JPH08209548A - High-polymeric flooring material and its production - Google Patents

Abstract

PURPOSE: To obtain a high-polymeric flooring material with the surface layer consisting of silicone rubber, excellent in cigarette heat resistance and maintenance-free antifouling effect, etc. CONSTITUTION: This material is such a high-polymeric flooring material that the surface layer consists of a silicone rubber layer excellent in heat resistance and antifouling effect, etc., and the lower layer (base body) consists of a polymeric material (e.g. a polyvinyl chloride resin) and can be bonded to floor surface via an adhesive. The flooring material is obtained by coating sheet-like molded form as the lower layer (base body) with a liquid silicone rubber.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a polymeric flooring material having excellent heat resistance (for example, cigarette heat resistance) and antifouling property (maintenance-free antifouling property), and a method for producing the same.

[0002]

2. Description of the Related Art Polymer flooring materials, especially PVC flooring materials, are currently widely used because of their excellent productivity, designability, and workability. In addition, in recent years, in order to impart functions such as heat resistance and antifouling property, the material constituting the floor material is cross-linked, fluorine or a silica-based additive is added to the surface layer, or a UV curable coating is applied to the surface. Although coating methods have been adopted, there is currently no polymer flooring material that has cigarette heat resistance and maintenance-free antifouling properties that can sufficiently satisfy the requirements.

[0003]

[Purpose] The present invention solves the above-mentioned problems of the prior art, uses a silicone rubber having excellent heat resistance, antifouling property, etc. for the surface layer and is composed of a material capable of adhering the lower layer to the floor surface with an adhesive. The purpose of the present invention is to provide a polymer floor material.

[0004]

[Structure] The present invention is a polymer floor having a silicone rubber layer having excellent heat resistance and antifouling property as a surface layer, and a lower layer (base) made of a material that can be adhered to a floor surface with an adhesive. Regarding materials Hereinafter, the constitution of the polymer flooring material of the present invention will be specifically described. The silicone rubber composition used for forming the silicone rubber layer on the lower layer (substrate) in the present invention has a degree of polymerization of about 5,000 to 10,000, an average molecular weight of 400,000 to 800,000, and a viscosity of several million to 1,000. It is composed mainly of organopolysiloxane (silicone raw rubber), which is a linear polymer of several million centistokes, and is mixed with fillers such as silica-based fillers and various additives. When a cross-linking agent (vulcanizing agent) is used. The main component is an organopolysiloxane which is a type of a polymer which is cured by heating when added and / or a linear polymer having a degree of polymerization of about 100 to 2,000, and a filler and various additives are blended in the same manner as the silicone raw rubber. A liquid type is mentioned. Examples of the organopolysiloxane include dimethyl type (dimethyl silicone rubber), methyl vinyl type (methyl vinyl silicone rubber), methyl phenyl vinyl type (methyl phenyl vinyl silicone rubber), and methyl fluoroalkyl vinyl type polysiloxane (fluorosilicone rubber). Can be mentioned. As the silicone rubber used in the present invention, commercially available general-purpose and heat-resistant grade silicone rubbers are particularly preferable from the viewpoint of availability. In addition, in the range that does not impair characteristics such as antifouling property and cigarette resistance,
The silicone rubber may be a blend of another polymer compound, for example, a natural rubber and / or a synthetic rubber other than the silicone rubber, or a modified silicone rubber such as a grafted silicone modified by a modifying means such as a grafting means. Can be used as rubber.

In the present invention, the filler to be added to the silicone rubber includes a reinforcing filler for the purpose of reinforcement and a non-reinforcing filler mainly for the purpose of increasing the amount. The type is not limited as long as it is excellent and chemically stable, and examples thereof include silica-based inorganic fillers. Particularly, by using a mica-based inorganic filler, cigarette resistance is significantly improved. Can be made. The amount of the filler used varies depending on the purpose of adding the filler, the type of silicone rubber, etc., but is 5 to 150 parts by weight, preferably 10 to 30 parts by weight, per 100 parts by weight of the rubber component. It For example, the mica-based inorganic filler is 1 part with respect to 100 parts by weight of the rubber component.
It is preferable to add 5 to 20 parts by weight. Further, for the purpose of improving the dispersion of these fillers in the silicone rubber, wetting agents for silicone resins, alkoxysilanes and siloxanes, hydroxysilanes and siloxanes, silazanes, organic acid esters, polyhydric alcohols, etc. May be used as one of the additives. Further, the heat resistance of the silicone rubber itself is excellent, and the cigarette resistance is remarkably improved by adding the mica-based inorganic filler as described above, but in the case where further heat resistance is required, A heat resistance improver such as red iron oxide, titanium oxide, cerium oxide, barium zirconate is added to the rubber component 100.
You may separately add about 0.5-5 weight part per weight part.

In the present invention, the synthetic resin material constituting the lower layer (substrate) having the above-mentioned silicone rubber layer as a surface layer is composed of a polymer material which can be adhered to the floor surface with an adhesive. If so, the type is not particularly limited, but polyvinyl chloride resin is excellent in terms of chemical resistance, ozone resistance, oil resistance, flame resistance, etc., and is very inexpensive. Is preferred,
In addition, synthetic resins such as polypropylene, polyethylene, and ethylene vinyl acetate copolymer resins (abbreviated names PP, PE, EVA) can also be used. The polymer flooring material having the silicone rubber layer of the present invention as the surface layer is obtained by adding the following crosslinking agent at the time of use to the silicone raw rubber in which various additives such as a filler and, if necessary, a wetting agent are blended. A silicone rubber compound was made into a kneading paste, and the paste was formed into a sheet, and the paste was formed from a polymer material that can be adhered to the floor surface with an adhesive that constitutes the lower layer. It can be produced by laminating a sheet-shaped molded product and performing a crosslinking reaction. As the crosslinking agent added to the silicone rubber composition, organic peroxide,
Examples thereof include fatty acid azo compounds and sulfur. Further, the silicone rubber composition can be crosslinked by energy rays such as radiation. Examples of the organic peroxide include benzoyl peroxide, bis-2,4-dichlorobenzoyl peroxide, dicumyl peroxide, ditertiary butyl peroxide, p-monochlorobenzoyl peroxide and 2,5-dimethyl-.
2,5-bis (t-butylperoxy) -hexane, tertiary butylcumyl peroxide, and the like,
The amount of addition was 0.1% with respect to 100 parts by weight of silicone rubber.
5 to 2.0 parts by weight. The silicone rubber layer of the polymeric flooring material of the present invention is formed by coating the above-mentioned base material (lower layer) with the liquid silicone rubber containing organopolysiloxane as a main component and curing the coating layer. You can also do it.

As the liquid silicone rubber, room temperature curing type (RTV, Room Temperature Vu) is used.
By using a silicone rubber, it can be cured without any special operation such as heating or pressing, and it has excellent adhesiveness and adheres well to most substrates, and if necessary, a primer. By using, it is possible to further improve the adhesiveness. Examples of the curing agent for the liquid silicone rubber include acetic acid type, alcohol type, oxime type, amine type, amide type, aminoxy type, acetone type, dehydrogenation type and dehydration type. Further, when a liquid silicone rubber having an ultraviolet curing property is used, it can be cured by irradiation with ultraviolet rays. The silicone rubber layer formed on the surface layer of the polymer flooring material by the method as described above has excellent heat resistance and cold resistance, exhibits good compression-restoration in a wide temperature range, and has weather resistance,
Although it exhibits excellent properties such as ozone resistance, electrical characteristics, chemical resistance, and hot water resistance, the polymer flooring material of the present invention is further provided with a silicone rubber layer when it is subjected to high load. It is preferable that the interface layer between the lower layer and the lower layer (substrate) is subjected to a co-crosslinking reaction to form a composite of both layers. In order to cause the co-crosslinking reaction, it is preferable to incorporate a crosslinking agent capable of causing the co-crosslinking reaction between different molecules at the interface into the material constituting the silicone rubber and / or the lower layer (substrate). As such a cross-linking agent, depending on the combination of silicone rubber and the material forming the lower layer (base),
A suitable cross-linking agent is selected. For example, in a flooring material composed of a combination of silicone rubber and a lower layer (substrate) of polyvinyl chloride, triazinedithiol, diallylphthalate, ethylenediaminemethacrylate, trimethylolpropanetrimethacrylate, A crosslinking agent such as triallyl isocyanurate is used. Hereinafter, the present invention will be described more specifically based on Examples.

Example 1 Surface layer composition (parts by weight) (PHR) General-purpose grade silicone rubber 100 (KE-675V, trade name of Shin-Etsu Silicone Co.) bis-2,4-dichlorobenzoyl peroxide (vulcanizing agent) 1.5 mica Inorganic filler 100 Crosslinking agent (triazinedithiol) 1.5 Lower layer formulation PVC (TK-800, trade name of Chuo Vinyl Co., Ltd.) 100 Plasticizer (DOP) 80 Filler (calcium carbonate) 150 Stabilizer (Zn-Ca) System) 1.5 The above-mentioned surface layer composition was kneaded and was subjected to a canender molding to a thickness of 0.5 mm to obtain a sheet 1. The lower layer composition was kneaded to obtain a sheet 2, both of which were laminated and heated at 120 ° C. to 140 ° C. for vulcanization to produce a target floor material. A cigarette proof test and a load test were performed on this floor material, and the results are shown in Table 1.

Example 2 Surface layer composition (without co-crosslinking agent of Example 1) Parts by weight (PHR) Heat resistant grade silicone rubber 100 (KE-552V, trade name of Shin-Etsu Silicone Co.) Bis-2,4-dichlorobenzoyl per Oxide (vulcanizing agent) 1.5 Mica-based inorganic filler 100 Lower layer formulation PVC (TK-800, product name of Chuo Vinyl Co., Ltd.) 100 Plasticizer (DOP) 80 Filler (calcium carbonate) 150 Stabilizer (Zn- Ca-based) 1.5 A target flooring material was manufactured in the same manner as in Example 1, and a cigarette proof test and a load test were conducted. The results are shown in Table 1.

[Table 1] In Table 1 above, for comparison with Example 1 and Example 2, the vinyl flooring material used as a comparative example has a structure in which a surface layer is 0.5 mm, a lower layer is 1.5 mm, and a cold gauze layer is laminated on the lowermost layer. This is a vinyl chloride floor material. In addition, the tests of the items “Masking” and “Leaving” used in the cigarette proof test results adopted in Examples 1 and 2 shown in Table 1 above were conducted as follows. Brushing: A lit cigarette is pressed against the sample surface to observe damage and visually evaluated. Discharge: A lit cigarette is left on the sample surface and the damage at that time is visually evaluated. Moreover, the test of the item of loadability was performed as follows. Load capacity: Scandinavian load evaluation test method (load; 1
(00 kg / wheel, 100 times). From the test results in Table 1 above, Example 1 is effective in cigarette resistance, stain resistance and load characteristics, and Example 2 is particularly effective in cigarette resistance. ing. On the other hand, when a vinyl flooring material is used as a comparative example, it is poor in cigarette resistance and stain resistance and is not excellent in load characteristics.

Next, concrete embodiments of the present invention will be shown. 1. A polymeric floor material, wherein the surface layer is a silicone rubber, and the lower layer (substrate) is composed of a polymeric material that can be adhered to the floor surface with an adhesive. 2. In the first polymeric floor material, the polymeric floor material in which the silicone rubber surface layer and / or the lower layer (base) contains a crosslinking agent, and the silicone rubber surface layer and the lower layer (base) are cross-linked. 3. In the first or second polymer-based flooring material, the silicone rubber surface layer is obtained by crosslinking (curing) a silicone rubber containing a crosslinking agent, and the lower layer (base) is a polymer composed of polyvinyl chloride resin. Floor material. 4. The polymeric floor material of the first, second or third polymeric floor material, wherein the silicone rubber surface layer contains a heat resistant inorganic filler.

5. A liquid silicone rubber is coated on a sheet-like molded body constituting a lower layer (base) formed of a polymer material capable of being adhered to a floor surface with an adhesive, and the coating layer is cured. 1. The method for producing a polymeric flooring material of 1. 6. Mold the silicone rubber paste into a sheet,
Characterized in that the sheet-shaped molded product is laminated with a sheet-shaped molded product constituting a lower layer (base) formed of a polymer material that can be adhered to the floor surface with an adhesive, and the laminate is subjected to a crosslinking treatment. The method for producing the first polymeric flooring described above. 7. In the fifth or sixth method for producing a polymer flooring material, the silicone rubber and / or the polymer material forming the lower layer (base) contains a co-crosslinking agent that forms a crosslinkage therebetween. The method for producing a polymeric flooring material according to the second, third or fourth method, further comprising the step of forming a co-crosslinking bond between the silicone rubber layer and the lower layer (substrate). 8. In the fifth, sixth or seventh method for producing a polymeric flooring material, the method for producing a polymeric flooring material in which the silicone rubber contains a heat resistant inorganic filler.

[0012]

[Effect] According to the present invention, a polymer flooring material having excellent heat resistance (for example, cigarette heat resistance) and antifouling property (maintenance-free antifouling property) is provided.

Claims (6)

[Claims] 1. A polymeric flooring material, wherein the surface layer is a silicone rubber, and the lower layer (substrate) is composed of a polymeric material that can be adhered to the floor surface with an adhesive. 2. The polymer flooring material according to claim 1, wherein
A polymer floor material in which the silicone rubber surface layer and / or the lower layer (substrate) contains a crosslinking agent, and the silicone rubber surface layer and the lower layer (substrate) are cross-linked. 3. The polymer floor material according to claim 1 or 2, wherein the silicone rubber surface layer is obtained by crosslinking (curing) a silicone rubber containing a crosslinking agent, and the lower layer (base).
Is a polymeric flooring material composed of polyvinyl chloride resin. 4. A sheet-shaped molded body constituting a lower layer (base) formed of a polymer material capable of being adhered to a floor surface with an adhesive, is coated with a liquid silicone rubber. A method for producing the polymer floor material described. 5. A sheet forming a lower layer (base) formed of a polymer material capable of forming a silicone rubber paste into a sheet and adhering the sheet formed body and an adhesive to the floor surface. The method for producing a polymeric flooring material according to claim 1, wherein the molded article is laminated. 6. The method for producing a polymer flooring material according to claim 4 or 5, wherein the silicone rubber and / or the polymer material forming the lower layer (base) contains a crosslinking agent. The method for producing a polymer flooring material according to claim 2 or 3, wherein a treatment for forming a cross-linkage bond is formed between the rubber layer and the lower layer (substrate).