Surface treatment agent and method for producing the same, elastomer article, and surface treatment method

Abstract

To provide a surface treatment agent capable of forming a surface treatment layer that is non-sticky to elastomer surfaces such as rubber, and effectively adapts to the stretching and shrinking of rubber and the like and a method for producing the same, a surface treatment method, and an elastomer article having such a surface treatment layer.SOLUTION: A surface treatment agent contains a fluorine-containing compound represented by the following formula (1), a modified polyolefin resin, a silane coupling agent and an acid catalyst. In the formula (1), R1 represents a group including a fluoroalkyl group, R2 represents an alkyl group or an alkoxyalkyl group, R3 and R4 independently represent a hydrogen atom or a monovalent organic group, x represents an integer of 1-100 and y represents an integer of 0-100.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a surface treatment agent, a method for producing the same, an elastomer article, and a surface treatment method. [Background technology]

[0002] Certain fluorine-based compounds are known to impart excellent surface properties such as water repellency, oil repellency, non-stick properties, and antifouling properties when used in surface treatment of substrates. Surface treatment layers formed by surface treatment agents containing such fluorine-based compounds are provided as functional thin films, such as antifouling layers, on a wide variety of substrates, including glass, plastics, fibers, and building materials (see Patent Document 1). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2014-196432 [Overview of the project] [Problems that the invention aims to solve]

[0004] There is a need to apply the above-mentioned fluorine-based compounds to elastomers such as rubber to provide surface properties such as water repellency to the elastomer surface, as well as to improve the non-stick properties of the elastomer surface. On the other hand, there is a problem that cracks may occur in the surface treatment layer using the above-mentioned fluorine-based compounds as the elastomer expands and contracts. Therefore, there is a need for a surface treatment agent that can improve the non-stick properties of the elastomer surface and form a surface treatment layer that also has conformability.

[0005] The present invention has been made in view of the above problems, and provides a surface treatment agent capable of forming a surface treatment layer that has non-stick properties and good followability to the expansion and contraction of elastomers such as rubber on the surface of the elastomer, a method for producing the same, a surface treatment method, and an elastomer article having such a surface treatment layer.

Means for Solving the Problems

[0006] In order to solve such problems, the present invention contains a fluorine-containing compound represented by the following formula (1), a modified polyolefin resin, a silane coupling agent, and an acid catalyst, and the modified polyolefin resin is Acid-modified polyolefin resins It provides a surface treatment agent characterized by being as follows.

[0007]

Chemical formula

[0009] , 1 , 3 , Acid-modified polyolefin resins ,

[0008] , , represents a group containing a fluoroalkyl group, R 2 represents an alkyl group or an alkoxyalkyl group, R 3 and R 4 each independently represents a hydrogen atom or a monovalent organic group, x is an integer from Ⅰ to 100, and y is an integer from 0 to 100.

[0008] Further, the present invention includes a base having an elastomer surface and a surface treatment layer covering at least a part of the elastomer surface of the base, and the surface treatment layer contains at least a fluorine-containing compound represented by the following formula (1), a modified polyolefin resin, and a silane coupling agent, and the modified polyolefin resin is Acid-modified polyolefin resins It provides an elastomer article characterized by being as follows.

[0009]

Chemical formula

[0010] The present invention also provides a surface treatment method for performing surface treatment on a substrate to be treated using the above surface treatment agent, which includes a step of forming a surface treatment layer on the surface of the substrate to be treated by immersing the substrate to be treated in the surface treatment agent.

Advantages of the Invention

[0011] According to the present invention, there can be provided a surface treatment agent capable of forming a surface treatment layer having non-stick properties and good followability to the expansion and contraction of elastomers such as rubber on the surface of an elastomer, a method for producing the same, a surface treatment method, and an elastomer article having such a surface treatment layer.

Modes for Carrying out the Invention

[0012] The surface treatment agent according to Aspect 1 of the present invention contains a fluorine-containing compound represented by the following formula (1), a modified polyolefin-based resin, a silane coupling agent, and an acid catalyst.

[0013]

Chemical formula

[0014] As Aspect 2 of the present invention, in the above Aspect 1, the silane coupling agent may be 3-mercaptopropyltrimethoxysilane and / or tetraethoxysilane.

[0015] In a third aspect of the present invention, the acid catalyst in the first or second aspect may be an organic acid.

[0016] In a fourth aspect of the present invention, in any of the above aspects 1 to 3, the acid catalyst may be acetic acid.

[0017] In a fifth aspect of the present invention, in any of the above aspects 1 to 4, the modified polyolefin resin may be an acid-modified polyolefin resin or a hydroxyl-modified polyolefin resin.

[0018] As an embodiment 6 of the present invention, in any of embodiments 1 to 5 above, it is sufficient that y is 0 in formula (1).

[0019] As an embodiment 7 of the present invention, in any of embodiments 1 to 6 above, in formula (1), R 1 The group containing the fluoroalkyl group represented by may be the group shown in formula (2) below.

[0020] [ka] In equation (2) above, p is an integer between 0 and 2.

[0021] As an embodiment 8 of the present invention, in any of embodiments 1 to 7 above, in formula (1), R 2 Any methyl group will do.

[0022] As an embodiment 9 of the present invention, in any of embodiments 1 to 8 above, x in formula (1) may be an integer from 1 to 10.

[0023] As a 10th aspect of the present invention, it may be used for surface treatment of an elastomer surface in any of the above aspects 1 to 9.

[0024] Furthermore, a method for producing a surface treatment agent according to embodiment 11 of the present invention includes a step of stirring the fluorine-containing compound, the modified polyolefin resin, and the silane coupling agent for 10 minutes or more in the presence of the acid catalyst.

[0025] Furthermore, an elastomer article according to embodiment 12 of the present invention comprises a base having an elastomer surface and a surface treatment layer covering at least a portion of the elastomer surface of the base, wherein the surface treatment layer contains at least a fluorine-containing compound represented by the following formula (1) and a modified polyolefin resin.

[0026] [ka] In the above equation (1), R 1 R represents a group containing a fluoroalkyl group. 2 R represents an alkyl group or alkoxyalkyl group, 3 and R 4 Each of these independently represents a hydrogen atom or a monovalent organic group, x is an integer from 1 to 100, and y is an integer from 0 to 100.

[0027] Furthermore, a surface treatment method according to embodiment 13 of the present invention is a surface treatment method for performing a surface treatment on a substrate to be treated using the above-mentioned surface treatment agent, and includes the step of forming a surface treatment layer on the surface of the substrate to be treated by immersing the substrate in the surface treatment agent.

[0028] In aspect 14 of the present invention, in aspect 13, the substrate to be treated may be immersed in the surface treatment agent for 3 minutes or more.

[0029] The following describes one embodiment of the present invention. [Surface treatment agent] The surface treatment agent according to this embodiment is particularly suitable for surface treatment of elastomers such as rubber, and is used to form a surface treatment layer that functions as a functional layer (e.g., a water-repellent layer, a non-stick layer, etc.).

[0030] The surface treatment agent according to this embodiment contains a fluorine-containing compound represented by the following formula (1), a modified polyolefin resin, a silane coupling agent, and an acid catalyst.

[0031] [ka] In the above equation (1), R 1 R represents a group containing a fluoroalkyl group. 2 R represents an alkyl group or alkoxyalkyl group, 3 and R 4 Each of these independently represents a hydrogen atom or a monovalent organic group, x is an integer from 1 to 100, and y is an integer from 0 to 100.

[0032] In the above equation (1), R 1 Examples of fluoroalkyl groups represented by include -CF3, -C2F5, -C3F7, and -C6F 13 -C7F 15 -C etc. q F 2q+1 Examples include fluoroalkyl groups represented by (q=1~10) and oxyfluoroalkylene groups, of which the oxyfluoroalkylene group represented by the following formula (2) is preferred.

[0033] [ka] In equation (2) above, p is an integer between 0 and 2.

[0034] In the above equation (1), R 2 Examples of alkyl groups represented by R include alkyl groups having 1 to 2 carbon atoms, such as methyl groups and ethyl groups. 2 Examples of alkoxyalkyl groups represented by R include alkoxyalkyl groups having 2 to 4 carbon atoms, such as methoxymethyl group, methoxyethyl group, ethoxymethyl group, and ethoxyethyl group. Among these, R 2The group represented is preferably an alkyl group, and particularly preferably a methyl group.

[0035] In the above equation (1), R 3 and R 4 Examples of organic groups represented by the formulas (i) to (v) below include the organic groups shown in the following formulas.

[0036] [ka]

[0037] In formula (1) above, trialkoxysilyl group or trialkoxykoxysilyl group (-Si(OR 2 The number x of intermediate chains (-CH2-CH-) to which )3) is attached is 1 to 100, preferably 1 to 50, more preferably 1 to 10, and particularly preferably 2 to 3. Also, the intermediate chain (-CH2-CR 3 R 4 The number y (-) is between 0 and 100, preferably between 0 and 50, more preferably between 0 and 10, and most preferably 0.

[0038] Suitable compounds for the above-mentioned fluorine-based compounds include those represented by formulas (3) to (7) below. In particular, if the above-mentioned fluorine-based compound is a compound represented by formula (3) or formula (6) (a compound where y=0 in formula (1)), the proportion of fluorine atoms in one molecule becomes large.

[0039] [ka] In equation (3) above, x' is either 2 or 3.

[0040] [ka] In the above equation (4), R 1′ This is a base represented by -CF(CF3)OCF2CF(CF3)OC3F7. Also, xa is an integer between 1 and 100.

[0041] [ka] In the above equation (5), R 1′ This is a base represented by -CF(CF3)OCF2CF(CF3)OC3F7. Also, xb is an integer from 1 to 100, and yb is an integer from 1 to 500.

[0042] [ka] In equation (6) above, xc is an integer between 1 and 10, and yc is an integer between 0 and 100.

[0043] [ka] In equation (7) above, xd is an integer between 1 and 10, and yd is an integer between 0 and 100.

[0044] The fluorine-containing compound represented by formula (1) above is obtained by polymerizing the monomer represented by formula (Ib) below and the monomer represented by formula (Ic) below in the presence of the fluorine-containing peroxide represented by formula (Ia) below. The reaction product (fluorine-containing compound) contains a group (R) containing a fluoroalkyl group. 1 The oligomer may contain oligomers in which the compound is introduced at only one end, in any proportion.

[0045] [ka] In formulas (Ia) to (Ic), R 1 R represents a group containing a fluoroalkyl group. 2 R represents an alkyl group or alkoxyalkyl group. 3 and R 4 Each of these independently represents a hydrogen atom or a monovalent organic group.

[0046] Modified polyolefin resins are obtained by subjecting a polyolefin resin, used as a precursor, to a modification treatment using a modifying agent having functional groups, and are polyolefin resins having functional groups. Examples of modified polyolefin resins include acid-modified polyolefin resins and hydroxyl-modified polyolefin resins. Examples of these acid-modified polyolefin resins and hydroxyl-modified polyolefin resins include Unistoll® XP03F, Unistoll® XP04A, and Unistoll® P-801 (all manufactured by Mitsui Chemicals, Inc.), which are commercially available and can be used, but it is preferable to use Unistoll® XP04A.

[0047] The polyolefin resin used as a precursor may be a polymer composed solely of repeating units derived from olefin monomers, or it may be a copolymer having repeating units derived from olefin monomers as well as repeating units derived from monomers other than olefin monomers.

[0048] Examples of the polyolefin resins mentioned above include homopolymers and copolymers of olefins having 2 to 8 carbon atoms, and copolymers of olefins having 2 to 8 carbon atoms with other monomers. Specifically, examples include polyethylene such as high-density polyethylene (HDPE), low-density polyethylene (LDPE), and linear low-density polyethylene resin, polypropylene, polyisobutylene, poly(1-butene), poly-4-methylpentene, polyvinylcyclohexane, polystyrene, poly(p-methylstyrene), poly(α-methylstyrene), ethylene-propylene block copolymer, ethylene-propylene random copolymer, ethylene-1-butene copolymer, ethylene-4-methyl-1-pentene copolymer, ethylene-hexene copolymer, and other α-olefin copolymers, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-methyl methacrylate copolymer, ethylene-vinyl acetate-methyl methacrylate copolymer, and ionomer resins.

[0049] The modifier used to obtain the acid-modified polyolefin resin may be any compound having a functional group in its molecule that can contribute to the crosslinking reaction described later. Examples of functional groups that can contribute to the crosslinking reaction include carboxyl groups, groups derived from carboxylic acid anhydrides, carboxylic acid ester groups, hydroxyl groups, epoxy groups, amide groups, ammonium groups, nitrile groups, amino groups, imide groups, isocyanate groups, acetyl groups, thiol groups, ether groups, thioether groups, sulfone groups, phosphone groups, nitro groups, urethane groups, halogen atoms, and the like. Of these functional groups, carboxyl groups, groups derived from carboxylic acid anhydrides, carboxylic acid ester groups, hydroxyl groups, ammonium groups, amino groups, imide groups, and isocyanate groups are preferred. The modifier used to obtain the acid-modified polyolefin resin may also be a compound having two or more of the above functional groups in its molecule.

[0050] Acid-modified polyolefin resins are obtained, for example, by reacting a polyolefin resin with unsaturated carboxylic acids such as maleic acid, fumaric acid, itaconic acid, citraconic acid, glutaconic acid, tetrahydrophthalic acid, and aconitic acid, and / or unsaturated carboxylic acid anhydrides such as maleic anhydride, itaconic anhydride, glutaconic anhydride, citraconic anhydride, aconitic anhydride, norbornenedicarboxylic acid anhydride, and tetrahydrophthalic anhydride, thereby introducing carboxyl groups and / or groups derived from carboxylic acid anhydrides (graft modification).

[0051] Modifiers used to obtain hydroxyl-modified polyolefin resins include, for example, hydroxyl-containing (meth)acrylic acid esters such as hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate, glycerol (meth)acrylate, lactone-modified hydroxyethyl (meth)acrylate, polyethylene glycol (meth)acrylate, and polypropylene glycol (meth)acrylate; and hydroxyl-containing vinyl ethers such as 2-hydroxyethyl vinyl ether, diethylene glycol monovinyl ether, and 4-hydroxybutyl vinyl ether.

[0052] The weight-average molecular weight (Mw) of the modified polyolefin resin should be approximately 10,000 to 2,000,000, preferably 20,000 to 1,500,000, more preferably 25,000 to 250,000, and particularly preferably 30,000 to 150,000. The weight-average molecular weight (Mw) can be, for example, the value obtained by gel permeation chromatography (GPC) using tetrahydrofuran as the solvent, on a standard polystyrene basis.

[0053] The surface treatment agent according to this embodiment contains a silane coupling agent. Examples of silane coupling agents include 3-mercaptopropyltrimethoxysilane and tetraethoxysilane (TEOS,Si(OC2H5)4), and the agent may contain either one or both. By containing 3-mercaptopropyltrimethoxysilane or tetraethoxysilane as the silane coupling agent in the surface treatment agent according to this embodiment, the surface treatment layer formed on the elastomer surface using the surface treatment agent can be given good non-stick properties and good conformability, and crack generation due to expansion and contraction of the elastomer can be suppressed. In addition, other silane coupling agents (e.g., 3-aminopropyltrimethoxysilane, etc.) may be included as long as 3-mercaptopropyltrimethoxysilane and tetraethoxysilane are included.

[0054] The solvent included in the surface treatment agent according to this embodiment can be any solvent that is capable of dissolving the modified polyolefin resin and does not damage the elastomer that is the target of surface treatment by the surface treatment agent according to this embodiment. For example, toluene, n-hexane, cyclohexane, methylcyclohexane, xylene, methyl ethyl ketone, methyl isobutyl ketone, etc., can be used.

[0055] Furthermore, the surface treatment agent according to this embodiment preferably contains an acid catalyst. The acid catalyst can be miscible with the solvent, and for example, organic acids such as acetic acid, citric acid, and malic acid can be used, with acetic acid being preferred. The concentration of the acid catalyst in the surface treatment agent may be 0.20 to 0.50 mol / L, and preferably around 0.32 to 0.36 mol / L. This improves the reactivity when forming the surface treatment layer, making it possible to form a surface treatment layer with good non-stick properties and conformability.

[0056] The content ratio (by mass) of the fluorine-containing compound and the modified polyolefin resin in the surface treatment agent according to this embodiment may be, for example, about 1:0.1 to 1:2.5, and preferably about 1:0.5 to 1:2. The content ratio (by mass) of the fluorine-containing compound and the silane coupling agent may be, for example, about 1:0.1 to 1:2.0, and preferably about 1:0.5 to 1:1.5. Furthermore, the content ratio (by mass) of the fluorine-containing compound and the acid catalyst may be, for example, about 1:0.5 to 1:4.0, and preferably about 1:1.5 to 1:2.5. By having the content ratio (by mass) of the fluorine-containing compound, the modified polyolefin resin, the silane coupling agent, and the acid catalyst within the above range, good non-stick properties can be imparted to the surface treatment layer formed using the surface treatment agent.

[0057] The surface treatment agent according to this embodiment can be prepared by mixing the above-mentioned fluorine-containing compound, modified polyolefin resin, silane coupling agent, and solvent, and then adding an acid catalyst and stirring. The stirring time (reaction time) should be 5 minutes or more, preferably 10 to 120 minutes, and more preferably 50 to 90 minutes. If the stirring time (reaction time) is less than 5 minutes, there is a risk that a surface treatment layer cannot be formed on the surface of the substrate to be treated, or even if a surface treatment layer can be formed, there is a risk that sufficient non-stick and conformability cannot be imparted.

[0058] According to the above surface treatment agent, a surface treatment layer can be formed on the surface of an elastomer such as rubber that is non-adhesive and has good conformability to the expansion and contraction of rubber and other materials.

[0059] [Surface treatment method] The surface treatment method in this embodiment is a surface treatment method that performs surface treatment on the surface of an elastomer material to be treated using a surface treatment agent according to this embodiment. The surface treatment method includes the step of forming a surface treatment layer by applying the surface treatment agent according to this embodiment to the surface of the substrate to be treated.

[0060] The substrate to be treated can be any substrate whose surface to be treated with the surface treatment agent is composed of an elastomer. For example, it may be natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), chloroprene rubber (CR), butyl rubber (IIR), styrene-butadiene rubber (SBR), acrylic rubber (ACM, ANM), epichlorohydrin rubber (CO, ECO), urethane rubber (AU, EU), silicone rubber (VMQ, FVMQ), acrylonitrile butadiene rubber (NBR), ethylene propylene rubber (EPM, EPDM), fluororubber (FKM, FEPM), or rubber products (e.g., O-rings, X-rings, umbrellas, valves, etc.) composed of these elastomers (rubbers), or it may be a composite of elastomer (rubber) and metal or resin, etc., having an elastomer surface.

[0061] In this embodiment, the surface treatment layer can be formed by immersing the substrate to be treated in the surface treatment agent according to this embodiment, thereby forming a surface treatment layer that possesses both non-stick properties and conformability. The area in which the surface treatment layer is formed may be a part of the elastomer surface of the substrate to be treated, or it may be the entire surface.

[0062] The immersion time of the substrate to be treated in the surface treatment agent may be, for example, 1 minute or more, 3 minutes or more, and preferably 3 to 5 minutes. If the immersion time is less than 1 minute, non-stick properties can be imparted to the surface treatment layer formed on the surface of the substrate to be treated, but sufficient conformability may not be provided.

[0063] In this embodiment, the coating film formed on the surface of the substrate to be treated may be heated by immersing the substrate in a surface treatment agent. Examples of heating methods include heating in an oven and heating by a hot press, but are not particularly limited. As for heating conditions, for example, it is about 100 to 180°C for about 10 to 60 minutes, preferably about 120 to 160°C for about 10 to 30 minutes. By forming a surface treatment layer on the elastomer surface of the substrate to be treated in this way, an elastomer article can be manufactured comprising a base having an elastomer surface and a surface treatment layer covering at least a part of the elastomer surface of the base.

[0064] The embodiments described above are provided to facilitate understanding of the present invention and are not intended to limit it. Accordingly, each element disclosed in the above embodiments is intended to include all design modifications and equivalents that fall within the technical scope of the present invention. [Examples]

[0065] The present invention will be described in more detail below with reference to examples, but the present invention is not limited in any way to the following examples and test examples.

[0066] [Manufacturing Example 1] Manufacturing example of a surface treatment agent The fluorine-containing compound shown in formula (5) above, a modified polyolefin resin (UNISTOL® XP04A, manufactured by Mitsui Chemicals, Inc.), and a silane coupling agent (3-aminopropyltrimethoxysilane (APTMS), 3-mercaptopropyltrimethoxysilane (MPTMS), tetraethoxysilane (TEOS), or DOWSIL) TMSurface treatment agents (L1 to L18) were prepared by mixing Z-6062 Silane (manufactured by DOW) with a solvent (toluene), adding an acid catalyst (17.4M acetic acid), and stirring for 10 or 60 minutes. Table 1 shows the amounts of fluorine-containing compound, modified polyolefin resin, silane coupling agent, solvent, and acid catalyst used in each surface treatment agent.

[0067] [Table 1]

[0068] [Manufacturing Example 2] Manufacturing Example of Surface-Treated Rubber Sheet Square-shaped rubber sheets measuring 2 cm on each side (silicone rubber sheet (Q), acrylonitrile butadiene rubber sheet (NBR), ethylene propylene diene rubber sheet (EP), and fluororubber sheet (FKM)) were prepared. Each rubber sheet was immersed for 3 minutes in the surface treatment agent (L1 to L18) prepared in Production Example 1 to form a surface treatment layer. The rubber sheets with the surface treatment layer formed (samples 1 to 18) were fired at 150°C for 10 minutes.

[0069] [Example Exam 1] TAC Exam Rubber sheets of samples 1 to 18 were mounted on a probe tack test apparatus (product name: Tacking Tester TAC-II, manufactured by Resca Co., Ltd.). A load of 100 gf was applied to the surface treatment layer of the rubber sheet, and the probe (a cylindrical probe made of stainless steel (diameter: 5.1 mm)) was brought into contact with it for 3 seconds. Then, the probe was peeled off at a speed of 600 mm / min perpendicular to the surface of the test piece, and the force required for peeling (adhesion force, gf) was measured. The results are shown in Table 2. Similarly, when the adhesive strength was measured for silicone rubber sheets (Q), acrylonitrile butadiene rubber sheets (NBR), ethylene propylene diene rubber sheets (EP), and fluororubber sheets (FKM) without a surface treatment layer, the adhesive strength of the silicone rubber sheet (Q) was 194.7 gf, the adhesive strength of the acrylonitrile butadiene rubber sheet (NBR) was 285.7 gf, the adhesive strength of the ethylene propylene diene rubber sheet (EPDM) was 486.5 gf, and the adhesive strength of the fluororubber sheet (FKM) was 387.5 gf.

[0070] [Test Example 2] Followability Test A conformability test was conducted on rubber sheets 1 to 18. This test involved visually inspecting or using a scanning electron microscope (SEM) to determine whether cracks occurred in the surface treatment layer of the rubber sheet while stretching it in one direction to 25% and 50% of its area. The results are shown in Table 2. The conformability was evaluated as follows: "○" if no cracks occurred in the surface treatment layer by 50% stretching, "△" if cracks occurred in the surface treatment layer by 50% stretching, and "×" if cracks occurred in the surface treatment layer by 25% stretching.

[0071] [Table 2]

[0072] As shown in Table 2, the rubber sheets of samples 1-13 and 15-16 exhibited excellent non-stick properties when their elastomer (rubber) surface was treated with a surface treatment agent containing the above-mentioned fluorine-containing compound, modified polyolefin resin, silane coupling agent, and acid catalyst. However, non-stick properties could not be imparted to the fluororubber sheet (FKM) of sample 14, the fluororubber sheet (FKM) of sample 17, and the silicone rubber sheet (Q) of sample 18.

[0073] Furthermore, it was confirmed that the rubber sheets of sample 13 and sample 16 exhibited good conformability to the expansion and contraction of the rubber sheets. From these results, it can be inferred that a surface treatment layer with good conformability can be formed by increasing the stirring time (reaction time). It is inferred that when 3-aminopropyltrimethoxysilane (APTMS) was used as the silane coupling agent, a hard and brittle coating layer was formed on the surface, making it prone to cracking when the rubber sheet was expanded and contracted, and thus unable to provide sufficient conformability.

Claims

1. It contains a fluorine-containing compound represented by the following formula (1), a modified polyolefin resin, a silane coupling agent, and an acid catalyst. A surface treatment agent characterized in that the modified polyolefin resin is an acid-modified polyolefin resin. 【Chemistry 1】 In formula (1) above, R1 represents a group containing a fluoroalkyl group, R2 represents an alkyl group or an alkoxyalkyl group, R3 and R4 each independently represent a hydrogen atom or a monovalent organic group, x is an integer from 1 to 100, and y is an integer from 0 to 100.

2. The surface treatment agent according to claim 1, characterized in that the silane coupling agent comprises 3-mercaptopropyltrimethoxysilane and / or tetraethoxysilane.

3. The surface treatment agent according to claim 1 or 2, characterized in that the acid catalyst is an organic acid.

4. The surface treatment agent according to claim 1 or 2, characterized in that the acid catalyst is acetic acid.

5. The surface treatment agent according to claim 1 or 2, characterized in that y is 0 in formula (1).

6. The surface treatment agent according to claim 1 or 2, characterized in that the group containing the fluoroalkyl group represented by R1 in formula (1) is a group represented by the following formula (2). 【Chemistry 2】 In equation (2) above, p is an integer between 0 and 2.

7. The surface treatment agent according to claim 1 or 2, characterized in that R2 in formula (1) is a methyl group.

8. The surface treatment agent according to claim 1 or 2, characterized in that x is an integer from 1 to 10 in formula (1).

9. The surface treatment agent according to claim 1 or 2, characterized in that it is used for surface treatment of elastomer surfaces.

10. A method for producing a surface treatment agent according to claim 1 or 2, A method for producing a surface treatment agent, characterized by comprising the step of stirring the fluorine-containing compound, the modified polyolefin resin, and the silane coupling agent for 10 minutes or more in the presence of the acid catalyst.

11. A base having an elastomer surface, A surface treatment layer covering at least a portion of the elastomer surface of the base and Equipped with, The surface treatment layer comprises at least a fluorine-containing compound represented by the following formula (1), a modified polyolefin resin, and a silane coupling agent. The modified polyolefin resin is characterized in that it is an acid-modified polyolefin resin. 【Transformation 3】 In formula (1) above, R1 represents a group containing a fluoroalkyl group, R2 represents an alkyl group or an alkoxyalkyl group, R3 and R4 each independently represent a hydrogen atom or a monovalent organic group, x is an integer from 1 to 100, and y is an integer from 0 to 100.

12. A surface treatment method for performing surface treatment on a substrate to be treated using the surface treatment agent described in claim 1 or 2, A surface treatment method characterized by including the step of immersing the substrate to be treated in the surface treatment agent to form a surface treatment layer on the surface of the substrate to be treated.

13. The surface treatment method according to claim 12, characterized in that the substrate to be treated is immersed in the surface treatment agent for three minutes or more.

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