JPH0472859B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a thermosetting resin composition having excellent abrasion resistance and suitable for use as a protective lining material.

(Prior art) Thermosetting resins such as polyurethane resins and epoxy resins have traditionally been used in factories due to their excellent physical properties.
It is used as flooring material for offices, etc., road surface material for pedestrian walkways, etc., and protective lining material for crushed stone plants, etc., but in these applications, the reason why re-installation is required is often damage due to wear. There is an overwhelming desire to improve wear resistance and continue to exhibit performance for as long as possible.

By the way, it is known that silicone oil, fluororesin, etc. are blended into thermosetting resins in order to improve wear resistance, as described in Japanese Patent Publication No. 13002/1982 and Japanese Patent Application Laid-open No. 107341/1989.

However, these known methods are for the resin material from which the molded product is obtained, and require a subsequent molding process, and are made using polyurethane resin or epoxy resin containing a curing agent and curing at room temperature, which is applied to the protective lining material. Not suitable for direct application.

(Problems to be Solved by the Invention) In order to address the above-mentioned circumstances, the present inventors conducted intensive studies to improve the abrasion resistance of conventional thermosetting resins as lining agents, and as a result, found that It was discovered that abrasion resistance could be improved by mixing a required amount of fluororesin or silicone resin-encapsulated microcapsules into a thermosetting resin selected from polyurethane resins and epoxy resins, and this led to the completion of the present invention. Ivy.

Of course, it is well known that oil is encapsulated in microcapsules and mixed with resin, as described in Japanese Patent Publication No. 48-43374. Conventionally, such mixtures are used for molding bearings, etc. This is an oil-impregnated plastic molded article in which oil particles exist in the form of independent cells, and is not applicable to the lining material of the present invention.

That is, the present invention particularly provides a thermosetting resin composition as a protective lining material by mixing the thermosetting resin and the resin-encapsulated microcapsules, thereby significantly improving the abrasion resistance of the conventional protective lining layer. The purpose is to

(Means for Solving the Problems) The present invention, which satisfies the above objects, consists of (a) at least one thermosetting resin selected from the group consisting of room temperature curable polyurethane resins and epoxy resins; b) A composition containing microcapsules containing at least one selected from the group consisting of fluororesins and silicone resins, the thermosetting resin having a microcapsule content of 1 to 60% by weight. A composition is provided.

As the thermosetting resin in the present invention, any known thermosetting resin can be used as appropriate, but room temperature curable polyurethane resins or epoxy resins are particularly preferred from the viewpoint of speed of construction and physical properties.

Also, known fluororesins and silicone resins to be encapsulated in microcapsules are used, but these are preferably grease-like at room temperature.

Note that microencapsulation can be easily performed by any known method.

The thermosetting resin composition of the present invention can be obtained by sufficiently mixing the above-mentioned thermosetting resin and microcapsules, but it is important that the content of microcapsules in the composition is 1 to 60% by weight. It is. In this case, if the amount of microcapsules contained is less than 1% by weight, sufficient wear resistance cannot be obtained, and if it exceeds 60% by weight, the tensile strength, tear strength, etc. of the cured product may deteriorate. This is not preferred because the physical properties deteriorate.

The thermosetting resin composition of the present invention may contain additives such as pigments such as titanium oxide, fillers such as clay, antifoaming agents, antioxidants, dispersion stabilizers, anti-sag agents, etc., as necessary. Can be added.

(Function) According to the composition of the present invention, when it is used as the protective lining material, etc., the abrasion resistance of the cured thermosetting resin lining material is significantly improved, and in addition, the workability is also improved.

(Example) Hereinafter, the present invention will be explained with reference to Examples. In the example,
Parts represent parts by weight.

Example 1 Microcapsules containing polydimethylsiloxane having a kinematic viscosity of 50 cSt (centistokes) at room temperature in 100 parts by weight of Sumikadyne F310 (curing agent-containing polyurethane resin composition, Sumitomo Chemical Co., Ltd.) (Matsumoto Yushi Co., Ltd.) 20 parts by weight were added and thoroughly mixed with a stirring rod to obtain a composition, which was poured onto a glass plate coated with a mold release agent in advance and cast into a sheet with a thickness of 2 mm. After curing at room temperature for 7 days, load 1Kg,
A Taber type wear resistance test was conducted under the condition of 1000 rotations. As a result, the weight loss on the worn wheel H22 is 40
It was mg.

Comparative Example 1 In an experiment conducted as in Example 1 without the addition of microcapsules, the weight loss was 110 mg.

Example 2 Toko S-Epo #500 (epoxy resin composition containing a curing agent, manufactured by Toko Asphalt Co., Ltd.)
To 100 parts by weight, 40 parts by weight of microcapsules containing polydimethylsiloxane (Matsumoto Yushi Co., Ltd.) containing 10,000 cSt at room temperature were added and thoroughly mixed with a stirring rod to obtain a composition. It was poured onto a coated glass plate and cast into a 2 mm thick sheet. After standing for 3 days, the resulting sheet was subjected to an abrasion test in the same manner as in Example 1, and the weight loss due to abrasion was 30 mg.

Comparative Example 2 In Example 2, an abrasion test was conducted without adding microcapsules, and as a result, the weight loss due to abrasion was 130 mg.

(Curing of the Invention) As described above, the thermosetting resin composition of the present invention includes microcapsules containing at least one selected from the group consisting of fluorocarbon resins and silicone resins, which are made of polyurethane resin or epoxy resin. It is made by mixing a predetermined amount of a thermosetting resin, and has significantly improved abrasion resistance compared to the thermosetting resin conventionally used for protective lining materials, greatly reducing damage caused by abrasion and improving performance. can be maintained for a long period of time, and since it is encapsulated in microcapsules and mixed, it is easy to mix with the thermosetting resin, and workability can be significantly improved during protective lining work.

Claims (1)

[Claims] 1. (a) at least one thermosetting resin selected from the group consisting of room temperature curable polyurethane resins and epoxy resins; and (b) at least one thermosetting resin selected from the group consisting of fluororesins and silicone resins. 1. A thermosetting resin composition for a lining material, the composition containing microcapsules, wherein the content of the microcapsules is 1 to 60% by weight.