6-di-tert-butyl-4-methylphenol and 10g of 4-benzoyloxy-2, 2,6, 6-tetramethylpiperidine under stirring, heating to 90 ℃, carrying out vacuum dehydration for 4h until the water content is 0.5 per thousand, cooling to 30 ℃, adding MDI-50300 g, reacting at 85 ℃ for 3h, cooling to 40 ℃, sequentially adding BYK-W96810 g, CT-10320 g, VP 024510 g, ALT-10110 g and BYK-066N 10g, stirring for 30min, and barreling to obtain a product;

(2) during construction, the matte plastic material is directly paved on a foundation.

Example 2

(1) Adding polyether polyol DL-2000265 g and polyether polyol EP-330N 265g into a flask, sequentially adding 600-mesh talcum powder 200g, iron oxide red 10g, 2, 6-di-tert-butyl-4-methylphenol 5g and 4-benzoyloxy-2, 2,6, 6-tetramethylpiperidine 5g under stirring, heating to 100 ℃, carrying out vacuum dehydration for 2h until the moisture is 0.8 per thousand, cooling to 40 ℃, adding MDI-50220 g, reacting for 2h at 90 ℃, cooling to 60 ℃, sequentially adding BYK-W9685 g, CT-10310 g, VP 02455 g, ALT-1015 g and BYK-066N 5g, stirring for 40min, and barreling to obtain a product;

(2) during construction, the matte plastic material is directly paved on a foundation.

Example 3

(1) Adding polyether polyol DL-4000300 g and polyether polyol MN 3050300 g into a flask, sequentially adding 105g of 800-mesh talcum powder, 15g of iron oxide green, 6g of 2, 6-di-tert-butyl-4-methylphenol and 7g of 4-benzoyloxy-2, 2,6, 6-tetramethylpiperidine under stirring, heating to 95 ℃, carrying out vacuum dehydration for 3h until the moisture is 0.7 per thousand, cooling to 35 ℃, adding MDI-50225 g, reacting at 88 ℃ for 2.5h, cooling to 50 ℃, sequentially adding BYK-W9686 g, CT-10315 g, VP 02458 g, ALT-1017 g and BYK-066N 6g, stirring for 35min, and barreling to obtain a product;

(2) during construction, the matte plastic material is directly paved on a foundation.

The data of the products obtained in examples 1 to 3 were compared with those of conventional plastic materials and plastic products of matting powder which were commercially available, and the test results are shown in Table 1.

TABLE 1

Aging resistance test conditions: placing the sample at 340nm wavelength with illumination intensity of 0.51W/m²In an aging resistant box for 500 h.

As can be seen from the test data in Table 1, the matte property of the matte plastic product of the invention is obviously superior to that of the conventional plastic product; the operation time, the strength and the aging resistance are not different from those of the conventional plastic products, and are obviously superior to the products which are only added with the extinction powder directly; the product does not need to be polished in front of a construction surface layer, so that the defects of the product in the market are effectively overcome, and the application effect is excellent.

Of course, the foregoing is only a preferred embodiment of the invention and should not be taken as limiting the scope of the embodiments of the invention. The present invention is not limited to the above examples, and equivalent changes and modifications made by those skilled in the art within the spirit and scope of the present invention should be construed as being included in the scope of the present invention.

Claims (10)

1. A matte plastic material is characterized in that: the composite material consists of the following raw materials in percentage by weight:

2. the matte plastic material according to claim 1, wherein: the polyether polyol is a polyol having a functionality of 2-3 and a number average molecular weight of 2000-6000.

3. The matte plastic material according to claim 1, wherein: the isocyanate is diphenylmethane diisocyanate.

4. The matte plastic material according to claim 1, wherein: the filler is 800 meshes of talcum powder or 600 meshes of talcum powder; the pigment is iron oxide green or iron oxide red.

5. The matte plastic material according to claim 1, wherein: the catalyst is VP 0245.

6. The matte plastic material according to claim 1, wherein: the antioxidant is 2, 6-di-tert-butyl-4-methylphenol; the ultraviolet absorbent is 4-benzoyloxy-2, 2,6, 6-tetramethylpiperidine.

7. The matte plastic material according to claim 1, wherein: the wetting dispersant is BYK-W968; the defoaming agent is BYK-066N.

8. The matte plastic material according to claim 1, wherein: the matte powder is CT-103.

9. The matte plastic material according to claim 1, wherein: the latent curing agent is ALT-101.

10. A process for preparing a matte plastic material according to any one of claims 1 to 9, characterized in that: the method comprises the following steps:

(1) putting polyether polyol into a reaction kettle, adding a filler, a pigment, an antioxidant and an ultraviolet absorbent in sequence while stirring, heating to 90-100 ℃, carrying out vacuum dehydration for 2-4h until the water content is 0.5-0.8 per mill, cooling to 30-40 ℃, adding isocyanate, reacting for 2-3 h at 85-90 ℃, cooling to 40-60 ℃, adding a wetting dispersant, matte powder, a catalyst, a latent curing agent and a defoaming agent in sequence, stirring for 30-40 min, and barreling to obtain a product;

(2) during construction, the matte plastic material product is directly paved on the foundation.