JPS63128023A - Molded article of amide based resin and production thereof - Google Patents

Abstract

PURPOSE:To obtain the titled molded article having excellent mechanical properties at ordinary and low temperatures without deteriorating rigidity and changing dimensions, by blending specific components, e.g. an omega-lactam, polymerization catalyst, etc., injecting or pouring the resultant blend into a mold at a temperature above the melting point of the omega-lactam and molding the blend. CONSTITUTION:A polymerization catalyst is added to an omega-lactam and heated above the melting point of the omega-lactam to give a meltlike material. A polymerization cocatalyst is added to the omega-lactam and heated above the melting point of the omega-lactam to provide a meltlike material. An aromatic polyamide, soluble in the omega-lactam in the molten state and prepared by blending and dispersing a modified polyolefin is added to either one or both. Both are then blended and injected or poured into a mold and molded to provide the aimed molded article, having excellent heat resistance and surface external appearance and suitable as automotive parts, etc. Furthermore, the above-mentioned aromatic polyamide is preferably a polycondensate of dicarboxylic acids with diamines and contains aromatic groups in either one or both of the dicarboxylic acids and diamines.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to an amide resin molded article and a method for producing the same. More specifically, it relates to a reaction injection molded product of amide resin and a method for producing the same, which has excellent mechanical properties at room and low temperatures, less decrease in rigidity and dimensional change due to water absorption, and a molded product with an excellent surface appearance. ,
The present invention relates to a manufacturing method thereof.

[Prior Art] In recent years, so-called reaction injection molding has been developed as a method for obtaining molded products by injecting or injecting highly reactive liquid raw materials into a molding die and then causing a polymerization reaction of the liquid raw materials after being injected into the mold. (
Reaction I njeetionMoldiB
, hereinafter simply referred to as rRIMj) has been proposed and is attracting attention.

The above RIM technology was previously put to practical use in the field of manufacturing molded products from polyurethane, and has made great progress, but recently it has also been applied to materials such as amide resins, unsaturated polyester resins, and epoxy resins. became. Among these, amide resins have excellent toughness, heat resistance, electrical properties, friction resistance, wear characteristics, etc. Furthermore, because the raw material composition has good fluidity, it can be molded at low injection pressure. It has the advantages of being able to be molded from thin to thick molded products at will, having good transferability on the mold surface, and making it easy to carry out the polymerization reaction as it generates little heat during polymerization. As a material for RIM. Attention has been paid.

However, amide resins have drawbacks such as insufficient impact resistance at low temperatures and high water absorption, which leads to severe decreases in rigidity and dimensional changes in molded products. As a method to improve these drawbacks, a method has been proposed in which a certain type of block copolymer is added to the amide resin (see Japanese Patent Publication No. 54-40120). However, according to this method, Although the impact resistance at low temperatures is improved, the rigidity decreases considerably, which is undesirable.Another method to improve the above drawback is to add filler to amide resin; Although it is possible to improve the stiffness and dimensional changes of molded products due to water absorption, impact resistance at low temperatures cannot be improved.

[Problems sought to be solved by the invention] The present invention provides an amide resin molded product obtained by RIM technology using ω-lactam as a raw material, which eliminates the above-mentioned drawbacks, and a method for producing the same. The purpose is to That is, the present invention has (1) excellent mechanical properties at room temperature and low temperature, (2) less decrease in rigidity and dimensional change due to water absorption, and (3) excellent surface appearance! )'M resin molded product and its manufacturing method.

"Means for solving the problem" However, the gist of the first invention of the present invention is that ω-
A mixture containing a lactam, a polymerization catalyst, a polymerization cocatalyst, a modified bilioolefin, and an aromatic polyamide soluble in the omega-lactam in a molten state is injected or injected into a mold at a temperature equal to or higher than the melting point of the omega-lactam. It is an amide resin molded product that is characterized by I4 that it is molded by

The gist of the second aspect of the present invention is an ω-lactam melt containing a polymerization catalyst (hereinafter referred to as component system (A)), an ω-lactam melt containing a polymerization co-catalyst (hereinafter referred to as “component system (A)”); An aromatic polyamide soluble in omega-lactam in a molten state in which a modified polyolefin has been blended and dispersed in advance is blended into at least one of the component system (B), and the above-mentioned component (A) and (B) are blended. The present invention provides a method for producing an amide-based tMN molded article, which comprises mixing components and injecting or injecting the mixture into a mold to form a molded article.

The present invention will be explained in detail below.

The amide resin molded article that is the subject of the present invention contains a mixture of a modified polyolefin and an aromatic polyamide soluble in omega-lactam in a molten state, and is a reaction product of the omega-lactam, a polymerization catalyst, and a polymerization cocatalyst. It becomes more.

Specific examples of ω-lactams used in the present invention include γ
-butyrolactam, δ-parerolactam, C-caprolactam, ω-enantholactam, ω-capryllactam, ω-undecanolactam, ω-laurinlactam, and the like. These ω-lactams may be used alone or in combination of two or more.

The polymerization catalyst used in the present invention may be any compound selected from those used in the known 7-ion polymerization of ω-lactams.

Specific examples include alkali 4, alkaline earth metals, their hydrides, oxides, hydroxides, carbonates, alkyl compounds, aryl compounds, alkoxides, Grignard compounds, and the above metals or metal compounds. ω-
The amount of the polymerization catalyst used is 0.01 to 15 or 20 mol% based on the total ω-lactam, which is a reaction product with lactam, such as sodium salt, potassium salt, magnesium halide salt, etc. of ω-lactam. Apparently it's more than that.

The polymerization cocatalyst used in the present invention may be any compound selected from those used in the known 7-ion polymerization of ω-lactams. Specific examples thereof include toluene noisocyanate, 4, 4°-nophenylnotane diisocyanate, hexamethylene diisocyanate, polymethylene polyphenyl polyisocyanate,
Incyanates such as quidicyanate modified with carboimide, hexamethylene-1,6-biscarbamide, caprolactam, N,N'-7enyl-p-7enylenebiscarbamidcabrolactam, N,N'- Diphenyl-P-phenylenebiscarbamide, carbamide lactams such as pyrrolidone, tele-7taloyl chloride,
Acid halides such as 7 nopic acid chloride and sepacic acid chloride, °7 noboyl biscaprolactam, adipoyl bispyrrolidone, tele7 taloyl biscabrolactam,
polyacyl lactams such as teralyl bis-bis-lidone, iso-7-al biscaprolactam, iso-7 taloyl bispyrrolidone, or formula 1, where A is halogen or ren); is an integer of 1g±1.2 or 3, b is an integer of 1* or more, and R1 is an alkyl group, an aralkyl group, an alkyloxy group, an aryloxy group, a halogen group, or an aralkyloxy group. , R2 is a divalent or higher group selected from a hydrocarbon group and a hydrocarbon having an ether bond, and Z is a structure that can be used to polish a compound having a polyvalent hydroxyl group, amide group, mercapto group, or evoquine group. or a lactam-functional material selected from the group consisting of: 1
etc.

Examples of compounds having polyvalent hydroxyl groups include alkylene glycols such as queethylene glycol, triethylene glycol, tetraethylene glycol, tetramethylene glycol, propylene glycol, dipropylene glycol, hexylene glycol, and 1,3-propantool. , 1,3-hexaneol, butylene glycol, 1,4-phthanol, dicyclopentadiene glycol, heptaethylene glycol, isopropyritine bis(P-phenylene glycol)
, polyols other than fullkylene glycol such as glycerol, pentaerythritol, 1,2,6-hexanetriol, 1-trimethylolpropane, polymeric polyols such as polyethylene glycol, polypropylene glycol, polyoxypropylene nool, and triols, polyols, etc. Examples include tetramethylene glycol, castor oil, polybutadiene glycol, polyester glycol, poly(ε-caprolactone) diol, and a number of compounds containing substituents other than hydroxy groups, such as 2,4-cycloa-butylene glycol.

Compounds with polyvalent fulcapto groups include hydroxyethylthioglycolate, ethylene glycol bis(thio-glycolate), pentaerythritol tetrakis-(thioglycolate), and thioglycol. Compounds include hexamethylene diamine, tolylene diamine, 2,4-noethyl tolylene diamine, polyoxyethylene quamine,
Polyoxypropylene diamines and triamines, polyoxypropylene diamines, copolyamides with 7 amino terminal groups, etc. are mentioned, and compounds with polyvalent epoxy groups include resorcinol digrecinol ether, diglycidyl ether of bisphenol A, etc. , vinyl cyclohexane oxide, butanol glycinole ether, polyglycyl esters of polycarboxylic acids, epoxidized polyolefin and glycidyl ether resins, epoxy novolac resins, and the like.

Furthermore, in the present invention, compounds that do not substantially inhibit the polymerization reaction, such as plasticizers, blowing agents, dyes and pigments, antioxidants, internal mold release agents, etc., can also be blended.

In the present invention, the modified polyolefin, together with the aromatic polyamide soluble in omega-lactam in the molten state described below, gives the molded article 1livI resistance at low temperatures, reduces the water absorption of the molded article, and reduces the water absorption. This serves to improve rigidity reduction and dimensional change.

Modified polyolefins include ethylene, propylene,
It is a copolymer that may contain a-olefins such as butene-1, isoprene, and imbutylene, and in some cases tsene such as butadiene, hexadiene, norbornatsuene, and contains 0.01 to 1.0% by weight of maleic anhydride. Examples include those that have been grafted with. Furthermore, it is a copolymer of ethylene and a, β-unsaturated carboxylic acid such as acrylic acid or methacrylic acid, and 0 to 100 mol% of the carboxylic acid contained in the copolymer is sodium, lithium, potassium, or calcium. Alternatively, those neutralized by metal ions such as zinc can also be mentioned. These may be used alone or in combination of two or more.

Examples of aromatic polyamides soluble in omega-lactam in a molten state include polycondensates of 2N or higher aromatic dicarboxylic acids selected from aromatic dicarboxylic acids and diamines. A condensate that combines such compounds is
It is soluble in omega-lactam in a molten state, and has the function of improving the mechanical properties of amide resin molded products at low temperatures and preventing deterioration of physical properties due to water absorption.

Examples of aromatic nocarboxylic acids include terephthalic acid, isophthalic acid, methylterephthalic acid, methylisophthalic acid, dimethylterephthalic acid, trimethylisophthalic acid, naphthalenedicarboxylic acid, biphenyldicarboxylic acid, bis(carboxyphenyl)propane, and nophenyl ethernocarboxylic acid. Examples include ponic acid. Among these, terephthalic acid and isophthalic acid are preferred.

Examples of cyamines include ethylene diamine, tetramethylene diamine, hexamethylene diamine, octamethylene diamine, decamethylene diamine, ivy renzamine, parakylene diamine, 4.4゛-diaminodicyclohexylmethane, 3゜3゛-tsumethyl-4 , 4'-noaminohexyl/tan, etc. Among these, hexamethylene diamine and 4,4'-diaminodicyclohexylmethane are preferred.

The aromatic polyamide can be produced by a conventionally known method by selecting a combination of the aromatic dicarboxylic acid and the 77mines.

In order to produce the amide resin molded article according to the present invention, the modified polyolefin is blended and dispersed in the aromatic polyamide in advance.The amount of the modified polyolefin blended into the aromatic polyamide is the sum of both amount to 10
It can be selected from 0 to 1% to Sog amount %. If the weight of the modified polyolefin exceeds 50% by weight, the aromatic meliamide becomes insoluble in the omega-lactam in the molten state, which is undesirable. It is preferable to select by weight.

In order to disperse modified polyamide in aromatic polyamide, it is sufficient to weigh a predetermined amount of both, tri-blend it to form a mixture, then apply high shear force to this mixture and knead it in a molten state. According to experiments conducted by the inventors, modified polyolefin dispersed in aromatic polyamide is preferably used in a two-wheeled extruder, for example. Set the diameter to 0.
It has been found that a range of 1 to 3 μm is best.

Next, a method for producing an amide M resin molded article according to the present invention will be explained. First, a polymerization catalyst is added to ω-lactam, and ω
- lactam melting, α or higher (e.g., ω-lactam is C-
In the case of caprolactam, the mixture is heated to 70° C. or higher) to prepare a molten ω-lactam containing a polymerization catalyst (referred to as component system (A)).

Similarly, a polymerization cocatalyst is added to the ω-lactam and heated above the melting point of the ω-lactam to prepare a molten ω-lactam containing the polymerization cocatalyst (referred to as component system (B)).

Next, a modified polyolefin is blended into at least one of the component system (A) and the component system (B), and an aromatic polyamide soluble in the dispersed omega-lactam in a molten state is blended therein. The blending amount of the aromatic polyamide in which the modified polyolefin is dispersed is 1 to 50% by weight when the total amount of the component system (A), the component system (B), and the aromatic polyamide in which the modified polyolefin is dispersed is 100% by weight. You can select by weight range. Among these, it is preferable to select a weight of 15 to 40%. Component system (A) or component system (B)
may contain other additives, such as crosslinking agents, modifiers,
A plasticizer, colorant, antioxidant, etc. are blended to form a molding composition. In addition, when the aromatic polyamide in which the modified polyolefin is dispersed is blended into both the component system (A>) and the component system (B), the distribution ratio is 1! of the ω-lactam.
It is determined on a case-by-case basis depending on the viscosity of the component system (A) and the component system (B).

Subsequently, component system (A) and component system (B) in a molten state are mixed at a constant ratio, and the resulting mixture of molding compositions is injected or injected into a mold.

In this case, the mixing ratio of component system (A) and component system (B) is:
Depending on the purpose of the molded product and the properties to be provided, the component system (A)
/component system (B) volume ratio is preferably selected in the range of 571 to 115. To mix a two-component system, use a fluid mixing device such as an impingement mixer called a mixing head, a static mixer, or a dynamic mixer. It ends with what you do.

The temperature of the mold when manufacturing molded products is 100-200℃
, preferably in the range of 120 to 160°C.If the temperature of the molding mold is maintained within the above range, the polymerization reaction within the mold will proceed rapidly, and the mixture of the molding composition will After injection into the mold, a short time (usually within 2-4 minutes)
After the polymerization reaction is completed, the mold is cooled and the product taken out from the mold is the desired amide M resin molded product.

Component system (A) and component system (B) are preferably heated, mixed, poured, etc. while being sealed with an inert gas.
The inert gas used for sealing is partially contained in the melt and also in the molded product, which helps prevent sink marks on the molded product and improves the appearance of the molded product.

The amide resin molded products according to the present invention include vehicle parts such as outer panels of automobiles and snowmobiles, steering wheels, dash panels, instrument panels, cowl panels, cowl grilles, armrests, and bumpers;
Computer, word processor, typewriter
Housings and carrying cases for 0Afi devices such as terepinosin, sound VM devices, etc.; parts and housings for household electrical appliances; insulation materials for various other electrical devices, furniture parts, agricultural machinery parts, plastic pallets, plastic sheets, etc. can give. These examples are not intended to limit the invention.

"Effects of the Invention J The present invention, as explained above, has particularly remarkable effects as described below, and its industrial utility value is extremely large.

(1) When using the method of the present invention, at least one of the component system (A) and the component system (B) is blended with an aromatic polyamide soluble in omega-lactam in a molten state in which modified polyolefin is dispersed in advance. However, this was added ω
- Lactam melts have good fluidity and excellent stability, making them easy to handle and easy to inject into molds during molding.

(2) Since the amide resin molded article according to the present invention contains a modified polyolefin and an aromatic polyamide that is soluble in omega-lactam in a molten state, it has excellent mechanical properties at room temperature, and has excellent mechanical properties at low temperatures. It also has excellent impact resistance.

(3) Since the amide resin molded article according to the present invention contains a modified polyolefin and an aromatic polyamide that is soluble in omega-lactam in a molten state, water absorption is reduced, and therefore, rigidity is reduced due to absorption. And there is little dimensional change due to water absorption.

(4) The amide resin molded product according to the present invention is less likely to cause pinholes, voids, agglomeration of air bubbles, etc. on the surface of the molded product.
The molded product is free from unevenness caused by these factors and has an excellent appearance.

"Examples" Next, the present invention will be described based on Examples and Comparative Examples, but the present invention is not limited to the following examples unless the l!+f;

The aromatic polyamide soluble in omega-lactam (hereinafter simply referred to as [aromatic group nylon-AP Oj)] used in the following examples and which is in a molten state in which modified polyolefin is dispersed in advance is as follows. It is.

・Aromatic nylon-APOr: Ethylene, propylene and 1,4-butanoene in a weight ratio of 91:15:4.
Copolymer of 4-butanoene (crystallinity 20%, melt index (M!) 5g/10min (190℃)
terephthalic acid,
It is a product obtained by polycondensing inheptalic acid and hexamethylene diamine in a weight ratio of 33:17:50.
Using a 1:4 (weight ratio) mixed solution of cresol/chloroform as a solvent, weigh out an aromatic polyamide pellet having a number average molecular weight of approximately 10,000 as measured by GPC method in a weight ratio of 30:70. and mixed in a blender.

The obtained mixture was heated at 190°C, 200°C, 210°C, and 200°C from the hopper side to the goose side using a 50 mm twin-screw extrusion fi (TEM-50, manufactured by Arika Kikai Co., Ltd.).
The temperature was set at 20° C., and the screw speed was set at 220 rpm to form a pellet.The average particle diameter of the modified polyolefin dispersed in the aromatic polyamide was 0.
It is a 3μ plow.

・Aromatic nylon-APOll: Ethylene, butene-1 and 1,4-butanoene in a weight ratio of 81:14:S,
Copolymer consisting of 4-butanoene (crystallinity 20%, M
A modified polyolefin pellet grafted with 0.4% by weight of maleic anhydride, terephthalic acid, isophthalic acid and 4,
It is a polycondensation product of 4゛-7minocyclohexylmethane in an ffl ratio of 33:17:50, and has a number average molecular weight of about 1,500,000, measured in the same manner as the previous one. and polyamide pellets were weighed at a weight ratio of 30:70 and mixed in a blender.

The resulting mixture was kneaded into pellets under the same conditions as in the case of aromatic nylon-APOI using a 2-wheel extruder of 50 mm. The average particle size of the modified polyolefin dispersed in the aromatic polyamide is 0.3 μm.

・Aromatic nylon-APOIII: In the combination of aromatic nylon-APOI, aromatic nylon-APO■ was prepared in the same manner as in the case of preparing the same combination, except that the weight ratio of modified polyolefin/aromatic nylon was changed to 40/60. was prepared.

The average particle diameter of the modified polyolefin dispersed in the aromatic polyamide is 0.5 μm.

In addition, in the following example, the low-temperature impact resistance (Dupont impact value), whitening rigidity (III monoelasticity), water absorption expansion coefficient, porosity, appearance, etc. of the obtained molded product were determined as follows. It was evaluated.

・Low-temperature impact resistance (DuPont impact value) A test piece is cut out from the flat molded product obtained in the example or comparative example, and the test piece is saturated with moisture in an atmosphere of 23°C and 50% relative humidity. After absorbing moisture up to
After being left in a cold room at -30°C for 6 hours, the impact value was measured using a Devon impact tester in accordance with JIS K-5400. The diameter of the dart used at this time was 12.7+m, and the hole diameter of the test piece receiver was 12.7 mm.

・Bending stiffness (bending modulus) When injecting a molding composition into a mold from a flat molded product, two directions are used: one parallel to the direction in which the molding composition flows, and the other perpendicular to the direction in which it flows. Two types of test pieces were cut out. These test pieces were allowed to absorb moisture up to the saturation amount in an atmosphere of 23°C and 50% relative humidity, and then ASTM D
-790.

・Water absorption expansion coefficient A test piece with a length of 15 cm and a width of 2 C was cut out from an absolutely dry flat molded product, and the length (L) was accurately measured. This test piece was placed in an atmosphere of 50°C and 95% relative humidity for 4 hours.
Immediately after leaving it for 8 hours and taking it out, the length 1) was measured and calculated using the following formula.

・Porosity Cut a test piece from an absolutely dry plate-shaped molded product and conduct JI
Specific gravity was measured in accordance with SK-6911 and calculated using the following formula.

・Surface Appearance The surface of the molded product was mainly evaluated with the naked eye, but was supplementarily evaluated using a surface roughness meter (manufactured by Koita Research Institute, model SE, -3A).

The evaluation results were displayed in the following four stages.

0: Excellent, O: Good, Δ: Fair, ×: Bad Example 1 A component system (A) and a component system (B) having the following compositions were prepared in respective component system holding tanks, and the component system (A ) to 90
While maintaining the component system (B) at 130°C, each was sealed with 1 kg/am2 of nitrogen gas while stirring.

Component system (A) ε-caprolactam 27.3 wt% sodium pyrrolidone 0.7 Aromatic nylon-A
POI 8 Weight% component system (B) ε-caprolactam 37.5% by weight Tele7 Taloylbiscaprolactam 1.5 Aromatic nylon-A POI 25 77 Next, component system (B)
A) and component system (B) were heated vertically at 30° C. using a reaction injection molding machine and controlled at a temperature of 140° C. by an electric heater.
The molding composition was injected into the cavity from the date in the center of the vertical part and held for 2 minutes.

The mold was then cooled, opened, and the molded product was taken out to obtain the desired amide resin molded product.

Table 1 shows the physical property measurement results for the molded product obtained.

Comparative Example 1 A molded article was obtained in the same manner as in Example 1, except that the component system (A) and component X% (B) were each replaced with the following.

Component system (A) ε-caprolactam 35.3% by weight Sodium pyrrolidone 0.3 Component system (B) ε-caprolactam 52.5% by weight Tele7 taloyl biscaprolactam 1.5 〃Polypropylene glycol 10 〃(Molecular weight 2, 000) Table 1 shows the physical property measurement results for the obtained molded product.

Example 2 A molded article was obtained in the same manner as in Example 1, except that component system (A) and component system (B) were each replaced with the following.

Component system (A) C-caprolactam 25 heavy bromomagnesium caprolactam 3 Aromatic nylon-A
POI 81 as component system (B) C-caprolactam 37.5% by weight in7taloylbiscaprolactam 1.5 Aromatic nylon-APOI 25 1/The physical property measurement results for the obtained molded product are shown in Table 1. .

Example 3 A molded article was obtained in the same manner as in Example 1, except that component system (A) and component system (B) were each replaced with the following.

Component system (A) ε-caprolactam 28% bromomagnesium caprolactam 3 Aromatic nylon-A
POI 511 component system (B) -caprolactam 47.5% by weight in7taloyl biscaprolactam 1.5 Aromatic nylon, -APOI 15 # The physical property measurement results for the obtained molded product are shown in Table 1. .

Example 4 A molded article was obtained in the same manner as in Example 1, except that component system (A) and component system (B) were each replaced with the following.

Component system (A) ε-caprolactam 2°3% by weight Bromomagnesium caprolactam 3 Aromatic nylon-APOI 10.

Component system (B) C-caprolactam 32.5% by weight Iso7taloyl biscaprolactam 1.5 Aromatic nylon-A P O130//Table 1 shows the results of measuring the physical properties of the obtained molded article.

Example 5 In the example described in Example 2, aromatic nylon -AP
A molded article was obtained in the same manner as in the same example except that aromatic nylon-APOU was used in place of OI.

Table 1 shows the physical property measurement results for the molded product obtained.

Example 6 A molded article was obtained in the same manner as in Example 1, except that component system (A) and component system (B) were each replaced with the following.

Component system (A) ε-caprolactam 25% by weight Bromomagnesium caprolactam 3 Aromatic nylon-A
POT[[8# Ingredient system (B) ε-caprolactam 37.5 fold IL% iso7
Taloylbiscaprolactam 1.5 Aromatic Nylon-APOr[25# Table 1 shows the results of measuring the physical properties of the obtained molded product.

Comparative Example 2 A molded article was obtained in the same manner as in Example 1, except that the component system (A) and the first-part system (B) were replaced with the following. -Component system (A) C-caprolactam 47% by weight Bromomag book sium caprolactam 3 〃Component system (B) C-caprolactam 27.7% by weight Polymerization co-catalyst (X) 22,3 //Here, polymerization co-catalyst (X) ) is a compound represented by the following formula.

[However, Z is a polyether with a molecular weight of about 6,000, n is an integer of 2 or more, and the weighted average is 2.3
It is. ] Table 1 shows the physical property measurement results for the obtained molded product.

Comparative Example 3 A molded article was obtained in the same manner as in Example 1, except that component system (A) and component system (B) were each replaced with the following.

Component system (A) ε-caprolactam 38 Jokiya bromomagnesium caprolactam 2 Component system (B) ε-caprolactam 14.4% by weight Polymerization promoter (X) 15.6 // Mild 7T
Iper 30 The milled 7T Iper has a fiber diameter of 11 μm, an average fiber length of 150 μm, and a surface treated with γ-7/propyltriethoxysilane.

Table 1 shows the physical property measurement results for the molded product obtained.

Comparative Example 4 In the example described in Example 2, aromatic nylon-APO
Same example except that aromatic nylon (polycondensed with three components of terephthalic acid, isophthalic acid, and hexamethylene diamine in a weight ratio of 33:17:50) in which no modified polyolefin is dispersed was used instead of I. A molded article was obtained using the same procedure as in .

The physical property measurement results for the obtained molded article are shown in Section 1i.

Comparative Example 5 In the example described in Example 2, aromatic nylon, AP
Except for using ε-caprolactam instead of OI,
A molded article was obtained in the same manner as in the same example.

Table 1 shows the physical property measurement results for the molded product obtained.

\、 From Table 1, the following is clear.

(1) The amide resin molded product according to the present invention has excellent impact resistance at low temperatures (Examples 1 to 5, Comparative Example 1.
(see 3.4).

(2) The amide resin molded product according to the present invention has excellent rigidity in a water-absorbed state (Examples 1 to 5, Comparative Examples 1.2
．． (See 3.5).

(3) The amide resin molded article according to the present invention has a low absorption expansion coefficient and excellent dimensional stability (see Examples 1 to 5 and Comparative Example 1.2.3.5).

(4) The amide resin molded product according to the present invention has excellent surface appearance (see Examples 1 to 5 and Comparative Example 3).

(5) The amide 'PSa+resin molded product according to the present invention is excellent in all of the above-mentioned properties, and none of the comparative examples '' is excellent in all of the above-mentioned properties.

Applicant: Mitsubishi Monsanto Chemicals Co., Ltd. (Full text corrected) Ming lat Procedural amendment February 7, 1986

Claims (5)

[Claims] (1) A mixture containing an ω-lactam, a polymerization catalyst, a polymerization cocatalyst, a modified polyolefin, and an aromatic polyamide soluble in the ω-lactam in a molten state is molded into a mold at a temperature higher than the melting point of the ω-lactam. An amide resin molded product characterized by being molded by injection or injection into the interior. (2) The modified polyolefin contained in the amide resin molded product is 0.5 to 25% by weight based on the amide resin molded product.
The amide resin molded article according to claim (1), wherein the average particle diameter is in the range of 0.1 to 3 μm. (3) Claim (1) characterized in that the aromatic amide is a polycondensate of two or more aromatic dicarboxylic acids selected from aromatic dicarboxylic acids and diamines. The amide resin molded article according to any one of items (2) to (2) above. (4) Claims (1) to (2) characterized in that the aromatic polyamide contained in the amide resin molded product is 1 to 50% by weight based on the amide resin molded product. 3) The amide resin molded product according to any one of the items. (5) An ω-lactam melt containing a polymerization catalyst (hereinafter referred to as “component system (A)”) and an ω-lactam melt containing a polymerization co-catalyst (hereinafter referred to as “component system (B)”). A molten omega-lactam soluble aromatic polyamide in which a modified polyolefin has been blended and dispersed in advance is blended into at least one of the components, and the component system (A) and component system (B) are combined.
A method for producing an amide-based resin molded product, which comprises mixing the mixture with the following and injecting or injecting the mixture into a mold to obtain a molded product.