JP2001240616A - Olefinic polymer, hot-melt composition using the same olefinic polymer and moistureproof paper using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a new polyolefin-based polymer utilizable for an adhesive, a hot-melt composition, a water-dispersible hot-melt composition or a moistureproof paper and excellent in fluidity and temperature characteristics and the adhesive, hot-melt composition and the recyclable moistureproof paper using the polyolefin-based polymer. SOLUTION: This polyolefin-based polymer is obtained by the following (X treatment) and/or (Y treatment). (X treatment): a mixture comprising an amorphous polyolefin and a random polypropylene is treated with a free radical generator capable of generating radicals within a specific range and (Y treatment) a mixture comprising the amorphous polyolefin and random polypropylene is treated with the free radical generator capable of generating radicals within a specific range and 0.0005-1 mol of an acid anhydride. The hot-melt adhesive and moistureproof paper comprise the polyolefin-based polymer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a novel olefin polymer having excellent fluidity and excellent temperature characteristics which can be used for adhesives, hot melt compositions, water-dispersible hot melt compositions and moisture-proof papers. The present invention relates to an adhesive, a hot melt composition and a recyclable moisture-proof paper using the olefin polymer.

[0002]

2. Description of the Related Art JP-A-9-316252 discloses an atactic polypropylene and / or amorphous polyalphaolefin as a first component, a wax as a second component, and a tackifier as a third component. And the compounding amount of the wax as the second component is 10 to 10.
A hot melt composition characterized by being 60% by weight and having the same blending ratio of the first component and the third component, or the first component being superior, and a moisture-proof paper using the same are disclosed. .

JP-A-11-158330 discloses the following components (A) to (E) [(A), (B), (C),
(D), (E) a total of 100 parts by weight], a water-dispersible hot melt composition: (A) 40 to 55 parts by weight of an amorphous polyalphaolefin,
(B) 10 to 25 parts by weight of a tackifier, (C) wax 2
0 to 35 parts by weight, (D) polypropylene oligomer 2
10 parts by weight, (E) 1 to 7 parts by weight of the compatibilizer [(A),
(B), (C), (D), and (E) in total of 100 parts by weight], and a water-dispersible hot melt composition and a moisture-proof paper using the same.

[0004]

SUMMARY OF THE INVENTION A composition containing an amorphous polyolefin and a random polypropylene has excellent dispersibility, excellent heat resistance, excellent fluidity, excellent workability,
An object of the present invention is to provide an olefin-based polymer which can be used for an adhesive, a hot-melt composition and a recyclable moisture-proof paper which are excellent in handleability. In general, water-dispersible hot-melt compositions mainly composed of amorphous polyolefin and atactic polypropylene for the purpose of recycling to waste paper as moisture-proof papers have improved heat resistance and water dispersibility during recovery. Further improvement is required. Therefore, an object of the present invention is to provide an adhesive, a hot-melt composition and a moisture-proof paper which use this olefin-based polymer and have excellent heat resistance and excellent water dispersibility at the time of recovery.

[0005]

Means for Solving the Problems The present invention relates to an olefin polymer obtained by the following (X treatment) and / or (Y treatment). (X treatment) Radical 0.0 per 100 parts by weight of a mixture containing amorphous polyolefin and random polypropylene
It is treated with a radical generator that generates from 0031 mol to 0.0062 mol. (Y treatment) Radical 0.0 per 100 parts by weight of a mixture containing amorphous polyolefin and random polypropylene
The treatment is carried out with 0.0005 mol to 1 mol of a radical generator and an acid anhydride to generate 0031 mol to 0.0062 mol.

Further, according to the present invention, the olefin polymer has a melt viscosity at 230 ° C. of 3 Pa · S to 100 Pa.
It relates to an olefin-based polymer characterized by being S.

Further, the present invention relates to (A1) 15 to 75 parts by weight of an olefin polymer obtained by the (X treatment), (B) 0 to 35 parts by weight of a tackifier, and (C) 0 to 35 parts by weight of a wax. And (D) a hot melt composition containing 100 parts by weight of 1 to 15 parts by weight of a compatibilizer.

Further, the present invention provides (A2) 15 to 75 parts by weight of an olefin polymer obtained by the (Y treatment), (B) 0 to 35 parts by weight of a tackifier, and (C) 0 to 35 parts by weight of a wax. And (D) a hot melt composition containing 100 parts by weight of 0 to 15 parts by weight of a compatibilizer.

Further, the present invention relates to a moisture-proof paper comprising the above-mentioned hot melt composition and a paper substrate.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention provides the following (X treatment) and / or
Or an olefin-based polymer obtained by (Y treatment). (Treatment X) Radicals per 100 parts by weight of a mixture containing amorphous polyolefin and random polypropylene
000031 mol, preferably 0.0005 mol, more preferably 0.000625 mol, particularly preferably 0.
000093 mol to 0.0063 mol, preferably 0.1 mol.
Treatment with a radical generator that produces 005 moles, more preferably 0.0044 moles, and particularly preferably 0.0032 moles. (Y-treatment) Radicals per 100 parts by weight of a mixture containing an amorphous polyolefin and a random polypropylene are considered to be 0.
000031 moles, more 0.0005 moles, more
000625 mol, in particular from 0.00093 mol to 0.0
0625 mol, further 0.005 mol, further 0.00
0.0005 mol of a radical generator and an acid anhydride for producing 44 mol, especially 0.0032 mol, and further 0.001 mol
Mol, more preferably 0.002 mol, especially 0.003 mol to 1 mol
The treatment is carried out with an additional 0.5 mol, an additional 0.1 mol, an additional 0.05 mol, in particular 0.03 mol.

In the (X treatment) and / or (Y treatment), the mixture containing the amorphous polyolefin and the random polypropylene contains 20% by weight of the amorphous polyolefin,
Preference is given in particular to mixtures comprising 30% to 70% by weight, more particularly 65% by weight, in particular 60% by weight, and 80% by weight of random polypropylene, in particular 70% to 30% by weight, furthermore 35% by weight, especially 40% by weight.

As the radical generator, any substance can be used as long as it generates a radical and further generates a radical by heat. Examples of the radical generator include organic peroxides and azo compounds that generate active oxygen. Specific examples of the organic peroxide include dicumyl peroxide, di-t-butyl peroxide, 2,5-dimethyl-2,5-bis (t-butylperoxy) hexane, and 2,5-dimethyl. -2,5-bis (t-butylperoxy) hexyne-
3,1,3-bis (t-butylperoxyisopropyl) benzene, 1,1-bis (t-butylperoxy)
Balalate, benzoyl peroxide, t-butylperoxybenzoate, acetyl peroxide, isobutyryl peroxide, octanoyl peroxide, decanoyl peroxide, lauroyl peroxide, 3,5,5-trimethylhexanoyl peroxide, 2, 4-dichlorobenzoyl peroxide, m
-Toluyl peroxide and the like.
Examples of the azo compound include azoisobutyronitrile and dimethylazoisobutyronitrile.

In the present invention, when the radical generator is an organic peroxide, an olefin polymer obtained by the following (X treatment) and / or (Y treatment) is preferred. (X treatment) The active oxygen content per 100 parts by weight of the mixture containing the amorphous polyolefin and the random polypropylene is 0.00031 mol, further 0.0005 mol, further 0.000625 mol, particularly 0.00093 mol to 0.00625 mol, The treatment is carried out with a radical generator generating an additional 0.005 mol, more preferably 0.0044 mol, especially 0.0032 mol. (Y treatment) The active oxygen content per 100 parts by weight of the mixture containing the amorphous polyolefin and the random polypropylene is 0.00031 mol, further 0.0005 mol, further 0.000625 mol, particularly 0.00093 mol to 0.00625 mol, 0.0005 mol, more preferably 0.0044 mol, especially 0.0005 mol, of the radical generator and acid anhydride generating 0.0032 mol, further 0.001 mol, further 0.002 mol, especially 0.002 mol
The treatment is carried out in the range from 3 mol to 1 mol, further 0.5 mol, further 0.1 mol, further 0.05 mol, especially 0.03 mol.

In the (X treatment), a mixture containing an amorphous polyolefin and a random polypropylene is treated with a radical generator such as active oxygen, so that the mixture is excellent in heat resistance and fluidity, and is used in a hot melt adhesive. A composition having excellent properties can be obtained.

In the (Y treatment), a mixture containing an amorphous polyolefin and a random polypropylene is treated with a radical generator such as active oxygen and an acid anhydride, whereby heat resistance, fluidity, and adhesiveness are excellent. A composition having excellent compatibility with other polymer components and excellent processability when used in a hot melt adhesive can be obtained.

The amount of active oxygen can be calculated from the formula (1) when the radical activator is an organic peroxide.

(Equation 1)

The molecular weight distribution (Mw) of the olefin polymer
/ Mn) preferably has a property in the range of 4, more preferably 4.5, especially 5 to 25, further 20, more preferably 15, especially 14.

The melt viscosity of the olefin polymer at 230 ° C. is 3 Pa · S, more preferably 5 Pa · S, especially 8 Pa · S.
S to 100 Pa · S, 80 Pa · S, 6
It is preferable to have a property in the range of 0 Pa · S, particularly 30 Pa · S, because it has excellent fluidity, coatability, workability, handleability, and the like.

The radical generator can be used as it is in the form of a mixture with an amorphous polyolefin and a random polypropylene. Alternatively, the radical generator can be used by dissolving it in a small amount of an organic solvent. As the organic solvent used here, any organic solvent that can dissolve the radical generator can be used without particular limitation. Such organic solvents include aromatic hydrocarbon solvents such as benzene, toluene and xylene; pentane,
Aliphatic hydrocarbon solvents such as hexane, heptane, octane, nonane and decane; alicyclic hydrocarbon solvents such as cyclohexane, methylcyclohexane and decahydronaphthalene; chlorobenzene, dichlorobenzene, trichlorobenzene, methylene chloride, Chlorinated hydrocarbons such as chloroform, carbon tetrachloride and tetrachloroethylene; methanol, ethanol, n-propynol, iso-propanol, n-butanol, sec-
Alcohol solvents such as butanol and tert-butanol; ketone solvents such as acetone, methyl ethyl ketone and methyl isobutyl ketone; ester solvents such as ethyl acetate and dimethyl phthalate; dimethyl ether, diethyl ether, di-n-amyl ether, tetrahydrofuran and dihydrofuran An ether-based solvent such as oxyanisole can be used.

In the present invention, an amorphous polyolefin,
In treating the random polypropylene and the acid anhydride, a reducing substance may be used. The reducing substance has an effect of improving the graft amount in the obtained olefin polymer modified with the acid anhydride.

Examples of the reducing substance include iron (II) ion, chromium ion, cobalt ion, nickel ion, palladium ion, sulfite, hydroxylamine, hydrazine, etc., as well as -SH, SO ₃ H, -NHNH ₂ ,- CO
Compounds containing a group such as CH (OH)-are exemplified. Specific examples of such a reducing substance include ferrous chloride, potassium dichromate, cobalt chloride, cobalt naphthenate, palladium chloride, ethanolamine, diethanolamine, N, N-dimethylaniline, hydrazine,
Ethyl mercaptan, benzenesulfonic acid, p-toluenesulfonic acid and the like can be mentioned. Such a reducing substance is usually 0.001 part by weight, based on 100 parts by weight of amorphous polyolefin and random polypropylene and further based on 100 parts by weight of random polypropylene and acid anhydride. 0.01 parts by weight, especially 0.1 to 5 parts by weight, further 3 parts by weight,
It is particularly preferred to use it in an amount of 1 part by weight.

Method of treating amorphous polyolefin and random polypropylene with a radical generator (X treatment)
And / or a method of treating an amorphous polyolefin, random polypropylene, a radical generator and an acid anhydride (Y treatment), for example, dissolving the amorphous polyolefin and the random polypropylene in an organic solvent, and then dissolving the acid anhydride And a radical generator are added to the solution at a temperature of 70 ° C., further 80 ° C., especially 90 ° C. to 250 ° C., further 200 ° C., especially 190 ° C., for 0.05 hour, 0.1 hour, The reaction is preferably carried out for a period of time, more preferably 1 hour, especially 2 hours to 20 hours, further 15 hours, especially 10 hours.

When the amorphous polyolefin and the random polypropylene are treated, any organic solvent can be used without particular limitation as long as it can dissolve both the amorphous polyolefin and the random polypropylene. Examples of the organic solvent include aromatic hydrocarbon solvents such as benzene, toluene, and xylene, and aliphatic hydrocarbon solvents such as pentane, hexane, and heptane.

Further, a method of treating an amorphous polyolefin and a random polypropylene with a radical generator and / or a method of treating an amorphous polyolefin, a random polypropylene, a radical generator and an acid anhydride include various heating methods. Using equipment that can be kneaded, such as possible mixers and extruders, and that can be further melt-kneaded, without solvent,
Alternatively, it can be produced by reacting an amorphous polyolefin and a random polypropylene or an amorphous polyolefin and a random polypropylene with an acid anhydride or a radical generator in a state containing a liquid or a solvent. The reaction temperature is usually equal to or higher than the melting points of amorphous polyolefin and random polypropylene, specifically, 160 ° C.
C., preferably from 180.degree. C. to 280.degree. C., more preferably 260.degree. C., especially 250.degree. The reaction time under such a temperature condition is usually 0.1 minute, more preferably 0.3 minute, particularly preferably 0.5 minute to 10 minutes, further preferably 8 minutes, particularly preferably 5 minutes.

As the amorphous polyolefin, an amorphous olefin polymer obtained by atactic polymerization of propylene alone using a predetermined catalyst, propylene and an α-olefin having 2 to 10 carbon atoms excluding propylene having a propylene content of Amorphous olefin-based polymer copolymerized so that each monomer unit is randomly arranged in a composition ratio of 30% by weight or more, further 35% by weight or more, further 40% by weight or more, particularly 51% by weight or more, and propylene and Ethylene, butene-1, hexene-1, 4-methylpentene
1, one or more olefins selected from octene-1 are randomly arranged at a composition ratio of propylene content of 30% by weight or more, further 35% by weight or more, further 40% by weight or more, particularly 51% by weight or more. Olefin-based polymer, particularly propylene and ethylene and / or butene-1 having a propylene content of 30% by weight or more, 35% by weight or more, further 40% by weight or more, especially 51% by weight Amorphous olefin-based polymers copolymerized so that each monomer unit is randomly arranged in the above composition ratio can be exemplified. For example,
A predetermined property can be appropriately selected and used from amorphous olefin-based polymers described in JP-B-6-89071 and those obtained by a production method.

The amorphous polyolefin has a number average molecular weight (Mn) of 1,000, more preferably 1500, especially 20
It is preferable to use those having a range of from 00 to 100,000, further 50,000, further 25,000, especially 20,000. As the amorphous polyolefin, BR
A using a viscometer DV-II manufactured by OOKFIELD
Those having a relatively low viscosity of 0.1 to 100 Pa · S at 190 ° C. measured according to STM D3236-73 are preferred.

Specific examples of the α-olefin having 2 to 10 carbon atoms excluding propylene in the amorphous polyolefin include ethylene, butene-1, pentene-1, and hexene-.
1, heptene-1, octene-1, nonene-1, decene-1, 4-methylpentene-1, 4-methylhexene-
Chain α-olefins such as 1,4,4-dimethylpentene-1 and cyclic α-olefins such as cyclopentene and cyclohexene
Olefins and the like. These α-olefins can be used alone or in appropriate combination of two or more kinds. Among these α-olefins, ethylene and / or
Or butene-1 is preferred.

Random polypropylene is JIS K7
The melt flow rate (MFR) measured at a temperature of 230 ° C. and a load of 21.18 N in accordance with No. 210 is 0.05
(G / 10 min), further 0.1 (g / 10 min), especially 0.3 (g / 10 min) to 15 (g / 10 min), further 10 (g / 10 min), further 7 (g) / 10 min), especially 5
(G / 10 minutes). Random polypropylene is ethylene and / or butene
1 content of 0.1% by weight, further 0.5% by weight, especially 1% by weight
20% by weight, more preferably 12% by weight, especially 8% by weight of propylene / ethylene random copolymer, propylene / butene-1 random copolymer, propylene / ethylene / butene-1 random copolymer, etc. Can be done.

The olefin polymer of the present invention contains amorphous polyolefin in an amount of 20% by weight, especially 30% by weight to 70% by weight.
%, Especially 65% by weight, especially 60% by weight, and random polypropylene by 80% by weight, especially 70% by weight to 3%.
After uniformly melting and kneading 0% by weight, further 35% by weight, especially 40% by weight with an extruder, adding a predetermined amount of a radical generator, and further kneading with an extruder to generate radicals to produce. Can be done. Of course, it is also possible to make uniform and lower the viscosity at the same time without taking two steps. By further adding an acid anhydride simultaneously with the radical generator,
An olefin polymer having excellent adhesion and compatibility can be produced.

The olefin polymer of the present invention has a breaking strength of at least 0.5 MPa, more preferably at least 1 MPa, particularly preferably at least 1.5 MPa, preferably at least 0.5 MPa, more preferably at least 1 MPa.
MPa, especially 1.5 MPa to 20 MPa, and even 19
More preferably, the range is 18 MPa.

The olefin polymer of the present invention may be used as a hot melt adhesive, a water-dispersible hot melt adhesive, a coating agent such as paper or moisture proof paper, a hot drink, a paper cup for separating cooked foods, and a coating material such as a plate. Agent.

The olefin-based polymer of the present invention can be used by adding a tackifier, a wax, and a compatibilizer for the purpose of improving the specific properties and the range in which the properties are not impaired.

When the olefin polymer of the present invention is used as a hot melt composition or a water-dispersible hot melt composition, the hot melt composition is preferably 15 parts by weight of the olefin polymer obtained by (A1) (X treatment), Is 2
0 parts by weight, more preferably 25 parts by weight, particularly preferably 40 parts by weight to 75 parts by weight, preferably 72 parts by weight,
More preferably in the range of 70 parts by weight, (B) 0 parts by weight of the tackifier, preferably 3 parts by weight, more preferably 8 parts by weight, particularly preferably 10 to 35 parts by weight, preferably 30 parts by weight, furthermore Preferably in the range of 25 parts by weight, (C) 0 parts by weight of wax, preferably 3 parts by weight, more preferably 8 parts by weight, particularly preferably 10 to 45 parts by weight, preferably 35 parts by weight, more preferably 25 parts by weight. 100 parts by weight of a range of 1 part by weight, preferably 2 parts by weight to 15 parts by weight, preferably 10 parts by weight, more preferably 7 parts by weight of (D) a compatibilizer. And / or 15 parts by weight, preferably 20 parts by weight, more preferably 25 parts by weight, particularly preferably 40 parts by weight of the olefin-based polymer obtained by (A2) (Y treatment). Et 75 parts by weight, preferably 74
Parts by weight, more preferably 72 parts by weight, (B) 0 parts by weight of a tackifier, preferably 3 parts by weight, more preferably 8 parts by weight, particularly preferably 10 to 35 parts by weight, preferably 30 parts by weight. Parts, more preferably in the range of 25 parts by weight, (C) 0 parts by weight of wax, preferably 3 parts by weight, more preferably 8 parts by weight, particularly preferably 10 to 45 parts by weight, preferably 35 parts by weight, more preferably Preferably in the range of 25 parts by weight and (D) 0 parts by weight of the compatibilizer, preferably 0.1 parts by weight, more preferably 1 to 15 parts by weight, preferably 10 parts by weight, more preferably 7 parts by weight. Is a hot melt composition containing 100 parts by weight.

The hot melt composition of the present invention is excellent in fluidity, easy to handle, excellent in coatability, excellent in water dispersibility,
Excellent heat resistance.

In the hot melt composition using the olefin polymer of the present invention, when the blending amount of the olefin polymer of the present invention is within the above range, the moisture resistance is excellent, the disintegration is excellent, and the paper after disintegration is dried. In this case, the heat resistance is excellent without bleeding.

In the hot melt composition of the present invention,
(B) Examples of the tackifier include those having a functional group, such as rosin, modified rosin, and their ester compounds, alkylphenol resins, rosin and alkylphenol-modified xylene resins, and terpene phenol resins, and have no functional group. Examples include terpene resins, olefin resins, styrene resins, aromatic petroleum resins, cumarone indene resins, and the like. Any of these may be selected, or a mixture of two or more may be used. Is done. If the tackifier is larger than the above range in the hot melt composition, the hot melt composition is liable to crack when bent, which is not preferable. (B) As a tackifier, YS RES manufactured by Yasuhara Chemical
INTO-125 or the like can be used.

In the hot melt composition of the present invention,
(C) The waxes are roughly classified into two types, natural waxes and synthetic waxes, and any one of these waxes may be selected, and these waxes may be used alone or in combination of two or more. Natural waxes include paraffin wax,
There are microcrystalline wax, montan wax, carnauba wax, candelilla wax and the like, and synthetic waxes are low molecular weight polyethylene wax,
Examples include low molecular weight polypropylene wax. (C) As the wax, carnauba wax [Yukiyuki Kato Co., Ltd.] or the like can be used. In the hot melt composition, when the wax is larger than the above range, bleeding may occur at the time of papermaking after defibration when used as a paper base or the like, which is not preferable.

In the hot melt composition of the present invention,
(D) The compatibilizer includes low molecular weight polypropylene to which an acid component such as maleic anhydride is grafted, and those having a number average molecular weight in the range of 10,000 to 50,000 are suitably used. If the number average molecular weight is less than 10,000, the above heat resistance becomes insufficient, and if it exceeds 50,000, the effect of compatibilization may be reduced. (D) Umex 1001 manufactured by Sanyo Chemical Co., Ltd. can be used as the compatibilizer. In the hot melt composition, when the compatibilizer is larger than the above range, the heat stability of the hot melt composition may deteriorate, which is not preferable.

The hot melt composition according to the present invention may further contain an antioxidant such as a hindered phenol-based antioxidant, a stabilizer such as a secondary antioxidant, and additives.

The hot melt composition of the present invention can be coated and / or impregnated on a paper substrate and used by mixing with the paper substrate to obtain a recyclable moisture-proof paper having excellent fibrillation properties and excellent heat resistance. Can be obtained. The hot melt composition of the present invention has a content of 5 g / m ² , more preferably 10 g / m ² , especially 15 g / m ^2.
To 50 g / m ² , more preferably 40 g / m ² , particularly preferably 30 g / m ² .

The method of applying the hot melt composition of the present invention to a paper substrate can be a roll coater, a slot orifice coater, an extrusion coater, or the like, but is not limited thereto. Is also good.

[0042]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the invention is limited thereto.

[Evaluation Method] [1] Density: A sample used for measuring the density of the amorphous polyolefin was sandwiched between metal plates coated with Teflon (registered trademark) and heated and compressed at 190 ° C. to form a sheet. After that, it was left to cool at 23 ° C., and the density was measured using a density gradient tube. [2] Melt flow rate (MFR): JIS K7
230 ° C. using a melt indexer according to
(3) Melt viscosity (Pa · S): BROOKFIELD
ASTM D32 using a Viscometer DV-II
Measured according to 36-73.

[4] Molecular weight distribution: The molecular weight distribution (Mw / Mn) of the composition and the mixture was measured by gel permeation chromatography (GPC). The measurement method is shown below. (1) Measurement device: WATERS 150C gel permeation chromatograph was used. (2) Measurement sample: The measurement data was measured at a concentration of 0.3 wt /
It was completely dissolved in a solvent (o-dichlorobenzene, reagent grade) at vol%. (3) Molecular weight distribution measurement: high temperature GPC manufactured by WATERS
(150C type) using the measurement sample 0.4 of the above (2)
ml of GPC precolumn Shodex HT-G x 1
And GPC column Shodex HT-806M x 2 + Shodex HT-803 x 1
Dichlorobenzene, temperature 135 ° C., flow rate 1.0 ml / min. The measurement by GPC was performed for 35 minutes. G
The polymer concentration in the solution separated by the PC column is
It was measured with a differential refractometer (RI). The molecular weight was converted using a polystyrene standard. (4) Data processing: Data processing is performed in VAX-STATI
ON3100 was used. G obtained by the above measurement (3)
When a baseline is drawn on the PC chromatogram, the area is integrated using data processing software attached to the apparatus, and the number average molecular weight (Mn), weight average molecular weight (Mw), Mw / Mn
Is automatically calculated. The GPC chromatogram is defined on the screen of the apparatus as the size of the figure, with the horizontal axis standardizing 125 mm per 20 minutes of measurement time and the vertical axis the total integrated elution amount as 100,
The measurement was performed at 13 mm per 20 mm.

[5] Strength at break (MPa): thickness 1 m
m was prepared, and a test piece punched with a JIS No. 1 dumbbell was measured at a temperature of 25 ° C. and a tensile speed of 500 mm / min.

[6] Coatability: The composition, the resin or the mixture was stirred and mixed in a metal beaker kept at 230 ° C., and then coated on a 75 g / m ² kraft paper using a Meyer bar at 20 g / m ² . Coating was carried out under the conditions, and applicability was visually observed. ：: Uniform application possible, ×: Uniform application not possible. [7] Fibrillation: The composition, the resin or the mixture is stirred and mixed in a metal beaker kept at 230 ° C., and then is spread on a 75 g / m ² kraft paper using a Meyer bar at 20 g / m ^2.
Was coated with a standard pulp dissociator for 30 minutes, and the fibrillation of the pulp and the resin was visually observed. ：: Uniform defibration possible, ×: Uniform defibration not possible. [8] Heat resistance: Paper was made from the defibrated material of (2).
This paper is heated in an oven at 150 ° C. for 3 minutes,
The bleeding of the resin component was visually observed. ：: no bleeding was observed, x: bleeding was observed.

Example 1 50% by weight of random polypropylene (F221, manufactured by Grand Polymer Co., ethylene content: 3% by weight, MFR (230 ° C.): 0.8 g / 10 minutes) and propylene-butene-1 Crystalline polyolefin (Ube Tack UT2780 manufactured by Ube Industries, butene content: 38% by weight, density: 0.87 g / cm ³ , number average molecular weight (Mn): 6400, molecular weight distribution (Mw / M)
n): 15, melt viscosity (190 ° C.): 8 Pa · S, melt viscosity (230 ° C.): 3.4 Pa · S)
C1 (hopper side) -C2-C3-C4-C5-C6-
155 ° C, 200 ° C, 230 ° C, 230 ° C,
The mixture was kneaded with a twin-screw extruder set at 220 rpm, 190 ° C, and 170 ° C at a screw rotation speed of 180 rpm to form a uniform mixture. Next, the amount of active oxygen generated relative to 100 parts by weight of this mixture is 0.019 parts by weight (0.09 parts by weight).
0.2 weight of 1.3-bis- (tertiary-butylperoxy-isopropyl) -benzene (Percadox 14, manufactured by Kayaku Nuuri Co., Ltd., active oxygen generation amount 9.5%) so as to obtain 012 mol). Was added and kneaded in an extruder at 230 ° C. to obtain an olefin-based polymer. This olefin-based polymer has a number average molecular weight (Mn) of 1.4 ×
10 ⁴ , the molecular weight distribution was (Mw / Mn) 9.3, and the melt viscosity (230 ° C.) and strength at break of the olefin polymer were evaluated. The results are shown in Table 1.

Example 2 Non-concentration of 50% by weight of random polypropylene (F221 manufactured by Grand Polymer Co., ethylene content: 3% by weight, MFR (230 ° C.): 0.8 g / 10 minutes) and propylene-butene-1 Crystalline polyolefin (Ube Tack UT2780 manufactured by Ube Industries, butene content: 38% by weight, density: 0.87 g / cm ³ , number average molecular weight (Mn): 6400, molecular weight distribution (Mw / M)
n): 15, melt viscosity (190 ° C.): 8 Pa · S, melt viscosity (230 ° C.): 3.4 Pa · S) and 50% by weight were kneaded with a twin-screw extruder under the same conditions as in Example 1 to obtain a uniform mixture. A good mixture was made. Next, the amount of active oxygen generated per 100 parts by weight of the mixture is 0.0095 parts by weight (0.0006 parts by weight).
Mol), 1.3-bis- (tert-butylperoxy-isopropyl) -benzene (Percadox 14, manufactured by Kayaku Nuuri Co., Ltd., active oxygen generation amount 9.
5%) 0.1 part by weight of maleic anhydride and 0.005 mol (about 0.5 part by weight) of maleic anhydride were added and kneaded in an extruder at 230 ° C. to obtain an olefin-based polymer. The melt viscosity (230 ° C.) and the strength at break of this olefin polymer were evaluated, and the results are shown in Table 1.

Example 3 67 parts by weight of the olefin polymer obtained in Example 1, 15 parts by weight of an aromatic modified terpene hydrocarbon resin (petroleum resin) as a tackifier, and 15 parts by weight of a low molecular weight polyethylene wax as a wax Parts and 3 parts by weight of a maleic anhydride-modified low molecular weight polypropylene as a compatibilizer were added and stirred and mixed in a container kept at 230 ° C. to obtain a resin composition. This resin composition was spread on Kraft paper weighing 75 g / m ² using a Meyer bar.
The coating was performed at a ratio of g / m ² , and the coating properties, defibration properties and heat resistance were evaluated. The results are shown in Table 1.

Example 4 70 parts by weight of the olefin polymer obtained in Example 2, 15 parts by weight of an aromatic modified terpene hydrocarbon resin (petroleum resin) as a tackifier and 15 parts by weight of a low molecular weight polyethylene wax as a wax Were stirred and mixed in a metal beaker kept at 230 ° C. to obtain a resin composition. The resin composition was coated on Kraft paper having a weight of 75 g / m ^{2 at} a ratio of 20 g / m ² using a Meyer bar, and the coating properties, defibration properties and heat resistance were evaluated. The results are shown in Table 1.

[Comparative Example 1] 50% by weight of random polypropylene (F221 manufactured by Grand Polymer Co., Ltd., ethylene content: 3% by weight, MFR (230 ° C.): 0.8 g / 10 minutes), and amorphous mainly composed of propylene Polyolefin (Ube Tack UT2780 manufactured by Ube Industries, butene content:
38%, melt viscosity at 230 ° C .: 3.4 Pa · S) 50
% By weight with a twin-screw extruder to obtain a uniform mixture.
The obtained mixture had a molecular weight distribution (Mw / Mn) of 34, and was further evaluated for melt viscosity (230 ° C.) and strength at break. The results are shown in Table 1. 52 parts by weight of this mixture, a tackifier 15 parts by weight of a petroleum resin, 15 parts by weight of a low-molecular-weight polyethylene wax as a wax, 15 parts by weight of a polypropylene wax, and 3 parts by weight of a maleic anhydride-modified low-molecular-weight PP as a compatibilizer, and using a metal beaker kept at 230 ° C. The mixture was stirred and mixed to obtain a resin composition. This resin composition was weighed to 75 g / m ² using a Meyer bar.
Was coated at a ratio of 20 g / m ² on kraft paper of No. 1, and the coating properties, defibration properties and heat resistance were evaluated. Both the mixture and the resin composition had high viscosities, and it was difficult to apply uniformly and thinly. Kraft paper coated with this resin composition did not open uniformly and film-like flakes were observed.

Comparative Example 2 The amount of active oxygen generated per 100 parts by weight of random polypropylene (F221 manufactured by Grand Polymer Co., ethylene content: 3% by weight, MFR (230 ° C.): 0.8 g / 10 minutes) was determined. 1.3-bis- (tert-butylperoxy-isopropyl) -benzene (Perkadox 14 manufactured by Kayaku Nury Co., Ltd., active oxygen generation amount 9 so as to be 0.048 parts by weight (0.003 mol)) 0.5% by weight) and kneaded in an extruder at 230 ° C. to obtain a kneaded product. This kneaded material is
The number average molecular weight (Mn) is 8,000 and the molecular weight distribution is 2.
The melt viscosity (230 ° C.) and the strength at break were evaluated, and the results are shown in Table 1. 67 parts by weight of this kneaded material, 15 parts by weight of a petroleum resin as a tackifier, 15 parts by weight of a low-molecular-weight polyethylene wax as a wax, and 3 parts by weight of a maleic anhydride-modified low-molecular-weight polypropylene as a compatibilizer were added, and the mixture was kept at 230 ° C. The mixture was stirred and mixed with a metal beaker to obtain a resin composition. The resin composition weight using Mayer bar to 75 g / m ² kraft paper to 20 g / m ²
Coating at the rate of, evaluate the coating properties, fibrillation and heat resistance,
Table 1 shows the results. Kraft paper coated with this resin composition was poor in defibration, and thus could not be measured for heat resistance.

Comparative Example 3 Amorphous polyolefin comprising propylene-butene-1 (Ubetack UT manufactured by Ube Industries)
2780, butene content: 38% by weight, density: 0.87
g / cm ³ , number average molecular weight (Mn): 6400, molecular weight distribution (Mw / Mn): 15, melt viscosity (190 ° C.): 8
Pa · S, melt viscosity (230 ° C): 3.4 Pa · S) 5
2 parts by weight, 15 parts by weight of a petroleum resin as a tackifier, 15 parts by weight of a low molecular weight polyethylene wax as a wax, 15 parts by weight of a polypropylene wax, and 3 parts by weight of a maleic anhydride-modified low molecular weight PP as a compatibilizer.
The mixture was stirred and mixed with a metal beaker kept at 30 ° C. to obtain a resin composition. Weight the resin composition using a Meyer bar 7
It was coated at a rate of 20 g / m ² in the Kraft paper 5 g / m ^2, coating property, and evaluate the fibrillation property and heat resistance, and the results are shown in Table 1. Amorphous polyolefin composed of propylene-butene-1 (Ube Tack UT2780 manufactured by Ube Industries, butene content: 38% by weight, density: 0.87 g / cm ³ , number average molecular weight (Mn): 6400, molecular weight distribution (Mw / M
n): 15, melt viscosity (190 ° C.): 8 Pa · S, melt viscosity (230 ° C.): 3.4 Pa · S)
0 ° C.) and strength at break. The results are shown in Table 1.

[0054]

[Table 1]

[0055]

The olefin polymer of the present invention can provide an adhesive, a hot melt composition and a moisture-proof paper having excellent heat resistance and excellent water dispersibility. The olefin-based polymer of the present invention has excellent heat resistance and can be used for a hot melt composition having excellent heat resistance and water dispersibility for recycling to waste paper, which is required to be further improved.

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) C08L 93/04 C08L 93/04 C09J 123/26 C09J 123/26 151/06 151/06 D21H 19/20 D21H 19/20 Z 21/16 21/16 F-term (reference) 4J002 AE03Y AF02X BA01X BB00X BB03Y BB12Y BB20W BB21W BB21Z BC02X BK00X BN03W CE00X FD20Z FD34X GJ01 4J040 BA182 BA202 DA002 DA022 DA101 DA102 DA03 DA211 JB01 KA26 LA01 LA07 LA08 MA09 4J100 BA16H HA53 HA57 HC30 HC36 HC42 JA03 4L055 AG34 AG51 AG58 AG60 AH50 EA25 EA32 GA47

Claims (5)

[Claims] 1. An olefin-based polymer obtained by the following (X treatment) and / or (Y treatment). (X treatment) Radical 0.0 per 100 parts by weight of a mixture containing amorphous polyolefin and random polypropylene
It is treated with a radical generator that generates from 0031 mol to 0.0062 mol. (Y treatment) Radical 0.0 per 100 parts by weight of a mixture containing amorphous polyolefin and random polypropylene
The treatment is carried out with 0.0005 mol to 1 mol of a radical generator and an acid anhydride to generate 0031 mol to 0.0062 mol. 2. The olefin polymer according to claim 1, wherein the olefin polymer has a melt viscosity at 230 ° C. of 3 Pa · S to 100 Pa · S. (A1) 15 to 75 parts by weight of an olefin polymer obtained by the (X treatment) according to claim 1;
(B) 0 to 35 parts by weight of a tackifier, (C) wax 0 to
35 parts by weight and 1 to 15 parts by weight of (D) the compatibilizing agent
A hot melt composition containing 00 parts by weight. (A2) 15 to 75 parts by weight of an olefin polymer obtained by the (Y treatment) according to claim 1;
(B) 0 to 35 parts by weight of a tackifier, (C) wax 0 to
35 parts by weight and 0 to 15 parts by weight of (D) the compatibilizing agent
A hot melt composition containing 00 parts by weight. 5. A moisture-proof paper comprising the hot melt composition according to claim 3 and a paper substrate.