JP2829432B2 - Thermoplastic resin composition - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a thermoplastic resin composition for molding excellent in weld portion strength, rigidity, dimensional stability and chemical resistance.

[Conventional technology and problems]

Polyolefin is used in many fields as a general-purpose resin because it is excellent in moldability and chemical resistance and is inexpensive. However, there are drawbacks, such as insufficient rigidity, particularly remarkable decrease in rigidity in a high temperature region, and poor dimensional stability and poor paintability.

On the other hand, aromatic vinyl polymers represented by polystyrene have been widely used because they have excellent rigidity and dimensional stability, and in particular, have a feature that the decrease in rigidity in a high temperature region is small. There is a significant drawback of poor chemical resistance.

In view of the above, a method of blending the polyolefin and the aromatic vinyl polymer with each other for the purpose of improving the mutual disadvantages can be considered, but in this case, there is a problem that the compatibility of the two is very poor.

As a method for improving the compatibility between polyolefin and polystyrene, a modified polyolefin obtained by grafting an unsaturated carboxylic acid or an anhydride thereof to polyolefin and an epoxy such as an epoxy group-containing acrylic copolymer or an epoxy group-containing styrene copolymer are used. It has been proposed to use a polymer reaction product with a group-containing polar polymer as a compatibility improver (JP-A-58-198529). According to this method, it is possible to obtain a composition having improved compatibility, good dispersibility, and no delamination. However, the composition obtained by this method has a sufficient strength in the non-weld portion, but is not at a satisfactory level in the strength of the weld portion. It has been found that cohesive enlargement occurs, and there is no particular problem in the molding of small test pieces, but there is a problem that a large molded product has an uneven portion.

Further, the effect of the polymer reaction product of the polyolefin variable and the epoxy group-containing polar polymer per se in JP-A-58-198529 is considered to be an adhesive use or a compatibility improver use of the present invention. The purpose of the invention is different from that of the composition, and there is no disclosure about usefulness as a molded article. The weight average molecular weight and the functional group content of the modified polyolefin described, the weight average molecular weight of the epoxy group-containing polar polymer and the epoxy group content and the type of the polar polymer, for example, the weight average molecular weight of the modified polyolefin 5,000 [Melt flow rate at 230 ° C, 2.16 kg load (hereinafter may be simply abbreviated as MFR) 1,000 g / 10 min or more (measurable)] ~ 1,000,
000 [MFR 0.1 g / 10 min or less (measurable)], the weight average molecular weight of the epoxy group-containing polar polymer is 2,000 [MFR 1,000 g / 10 m
in (not measurable)] to 1,000,000 [MFR 0.1 g / 10 min or less (measurable)], and the range over which useful molded articles can be obtained is not substantially specified. .

Further, JP-A-61-212757 discloses, as a compatibility improver between polyphenylene ether resin and polyolefin,
A combination of an epoxy group-containing polystyrene resin and a modified polyolefin obtained by graft-reacting an unsaturated carboxylic acid or an anhydride thereof with a polyolefin has been proposed. JP-A-64-75560 proposes a similar combination as a compatibility improver between a polycarbonate resin and polyolefin. Even with these methods, it is possible to obtain a resin composition having good dispersibility and excellent mechanical strength and chemical resistance, but for any of these compositions,
Epoxy group content, unsaturated carboxylic acid or anhydride functional group content and molecular weight of each component (or MF
R) has not been substantially specified, nor has the significance of specifying it been suggested. By the way, when these compositions were examined, the results were similar to those in JP-A-58-198529, that is, the strength of the non-weld portion was sufficient, but the strength of the weld portion was satisfactory. It has been found that there is a problem that the dispersed particles cause flocculation and enlargement when left in a molten state for a long time.

For the combination of the epoxy group-containing polystyrene resin and the modified polyolefin itself, the epoxy group content, unsaturated carboxylic acid or anhydride functional group content, and the molecular weight (or MFR) of each component are substantially specified. There is no disclosure of usefulness as a molded article as well.

As described above, the polyolefin and the aromatic vinyl polymer have sufficient compatibility, and the dispersed particles are fine and do not undergo coagulation enlargement, and the weld portion strength, rigidity, dimensional stability and chemical resistance are obtained. In fact, while thermoplastic resin compositions for molding having excellent properties have been demanded as materials for various industrial parts, satisfactory ones have not yet been obtained.
Therefore, an object of the present invention is to solve the above-mentioned disadvantages of the prior art, to improve the compatibility between polyolefin and an aromatic vinyl polymer, and to prevent the dispersed particles from becoming fine and agglomerated. An object of the present invention is to provide a molding thermoplastic resin composition having excellent dimensional stability and chemical resistance.

[Means for solving the problem]

The present inventors have conducted intensive studies and found that a modified polyolefin obtained by grafting an unsaturated carboxylic acid or an anhydride thereof to a polyolefin has a specific functional group content.
The composition itself having a MFR and a predetermined amount of an aromatic vinyl polymer having a specific epoxy group content and an MFR is very suitable for molding processing in view of the melt viscosity, and the object of the present invention The present inventors have found that the present invention is effective in achieving the present invention, and have reached the present invention.

That is, the present invention comprises a thermoplastic resin composition obtained by melt-kneading 10 to 95 wt% of the following components (A) and 95 to 5 wt% of (B).

(A) Modified polyolefin alone or a mixture of polyolefin obtained by grafting an unsaturated carboxylic acid or an anhydride thereof to polyolefin, and the content of the unsaturated carboxylic acid or an anhydride functional group thereof Having a melt flow rate (MFR) of 3 to 1,000 mmol / kg, 230 ° C. and a load of 2.16 kg of 1 to 200 g / 10 min.

(B) an epoxy group-containing aromatic vinyl polymer having an epoxy group content of 50 to 1,000 mmol / kg, alone or as a mixture with an epoxy group-free aromatic vinyl polymer And the content of the epoxy group as the whole of the component (B) is 50 to 1,000 mmol / kg, 230
Melt flow rate (MFR) at 2.16kg load at 1 ℃
5 ~ 200g / 10min.

In the present invention, the modified polyolefin used as the component (A) is preferably obtained by graft-reacting an unsaturated carboxylic acid or an anhydride thereof with the polyolefin.

As the polyolefin, low-density polyethylene,
Linear low-density polyethylene, high-density polyethylene, polypropylene, polybutene-1, polypentene-1, polyhexene-1, poly-4-methylpentene-1 or ethylene, propylene, butene-1, pentene-1, hexene-1,4 And copolymers obtained from a plurality of olefin monomers selected from -methylpentene-1 and the like. Among them, polypropylene or a crystalline copolymer of propylene having propylene as a main component and ethylene or another olefin is preferable.

As the unsaturated carboxylic acid or its anhydride to be graft-reacted to polyolefin, acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid, citraconic acid, maleic anhydride, itaconic anhydride, citraconic anhydride, cis- 4-cyclohexene-1,2-dicarboxylic acid, cis-4-cyclohexene-1,2-dicarboxylic anhydride, endo-bicyclo- (2,2,1) -5-heptene-
2,3-dicarboxylic acid, endo-bicyclo- (2,2,1) -5
-Heptene-2,3-dicarboxylic anhydride; and maleic anhydride is particularly preferred. These unsaturated carboxylic acids or their anhydrides may be used alone or in combination of two or more.

The production of the modified polyolefin can be carried out by various known methods. For example, a method in which a polyolefin and an unsaturated carboxylic acid or an anhydride thereof are reacted in a molten state using an extruder or a Banbury mixer in the presence or absence of a reaction initiator, or both in a molten state in the presence of a solvent. A reaction method may be used.

Component (A) may be a modified polyolefin alone or a mixture of the modified polyolefin and an unmodified polyolefin.

In the case of the mixture, the unmodified polyolefin to be mixed with the modified polyolefin is a polyolefin used for the production of the modified polyolefin, which is widely suitable.In particular, polypropylene or a crystal of propylene containing propylene as a main component and ethylene or other olefins is used. Is preferred.

The method of mixing the modified polyolefin and the unmodified polyolefin is a method capable of mixing both, including a method of preliminarily melting and kneading the two and a method of blending them when producing the composition of the present invention. It can be adopted without particular limitation.

The component (A) in the present invention has an unsaturated carboxylic acid or an anhydride having a functional group content of 3 to 1,000 mmol / kg, preferably 5 to 900 mmol / kg, and an MFR of 1 to 200 g / 10 min.
Preferably, it should be 3 to 180 g / 10 min. That is, when the content of the functional group is less than 3 mmol / kg, a composition having good weld portion strength cannot be obtained, and conversely 1,000 mmol / kg
If the amount exceeds the range, a gelled product is formed in the composition and the commercial value is lowered, which is not preferable. Further, when the MFR is out of the range of 1 to 200 g / 10 min, a composition having a good weld strength cannot be obtained due to a decrease in compatibility, which is similarly unfavorable.

Next, the epoxy group-containing aromatic vinyl polymer used as the component (B) in the present invention is a copolymer comprising an epoxy group-containing unsaturated monomer and an aromatic vinyl monomer or a copolymer thereof with another unsaturated monomer. Can be widely shown.

Examples of the epoxy group-containing unsaturated monomer include glycidyl acrylate, glycidyl methacrylate, allyl glycidyl ether, and 2-methylallyl glycidyl ether. Among them, glycidyl methacrylate is particularly suitable.

As the aromatic vinyl monomer, styrene, α
-Methylstyrene, p-methylstyrene, 2,4-dimethylstyrene, chlorostyrene, vinyltoluene and the like can be used, and styrene is particularly preferred.

Other unsaturated monomers include vinyl cyanide monomers such as acrylonitrile and methacrylonitrile, and acrylic or methacrylic ester monomers such as methyl acrylate, methyl methacrylate, ethyl acrylate and ethyl methacrylate.

Specific examples of the component (B), ie, the epoxy group-containing aromatic vinyl polymer, include styrene-glycidyl methacrylate copolymer and styrene-acrylonitrile-
A glycidyl methacrylate copolymer can be exemplified.

The component (B) may be an epoxy group-containing aromatic vinyl polymer alone or a mixture of the epoxy group-containing aromatic vinyl polymer and an epoxy group-free aromatic vinyl polymer.

In the case of the mixture, as an aromatic vinyl polymer containing no epoxy group, these were rubber-reinforced, including aromatic vinyl monomer homopolymers and copolymers of aromatic vinyl monomers and other unsaturated monomers. Things are suitable. Specifically, polystyrene, poly-α-methylstyrene, high-impact polystyrene, styrene-acrylonitrile copolymer, styrene-methyl methacrylate copolymer,
Examples thereof include styrene-acrylonitrile-methyl methacrylate copolymer, and preferred is polystyrene or styrene-acrylonitrile copolymer.

The method of mixing the epoxy group-containing aromatic vinyl polymer and the epoxy group-free aromatic vinyl polymer may be a method in which both are melt-kneaded in advance or a method in which the two are mixed when the composition of the present invention is produced. Any method can be employed without particular limitation as long as the method can mix the two, including the method of mixing.

Component (B) in the present invention has an epoxy group content of
50-1,000 mmol / kg, preferably 60-800 mmol / kg, and MF
It is necessary that R is 15 to 200 g / 10 min, preferably 30 to 180 g / 10 min. That is, the epoxy group content is 50 mmol
If it is less than / kg, a composition having a good weld strength cannot be obtained, while if it exceeds 1,000 mmol / kg, gelling occurs in the composition and the commercial value decreases, which is not preferable. Further, when the MFR is out of the range of 15 to 200 g / 10 min, a composition having a good weld strength cannot be obtained due to a decrease in compatibility, which is similarly unfavorable.

When the component (B) is a mixture of an epoxy group-containing aromatic vinyl polymer and an epoxy group-free aromatic vinyl polymer, the epoxy group content and the MFR relative to the entire mixture are considered. Even if is included within the scope of the present invention, a composition having a good weld part strength unless the epoxy group content of the epoxy group-containing aromatic vinyl polymer itself is within the range of 50 to 1,000 mmol / kg. Cannot be obtained.

The reason is considered as follows. That is, when the epoxy group content of the epoxy group-containing aromatic vinyl polymer used for mixing exceeds the above range, the compatibility between the polymer and the aromatic vinyl polymer containing no epoxy group decreases. Conversely, when the epoxy group content of the epoxy group-containing aromatic vinyl polymer is less than the above range, the amount of functional groups as a whole as the component (B) becomes insufficient, so that the component (B) This is considered to be because the compatibility with the compound deteriorates, and in each case, only a composition which is inhomogeneous and inferior in compatibility is obtained.

The thermoplastic resin composition of the present invention can be obtained by melt-kneading the component (A) and the component (B), and the mixing ratio is 10 to 95 wt% of the former and 90 to 5 wt% of the latter.
%, Preferably 30 to 80% by weight of the former and 65 to 20% by weight of the latter. If the content of the component (A) is less than 10% by weight, the resulting composition has poor chemical resistance. On the other hand, if the content exceeds 95% by weight, rigidity and dimensional stability become insufficient, so that it should be avoided.

The above-mentioned mixing, melting and kneading can be performed at a temperature of 160 to 300 ° C, preferably 200 to 260 ° C, using a known device such as a single or twin screw extruder or a Banbury mixer. If necessary, a stabilizer, a plasticizer, an antistatic agent, a lubricant, a pigment, a filler and the like can be added at the time of melt-kneading.

As described above, the thermoplastic resin composition of the present invention,
A polymer-reactive product obtained by combining a modified polyolefin as a polyolefin component and an epoxy-containing aromatic vinyl polymer as an aromatic vinyl polymer component, wherein the modified polyolefin is an unsaturated carboxylic acid. Functional group content of acid or anhydride and MFR
By limiting the epoxy group content and the MFR of the aromatic vinyl polymer containing an epoxy machine, compatibility and mechanical properties could be optimized.

〔Example〕

Hereinafter, the present invention will be described specifically with reference to Examples and Comparative Examples, but the present invention is not limited thereto.

 The following evaluation method was used.

(1) Tensile strength (non-weld part) It conformed to JIS K-7113. As the test piece, a JIS No. 1 test piece prepared by injection molding was used.

(2) Weld part tensile strength JIS K-7113 compliant. The test piece was made by injection molding and the shape is the same as the JIS No. 1 test piece,
A weld was formed at the center using a mold having gates at both ends of the test piece.

(3) Tensile strength retention of weld portion From the results of (1) and (2), calculation was made by the following equation.

(4) Chemical resistance A 4mm x 10mm x 100mm test piece made by injection molding
It was immersed in acetone at 23 ° C. for 30 days, and the change in appearance was observed. At this time, those that did not change were evaluated as ○, those that had deteriorated were evaluated as Δ, and those that had significantly deteriorated or dissolved were evaluated as x.

(5) Rigidity Based on JIS K-7203. 4mm produced by injection molding
Using a test piece of × 10 mm × 100 mm, the flexural modulus and flexural strength were measured at 23 ° C, 50 ° C, and 80 ° C, respectively.

(6) Dispersion particle diameter The obtained composition pellet was pressed by a hot press for 2 minutes to form an isotropic sheet having a thickness of 180 to 200 µ. This sheet was broken in liquid nitrogen, and the particle size of the dispersed particles on the broken surface was observed with a scanning electron microscope.

(7) Dispersed particle diameter (after annealing) The obtained composition pellet was kept in a molten state at 250 ° C for 60 minutes by a capillary rheometer (trade name) manufactured by Instron, and then a low shear rate of 12 sec ^-1 was obtained. Extruded. This extruded product was subjected to a hot press, and the particle size of the dispersed particles was observed in the same manner as in (5) to check for the presence of coagulated hypertrophy.

The following components were used. MF described
All R values were measured at 230 ° C and a load of 2.16 kg.

(A) Maleic anhydride-modified polypropylene-1 MFR 0.5g / 10min powdered polypropylene homopolymer 100
Parts by weight, maleic anhydride 0.5 parts by weight, 1,3-bis (t-butylperoxyisopropyl) benzene 0.05 parts by weight,
0.1 parts by weight of 6-di-t-butyl-p-cresol was dry-blended in advance with a Hensiel mixer (trade name) and melted at 200 ° C. with a twin screw extruder having a screw diameter of 45 mm and L / D = 30. MFR obtained by kneading was 30 g / 10 min, maleic anhydride-modified polypropylene having a graft ratio of 0.31 wt% (functional group amount: 31 mmol / kg) (PP-MA in Tables 1 and 2 described below).
H-1).

(B) MFR 160 g / 10 min obtained in the same manner as (a) except that the amount of maleic anhydride-modified polypropylene-2 1,3-bis (t-butylperoxyisopropyl) benzene was changed to 0.15 parts by weight, and grafting was performed. Rate 0.43wt%
Maleic anhydride-modified polypropylene having a functional group content of 43 mmol / kg (abbreviated as PP-MAH-2 in Tables 1 and 2).

(C) Maleic anhydride-modified polypropylene-3 MFR 270 g / 10 min obtained in the same manner as in (a) except that the addition amount of 1,3-bis (t-butylperoxyisopropyl) benzene was 0.22 parts by weight, and grafting was performed. Rate 0.45wt%
Maleic anhydride-modified polypropylene (functional group amount: 45 mmol / kg) (abbreviated as PP-MAH-3 in Tables 1 and 2).

(Iv) Acrylic acid-modified polypropylene MFR 42 g / 10 min, acrylic acid-modified polypropylene (PB-1001 manufactured by BP Performance Plastics Co., Ltd.) having an acrylic acid graft ratio of 6 wt% (functional group amount 830 mmol / kg). In Tables 1 and 2, PP- AA).

(E) Polypropylene-1 A polypropylene homopolymer of MFR 0.5 g / 10 min (abbreviated as PP-1 in Tables 1 and 2).

(F) Polypropylene-2 A polypropylene homopolymer of MFR 25 g / 10 min (abbreviated as PP-2 in Tables 1 and 2).

(G) Polypropylene-3 Powdered homopolymer 100 of MFR 0.5g / 10min
Parts by weight, 0.17 parts by weight of 1,3-bis (t-butylperoxyisopropyl) benzene, 2,6-di-t-butyl-p-
0.1 part by weight of cresol was added to Hensiel mixer (trade name)
Dry blend in advance, and use this as the screw diameter
MFR 160 g / 10 min polypropylene homopolymer (abbreviated as PP-3 in Tables 1 and 2) obtained by melt-kneading at 200 ° C. with a twin screw extruder of 45 mm and L / D = 30.

(H) Styrene-glycidyl methacrylate copolymer-1 Weight average molecular weight 150,000, MFR 49 g / 10 min, glycidyl methacrylate amount 5 wt% (epoxy group content 350 mmol / k
g) Styrene-glycidyl methacrylate copolymer (Blenmer CP-1505S manufactured by NOF Corporation; abbreviated as St-GMA-1 in Tables 1 and 2).

(I) Styrene-glycidyl methacrylate copolymer-2 Weight average molecular weight 100,000, MFR 170 g / 10 min, glycidyl methacrylate amount 5 wt% (epoxy group content 350 mmol / k
g) Styrene-glycidyl methacrylate copolymer (Blenmer CP-1005S, manufactured by NOF Corporation; abbreviated as St-GMA-2 in Tables 1 and 2).

(N) Styrene-glycidyl methacrylate copolymer-3 Styrene-glycidyl methacrylate copolymer having a weight average molecular weight of 21,000, MFR of 1,000 g / 10 min or more (measurable), and a glycidyl methacrylate amount of 50 wt% (epoxy group content of 3,500 mmol / kg). Coalescence (Blenmer CP-50 manufactured by NOF Corporation)
S. In Tables 1 and 2, it is abbreviated as St-GMA-3).

(R) Styrene-acrylonitrile-glycidyl methacrylate copolymer-1 Weight average molecular weight 50,000, MFR 640 g / 10 min, glycidyl methacrylate amount 10 wt% (epoxy group content 700 mmol / k
g) styrene-acrylonitrile-glycidyl methacrylate copolymer (Blenmer CP-51 manufactured by NOF Corporation)
0SA. In Tables 1 and 2, it is abbreviated as St-AN-GMA-1).

(Ii) Styrene-acrylonitrile-styrene-acrylonitrile-glycidyl methacrylate copolymer-2 having a weight average molecular weight of 8,100, MFR of 1,000 g / 10 min or more (not measurable), and glycidyl methacrylate of 20 wt% (epoxy group content of 1,400 mmol / kg). Glycidyl methacrylate copolymer (Blenmer CP-20SA manufactured by NOF Corporation. In Tables 1 and 2, St-AN-GMA-
2).

(W) Polystyrene Polystyrene having a weight average molecular weight of 210,000 and an MFR of 10 g / 10 min (PS in Tables 1 and 2).

Examples 1 to 10 As shown in Table 1 below, each component was put into a Hensiel mixer (trade name) so as to have a predetermined blending amount and dry blended, and then a screw diameter of 45 mm and L / D = 30 were added. The mixture was melt-kneaded at 250 ° C. in a screw extruder. A test piece was prepared by injection molding (250 ° C.) from each of the obtained composition pellets,
Tensile strength (non-weld part), weld part tensile strength and rigidity were measured. From the tensile strength (non-weld part) and the weld part tensile strength, the weld part tensile strength retention was calculated. Further, each composition pellet and each of these composition pellets were subjected to a capillary rheometer (trade name) at 250 ° C.
Subjected to a hot press (250 ° C)
The particle size of each dispersion was observed. The results are shown in Table 1.

Comparative Examples 1 to 3 By injection molding (250 ° C.), polypropylene alone (PP-2), polystyrene alone (PS) and styrene-glycidyl methacrylate copolymer alone (St-GMA-
The test piece of 1) was prepared, and the tensile strength (non-weld part), the tensile strength of the weld part, and the rigidity were measured. Further, the retention ratio of the tensile strength in the weld was calculated from the tensile strength (non-weld portion) and the tensile strength in the weld. The results are shown in Table 2.

Comparative Examples 4 to 11 In the same manner as in Examples 1 to 10, the components shown in Table 2 were blended, melt-kneaded, and the obtained compositions were evaluated. The results are shown in Table 2.

As is clear from the results in Table 1, the thermoplastic resin compositions according to the examples of the present invention have excellent rigidity, particularly in the high temperature region of 50 to 80 ° C, and have fine dispersed particles.
It can be seen that there are advantages such as remarkable improvement in weld portion tensile strength, weld portion tensile strength retention and chemical resistance, and no change in dispersed particle size (coagulation enlargement) due to annealing.

On the other hand, as is evident from the results in Table 2, Comparative Example 1 is an example of polypropylene alone, but lacks strength and rigidity, particularly in a high temperature region, and Comparative Examples 2 and 3 are polystyrene alone. And styrene-glycidyl methacrylate copolymer alone, but are known to have poor chemical resistance. Comparative Example 4 is an example of a composition in which polypropylene and polystyrene each having no functional group or epoxy group were blended. Absent. Comparative Examples 5 and 7 are cases where the functional group content of the component (A) and the epoxy group content of the component (B) are insufficient, respectively. It was weak, and the dispersed particles significantly agglomerated and enlarged by annealing. Comparative Example 6 was a case where the MFR of the component (A) was out of the range of the present invention. However, the MFR of the obtained composition was too high to perform injection molding, and the dispersed particles were huge. Comparative Example 8 was a case where the MFR of the component (B) was out of the range of the present invention. However, the dispersion particles were large, the weld strength was very weak, and the rigidity was slightly improved. Comparative Example 9 is a case where the epoxy group content of the component (B) and the MFR were out of the range of the present invention.
Gelation occurred and melt kneading was not possible. In Comparative Examples 10 and 11, both the epoxy group-containing aromatic vinyl polymer outside the scope of the present invention and polystyrene containing no epoxy group were used in combination, and the epoxy group content and MF of component (B) as a whole were measured.
In the case where R is included in the range of the present invention, the dispersed particles were large, the weld strength was weak, and the rigidity was slightly improved.

〔The invention's effect〕

As described above, the thermoplastic resin composition of the present invention is very suitable as a molding material from the viewpoint of melt viscosity, and has a good compatibility between the polyolefin component and the aromatic vinyl polymer. Is fine, has excellent weld strength and rigidity, especially in the high temperature range of 50-80 ° C, has dimensional stability and chemical resistance. The above excellent properties can be obtained without depending on the size of the injection molding machine, the size of the molded product to be molded, or the residence time in the molding machine. The thermoplastic resin composition of the present invention can be suitably used for various parts, for example, parts for home electric appliances and parts for automobiles.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-198529 (JP, A) JP-A-3-227341 (JP, A) JP-A-60-260649 (JP, A) JP-A 64-64 75560 (JP, A) JP 6-55877 (JP, B2) (58) Fields surveyed (Int. Cl. ⁶ , DB name) C08L 23/00-23/36 C08L 25/04-25/14 C08L 63/00

Claims (1)

(57) [Claims] 1. The following components (A): 10-95 wt% and (B): 90-5 w
A thermoplastic resin composition obtained by melt-kneading t%. (A) Modified polyolefin alone or a mixture of polyolefin obtained by graft reaction of unsaturated carboxylic acid or anhydride with polyolefin, and the content of unsaturated carboxylic acid or anhydride functional group Is 3 to 1,000 mmol / kg, melt flow rate (MFR) at 230 ° C and 2.16 kg load is 1 to 200 g / 10min
What is. (B) an epoxy group-containing aromatic vinyl polymer having an epoxy group content of 50 to 1,000 mmol / kg, alone or as a mixture with an epoxy group-free aromatic vinyl polymer And the content of the epoxy group as the whole of the component (B) is 50 to 1,000 mmol / kg, 230
Melt flow rate (MFR) at 2.16kg load at 1 ℃
5 ~ 200g / 10min.