JPH041258A - Binder composition - Google Patents

Abstract

PURPOSE:To obtain a binder compsn. excellent in the resistance to low-temp. embrittlement, elongation, and the adhesion to an aggregate and useful for a colored pavement by compounding a petroleum resin, an arom. heavy mineral oil, a thermoplastic elastomer, and a specific liq. maleinized org. compd. CONSTITUTION:A petroleum resin (e.g. an arom. petroleum resin or coumarone- indene resin having a mol.wt. of 500-3000), an arom. heavy mineral oil (pref. having a flash point of 260 deg.C, a kinematic viscosity at 40 deg.C of 200cSt or higher, and an arom. content of 50wt.% or higher), a thermoplastic elastomer (e.g. a styrene-butadiene block copolymer), and a liq. maleinized org. compd. having an average mol.wt. of 300-10000 and an acid value of 10-200 (e.g. a maleinized compd. of a liq. polybutadiene) are compounded to give a resin compsn. for a colored pavement. The compsn. is excellent in the resistance to low-temp. embrittlement, elongation, and the adhesion to an aggregate, and a pavement mixture contg. the compsn. has a high compressive strength, which is not remarkably degraded even in the presence of water.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is used for pavements such as sidewalks, promenades, roadways, and other pavements, and can be applied in yellow, red, blue, or any other color. The present invention relates to a binder composition which is useful for producing paving materials that can be colored and which has particularly excellent durability.

[Prior art and problems to be solved by the invention] JP-A-61-97369 has already disclosed a composition in which a petroleum resin, an aromatic mineral oil, and a styrene/conjugated diene type block copolymer are mixed as a binder composition for color pavement. providing.

The light hue of these binder compositions allows them to be colored by the addition of colored aggregates, pigments, and dyes, which are then mixed with road paving aggregates and commonly mixed with paving asphalt mixtures. Paving material mixtures of similar quality are obtained.

Ordinary asphalt contains several percent of oxygen-containing compounds, and these oxygen-containing compounds cause
A strengthening effect of the affinity between the asphalt and the aggregate surface occurs, making it possible to produce asphalt pavement mixtures with high compressive strength and great durability. However, it has been pointed out that the adhesion of conventional color paving binders to aggregates is not sufficient, and that the strength of the binder mixture is significantly reduced, especially when water is present.

There has been a strong desire for a color pavement binder with high compressive strength and durability.

The inventors continued their intensive research in order to solve the above-mentioned problems with existing binder compositions for color pavement.
As a result of repeated experiments, the composition was identified, and it was found that the low-temperature brittleness and elongation of the composition were improved, the adhesion to aggregate was improved, and furthermore, the paving material mixed with the binder was The present invention was completed based on the discovery that the compressive strength of

An object of the present invention is to provide a binder composition that has a specific composition and has high compressive strength and durability.

[Means for Solving the Problems] This invention provides petroleum resin, aromatic heavy mineral oil, thermoplastic elastomer, and an average molecular weight of 300 to 10,000.
The present invention provides a binder composition containing as an essential component a liquid maleated organic compound having an acid value within the range of 10 to 200.

The contents of this invention will be explained in more detail below.

The petroleum resin used in this invention has a boiling point in the range of 140 to 240°C, and is either a petroleum fraction mainly consisting of C9 aromatic vinyl compounds and/or a coal fraction, or it is added with phenol, Aromatic petroleum resins with molecular weights in the range of 500 to 3,000 and coumaron-indene resins obtained by adding phenols such as catechol, resorcinol, and hydroquinone and polymerizing them using a Friedel-Crauff type catalyst; - Shipping (R in the formula is an alkyl group having 1 to 3 carbon atoms, n. 0 to 6
), a five-membered ring compound with a conjugated double bond,
and/or its Diels-Alder adduct, or by homopolymerizing the above compound 1 (10 parts by weight and 2 to 200 parts by weight of one or more selected from -hydric phenols, polyhydric phenols, and alkyl substituted products thereof). Examples include cyclopentadiene resin obtained by copolymerizing with and terpene resin having a molecular weight within the range of 500 to 3.000 obtained from turpentine oil.

Also included are aliphatic resins obtained by hydrogenating these petroleum resins.

Among these, preferable ones have a softening point of 80 to 1
It is an aromatic petroleum resin with a temperature of 80°C and a flash point of 240°C or higher. In this petroleum resin, aromatic petroleum fractions include petroleum fractions such as naphtha, kerosene, and light oil that have a boiling point within the range of 140 to 240°C when subjected to thermal decomposition such as steam cracking. Usually, after polymerization, the catalyst is further decomposed with an alkali, and then unreacted oil and low polymers are separated and removed to refine the petroleum oil suitable for this invention. Used as a resin.

The aromatic heavy mineral oil in this invention has a flash point of 240
℃ or higher, preferably 260℃ or higher, and a kinematic viscosity of 500 cSt or higher, preferably 2000 cS at 40℃.
t or more and has an aromatic content of 40 wt.% or more, preferably 50 wt.% or more. The aromatic content here is based on the Japan Petroleum Institute standard r JPI-55-22-
83" test method.

Particularly preferred as the aromatic heavy mineral oil is the extract of bright stock obtained from the solvent extraction process of petroleum refining. Note that the solvent used in this solvent extraction step includes phenol, N-methylpyrrolidone, liquid sulfur dioxide, furfural, etc., and furfural is particularly preferred.

The thermoplastic elastomer for this invention is usually a block copolymer of styrene and a conjugated diene, or a partially hydrogenated product thereof.

Here, the conjugated diene includes butadiene, isoprene, and the like.

Preferably, the terminal end is a polystyrene block,
There is a polybutadiene block in the middle, and the proportion of polystyrene is within the range of about 15 to 30 wt.%.

The liquid maleated organic compound in this invention is an addition reaction product of maleic anhydride or its derivative and various liquid organic compounds, and has an average molecular weight of 300 to 10,0
00, preferably within the range of 500 to 5.000.

If the average molecular weight is smaller than the lower limit of this range, the flash point of the binder composition will be low, which is not preferred from the viewpoint of safety.

On the other hand, when the average molecular weight is larger than the upper limit of this range, the softening point becomes high and handling becomes difficult, which is not preferable.

The acid value of the liquid maleated organic compound is 10-200, preferably 40-80. If the acid value is lower than the lower limit of this range, the effect of adding the liquid maleated organic compound to the composition will not be sufficient and a large amount will need to be added, which is not preferable.

On the other hand, if the acid value is higher than the upper limit of this range, the compatibility with petroleum resins or aromatic heavy mineral oils will decrease, which is not preferable because there is a risk of separation during heated storage.

The liquid compounds mentioned above include polybutadiene, polybutene,
Low molecular weight liquid polymers such as poly, chlorobrene, and polyisoprene; CIl+ unsaturated monocarboxylic acids such as oleic acid, linoleic acid, and lyluic acid; or polymers of each of these monocarboxylic acids; vegetable drying oils, e.g. It is a polymer of linseed oil, tung oil, eno oil, soybean oil, or each of these vegetable drying oils.

Among these, particularly preferred are liquid polybutadiene, liquid polybutene, and linseed oil.

In this invention, the content of each component is not particularly strictly limited, but usually the petroleum resin is in the range of 20 to 50 wt.%, preferably 25 to 40 wt.%, and the aromatic heavy mineral oil is in the range of 77 to 50 wt.%. 34 wt,%, preferably 68-50
wt.%, the thermoplastic elastomer is within the range of 2 to 8 wt.%, preferably 5 to 7 wt.%, and the liquid maleated organic compound is within the range of 1 to 6 wt.%.
,%, preferably within the range of 2 to 3 wt.%.

Further, the binder composition of the present invention is normally contained within the range of 3 to 15 wt.%, preferably 4 to 8 wt.%, based on the total amount of the paving binder mixture.

In addition to the paving aggregate, the binder composition of the present invention includes:
Various pigments such as yellow lead and ultramarine are used in amounts of, for example, 2 to 5
By blending wt.%, a color paving mixture with a vivid tone can be produced.

The binder may also contain other commonly used components such as ethylene-acrylic acid ester copolymer, ethylene-vinyl acetate copolymer, and the like.

The binder composition of the present invention is particularly useful for road paving, especially as a color paving material, but it is also suitable for use in fields such as roof ink, sealing, painting, and waterproofing. is possible.

〔Effect of the invention〕

The binder composition for colored pavement of the present invention is excellent in low-temperature brittleness and elongation, and in addition, it has very good adhesion to aggregate.

Furthermore, a pavement mixture using this binder composition also has a very important feature that its compressive strength is high, and the decrease in compressive strength is not noticeable even in the presence of moisture.

C Examples] The invention will be described in detail below with reference to Examples, but the invention should not be limited in any way by these Examples.

Examples 1 to 4/Comparative Examples 1 and 2 The following petroleum resin, aromatic heavy mineral oil, thermoplastic elastomer, and liquid maleated organic compound were mixed in the following manner to produce a binder composition for color pavement. was prepared.

That is, an appropriate amount of aromatic heavy mineral oil and a thermoplastic elastomer are kneaded at a temperature of 200 to 220°C,
After the thermoplastic elastomer is completely dissolved in the aromatic heavy mineral oil, additional aromatic heavy mineral oil is added, followed by the petroleum resin and liquid maleated organic compound for about 1 hour. A binder composition was produced by stirring and mixing at a temperature of -190°C.

petroleum resin Aromatic heavy mineral oil thermoplastic elastomer Specific gravity (ASTM D297) Ll,! 11.5 Liquid maleated organic compound Table 1 shows the properties of the obtained binder.

The penetration degree of the binder composition for color pavement shown in Table 1 is 60.
/ 80, but by changing these compositions, the penetration is 80/100, 40/60 (JIS classification) and modified asphalt type I ( It is possible to produce grade binder compositions such as Japan Road Association Quality Standards).

The binder compositions of Examples 1 and 2 have improved elongation and Fraas embrittlement point compared to those of Comparative Example 1.
Similarly, the binder composition of Example 3 is superior to that of Comparative Example 2.

The binder compositions of these Examples 1 to 4 were 60/
The quality is comparable to that of 80 straight asphalt.

Table-I (Unit of compounding ratio: Needle %) Note) All binder property tests are based on JIS 2207.
I followed.

Examples 5 to 8, Comparative Examples 3 and 4 The binder mixtures of Examples 1 to 4 and Comparative Examples 1 and 2 were subjected to a Marshall stability test to evaluate the influence of the presence of water on compressive strength.

The results are shown in Table 2.

The method of manufacturing these binder mixtures and the Marshall water immersion stability test method are as follows.

This test was conducted in "Pavement Test Method Handbook J (1988 Maruzen) 5
The method described on page 06 was followed.

The conditions for preparing the test specimens were as follows.

As raw materials, 6-bone frame stone 44wt,%, 7-bone framestone 15w
t,%, coarse sand 15 wt,%, fine sand 20 wt,%,
A dense particle size mixture consisting of filler 3 wt.%, yellow lead 5R 3 wt.% was used.

The mixing temperature was within the range of 150 to 155°C, the compaction temperature was within the range of 135 to 140°C, the number of compactions was 50 times on each side, and the binder amount was 5.9%.

The Marshall stability test specimen obtained under the above preparation conditions was immersed in water in a constant temperature water bath maintained at 60°C for 7 days, and then its Marshall stability was measured using the following formula: Stability was calculated.

Residual stability (%) = (+00) [Water immersion Marshall stability (kg) / Marshall stability (kg)] This binder mixture has an orange color and is of a quality that can be used for colored pavement. Ta.

The binder mixtures of Examples 5 to 8 have a high Marshall stability of 1000 kg or more, the degree of decrease in Marshall stability after immersion in water is small, and the residual stability is high at 70% or more. , excellent performance was shown.

The test results demonstrated the excellent durability of the binder of the present invention in practical use.

On the other hand, Comparative Examples 3 and 4 have Marshall stability.
Less than 1000 kg, residual stability is 30-40%
However, the quality of the side sole was not suitable for practical use in road paving.

Table-2 To E1,

Claims (1)

[Claims] 1. A petroleum resin, an aromatic heavy mineral oil, a thermoplastic elastomer, and a liquid maleated organic compound having an average molecular weight within the range of 300 to 10,000 and an acid value within the range of 10 to 200. A binder composition containing. 2 Petroleum resin content is 20 to 50 wt. %, the content of aromatic heavy mineral oil is 77 to 34 wt. %, the content of thermoplastic elastomer is 2 to 8 wt. %, and the content of liquid maleated organic compounds is 1
~6wt. %. 3. The composition according to claim 1 or 2, wherein the aromatic heavy mineral oil is a bright stock furfural extract. 4. The composition according to any one of claims 1 to 3, wherein the liquid maleated organic compound is a maleated product of one or more compounds selected from the group consisting of liquid polybutadiene, liquid polybutene, vegetable drying oil, or a polymer thereof. thing.