JPH04331112A - Method of molding thermoplastic resin-composition - Google Patents

Abstract

PURPOSE:To obtain the thermoplastic resin-composition excellent in heat resistance, light exposure properties and chemical resistance by injection-molding specified hydrogenated norbornane resin (component A), rubber polymer and 1 or the thermoplastic resin except the component A under specified condition. CONSTITUTION:The hydrogenated norbornane resin (component A) made by hydrogenating the polymer obtained by meta-polymerizing at least one kind of norbornane derivative expressed by formula I shown thesis or an unsaturated cyclic compound capable of copolymerizing with the derivative, rubber polymer and/or the thermoplastic resin (component B) except the component A, are prepared. The thermoplastic resin-composition containing the component A of 50-100wt.% and the component B of 50-0wt.% is injection-molded in the condition of a mold temperature of (Tg-70 deg.C)-(Tg+10 deg.C)(Tg: glass transition temperature), a resin-temperature of 280-360 deg.C and a rate of strain of 5X10<2>-2X10<4>sec<-1>. In the formula, m is zero or 1, and A, B are hydrogen atom or the terminal of prime number 1-10 or hydrogen radical.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a method for molding a thermoplastic resin composition, and more specifically to a method for molding a thermoplastic resin composition containing hydrogenated norbornene resin as a main component to exhibit excellent physical properties. It relates to a molding method for.

0002

[Prior Art] A resin with excellent thermal stability (hydrogenated norbornene resin ) is, for example, JP-A-1
This method has been proposed in, for example, Japanese Patent No. -240517. This hydrogenated norbornene resin has excellent heat resistance and light resistance, but has poor chemical resistance, so it is used for automobile parts, electrical/electronic equipment, and OA equipment parts, and is painted to improve its appearance. In this case, defects such as surface roughening may occur, and the product may not be put to practical use.

0003

[Problems to be Solved by the Invention] The present invention has been made in view of the problems of the prior art, and it is an object of the present invention to provide a molded article made of a thermoplastic resin composition containing norbornene resin as a main component, with excellent heat resistance and light resistance. The purpose of the present invention is to provide a molding method that can impart properties such as durability and chemical resistance.

0004

[Means for Solving the Problems] The present invention provides a thermoplastic resin composition containing 50 to 100% by weight of the following component (A) and 50 to 0% by weight of the following component (B).
70°C to Tg + 10°C (Tg is glass transition temperature), resin temperature 280 to 360°C, and injection speed (X) expressed below as 5 x 102 to 2 x 104 (sec-
The present invention provides a method for molding a thermoplastic resin composition, which is characterized by injection molding under the conditions of 1). Component (A); Hydrogenated product obtained by hydrogenating a polymer obtained by metathesis polymerizing at least one norbornene derivative represented by formula 1 or an unsaturated cyclic compound copolymerizable with the norbornene derivative Norbornene resin.

[Formula, m is 0 or 1, A and B are hydrogen atoms or hydrocarbon groups having 1 to 10 carbon atoms, X' and Y are hydrogen atoms or hydrocarbon groups having 1 to 10 carbon atoms, - (CH2
)nCOOR1, -(CH2)nOCOR1
, -(CH2)n CN, -(CH2)n CON
R2 R3, -(CH2)n COOZ, -(CH
2)n OCOZ, -(CH2)n OZ, -(C
H2) n W, or composed of X' and Y. Note that R1, R2, R3 and R4 are hydrocarbon groups having 1 to 20 carbon atoms, Z is a hydrocarbon group, and W is SiR.
5 p D3-p (R5 is a hydrocarbon group having 1 to 10 carbon atoms, D is -OCOR5 or -OR5, p is 0 to
3), n represents an integer of 0 to 10. ] Component (B): a rubbery polymer and/or a thermoplastic resin other than component (A). Injection speed: Here, the injection speed is the strain rate (X) when the molten resin passes through the gate, and is expressed by the following formula. (a) When the gate is rectangular: X=6Q/WH2 [In the formula, Q is the outflow amount (cc/sec), W is the width, and H is the thickness. (b) When the gate is circular, X = 4Q/πR3 [In the formula, Q is the same as in (a) above, and R represents the radius. ]

First, (A) hydrogenated norbornene resin will be explained.
In order to improve the heat resistance of the resulting molded product, at least one of the substituents X' and Y is preferably a group other than a hydrogen atom and a hydrocarbon group. . Further, it is preferable that one of the substituents X' and Y is a carboxylic acid ester represented by the formula -(CH2)nCOOR1 in that it does not change during the hydrogenation step during resin production, and the other one is a hydrogen atom. Alternatively, a hydrocarbon group is preferable in that the water absorption of the resin does not become high. Also, -(CH2)n COO
Among the carboxylic acid ester groups represented by R1, those with a smaller n are preferable because the heat resistance of the hydrogenated norbornene resin increases, and in particular, those with the formula -(CH2)n COOR1
In the above, it is preferable that n is 0 from the viewpoint of synthesizing the compound and the stability of the hydrogenated norbornene resin. R1 is an aliphatic, alicyclic, or aromatic hydrocarbon group having 1 to 20 carbon atoms, and it is preferable that the larger the carbon number, the lower the water absorption of the hydrogenated norbornene resin obtained. Thermal decomposition properties generally increase as the number of carbon atoms increases, so in order to make the most of the characteristics of the resin, it is necessary to use a chain hydrocarbon group having 1 to 4 carbon atoms, an alicyclic hydrocarbon group having 5 or more carbon atoms, Alternatively, a phenyl group or a substituted phenyl group is preferable, and further, as the compound, m is 1, 8-methyl-8-methoxycarbonyltetracyclo[4
．． 4.0.12,5. 17,10]-3-dodecene is preferred.

The polymer can also be a copolymer by using two or more compounds represented by the general formula (I). For example, 8-methyl-8-methoxycarbonyltetracyclo[4.4.0.12,5. 17,10]-3-dodecene and 5-methyl-5-methoxycarbonylbicyclo[2
．． 2.1]-2-heptene can also be copolymerized. In this combination, 5-methyl-5-methoxycarbonylbicyclo[2.2.1]-2-heptene is replaced by 8-methyl-8-methoxycarbonyltetracyclo[4.4.0
．． 12,5. 17,10]-3-Dodecene is particularly preferred because it can be obtained as an intermediate for the production of dodecene. Moreover, the general formula (I
) Other monomers copolymerizable with the compound represented by are cyclopentene, cyclohexene, cycloheptene,
Cyclooctene, pentacyclo [6.5.1.13,6
．． 09,7. Examples include cycloalkanes such as 09,13]-11-pentadecene and alkyl substituted products thereof. When using other copolymerizable monomers to obtain a copolymer with the compound represented by general formula (I), if the amount of this compound is small, the final resin obtained will have high heat resistance. Therefore, the proportion of the compound represented by general formula (I) is 50 mol% or more, preferably 70 mol% or more, and more preferably 80 mol% or more.

In addition, the polymerization of the compound represented by the general formula (I) can be carried out by adding carbon to the main chain of polybutadiene, polyisoprene, styrene-butadiene copolymer, ethylene-propylene-nonconjugated diene copolymer, polynorbornene, etc. It can also be carried out in the presence of an unsaturated hydrocarbon polymer containing -carbon double bonds; in this case, the resulting hydrogenated norbornene resin has particularly high impact resistance. Among these unsaturated hydrocarbon polymers, styrene-butadiene copolymer and styrene-isoprene copolymer are preferred because transparent molded products can be easily obtained. In this case, the styrene and diene copolymer may be a random copolymer or a block copolymer. When polymerizing in the presence of an unsaturated hydrocarbon polymer, the amount of the polymer is 1 to 50% by weight, preferably 3 to 40% by weight, more preferably 5% by weight, based on the compound represented by general formula (I). ~30% by weight is used.

The polymer used in the present invention has a weight average molecular weight of 20,000 to 700,00 in terms of polystyrene.
0, preferably 30,000 to 500,000. Examples of the metathesis polymerization and hydrogenation of the polymer to obtain the polymer include methods similar to those described in JP-A-1-132626. The hydrogenation rate of the hydrogenated norbornene resin thus obtained is 60M
Measured by Hz NMR and calculated from the reduction of the peak in the range of δ = 4.5 to 6.0 ppm due to hydrogenation reaction, usually 50% or more, preferably 70% or more, more preferably 80% or more, especially Preferably it is 90% or more, and 50%
If it is less than %, not only will the thermal stability of the hydrogenated norbornene resin decrease, but also its physical properties will change, making it impossible to reliably exhibit good properties. The gel content of the hydrogenated norbornene resin used in the present invention is 1% by weight or less, preferably 0.1% by weight or less, more preferably 0.05% by weight or less, and the water content is 300ppm or less, preferably 1
00 ppm or less, and the halogen content is 50 ppm or less, preferably 20 ppm or less.

Next, the component (B) used in the present invention is:
It is a rubbery polymer and/or a thermoplastic resin other than the component (A). Here, the rubbery polymer used as component (B) is a polymer having a glass transition temperature of 0° C. or lower, and includes ordinary rubbery polymers and thermoplastic elastomers. Examples of this rubbery polymer include ethylene-α-olefin rubbery polymer; ethylene-α-
Olefin-polyene copolymer rubber; Copolymers of ethylene and unsaturated carboxylic acid esters such as ethylene-methyl methacrylate and ethylene-butyl acrylate; Copolymers of ethylene and fatty acid vinyl such as ethylene-vinyl acetate; Ethyl acrylate Polymers of alkyl acrylates such as butyl acrylate, hexyl acrylate, 2-ethylhexyl acrylate, and lauryl acrylate; polybutadiene, polyisoprene, styrene-butadiene or styrene-isoprene random copolymers, acrylonitrile-butadiene copolymers Polymer, butadiene-isoprene copolymer, butadiene-(meth)acrylic acid alkyl ester copolymer, butadiene-(meth)acrylic acid alkyl ester-acrylonitrile copolymer, butadiene-(meth)acrylic acid alkyl ester-
Examples include diene rubbers such as acrylonitrile-styrene copolymers; butylene-isoprene copolymers, and these may be used alone or in combination. Further, the rubbery polymer may be one obtained by crosslinking the above-mentioned rubbery polymer using a known crosslinking agent such as divinylbenzene. The rubbery polymer made of the rubbery polymer has a Mooney viscosity (ML1+4, 100°C) of 5 to 200.
It is preferable that

Further, as the thermoplastic elastomer used as the rubbery polymer, for example, styrene-butadiene block copolymer, hydrogenated styrene-butadiene block copolymer, styrene-isoprene block copolymer,
Styrene-isoprene block copolymers, aromatic vinyl-conjugated diene block copolymers such as hydrogenated styrene-isoprene block copolymers, low-crystalline polybutadiene resins, ethylene-propylene elastomers, styrene graft-ethylene-propylene elastomers, Examples include thermoplastic polyester elastomer and ethylene ionomer resin. Preferred rubbery polymers for obtaining molded articles with particularly preferred transparency and sharpness are hydrogenated styrene-butadiene random copolymers, block copolymers, or block-random copolymers, Styrene content is 20-45% by weight
Copolymers of butadiene and acrylic esters, in which the weight ratio of butadiene to acrylic esters is 10 to 90:90 to 10, and 100 parts by weight of these copolymers contain styrene and/or acrylonitrile. Examples include those copolymerized in a proportion of 0 to 30% by weight, and hydrogenated products thereof. The rubbery polymer is modified with specific functional groups such as epoxy groups, carboxyl groups, hydroxyl groups, amino groups, acid anhydride groups, and oxazoline groups for the purpose of improving compatibility with (A) hydrogenated norbornene resin. It may also be a modified one. By containing the rubbery polymer as component (B), the final molded product can have even better impact resistance and ductility.

The thermoplastic resin used as component (B) is a thermoplastic resin other than component (A) and is a polymer having a glass transition temperature of 25° C. or higher, including an amorphous polymer and a crystalline polymer. Includes polymers, liquid crystal polymers, etc. Specific examples of thermoplastic resins include polyolefin resins, rubber-reinforced styrene resins, styrene resins, vinyl chloride resins, acrylic resins, polyphenylene ether resins, polyarylene sulfide resins, polycarbonate resins, polyester resins, polyamide resins, Examples include polyether sulfone resin, polysulfone resin, and polyimide resin. Among these, polyolefin resins useful in the present invention include polypropylene, and rubber-reinforced styrene resins include AB
S resins, AES resins, AAS resins, MBS resins, and resins using hydrogenated aromatic vinyl-conjugated diene block copolymers instead of butadiene rubber in the ABS resins and MBS resins. In addition, styrene resins include polystyrene, polychlorostyrene, polyα-methylstyrene, styrene-acrylonitrile copolymer, styrene-methyl methacrylate copolymer, styrene-maleic anhydride copolymer, and styrene-α
-methylstyrene copolymer, styrene-α-methylstyrene-methyl methacrylate copolymer, styrene-α-methylstyrene-acrylonitrile-methyl methacrylate copolymer, etc., which may be used alone or Two or more types can be used in combination. By containing the thermoplastic resin as component (B), high fluidity and excellent molding processability can be imparted to the final molded product.

In the present invention, the proportion of component (A) in the thermoplastic resin composition is 50% by weight or more, preferably 60% by weight or more, more preferably 70% by weight or more, and therefore the proportion of component (B) is 50% by weight or less. If the proportion of component (A) in the thermoplastic resin composition is less than 50% by weight, the heat resistance or light resistance of the finally obtained molded article may decrease.

The thermoplastic resin composition of the present invention may further contain commonly used additives, if necessary. The additives include antioxidants, such as 2,
6-di-t-butyl-4-methylphenol, 2-(1
-methylcyclohexyl)-4,6-dimethylphenol, 2,2-methylene-bis-(4-methyl-6-t-
butylphenol), tris(di-nonylphenyl phosphite); UV absorbers such as pt-butylphenyl salicylate, 2,2'-dihydroxy-4-methoxy-benzophenone, 2-(2'-dihydroxy-4
'-m-octoxyphenyl)benzotriazole; lubricants such as paraffin wax, silicone oil, stearic acid, hydrogenated oil, stearamide, methylene bisstearamide, m-butyl stearate, ketone wax, octyl alcohol, hydroxystearic acid triglyceride ; flame retardants, such as antimony oxide, aluminum hydroxide, zinc borate, chlorinated paraffins, tetrabromobutane, hexabromobenzene, tetrabromobisphenol A; antistatic agents, such as stearamidopropyl dimethyl-β-hydroxyethyl, ammonium; colorants such as titanium oxide, carbon black; fillers such as calcium oxide, clay, silica, glass fibers, glass spheres, carbon fibers; pigments, etc.

The thermoplastic resin composition used in the present invention is prepared using a mixer such as a single-screw extruder, a twin-screw extruder, a Banbury mixer, a kneader, or a mixing roll.
It is obtained by mixing the components (A) to (B) and further additives used as necessary. An example of a method for producing the thermoplastic resin composition used in the present invention is to mix each component in a mixer, then use an extruder to
A method for obtaining granules by melt-kneading at 50 to 350°C, and a simpler method include a method for obtaining a composition by directly melt-kneading each component in a molding machine.

[0015] The present invention is to obtain a molded article having excellent performance without distortion by molding the thermoplastic resin composition thus obtained using an injection molding machine under specific conditions. . Here, the specific conditions mean that three conditions, mold temperature, resin temperature, and injection speed, are set to specific conditions. That is, the mold temperature is the glass transition temperature (Tg) of the thermoplastic resin composition -50°C to Tg +10
℃, preferably Tg-30℃ to Tg+10℃. Note that when the thermoplastic resin composition has two or more Tg's, the Tg of component (A) is used. Mold temperature is Tg-
If the temperature is below 50°C, chemical resistance deteriorates, while Tg+10
If the temperature exceeds ℃, it becomes difficult to take out the molded product from the mold without deforming it. The mold temperature is determined by the heat distortion temperature (°C) of the resin composition (HDT; ASTM D648, 26
(HDT-40) to (HDT
+20) (°C), more preferably (HDT
-25) to (HDT+20) (°C). In addition, the resin temperature during injection molding is 280 to 360°C, preferably 360°C.
00 to 350°C, more preferably 310 to 340°C. If the resin temperature is less than 280°C, the fluidity of the resin will be low, molding distortion will occur, and chemical resistance will deteriorate. On the other hand, if the resin temperature exceeds 360°C, the thermal stability will be poor, and the appearance and chemical resistance of the resulting molded product will deteriorate. Furthermore, in the molding method of the present invention, the injection speed is set within a specific range. Here, the injection speed is expressed by the strain rate (X) when the molten resin passes through the gate, and is a value calculated using the following formula. (a) When the gate is rectangular: X=6Q/WH2 [In the formula, Q is the outflow amount (cc/sec), W is the width, and H is the thickness. (b) When the gate is circular, X = 4Q/πR3 [In the formula, Q is the same as in (a) above, and R represents the radius. ] The range of strain rate (X) defined in this way is 5
×102 to 2×104 (sec-1), preferably 1×103 to 1×104 (sec-1). If the strain rate (X) is less than 5 x 102 (sec-1), poor appearance will occur and chemical resistance will decrease. On the other hand, when the strain rate (X) exceeds 2 x 104 (sec-1), chemical resistance deteriorates. Control of strain rate (X) is
This is done depending on the injection speed, injection pressure, gate shape and gate area. In addition, when molding is performed by changing the injection speed in multiple stages, more than half of the molded product is at the above strain rate (X).
You can mold it with

[0016]

[Examples] The present invention will be explained in more detail below with reference to Examples, but the present invention is not limited to the following Examples. In the examples, parts and percentages are based on weight unless otherwise specified. Further, various measurements in the examples are as follows. Glass transition temperature (Tg) of the compound (thermoplastic resin composition)
) Measured using a differential scanning calorimeter (DSC) at 20° C./min. Heat resistance heat distortion temperature (HDT) was measured on a 1/2" thick test piece according to ASTM D648. Light resistance QUV (Suga Test Instruments) was used to irradiate for 100 hours, and the degree of discoloration (ΔE) was measured. A constant strain of 1 was applied to the center of a chemical resistance test piece (5″ x 1/2″ x 1/8″).
% was immersed in ethanol or toluene and the time until it cracked was measured. The appearance of the molded product was visually evaluated, and ○ was evaluated as good, and × was evaluated as poor.

Reference Example (A) Preparation of Component (A)-1 (Hydrogenated norbornene resin) Production: In a reaction vessel purged with nitrogen gas, a specific monomer represented by the formula 2, namely 8 -Methyl-8-carboxymethyltetracyclo[4.4.0.12,5. 17,10]-3-
500g of dodecene and 2,00g of 1,2-dichloroethane
0ml, 3.8g of 1-hexene as a molecular weight regulator, and a concentration of 0.05mol/tungsten hexachloride as a catalyst.
91.6 ml of a chlorobenzene solution of 0.1 mol/l, 68.7 ml of a 1,2-dichloroethane solution of paraldehyde with a concentration of 0.1 mol/l, and a solution of triisobutylaluminum with a concentration of 0.
．． Add 37 ml of 5 mol/l toluene solution and heat at 60°C.
By reacting for 10 hours at
450 g of a polymer with h 0.56 dl/g (in chloroform, 30° C., concentration 0.5 g/dl) was obtained. This polymer was dissolved in 9,000 ml of tetrahydrofuran and charged into a high-pressure reactor, and the palladium concentration was 5.
% palladium-alumina catalyst was added, hydrogen gas was charged so that the pressure was 100 kg/cm2, and 1
A hydrogenation reaction was carried out at 50°C for 5 hours. After the hydrogenation reaction, the catalyst was filtered off, and the solution was poured into a large excess of methanol acidified with hydrochloric acid to obtain hydrogenated norbornene resin (A)-1. The hydrogenation rate of this hydrogenated norbornene resin (A)-1 is substantially 10
0%, and the refractive index (nD 25) was 1.511.

[Chemical formula 2] Preparation of component (B) Production of (B)-1 (hydrogenated block copolymer); ■ Into an autoclave with an internal volume of 5 L, 2,500 g of degassed and dehydrated cyclohexane and 100 g of styrene were charged. ,
9.8 g of tetrahydrofuran and 0.2 g of n-butyllithium were added, and isothermal polymerization was performed at 50° C. (first stage polymerization). After the polymerization conversion rate reached approximately 100%, polymerization was carried out at 70°C while continuously adding a mixture of 325 g of 1,3-butane and 75 g of styrene at a rate of 75 g per 10 minutes (second stage). step polymerization). ■After the polymerization conversion rate of the added monomer reached almost 100%, the reaction solution was cooled to 70°C, and 0.6 g of n-butyllithium and 2
, 0.6 g of 6-t-butylcresol, and 0.28 g of bis(cyclopentadienyl) titanium dichloride.
Add 1.1 g of diethyl aluminum, and add 1.1 g of hydrogen gas.
．． The hydrogenation reaction was carried out for 1 hour while maintaining the pressure at 0 kg/cm2. Next, the reaction solution was cooled to room temperature and taken out from the autoclave, and then the solvent was removed by steam stripping and dried with a roll at 120°C to obtain the following hydrogenated block copolymer (B)-1. Ta. Total bound styrene content (%)

35 Ratio of first stage polymer block to total copolymer (%)
20 Vinyl bond content (%) of butadiene moiety in block copolymer 40 Hydrogenation rate (
%)

98 Molecular weight (×104)

16 Melt flow rate (230℃, 5kg)
30
Refractive index (nD 25)

1.515(B)-2; Polypropylene [manufactured by Mitsubishi Yuka Co., Ltd., BC-8] was used.

Examples 1 to 10, Comparative Examples 1 to 4 (A)
-1 component according to the formulation shown in Table 1, 50 mm
Pellets were prepared by melt-kneading using a φ extruder. The pellets are molded using an injection molding machine [manufactured by Toshiba Machine Co., Ltd.].
IS-125A], injection molding conditions were changed as shown in Table 1 to prepare test pieces, and the physical properties were evaluated. The results are shown in Table 1. Examples 11-12, Comparative Example 6 Regarding the (A)-1/(B)-1 ratio shown in Table 1, test pieces were produced under different injection molding conditions and their physical properties were evaluated. The results are shown in Table 1. Examples 13-14, Comparative Examples 7-8 Regarding the (A)-1/(B)-2 ratio shown in Table 1, test pieces were produced under different injection molding conditions and their physical properties were evaluated. The results are shown in Table 1. As is clear from Table 1, in Examples 1 to 14, molded products with excellent heat resistance, light resistance, and chemical resistance were obtained. On the other hand, Comparative Example 1 has poor chemical resistance because the mold temperature is below the lower limit. Comparative Example 2 has poor chemical resistance because the resin temperature is below the lower limit. Comparative Example 3 has poor chemical resistance because the resin temperature exceeds the upper limit. Comparative Example 4 has poor chemical resistance because the strain rate exceeds the upper limit. Comparative Example 5 has poor chemical resistance because the strain rate is below the lower limit. Comparative Example 6 has inferior heat resistance, light resistance, and chemical resistance because component (B)-1 exceeds the upper limit. Comparative Example 7 is (B
)-2 components exceed the upper limit, resulting in poor heat resistance and light resistance. In Comparative Example 8, the mold temperature was too high and no molded product could be obtained.

[0019]

[Table 1]

[0020]

[0021]

[0022]

Effects of the Invention The present invention produces molded products with excellent heat resistance, light resistance, and chemical resistance by injection molding a thermoplastic resin composition containing hydrogenated norbornene resin as a main component under specific conditions. Obtainable. The molded products obtained by the present invention have extremely high industrial value as automobile parts, electric/electronic parts, and OA equipment parts.

Claims (1)

[Claims] Claim 1: A thermoplastic resin composition containing 50 to 100% by weight of the following component (A) and 50 to 0% by weight of the following component (B) is heated at a mold temperature of Tg -70°C to Tg +10°C (
However, Tg is glass transition temperature), resin temperature 280-3
60℃ and the injection speed (X) shown below is 5×10
A method for molding a thermoplastic resin composition, characterized by injection molding under conditions of 2 to 2 x 104 (sec-1). Component (A); Hydrogenated product obtained by hydrogenating a polymer obtained by metathesis polymerizing at least one norbornene derivative represented by formula 1 or an unsaturated cyclic compound copolymerizable with the norbornene derivative Norbornene resin. [Formula, m is 0 or 1, A and B are hydrogen atoms or C1-C10 hydrocarbon groups, X' and Y are hydrogen atoms, C1-C10 hydrocarbon groups, - (CH2)nC
OOR1, -(CH2)nOCOR1, -(CH
2)n CN, -(CH2)n CONR2 R3
, -(CH2)n COOZ, -(CH2)n
OCOZ, -(CH2)n OZ, -(CH2)n
In addition, R1, R composed of W, or X' and Y
2, R3 and R4 are hydrocarbon groups having 1 to 20 carbon atoms, Z is a hydrocarbon group, W is SiR5 p D3-p (
R5 is a hydrocarbon group having 1 to 10 carbon atoms, D is -OCOR
5 or -OR5, p is an integer from 0 to 3), n
represents an integer from 0 to 10. ] Component (B): a rubbery polymer and/or a thermoplastic resin other than the component (A). Injection speed: Here, the injection speed is the strain rate (X) when the molten resin passes through the gate,
It is expressed by the following formula. (a) When the gate is rectangular: X=6Q/WH2 [In the formula, Q is the outflow amount (cc/sec), W is the width, and H is the thickness. (b) When the gate is circular, X = 4Q/πR3 [In the formula, Q is the same as in (a) above, and R represents the radius. ]