JPH0593124A - Propylene polymer composition - Google Patents

Abstract

PURPOSE:To prepare the title compsn. improved in adhesion to a urethane polymer by compounding a propylene polymer grafted with an org. hydroxyl compd. with a copolymer consisting of ethylene and an org. hydroxyl compd. CONSTITUTION:The title compsn. is prepd. by compounding 100 pts.wt. propylene polymer grafted with an org. hydroxyl compd. having a carbon-carbon double bond with 5-100 pts.wt. copolymer prepd. from ethylene and an org. hydroxyl compd. having a carbon-carbon double bond. The compsn. adheres well to a urethane polymer because the compsn. contains hydroxyl groups which react with isocyanate groups of the urethane polymer to form urethane bonds. The grafting onto the propylene polymer is conducted by treating it with the org. hydroxyl compd. and an org. peroxide.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propylene polymer composition having excellent adhesion to a polyurethane resin without using a primer.

[0002]

As is well known, polyolefin resins (polypropylene resin, polyethylene resin) have not only excellent moldability but also mechanical properties, heat resistance, solvent resistance, oil resistance, chemical resistance, etc. Because of its good characteristics, it is widely industrially manufactured and used in various fields as automobiles, electric appliances, parts and packaging materials for electronic devices, various containers, and other daily necessities.

However, since it does not have a polar group in the molecule (it is so-called inactive), the adhesion to various substances is not good. Among these, the adhesion with the polyurethane resin will be described.

At present, exterior parts such as bumpers and bumper corners of automobiles have recently been produced by adding ethylene-propylene copolymer rubber or inorganic to a propylene-based polymer containing propylene as a main component for the purpose of weight reduction and cost reduction of automobiles. Mold a composition containing a filler (mainly talc),
Surface treatment such as electrical treatment (for example, corona discharge treatment, plasma treatment), mechanical surface roughening, flame treatment, oxygen or ozone treatment of the molded product, and primer coating with good adhesion to the propylene-based polymer However, polyurethane paint is applied.

However, in the step of applying the primer, generally, the primer is completely adhered (baked) after the application of the primer, but this step requires a long time (usually about 40 to 80 minutes). There is. Moreover, since the step of applying twice is required, so much organic solvent (for example, toluene) must be used, which causes a problem of deterioration of working environment and air pollution.

Polyurethane foam takes advantage of its heat insulating properties and cushioning properties to serve as a cushioning material for automobile interior parts such as instrument panels, armrests and seat backs, as well as household electric appliances such as electric refrigerators and coolers. Used as a heat insulating material for products and frozen trucks.

When a polyurethane foam is used in such a field, it is often necessary that the substrate or surface material of the product and the polyurethane foam are firmly adhered to each other.

By the way, when the substrate or surface material has a high surface activity such as metal, wood and ABS resin (acrylonitrile-butadiene-styrene terpolymer resin), it has excellent adhesion to polyurethane foam. Therefore, if the urethane polymer formation reaction and foaming are performed simultaneously on the substrate by a method such as injection foaming, which is used in the production of polyurethane foam, a product (laminate) with strong adhesion can be obtained. be able to.

However, it is impossible to produce a laminate with a polyurethane foam by using an inactive polyolefin resin as a base material or a surface material as described above because the adhesion is extremely low.

Therefore, when the polyolefin resin and the polyurethane foam are brought into close contact with each other, the primer must be applied to the surface of the molded product of the polyolefin resin in advance as described above.

For these reasons, a polyolefin resin is treated with an organic compound having at least one unsaturated bond in the molecule and containing a hydroxyl group [hereinafter referred to as "hydroxyl compound"] and at least an organic peroxide. A modified polyolefin-based resin [hereinafter referred to as "modified product (A)"] obtained by such a method has been proposed for improving the adhesion to a polyurethane-based paint or polyurethane foam (for example, JP-A-58-154732).
No. 58-191706 and 58-185344.
No. 61-272417).

Among polyolefin resins, modified products obtained by treating propylene polymers (polypropylene resins) in the same manner as described above, crystalline ethylene-propylene block copolymers and amorphous ethylene-propylene copolymers. Compositions with polymers, inorganic fillers, etc., not only have excellent adhesion to polyurethane without the application of a primer, but also have good flexural modulus and low-temperature impact resistance, and have good processability. Also, since it has excellent moldability, it has been previously proposed that the molded product is suitable for use as an automobile exterior component such as a bumper (for example, Japanese Patent Laid-Open No. 62-119243).
No. 62-209150 and No. 62-207344.
No. 62-257945).

Furthermore, the composition of the modified product (A) and the crystalline ethylene-propylene block copolymer, ethylene-vinyl acetate copolymer, etc., is a chloroprene-based two-component mixed type adhesive without applying a primer. Not only good adhesion at room temperature with the agent, but also excellent adhesion even at a temperature of 80 ° C, and also good bending elastic modulus and impact resistance, so that interior parts of automobiles (for example, It has been previously proposed to adapt to a door liner (Japanese Patent Laid-Open Nos. 64-29446 and 64-366).
No. 36, No. 64-45446, No. 64-48842
No. 64-72946).

Further, a polyolefin resin and --OH which bonds to ethylene and carbon other than the polymerizable unsaturated bond carbon.
A resin composed of a copolymer obtained by radically polymerizing a polymerizable compound having a group or an amino NH group under high pressure is
It has been proposed that excellent adhesion is exhibited with respect to polyurethane paints (JP-A-3-24139).

[0015]

In the above conventional technique, compared with ordinary polypropylene and polyethylene,
Although the adhesion to urethane is improved, it is hard to say that it is practically sufficient.

From the above, the present invention provides a composition having excellent adhesion to polyurethane paints and polyurethane foams without using a primer, as compared with the prior art, and to be suitable for the interior and exterior of automobiles. The purpose is to manufacture.

[0017]

Means and Actions for Solving the Problems The present invention has solved these problems, and (A) an organic compound having a carbon-carbon unsaturated bond and containing an --OH group is grafted. 100 parts by weight of the propylene-based polymer
(B) a copolymer having ethylene and a carbon-carbon unsaturated bond and obtained from an organic compound containing —OH in an amount of 5 to 100 parts by weight, which is excellent in adhesion and paintability. It can be solved by the propylene polymer composition.

The present invention will be specifically described below. Used in the present invention has a carbon-carbon unsaturated bond and -OH
A propylene-based polymer (hereinafter referred to as modified polypropylene) grafted with an organic compound having a group will be described.

(1) Propylene-based polymer The propylene-based polymer used as a raw material of the modified polypropylene used in the present invention is a propylene homopolymer, a random copolymer of propylene as a main component with ethylene, or a component thereof. It is a block copolymer. The copolymerization ratio of ethylene in these random or block polypropylene copolymers is at most 20% by weight, preferably at most 15% by weight. When the ethylene copolymerization ratio exceeds 20% by weight, the elastic modulus of the obtained composition is low.

(2) having a carbon-carbon unsaturated bond,
OH group-containing organic compound (hereinafter referred to as hydroxy compound) The hydroxy compound used as the raw material of the modified polypropylene used in the present invention is selected from the following compound group.

That is, hydroxyalkyl (meth) acrylate, hydroxyalkylalkoxy (meth) acrylate, hydroxyalkyldialkoxy (meth)
Acrylate, hydroxyalkyl polyalkoxy (meth) acrylate and the like can be mentioned, and further specific examples of the (meth) acrylates include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate and 2-hydroxyethyl (meth) acrylate. Examples thereof include hydroxybutyl (meth) acrylate, 2-hydroxyethylethoxy (meth) acrylate, dipropylene glycol mono (meth) acrylate, polyethylene glycol mono (meth) acrylate and the like.

Further, there may be mentioned hydroxyalkyl vinyl ethers, hydroxyalkyl alkoxy vinyl ethers, hydroxyalkyl dialkoxy vinyl ethers, hydroxyalkyl polyalkoxy vinyl ethers, and the like. Specific examples of these vinyl ether compounds include 2-hydroxyethyl vinyl ether and 2-hydroxyethyl vinyl ether. It may include hydroxypropyl vinyl ether, diethylene glycol monovinyl ether and the like. Also, allyl alcohol and the like can be used.

(3) Manufacturing Method The modified polypropylene used in the present invention is obtained by treating a propylene polymer and a hydroxy compound with an organic peroxide. The organic peroxide used here is generally used as an initiator in radical polymerization and a crosslinking agent for the polymer, and has a half-life of 10 minutes per minute.
It is preferably 0 ° C. or higher, and particularly preferably 110 ° C. or higher.

If the temperature is less than 100 ° C., it is not desirable because it is difficult to handle and the effect of use is not so noticeable.

Typical examples of preferable organic peroxides include:
1,1-bis-tertiary-butylperoxy-3,3,5
-Ketone peroxide such as trimethylcyclohexane, dialkyl peroxide such as dicumyl peroxide, hydroperoxide such as 2,5-dimethylhexane-2,5-hydroperoxide, diacyl peroxide such as benzoyl peroxide and 2,
Examples include peroxyesters such as 5-dimethyl-2,5-dibenzoylperoxyhexane.

Further, the reactivity can be improved by further adding an organic tin compound, which will be described later, to these and treating them.

Examples of the organic tin compound include those represented by the following formula (I).

[0028]

[Chemical 1]

In the formula (I), R ₃ , R ₄ , R ₅ and R ₆ may be the same or different and have at most 12 carbon atoms.
Hydrocarbon groups, wherein Y ₁ and Y ₂ may be the same or different, and are monovalent or divalent carboxylic acids having at most 18 carbon atoms, derivatives of the carboxylic acids (alkyl esters), alcohols, mercaptans. , Mercapto acid. X ₁ is an oxygen atom, a sulfur atom and a carboxylic acid group having a double bond having at most 4 carbon atoms, and L is 0 or an integer of 1 to 20.

Typical examples of the organic tin compound are monobutyl tin tin trimethylmalate, dibutyl tin tin dilaurate, a mixture of dibutyl tin tin dimalate and dibutyl tin tin dimethyl maleate, dibutyl tin tin dioctylmerate. Rate and tribenzyl-tin-trimethylmaleate.

The modified polypropylene of the present invention can be produced by a commonly used known method such as a solution method,
It can also be achieved by adopting any one of a suspension method and a melting method.

Among these treatment methods, the melting method is industrially desirable because it requires a short treatment time and does not require post-treatment such as removal of organic solvent and water.

The proportion of the hydroxy compound in the modified polypropylene is 0.01 to 20% by weight, preferably 0.02 to 15% by weight. If the proportion of the hydroxy compound is less than 0.01% by weight, the adhesion to polyurethane will be poor. On the other hand, even if it exceeds 20% by weight, the effect of improving the adhesiveness depending on the ratio is not recognized.

Next, a copolymer obtained from ethylene and a hydroxyl compound used in the present invention (hereinafter referred to as an ethylene copolymer) will be described.

(1) Hydroxy Compound The hydroxy compound used as the raw material for the ethylene copolymer used in the present invention is the same compound group ([0
021], [0022]).

The hydroxyl compound to be copolymerized with ethylene of the present invention is 3 to 50% by weight, preferably 5 to 40% by weight, based on the total amount of ethylene. If the hydroxy compound content is less than 3% by weight, peeling of the coating film surface of the composition tends to occur. On the other hand, when the amount of the hydroxy compound is more than 50% by weight, the copolymer becomes amorphous, which makes it difficult to handle and has a drawback that the dispersibility in the modified polypropylene is lowered.

The ethylene-based copolymer in the present invention may contain a polymerizable third component monomer (hereinafter referred to as other monomer) in addition to the above-mentioned hydroxy compound. Examples of the other monomer include ester compounds, amide compounds, acid compounds, ether compounds, hydrocarbon compounds and the like.

Specifically, the ester compounds include vinyl acetate, methyl acrylate, ethyl acrylate,
Propyl acrylate, butyl acrylate, hexyl acrylate, octyl acrylate, lauryl acrylate, benzyl acrylate, N, N-dimethylaminoethyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, Hexyl methacrylate, octyl methacrylate, lauryl methacrylate, N, N-dimethylaminoethyl methacrylate, methyl fumarate, ethyl fumarate, propyl fumarate, butyl fumarate, dimethyl fumarate, diethyl fumarate,
Examples thereof include dipropyl fumarate, dibutyl fumarate, methyl maleate, ethyl maleate, propyl maleate, butyl maleate, dimethyl maleate, diethyl maleate, dipropyl maleate and dibutyl maleate.

Acrylamide as the amide compound,
Methacrylamide, N-methyl acrylamide, N-ethyl acrylamide, N-propyl acrylamide, N
-Butylacrylamide, N-hexylacrylamide, N-octylacrylamide, N, N-dimethylacrylamide, N, N-diethylacrylamide, N,
Examples thereof include N-dimethyl methacrylamide, N, N-diethyl methacrylamide and the like.

Examples of the acid compound include acrylic acid, methacrylic acid, maleic acid, fumaric acid and the like.

Examples of ether compounds include methyl vinyl ether, ethyl vinyl ether, propyl vinyl ether, butyl vinyl ether, octadecyl vinyl ether, phenyl vinyl ether and the like.

Hydrocarbon compounds include styrene, norbornene, butadiene and the like. In addition to them, acrylonitrile, methacrylonitrile, acrolein, crotonaldehyde, trimethoxyvinylsilane, vinyl chloride,
Vinylidene chloride etc. can be mentioned.

Depending on the intended use of the composition, one kind or two or more kinds of other monomers can be selected. The content of these third components in the ethylene polymer is at most 40% by weight. If the content exceeds 40% by weight, the original properties of the polyethylene resin will be impaired.

In order for the ethylene-based copolymer of the present invention to exhibit the original properties as polyethylene, the total amount of the hydroxy compound and other monomers should be at most 5 in the copolymer.
It is preferably 0% by weight, more preferably the total amount is at most 40% by weight. The above-mentioned other monomers that can be used in the present invention are preferably those that do not react with the hydroxy compound of the present invention, but monomers that can react with the hydroxy compound can also be used if the amount used is stoichiometrically. You can

Particularly, for applications requiring flexibility,
In order to reduce the crystallinity of polyethylene, it is preferable to contain at least 3% by weight of the other monomer. More preferably, at least 5% by weight, particularly preferably at least 10% by weight are used.

Further, in the field where oil resistance is required for industrial materials and the like, it is preferable to use a highly polar third component monomer in the ethylene copolymer. In particular, acrylonitrile, acrylamide, acrylic acid, and acrylic acid ester can be given as specific preferred examples.

The ethylene copolymer used in the present invention is a copolymer obtained by radically polymerizing ethylene and a hydroxy compound under high pressure, and the raw material having the above composition is 700 to 3000 atm, 100 to 3000 atm. It refers to an ethylene-based radical copolymer that is polymerized in the temperature range of 300 ° C. The preferable pressure and temperature ranges are 1000 to 2500 atm, and the average temperature in the reactor is 150 to 270 ° C. If the pressure is less than 700 atm, the molecular weight of the polymer cannot be sufficiently increased, the moldability is lowered, and sufficient physical properties cannot be obtained.

Pressures above 3000 atm are essentially meaningless and only increase manufacturing costs. Temperature is 100
If the temperature is lower than ℃, the reaction is not stable and the conversion rate to the polymer is lowered, which is an economical problem. If the temperature exceeds 300 ° C, the molecular weight of the polymer cannot be increased and the runaway reaction may occur.

As the radical initiator, compounds that generate radicals, mainly organic peroxides can be used. For example, dialkyl peroxides such as di-t-butyl peroxide, dicumyl peroxide and t-butyl cumyl peroxide, diacyl peroxides such as acetyl peroxide, i-butyl peroxide and octanoyl peroxide, di-i-peroxide. Peroxydicarbonates such as propylperoxydicarbonate and di2-ethylhexylperoxydicarbonate, peroxyesters such as t-butylperoxypivalate and t-butylperoxylaurate, methyl ethyl ketone peroxide, cyclohexanone peroxide, etc. Ketone peroxide, 1,1-
Peroxyketals such as bis-t-butylperoxycyclohexane and 2,2-bis-t-butylperoxyoctane, hydroperoxides such as t-butyl hydroperoxide and cumene hydroperoxide, and others 2,2
-Azo compounds such as azobisisobutyronitrile, oxygen, and the like.

It is also possible to use various chain transfer agents as molecular weight regulators in the polymerization. Examples of chain transfer agents include olefins such as propylene, butene and hexene, paraffins such as ethane, propane and butane, carbonyl compounds such as acetone, methyl ethyl ketone and methyl acetate, and aromatic hydrocarbons such as toluene, xylene and ethylbenzene. Etc. can be mentioned.

Next, the composition ratio will be described. The composition ratio of the ethylene copolymer is 5 to 100 parts by weight, preferably 5 to 60 parts by weight, based on 100 parts by weight of the modified polypropylene in the composition of the present invention. When the composition ratio of the ethylene-based copolymer is less than 5 parts by weight, the adhesion strength with polyurethane is insufficient. On the other hand, if it exceeds 100 parts by weight, the mechanical properties such as the flexural modulus of the composition are significantly deteriorated.

Further, in the composition of the present invention, an unmodified propylene polymer, ethylene-propylene rubber, and an inorganic filler are added to the composition for the purpose of obtaining flexural modulus and impact resistance within a range in which adhesion with urethane does not matter. , Can be added.
The propylene-based polymer composition of the present invention is produced by uniformly mixing the above-mentioned composition ratios.

When producing the composition of the present invention, depending on the purpose of use, it is a stabilizer generally used in the field of polyolefin resins for oxygen, heat and ultraviolet rays, a metal deterioration inhibitor, a flame retardant, and a coloring agent. Agents, electrical property improvers, fillers, antistatic agents, lubricants, processability improvers and tackiness improvers within a range not impairing the properties of the propylene polymer of the present invention. You may mix.

The compositions of the present invention may be dry blended using a mixer such as a Henschel mixer, or using a mixer such as a Banbury mixer, kneader, roll mill and screw extruder. You may melt-knead. At this time, a more uniform composition can be obtained by a method of dry blending in advance and further melt-kneading the resulting mixture, or a method of performing melt-kneading twice or more.

Molding Method The propylene polymer composition obtained as described above can be molded into a desired molded article by a molding method generally used in the field of polyolefin resins. Examples of the molding method include an injection molding method, an extrusion molding method, a hollow molding method, a stamping molding method, a compression molding method, and a vacuum molding method.

By applying a polyurethane-based paint to the thus obtained molded body by a method generally used, a molded body having the surface coated with polyurethane can be obtained. Further, in order to adhere to the polyurethane foam, the urethane polymer formation reaction and the foaming may be simultaneously performed on the surface of the molded article obtained as described above.

No special apparatus is required for the close contact, and no special method is required. That is,
A foaming method such as an injection foaming method, a mold foaming method and a spray foaming method, which are commonly used in the field of polyurethane foam production, may be applied. Further, the polyol, the isocyanate compound, the foaming agent, etc. used as the raw material of the polyurethane foam may not be special, and any commonly used one may be used without any limitation.

[0058]

The mechanism of developing the adhesion between the propylene-based polymer composition obtained by the method of the present invention and polyurethane is not clear, but it is presumed to be due to the following mechanism of action.

By binding the hydroxyl group (—OH) of the propylene-based polymer composition obtained by the method of the present invention and the isocyanate group of polyurethane, a strong adhesion is exhibited, for example, with a polyurethane paint.

In addition, in the propylene polymer composition obtained by the present invention, it is easier to introduce a large amount of --OH groups as compared with the case of the modified polypropylene alone, and therefore the adhesion with polyurethane is improved. Conceivable. Further, since the -OH group is present in any of the polypropylene region and ethylene copolymer region in the composition, it is considered that stable adhesive force can be obtained.

(Examples and Comparative Examples) The present invention will be described in more detail with reference to Examples and Comparative Examples. In the examples and comparative examples, the coating adhesion strength was determined by inserting a 1 cm-width streak into a molded flat plate and measuring the 180 ° peel strength of the coating under the condition that the pulling speed was 50 mm / min.

Izod impact strength is ASTM D2
According to No. 56, it was measured at -20 ° C with a notch. Further, the flexural modulus was measured according to ASTM D790.

The unmodified propylene polymer used in the examples and comparative examples, the propylene polymer, the hydroxy compound, the organic peroxide, the organic tin compound, and the ethylene copolymer used in the production of the modified polypropylene were used. The physical properties of the polymer are shown below.

(A) Propylene Polymer As a propylene polymer, MFR (230 ° C.) is 8.5.
g / 10 min propylene homopolymer [hereinafter PP
(A)], MFR (230 ° C) is 8.0 g / 10
Propylene-ethylene random copolymer [hereinafter PP (b)
], An MFR (230 ° C.) of 9.0 g / 10 min, and an ethylene content of 10% by weight, an ethylene-propylene block copolymer [hereinafter referred to as PP (c)] was used.

(B) Modified polypropylene As a propylene-based polymer used for producing the modified polypropylene, a propylene homopolymer having an MFR (230 ° C.) of 0.5 g / 10 min [hereinafter referred to as PP (d)], M
Propylene / ethylene random copolymer [hereinafter referred to as PP (e)] having FR (230 ° C) of 1.5 g / 10 minutes and ethylene copolymerization ratio of 40% by weight, MFR (230
℃) 2.0g / 10 minutes, ethylene content 10% by weight
Ethylene-propylene block copolymer [hereinafter P
P (f)] was used.

Further, 2-hydroxyethyl methacrylate (hereinafter referred to as HEMA) as a hydroxyl compound
Was used. Further, dicumyl peroxide (hereinafter referred to as DCP) was used as a reaction initiator of the graft reaction. Further, dibutyltin malate (hereinafter referred to as compound (1)) was added as an organic tin compound used in the production of modified polypropylene.

In making the modified polypropylene, Table 1
Dry blending the composition shown in 1) using a super mixer, and mixing each mixture with a vented twin-screw extruder (diameter 40 mm)
Pellets of the modified polypropylene were produced by kneading the mixture at 180 ° C. The modified polypropylenes obtained are shown as modified polypropylenes (a to d).

[0068]

[Table 1]

(C) Ethylene Copolymer The ethylene copolymer having the following composition was used. Ethylene-based copolymer (a) Ethylene-2-hydroxyethyl acrylate copolymer MFR (190 ° C) 30 g / 10 minutes 2-Hydroxyethyl acrylate content 8.0
% Ethylene Copolymer (b) Ethylene-Methyl Acrylate-2-Hydroxyethyl Acrylate Copolymer MFR (190 ° C.) 25 g / 10 min Methyl Acrylate Content 25% by Weight 2-Hydroxyethyl Acrylate Content 4. 0
% Ethylene Copolymer (c) Ethylene-Methyl Acrylate-2-Hydroxyethyl Acrylate Copolymer MFR (190 ° C.) 27.0 g / 10 min Methyl Acrylate Content 24% by Weight 2-Hydroxyethyl Acrylate Content 8.0
weight%

Pellets (composition) were produced by kneading the compositions shown in Table 2 at 210 ° C. using a twin-screw extruder with a vent (diameter 30 mm). Each of the obtained pellets was injection-molded at a resin temperature of 210 ° C. to prepare a flat plate-shaped sample (thickness 2 mm, 120 × 120 mm) and a sample for measuring Izod impact strength and flexural modulus. A two-pack type polyurethane coating (trade name: R2, manufactured by Nippon Bee Chemical Co., Ltd.) was applied to each of the test pieces thus obtained.
71, pure white) was evenly sprayed using a spray gun. Then, at a temperature of 60 ° C, 90
It was heated and dried for a minute. The coating film adhesion strength of each test piece thus obtained was measured. Further, the Izod impact strength and the flexural modulus of each of the test pieces were measured. The results are shown in Table 2.

[0071]

[Table 2]

[0072]

As described above, the propylene-based polymer composition obtained by the method of the present invention has excellent adhesion to a polyurethane-based paint even without using a primer. It also has good adhesion to foam.

As a result, it is considered that productivity is improved by omitting steps such as application of primer and drying to the obtained molded product, and the adhesiveness with these polyurethane-based paints, adhesives and foams is significantly improved. Be done.

The propylene polymer composition obtained by the method of the present invention can be used in various fields in order to exert the above-mentioned effects. Typical applications are exterior parts such as automobile bumpers and bumper corners. And interior parts such as instrument panels and door liners, and motorcycle parts such as fenders.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Kobayashi 3-2 Chidori-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Showa Denko K.K.

Claims (1)

[Claims] 1. (A) having a carbon-carbon unsaturated bond,
And 100 parts by weight of a propylene-based polymer grafted with an -OH group-containing organic compound, (B) a copolymer obtained from an organic compound containing ethylene and a carbon-carbon unsaturated bond, and containing -OH. A propylene polymer composition comprising 5 to 100 parts by weight of a polymer, which is excellent in adhesion and paintability.