JPH02153951A - Polyolefin resin composition for adhesive and coating - Google Patents

Abstract

PURPOSE:To obtain the title composition which is effective for adhesions between polyolefin and polar group-containing polymer or metal, and between metals to each other by using a copolymer from an alpha-olefin and an alkenylsilane in the presence of a specific catalyst. CONSTITUTION:In the presence of a catalyst which is composed of a transition metal compound such as titanium halide, vanadium halide and an organometallic compound such as organoaluminum compound e.g., trialkylaluminum, an alpha-olefin such as ethylene, propylene, butene-1 or pentene-1 and an alkenylsilane such as vinylsilane, allyl silane are copolymerized, and the copolymer is used to give the subject composition.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a polyolefin resin composition for adhesives and coatings.Specifically, the present invention relates to a resin composition containing a copolymer of an α-olefin and an alkenylsilane. The present invention relates to polyolefin resin compositions for adhering polar bases between polymers, metals, etc. and polyolefins, or polyolefin resin compositions for coating various paints.

[Prior art]

In order to take advantage of the properties of polyolefins and further provide properties that polyolefins do not originally have, such as gas barrier properties, we use other materials such as saponified ethylene-vinyl acetate copolymers (EVAL) containing polar groups, nylon, and polyesters. Multilayer structures with polymers containing polar groups or multilayer structures with metals such as aluminum and iron are widely practiced.Originally, polyolefins and polymers containing polar groups are not compatible; Because metals do not blend well, they are not bonded by simply pasting them together, but instead an adhesive resin is sandwiched between them. For this purpose, a resin composition containing a polymer in which maleic anhydride is grafted onto a polyolefin is used. In addition, polyolefins are used for various outdoor purposes by taking advantage of their properties and applying appropriate paints to their surfaces. Polyolefins originally have poor paintability with various paints, and there are problems such as the paint film peeling off immediately if left as is. For this reason, methods such as pre-coating the surface of a polyolefin molded product with a substance to provide adhesion between the coating film and the polyolefin, or plasma-treating the surface of the molded product are being carried out.

[Problem to be solved by the invention]

Polymers obtained by grafting maleic anhydride onto polyolefins have certain effects on improving the adhesion between polyolefins and polar group-containing polymers, but they are still insufficient, especially for adhesion between EVAL and polyolefins, or for adhesion to metals. Moreover, when used for metals, there is a problem of corrosion, and there has been a desire to develop a resin composition for adhesives with improved adhesiveness. In addition, - with regard to forceful application, the above method requires the application of another substance before application, which makes the operation complicated, and the plasma treatment requires special equipment for this purpose. be. Therefore, there is a desire for a composition that can improve coating properties simply by mixing with polyolefin without impairing the physical properties of polyolefin. ! Means for Solving the Problem] The present inventors have proposed a resin composition that solves the above problems and has excellent adhesiveness between polyolefin and other polar group-containing polymers or metals, and a composition that improves the paintability of polyolefin. After extensive research, they discovered a polyolefin resin composition with excellent adhesiveness and paintability, and completed the invention.

That is, the present invention is an adhesive polyolefin resin composition containing a copolymer obtained by copolymerizing an α-olefin and an alkenylsilane using a catalyst consisting of a transition metal compound and an organometallic compound. , a polyolefin resin composition for coating containing a copolymer obtained by copolymerizing an α-olefin and an alkenylsilane using a catalyst consisting of a transition metal compound and an organometallic compound.

The copolymer of alkenylsilane and α-olefin obtained by polymerizing alkenylsilane and ethylene in the presence of a transition metal compound and an organometallic compound used in the present invention is disclosed in U.S. Pat. No. 3,223°686. It is shown in No. 3,644.306 that this copolymer is useful as a crosslinked polymer, but it is not known that it is useful as a polymer for resin compositions for adhesives or coatings. do not have.

The alkenylsilane used for copolymerization in the present invention is
General formula, HIC=CI-(CHl)rlsiHJs-a
(In the formula, 1 represents O-12, - represents 1-2, It represents a methyl group or a phenyl group), or the general formula, H, C=C
1l-(CHx)nsiHpcIs-p (wherein, n
is O-12, p is 1-3, R is a methyl group or a phenyl group), for example, vinylsilane, allylsilane, butenylsilane, pentenylsilane or 5i-H5 of these monomers Hydrogen 1
Compounds in which ~2 groups are substituted with alkyl groups or Sl-
(2) Compounds in which 1 to 3 of the hydrogen atoms in a bond are replaced with chloro can be exemplified.

In the present invention, the α-olefin has 1 to 12 carbon atoms.
Examples include one or a mixture of two or more α-olefins, specifically ethylene, propylene, butene-1
1 pentene-1, hexene-1,2 methylpentene-1
is exemplified.

Catalysts consisting of transition metal compounds and organometallic compounds that can be used in the present invention include not only those described in the above-mentioned U.S. patents (but also many catalysts for the polymerization of α-olefins with improved performance that have been disclosed since then). can be used without any problems.

The polymerization method is generally a solvent method using an inert solvent, but bulk polymerization methods and gas phase polymerization methods can also be employed. Here, as a catalyst consisting of a transition metal compound and an organometallic compound, the transition metal compound is titanium halide,
Alternatively, the vanadium halide is preferably an organoaluminium compound as the organometallic compound. For example, titanium trichloride obtained by reducing titanium tetrachloride with metallic aluminum, hydrogen, or organoaluminum, or titanium trichloride obtained by modifying them with an electron-donating compound. and an organoaluminum compound, and if necessary, a catalyst system consisting of an electron-donating compound such as an oxygen-containing organic compound, a catalyst system consisting of vanadium halide, or vanadium oxyhalide and organoaluminium, or a carrier such as magnesium halide, or the like. A transition metal compound catalyst obtained by supporting titanium halide, vanadium halide, or vanadium oxyhalide on a material treated with an electron-donating compound, an organoaluminum compound, and an electron-donating compound such as an oxygen-containing organic compound if necessary. A catalyst system consisting of a compound or a reaction product of magnesium chloride and alcohol is dissolved in a hydrocarbon solvent, and then treated with a precipitant such as titanium tetrachloride to make it insoluble in the hydrocarbon solvent, and if necessary, ester, ether, etc. A catalyst system consisting of a transition metal compound catalyst obtained by treatment with an electron-donating compound, followed by treatment with a titanium halide, an organoaluminum compound, and an electron-donating compound such as an oxygen-containing organic compound if necessary. For example, Ziegler-Natta
Catalysts and Po13nseriza
by John Boor Jr. (Acade)
mic Press), Journal.

f Macromorecular 5ience
Reviews in Macromolec
ular chemistry and phy
sics, C24(3) 355-385 (1984
), C25(1) 57B-597 (1985)).

As the electron-donating compound, oxygen-containing compounds such as ethers, esters, orthoesters, and alkoxy silicon compounds are generally preferred, and alcohols, aldehydes, water, and the like can also be used.

As the organoaluminum compound, trialkylaluminum, dialkylaluminum halide, alkylaluminum sesquihalide, alkyl aluminum civalide can be used, and examples of the alkyl group include methyl group, ethyl group, propyl group, butyl group, hexyl group, etc. Examples of halogen include chlorine, bromine, and iodine.

Here, the polymerization ratio of alkenylsilane and α-olefin is such that it is easy to mix with other polyolefins, and the alkenylsilane content in the mixed composition is l
There is no particular restriction as long as the amount is wtpp or more, and for coatings it is lowtpp■ or more, but usually the alkenylsilane content is 30wt% or less because of the catalytic activity during polymerization, or the following alkenylsilanes are used. It is preferred because it is melt-mixed with a polyolefin that does not contain the copolymer, and the lower limit is about 1 wtpρ for adhesives and about 1Qwtpp- for coatings if the copolymer is used as it is as an adhesive polyolefin, and the molecular weight of the polymer is about 0. Although there is no particular restriction on the molecular weight, it is preferable that the molecular weight is extremely high, for example, from the viewpoint of mixing with other polyolefins, the intrinsic viscosity measured in a tetralin solution at 135° C. is not more than 10, and the intrinsic viscosity is usually 0.1 to 0.1. It is about 5.

In the present invention, the composition containing a copolymer obtained by polymerizing the alkenylsilane and α-olefin using a catalyst consisting of a transition metal compound and an organometallic compound preferably refers to a copolymer containing an alkenylsilane. The alkenylsilane-free polyolefin to be mixed here is not particularly limited, and polymers of various molecular weights or random combinations of olefins can be used as needed. Alternatively, a block copolymer can be used, and one method is to use one having the same composition and molecular weight as the polyolefin to be bonded. As the α-olefin forming the polyolefin, those exemplified as the α-olefin used in copolymerization with alkenylsilane mentioned above are used, and homopolymers of each, random or block copolymers of mutual monomers, etc. Examples include copolymers with a small amount of α-olefin having a larger number of carbon atoms.These polymers can be polymerized using the same catalyst system and under the same conditions as those used for the copolymerization of alkenylsilanes described above. Various types of polyolefins are available and available on the market.

The composition of the present invention may contain various additives that are commonly added to polyolefins, such as antioxidants and ultraviolet absorbers, if necessary. Furthermore, if necessary, organic acids, salts thereof, organic bases, alkoxy compounds of alkali metals and alkaline earth metals, hydroxides, oxides, and compounds selected from noble metals such as palladium and platinum may be added. Although they can be used in combination, in particular, even without the presence of such a catalyst for activating 5i-N, there is sufficient adhesion for ordinary purposes and sufficient paintability for ordinary purposes.

In the present invention, the mixing ratio of the copolymer containing alkenylsilane and the polyolefin not containing the silane compound varies depending on the amount of alkenylsilane present in the copolymer containing alkenylsilane, but after mixing the alkenylsilane unit is 1 wt% to 1 for adhesive use in the entire composition.
wtpp- level, 1wt% to 10wtpp+s for painting
It is common to make it exist to some extent. In addition, a composition can be made by adding only additives such as stabilizers to a copolymer containing alkenylsilane. There are no particular restrictions on the mixing method when producing a composition, and the mixture is uniformly mixed using a Henschel mixer etc. After that, it is common to melt-mix and granulate using an extruder or the like. Of course, it is also possible to use a method such as a plastic bender in which mixing and melting are performed at the same time, or to form a film, sheet, etc. according to the form in which it is used as it is after melting.

〔Example〕

The present invention will be further explained with reference to Examples below.

Example 1 A vibratory mill equipped with four grinding pots each having an internal volume of 42 and containing 9 kg of steel balls each having a diameter of 12 m was prepared. 300 g of magnesium chloride, 60M1 of tetraethoxysilane, and 45-α,α,α-trichlorotoluene were added to each pot under a nitrogen atmosphere and pulverized for 40 hours. 300 g of the co-pulverized material obtained in this way was put into a flask of 51, and 1.5 g of titanium tetrachloride was added.
1. After adding 1.512 toluene, stir at 100°C for 30 minutes, then remove the supernatant, add 1.5 ffi of titanium tetrachloride and 1.51 toluene, and stir at 100°C.
The mixture was stirred for 30 minutes, the supernatant liquid was removed again, and the resulting solid content was washed repeatedly with n-hexane to obtain a transition metal catalyst slurry. When a part of the sample was sampled and the solid content of titanium was analyzed, it was found to be 1.9 wt%.

In a pressure-resistant glass autoclave with an internal volume of 200 d, under a nitrogen atmosphere, 40 ae of toluene, 20 g of the above transition metal catalyst, 0.128 d of diethylaluminum chloride, p-)
Add 0.06 d of methyl ruylate and 0.20 d of triethylaluminum, then add 2.0 d of vinylsilane. Og was introduced under pressure, and then propylene was charged until the amount reached 5 kg/cj, and polymerization was carried out at 70° C. for 2 hours at a constant pressure. Thereafter, the slurry was taken out, filtered and dried to obtain 43 g of powder.

The intrinsic viscosity (hereinafter abbreviated as I) of the obtained powder measured in a tetralin solution at 135°C was 1.45a/g.
When the melting point and crystallization temperature were measured as the maximum peak temperature by increasing or decreasing the temperature at 10"C/min using a differential thermal analyzer, the melting point was 156 °C and the crystallization temperature was 118 °C. According to elemental analysis of this product, it contained 1.6 wt x of vinylsilane units.

Separately, propylene and a small amount of ethylene were polymerized in the same manner as the above polymerization, and the ethylene content was 2.5wtχ and η was 1°60d.
l/g, extraction residual rate when extracted with a Soxhlet extractor (
Hereinafter, it will be abbreviated as ■Summer. Powder weight after extraction/powder weight before extraction (expressed as a 100% ratio) is 91.5%
, a polypropylene copolymer having a melting point of 154°C was obtained.

To 200 g of the propylene copolymer powder obtained here, 10 g of the vinyl silane copolymer obtained above, a phenolic stabilizer in a weight ratio of 10/10,000, and calcium stearate in a weight ratio of 15/10,000 were added and granulated to form an adhesive. A resin composition was obtained.

To measure the adhesive strength, we used EVAL (Kuraray EP-
A sheet of the above-mentioned adhesive composition ( 220℃, 4
g/cj, 3m+n. The peel strength of this multilayer sheet (using an Instron tensile tester, medium 2.5
23°Cs 1100a/in for test piece 1
The T-peel strength was measured at a tensile speed of 2 kg.
It was up to eight.

Comparative Example 1 The same procedure as in Example 1 was carried out except that the vinyl silane copolymer sheet was not used. The adhesive peeled off naturally and the adhesive strength could not be measured.

Example 2 Only ethylene was polymerized in the same manner as in Example 1, and η was 1.
．． Polyethylene of 75 d1/g was obtained. A sheet obtained by mixing this polyethylene and the copolymer of vinylsilane and propylene obtained in Example 1 in the same manner as in Example 1 (thickness 0.
1 mm) was used as the adhesive layer, and an adhesion test was conducted between a 0.2 mm thick polyethylene sheet obtained in the same manner and EVAL Sheet 7, and the peel strength was 2 kg/c- or more.

Comparative Example 2 The same procedure as Example 2 was carried out except that the sheet of the copolymer of Nylsilane and Nylsilane was not used, but the adhesive peeled off naturally and the adhesive strength could not be measured.

Example 3 Copolymerization was carried out in the same manner as in Example 1, except that allylsilane was used instead of nylsilane, and the allylsilane content was 2.1.
When a polymer with wt%, melting point of 152°C, and 1.28 was obtained, and the adhesiveness was evaluated in the same manner as in Example 1, the peel strength was 2k.
It was on g8-he.

Example 4 Ethylene was used instead of propylene in Example 1 to copolymerize ethylene and vinylsilane. Toluene was added to a pressure-resistant glass autoclave with an internal volume of 200 ad under a nitrogen atmosphere.
-2 Transition metal catalyst used in Example 1 50μ, diethylaluminum chloride 0.128dSp-methyl toluate 0.06d and triethylaluminum 0.20
Then, vinylsilane 4 and Og were introduced under pressure, then hydrogen was charged to 0.2 kg/d and ethylene was charged to 1 kg/cj, and polymerization was carried out at 70° C. for 2 hours at a constant pressure.

Thereafter, the slurry was taken out, filtered and dried to obtain 63 g of powder. The obtained powder has a l content of 1.81 dl/
It was a copolymer of ethylene and nylsilane with a melting point of 126°C and a crystallization temperature of 104°C. According to elemental analysis, it contained 1.3 wt% of vinylsilane units.

Separately, ethylene was homopolymerized to obtain polyethylene having η of 1.88.

To 200 g of the obtained polyethylene powder, 10 g of the above copolymer, a phenolic stabilizer at a weight ratio of 10/10,000 (to polyethylene), and calcium stearate 15
/10,000 weight ratio (to polyethylene) was added and granulated to obtain an adhesive resin composition.

When this composition was evaluated in the same manner as in Example 1, the peel strength was 2 kg/cs or more.

Comparative Example 3 The same procedure as Example 2 was carried out except that the vinyl silane copolymer sheet was not used, but the adhesive peeled off naturally and the adhesive strength could not be measured.

Example 5 A copolymer of propylene and a small amount of ethylene obtained in Example 1 was mixed with polyethylene containing vinylsilane obtained in Example 4 to prepare a composition. Using this composition as an adhesive layer, an adhesion test between a propylene and ethylene copolymer sheet layer and an EVAL sheet layer was performed in the same manner as in Example 1, and the peel strength was 2 kg/c- or more.

Example 6 The same procedure as Example 4 was carried out except that allylsilane was used instead of vinylsilane during copolymerization, and the allylsilane content was 1.81.
obtained a polymer with a melting point of 123°C1η1.31,
When evaluated in the same manner as in Example 4, except that a copolymer of allylsilane and vinylsilane was used instead of a copolymer of ethylene and vinylsilane, the peel strength was 2 kg/c- or more.

Example 7 Copolymer 2 of propylene and vinylsilane obtained in Example 1
η is 1.65, ■! 97 parts by weight of polypropylene with a content of 97.1%, 10 parts by weight of a phenolic stabilizer
/10,000 weight ratio (to polypropylene) and 15/10,000 weight ratio (to polypropylene) of calcium stearate were mixed in a Henschel mixer for 5 minutes, and then granulated at 220°C in a 201φ extruder.

The pellet thus obtained was heated to 220℃ and 100kg/cm.
Compression molding was performed to obtain a 200 μm sheet. To measure the adhesive strength, this sheet was degreased with acetone to a thickness of 1
00. - aluminum plate - aluminum plate - sheet -
10kg/cm at 220℃ by stacking aluminum plates in order
After pressurizing for 10 minutes, the laminate was cooled with water to obtain a laminate. The peel strength of this laminate was Bk 11 cm.

Comparative Example 4 The same procedure as Example 7 was carried out except that the copolymer of propylene and vinylsilane was not used, but the aluminum plate peeled off naturally and the adhesive strength could not be measured.

Example 8 Evaluation was carried out in the same manner as in Example 7, except that the copolymer of propylene and allylsilane obtained in Example 3 was used instead of the copolymer of vinylsilane and propylene, and the peel strength was 1.7.
kg/cm.

Example 9 A galvanized plate (JIS-J-
3302), the peel strength measured was 1.1K.
g/cm.

Comparative Example 5 Comparative Example 4 except that a galvanized plate was used instead of the aluminum plate.
When the same procedure as above was carried out, the zinc-plated plate peeled off naturally and the adhesive strength could not be measured.

Example IO Using the sheet obtained in Example 8 as an adhesive layer, the adhesive strength with a soft iron plate was measured in the same manner as in Example 7, and the peel strength was 1.1 kg 7 cm.

Comparative Example J%6 Comparative Example 4 was repeated except that a soft iron plate was used instead of the aluminum plate, but the soft iron plate peeled off naturally and the adhesive strength could not be measured.

Example 11 Ethylene was polymerized using 10 g of the copolymer of propylene and vinylsilane obtained in Example 1 and the catalyst of Example 1 to obtain polyethylene. 200g of polyethylene powder whose η is 1.88a/g and a phenolic stabilizer of 10/1
0000! (i) ratio (to polyolefin) and calcium stearate 15/10000 weight ratio (to polyolefin) were added and granulated to obtain a resin composition for coating.

To measure coating strength, the above composition was further heated at 220°C.
, 40 KIC/1 liter of Cl to obtain a sheet with a thickness of 1 mm. This sheet was coated with two types of paint (urethane paint: Orester 11182 (manufactured by Mitsui Toatsu Chemicals);
(trade name) and Unirotsuta (manufactured by Rock Paint ■, trade name) as an acrylic paint was applied with a brush, and then baked and dried in an air oven at 60° C. for 30 minutes. When the adhesion strength of the paint film was measured on the test pieces coated with this paint using the JISK-5400 method (cellophane tape test method for base grains), the number of paint films remaining on the base grains was 100 (
(based on 100 coatings).

Comparative Example 7 The same procedure as Example 12 was carried out except that the copolymer of propylene and vinylsilane was not used, and the number of coatings remaining on the base was 5.
There were 10 defective coatings (compared to 100 coatings on the base plate).

Example 12 During the copolymerization in Example 4, allylsilane was used instead of vinylsilane, and the amount of hydrogen used was 0.1 kg/
d was obtained in the same manner as in Example 4, the allylsilane content was 1.7 wt%, the melting point was 126° C1η was 1.48 a/
g, a copolymer of ethylene and allylsilane, and a copolymer of ethylene and butene-1 as the polyolefin (
Contains 1 butene! Example 11 except that 6.5@tχ) is used.
When evaluated in the same manner as in Example 11, the number of coating films remaining on the base plate was 100, which was good.

Example 13 40 d of toluene and 50 d of the transition metal catalyst obtained in Example 1 were placed in a pressure-resistant glass autoclave with an internal volume of 200 ml under a nitrogen atmosphere.
■, diethyl aluminum chloride 0.128d,
Add 0.06 d of methyl p-toluate and 0.20 d of triethylaluminum, then add 4.0 d of vinylsilane. O
After pressurizing the reactor, hydrogen was charged to 0.2 kg/c-d and ethylene was charged to 1 kg/cj, and polymerization was carried out at 70°C for 2 hours at a constant pressure. Thereafter, the slurry was taken out, filtered and dried to obtain 63 g of powder. It was a crystalline ethylene copolymer with η of 1°81, melting point of 126°C, and crystallization temperature of 114°C. According to elemental analysis, it contained 1.3wtχ of vinylsilane units.

In addition, ethylene was separately polymerized to obtain polyethylene having η of 1.88 dl/g.

The resin composition for coating was evaluated in the same manner as in Example 11 except that 10 g of the above copolymer was used for the obtained polyethylene powder 2008, and the number of coatings remaining on each base was 1.
There were 00 pieces.

Comparative Example 8 The same procedure as Example 13 was carried out except that the copolymer of ethylene and vinyl silane was not used. The number of coatings remaining on the base was 5 and 10 (for 100 coatings on the base), which were poor. there were.

Example 14 Using the copolymer obtained in Example 12, which has an allylsilane content of 7 wt% and a melting point of 126°C5η of 1.48 dl/g, polypropylene (manufactured by Mitsui Toatsu Chemical Co., Ltd., Mitsui Noblen) was used as the polyolefin. JHH-G) and evaluated in the same manner as in Example 13, the number of coating films remaining on each base was 100.

Comparative Example 9 The same procedure as Example 14 was performed except that the copolymer of ethylene and 7lylsilane was not used. The number of coatings remaining on the base was 5 and 5 (for 100 coatings on the base), which was poor. Met.

Example 15 The amount of copolymer with an allylsilane content of 1.7 wt% was
The same procedure as in Example 14 was made except that it was changed to 8, and the result was the base! !
! ! The number of membranes remaining was 85 and 90, respectively.

Example 16 Evaluation was carried out in the same manner as in Example 15 except that 0.1 g of lithium ethoxide was further added, and the number of coating films remaining on each base was 100.

Example 17 A copolymer of propylene and vinylsilane was obtained in the same manner as in Example 1. Separately, propylene was polymerized using the same catalyst to obtain polypropylene having η of 1.65 dl/g and II of 97.1%.

To 200 g of the obtained polypropylene powder, add the above copolymer log, a phenolic stabilizer at a weight ratio of 10/10,000 (to polypropylene), and calcium stearate at a weight ratio of 15/10,000 (to polypropylene),
When the resin compositions for coating were granulated and evaluated in the same manner as in Example 11, the number of coating films remaining on each base was 100.

Comparative Example 10 The same procedure as Example 17 was carried out except that the copolymer of propylene and vinylsilane was not used, and the number of coating films remaining on the base was 5 and 10, respectively.

Example 18 The same procedure as Example 17 was carried out except that the amount of the propylene and vinylsilane copolymer used was 5 g, and the number of coatings remaining on each base was 90.95.

Example 19 The adhesive resin composition obtained in Example 18 was formed into a sheet, treated in ethanol at 40°C for 1 hour, and then evaluated in the same manner as in Example 1. There were 100 pieces each.

Example 20 In a pressure-resistant glass autoclave with an internal volume of 2001 d, 40 m of toluene was placed in a nitrogen atmosphere, and the transition metal catalyst 5 obtained in Example 1 was placed.
0.128d, diethylaluminum chloride,
Add 0.06 IIl of p4 methyl ruylate and 0.20 ml of triethylaluminum, then press-fit 4.0 g of vinyltrichlorosilane, and then add 5 kg of propylene.
/cd, and polymerization was carried out at 70° C. under constant pressure for 2 hours. After that, the slurry was taken out, filtered and dried.
g of powder was obtained. The obtained powder has an η of 1.4
It was a crystalline propylene copolymer with a melting point of 148°C and a crystallization temperature of 102°C. According to elemental analysis, it contained 1.8 ut% of vinyltrichlorosilane units. Separately, propylene was polymerized and η was 1.6!
M! A polypropylene having an II of 97.1% was obtained.

To 900 g of the obtained polypropylene powder, 20 g of the above copolymer, 10/10,000 weight ratio of phenolic stabilizer (to polypropylene) and 15/10,000 weight ratio of calcium stearate were added and granulated to obtain a resin composition for coating. When evaluated in the same manner as in Example 11, the number of coating films remaining on each base was 100.

Example 21 The amount of copolymer of propylene and vinyltrichlorosilane used was 10. Except for binding, the procedure was the same as in Example 20, and the number of coating films remaining on the base was 70 and 80, respectively.

Example 22 The adhesive wood 11m11 product obtained in Example 21 was formed into a sheet, treated in ethanol at 40°C for 1 hour, and then evaluated in the same manner as in Example 11. were 100 pieces each.

Example 23 Allyltrichlorosilane content 2.3 wt% obtained by using allyltrichlorosilane instead of vinyltrichlorosilane during copolymerization in the same manner as in Example 20.
When evaluated in the same manner as in Example 20 using polymers having a melting point of 135° C. and a η of 1.34 dl/g, the number of coating films remaining on each base was 100.

〔Effect of the invention〕

The polyolefin resin composition for adhesives of the present invention is effective for adhering polyolefins to polar group-containing polymers, metals, etc., or for adhering metals to each other, and the polyolefin resin composition for coatings does not require special pretreatment. Since the coating film also adheres well, it is of industrial significance.

Patent applicant Mitsui Toatsu Chemical Co., Ltd.

Claims (1)

[Scope of Claims] 1. An adhesive polyolefin resin composition containing a copolymer obtained by copolymerizing an α-olefin and an alkenylsilane using a catalyst consisting of a transition metal compound and an organometallic compound. 2. A polyolefin resin composition for coating containing a copolymer obtained by copolymerizing an α-olefin and an alkenylsilane using a catalyst consisting of a transition metal compound and an organometallic compound.