JPS63125562A - Heat-resistant and impact-resistant resin composition - Google Patents

Abstract

PURPOSE:To provide a resin compsn. having a high heat distortion temp. and excellent impact resistance, consisting of a specified after-imidated resin and a specified graft copolymer resin or a polycarbonate resin. CONSTITUTION:A resin compsn. consists of 30-80pts.wt. thermoplastic resin (A) having an imidation ratio of not lower than 70mol%, obtd. by imidating a copolymer having [eta]>0.40, composed of 94-45mol% of a styrene monomer, 1-20mol% of acrylonitrile monomer and 5-35mol% of maleic anhydride monomer, with cyclohexylamide in the presence of a zinc chloride catalyst in a molten state, and 70-20pts.wt. graft copolymer resin (B) obtd. by graft- copolymerizing 80-40wt% monomer mixture of a styrene monomer and acrylonitrile monomer in the presence of 20-60wt% rubbery polymer (e.g., polybutadiene) or 70-20pts.wt. polycarbonate resin (C). By blending the resin A having excellent heat resistance with the resin B or C, a material having a high heat distortion temp., excellent impact resistance and good moldability (melt fluidity) can be obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a resin composition that has a high heat distortion temperature and excellent impact resistance.

More specifically, the present invention uses a so-called post-imidized resin obtained by reacting a styrene, acrylonitrile, and maleic anhydride copolymer resin with cyclohexylamine, and a conventional AB
The present invention relates to a resin composition comprising an S-based resin or a polycarnate resin and having excellent heat and impact resistance.

(Prior art and its problems) As one of the methods to improve the heat resistance of ABS resin, a copolymer (hereinafter referred to as SMA) consisting of a styrene monomer and a maleic anhydride monomer (hereinafter referred to as SMA) is produced. Attempts have been made for some time to obtain modified ABS resins with improved heat resistance by blending them with ABS resins (Reference Document 1: Japanese Patent Publication No. 50775/1983).

However, SMA blended with ABS resin has an essential drawback of having a low thermal decomposition temperature, which has led to problems with retention stability during thermoforming.

Therefore, instead of SMA, we made a styrene/N-substituted maleimide copolymer (hereinafter referred to as SMI) and combined it with ABS.
Attempts have also been made to create a heat-resistant and impact-resistant resin composition with excellent molding stability by blending other resins, as described in Reference 2.
JP-A-57-125242 is one of them. However, in these documents, maleimide units include N-alkylmaleyl phenylmaleimide such as N-methylmaleimide, N-ethylmaleimide, N-isopropylmaleimide, N-butylmaleimide, N-arylmaleimide such as N-naphthylmaleimide, and various other types. N-substituted maleimides containing substituents are mentioned, but the most preferred one is N-substituted maleimide in all literature.
It is phenylmaleimide, and there are almost no examples in which maleimides other than N-phenylmaleimide have actually been investigated. Few references 3. N in Japanese Patent Application Laid-open No. 59-191749
- Examples of blends of SMI and ABS resins copolymerized using methylmaleimide monomers are also given in reference 4. In JP-A No. 58-129043, in a comparative example of the experiment, N
It merely discloses an example of blending SMI with -methyl and N-ethylmaleimide structures with ABS.

In general, copolymers of N-alkylmaleimide and styrene monomers have a high heat deformation temperature and high thermal decomposition temperature, and are excellent in thermal stability during molding, but they do not contain a nydistomer component and therefore have excellent thermal stability. It is common knowledge that impact resistance is inferior. For this reason, reference 4. Now, SMA is V-imidized with methylamine to obtain S containing N-methylmaleimide group.
When MI was blended with ABS resin and its performance was evaluated, its heat distortion temperature was low, so S
It is reported that when an attempt was made to improve heat resistance by changing the blend ratio of MI and ABS resin, the impact strength decreased. In summary, it was found that SMI containing an N-alkylmaleimide structure has low heat resistance even when blended with ABS resin, and does not have sufficient practical performance as a heat-resistant material.

On the other hand, SMI resin and polycarnate resin (hereinafter pc
Blend resin compositions are also known, specifically described in reference document 5. JP-A-53-129245 or reference documents 6.0SP 4, 160, and 792 correspond to this. In this document, the SMA is 125° to 2
Heat treatment using an aqueous methylamine solution or the like in a temperature range of 00°C followed by vacuuming to evaporate the reaction product and blend the imidized copolymer obtained as a residue with ordinary PC to determine the tensile modulus and flexural modulus by pc. We offer new and improved materials.

By the way, only ammonia water was used as the primary amine which was the imidizing agent at this time, and the obtained SM
Blends of I and PC have extremely low impact resistance, almost regardless of their composite composition, and it is difficult to say that this material is sufficient as a housing material for automobiles, home appliances, and OA equipment.

(Means for Solving the Problem) In order to meet the technical background described in the previous section and the market demand for high-performance resin composite compositions, the present inventors developed SMI
We worked hard to study the combination of ABS resin, SMI resin, and PC. As a result, a styrene-acrylonitrile-maleic anhydride acid copolymer containing acrylonitrile monomer (hereinafter referred to as AN) as an essential component as a third component monomer instead of SMA (hereinafter the first letter of each component is (spelled as SAMA) is imidized in the melt with cyclohexylamine in the presence of a zinc chloride catalyst (hereinafter referred to as SAMI, with the abbreviation MA for maleic anhydride replaced by MI for cyclohexylmaleimide). is used as a blend material, and the composite composition obtained by blending this with ABS resin or PC has a good balance of heat resistance and impact resistance that cannot be obtained in the above-mentioned literature, and also has good moldability (melt flowability). The present invention was achieved by discovering that this material can be made into a material that is

That is, the present invention has the following features: 1. (a) Consisting of 94 to 45 mol % of styrene monomer, 1 to 20 mol % of acrylonitrile monomer, and 5 to 35 mol % of maleic anhydride monomer [η:]>0. The copolymer of No. 40 was imidized with cyclohexylamine using zinc chloride as a catalyst in the melt, and the imidization rate was 70.
30 to 80 parts by weight of a thermoplastic copolymer resin having a molecular weight or higher and 80 to 40 parts by weight of a styrene monomer and acrylonitrile monomer in the presence of 20 to 60 parts by weight of a rubbery polymer. %'t Graft copolymer resin or polycarbonate resin formed by graft copolymerization 70~
A heat-resistant and impact-resistant resin composition of 20 parts by weight is provided.

In the present invention, the thermoplastic copolymer resin (a) used (i.e. S
AMI) means a copolymer consisting of a styrene monomer-acrylonitrile monomer unit and a small amount of maleic anhydride monomer unit. This copolymer is a copolymer (hereinafter referred to as SAMA) consisting of 94 to 45 mol % of styrene monomer, 1 to 20 mol % of acrylonitrile monomer, and 5 to 35 mol % of maleic anhydride monomer. , a copolymer with an intrinsic viscosity [η) (measured at MEK 30°C) greater than 0.4, which is an index of the degree of polymerization, and cyclohexyl A heat-resistant resin with a cyclohexylmaleimide structure in the polymer main chain, which is diimidized by a so-called post-imidization reaction of a polymer and has an imidization rate of 70 molti or more during the reaction as an amine limide mixture. It is.

Manufacturing method (polymerization method) of SAMA, which is the raw material for SAMI
There are no particular restrictions on this, but since aqueous emulsion or suspension polymerization may cause hydrolysis of maleic anhydride, batch solution polymerization may be replaced by bulk polymerization or continuous bulk polymerization may be adopted. can.

Polymerization can be carried out by starting the initial charge mixture consisting of styrene, acrylonitrile, and maleic anhydride monomers at a temperature of 70 to 120 °C under the flow of an inert gas such as nitrogen or by using a radical initiator. can. During polymerization, it is desirable to add the maleic anhydride monomer in portions during the polymerization period in order to distribute the maleic anhydride units as uniformly as possible in the polymer chain. Otherwise,
The number of alternating copolymer chains of styrene and maleic anhydride increases, resulting in poor thermal decomposition stability of the copolymer. Detailed technical content in this case is described in reference document 7, Japanese Patent Application Laid-Open No. 59-6253.

The reason for limiting the copolymerization composition of SAMA used as a raw material is that if the styrenic monomer exceeds 94 moles, the resulting SAMI will not have high heat resistance, so it will not become a heat-resistant material when blended with ABS or PC.

When the styrene monomer content is less than 45 molt, fluidity during thermoforming becomes poor. The styrene monomer referred to herein mainly refers to styrene itself, but it is possible to replace a portion of styrene with homologues such as α-methylstyrene and p-methylstyrene. (Hereinafter, the styrene monomer will be referred to as ST.) Next, the content of acrylonitrile monomer in SAMA is 1 to 1.
More preferably 5 to 20 moles is better than 20 moles. If the amount of acrylonitrile monomer (hereinafter referred to as AN) is 1 mole or less, it will have poor affinity with ABS and PC, which are the partner resins to be blended, and the resulting composition will have particularly low impact resistance. If it exceeds 20 molts, it is not preferable because it causes residual coloration and deterioration.

Furthermore, maleic anhydride monomer (hereinafter M
The reason why the content of A) is specified to be 5 to 35 mot% is because if it is less than 5 mot%, even if it is imidized, it will have poor value as a heat-resistant blend material. On the other hand, if the amount is 35 molt or more, the heat resistance will be high, but the melt flowability of the single substance will be poor, and even when it is made into a composition, it will be disadvantageous in terms of stability during thermoforming and cycle-up.

Next, the polymerization degree index of the raw material SAMA [η] was set to 0.40.
SAMA below this value is defined as larger.
So, even if the degree of polymerization is too low and imidization is performed with high efficiency,
The degree of polymerization of the obtained SAMI is the same as or slightly lower than that of the raw material SAMA, and as a result, SAMI is only a fragile resin with a low degree of polymerization.

Therefore, it is necessary that [η] of the raw material SAMA be greater than at least 0.4.

In the present invention, the imidization reaction is carried out at a temperature in the range of 180 to 260°C, that is, in a molten state, using zinc chloride (Z n C12), which is a Lewis acid, as an imidization catalyst, and n-alkylamine or n-alkylamine as an imidization agent. Using nclohekynylamine, which has more steric hindrance than aniline, it can be compared with imide with high efficiency! I have a ¥f mark.

Reference 8. The post-imidization reaction described in JP-A No. 57-55901 mainly targets imidization with aniline or alkylamine using a solution method, and depending on these methods, cyclohexylamine or tertiary -butylamine or 2,3.6-)
So-called sterically hindered amines such as ribromoaniline and amines whose basicity is lowered due to electron-withdrawing substituents have extremely low imidization rates and are virtually difficult to imidize.

In the present invention, the reason why the imidization reaction is limited to the molten state is that the catalyst zinc chloride reacts with methyl ethyl ketone, etc., which is commonly used in imidization after the solution method as a solvent for the raw material SAM, and becomes ineffective. 6D because there is a risk, and SAMI which is a reaction product because no solvent is used.
This is because the process of isolating and purifying can be omitted.

The reason why zinc chloride, which is a partial Lewis acid, is used as a catalyst is that in the imidization reaction, the conversion from the intermediate maleamic acid copolymer to the imide form is a dehydration ring-closing reaction.
This is because it was found to have a high catalytic effect.

In the imidization reaction, the imidization rate is the value shown by, and the imidization rate is high for a heat-resistant resin material. The higher the ratio, the higher the heat resistance of SAMI and the higher the decomposition stability during ripening, which is advantageous.

However, as mentioned above, with amines with large steric hindrance such as cyclohexylamine and tertiary-butylamine, the imidization rate is only 30% at most in the conventional imidization method, and imidization is ineffective in this case. . Only by the production method described in the present invention can the imidization rate be increased to 70 or more.

In addition, this not only improves the heat deformation temperature than pSAMA, but also improves the decomposition stability during thermoforming, making it suitable for ABS and P.
This makes it a suitable blend material for CK. If the imidization rate is less than 70 molar, the heat resistance will not improve much and the thermal stability will be insufficient.

The graft copolymer resin used in the present invention is a thermoplastic resin obtained by graft polymerizing a monomer mixture consisting of a styrene monomer and acrylonitrile in the presence of a rubbery polymer. The rubbery polymer mentioned here is most commonly polybutadiene, but other polymers such as styrene-butadiene copolymer rubber (SBR), acrylic rubber, and ethylene-proflene copolymer rubber can also be used.

The composition of the monomer mixture consisting of the rubbery polymer, styrene monomer, and acrylonitrile in the graft copolymer resin can be arbitrarily selected, but it is important to consider the impact resistance and processability of the final composition. A ratio of 20 to 60% by weight of the rubbery polymer and 80 to 40% by weight of the monomer mixture is desirable. As mentioned above, the styrene monomer is mainly composed of styrene, but it is possible to replace a part of it with α-methylstyrene or p-methylstyrene. On the other hand, there are no particular restrictions on the ratio of styrene monomers (hereinafter simply referred to as styrene) and acrylonitrile in the monomer mixture, but considering compatibility with the blend material SAMI (styrene/acrylonitrile) It is desirable to control the ratio within a weight ratio range of (50 to 80 to 150 to 20).

There are no particular restrictions on the method for producing the present graft copolymer, and it may be produced by any conventional emulsion polymerization, suspension polymerization, solution polymerization, bulk polymerization, or bulk suspension polymerization.

The polycarbonate used in the present invention generally refers to a so-called bisphenol A type polycuff & nate resin (hereinafter referred to as PC) represented by a repeating structural unit produced by a phosgene method or a transesterification method.

The number n of combs is suitably about 30 to 120.

The composition of the present invention can be produced by mixing an imidized thermoplastic resin and a graft copolymer resin or PC by a known method.

That is, mixing can be carried out by using a combination of powders, four pellets, or a combination of powders and pellets using a device such as a roll, a Banbury mixer, a kneader, or a -screw or twin-screw extruder.

In the present invention, the mixing ratio of the thermoplastic resin (,) and the graft copolymer or PC(b) is such that the thermoplastic resin (,) is 3
Preferably, the amount of graft copolymer or pc(b) is between 0 and 80 parts by weight and between 70 and 20 parts by weight. Thermoplastic resin(,)
If the amount is less than 30 parts, the composition will have low heat resistance and the desired composition will not be obtained, and there will also be problems in terms of cost and poor moldability. On the other hand, if the thermoplastic resin (a) exceeds 80 parts by weight, the composition will have improved heat resistance but will have low impact resistance and will only be brittle.

In addition, it is possible to mix well-known stabilizers, lubricants, colorants, antistatic agents, and other additives as necessary during mixing.

(Examples) Hereinafter, the present invention will be explained in more detail with reference to resin production examples and examples. Parts and parts in the examples are based on weight unless otherwise specified.

Performance evaluations of the copolymers and compositions described in the examples were conducted in accordance with the following method.

1. Heat resistance: Vicat softening point (Tvs) measurement JIS
Compliant with K-6870, load 1080 (9), heating rate 50°C/hr 2, impact resistance: DuPont falling weight impact test (xsd,) W
A weight of (kg) is dropped from a height h (crn), and the lowest value at which more than half of the 20 samples do not crack is l5dp = W x h (kg” cm )3, melt fluidity: Melt flow rate (MFR) Measured with melt indexer (JIS K-6870) Conditions = 230°C
5 kfl load 1ull Production Example 1) Synthesis of N-cyclohexylmaleimide copolymer Polymerization of maleic anhydride copolymer 50 parts of styrene, 7 parts of acrylonitrile and 0.9 part of Ω-imaleic anhydride were added to the initiator lausal peroxide. 0
．． 1 part and 20 parts of methyl ethyl ketone were dissolved and charged into a reaction tank, and the temperature inside the tank was maintained at 75° C. and sufficiently stirred. The polymerization reaction was stopped when the mixture was reacted with the mixture, and a maleic anhydride copolymer was obtained. A portion of the reaction solution was sampled and the amount of polymer was measured to determine the polymerization rate, which was 53%.

In addition, the same method as described above was carried out except that the composition of the monomers to be blended was changed, and maleic anhydride copolymer SAMA 1
~5 was polymerized. The polymerization results are shown in Table 1.

The composition of each unit in the copolymer was calculated based on the results of elemental analysis and alkaline titration of acid anhydride groups.

Table-1 Book 1) [η) = tim ηsp/eC→O (measured in MEK at 30°C) Production Example 2 N-cyclohexylmaleimide structure-containing copolymer (SA
MI) stainless steel 300ml with synthetic stirrer and temperature sensor
SAMA- synthesized in Production Example (1) in the autoclave of
1 (styrene = 81.8 mot%, acrylonitrile =
11.0 mot%, maleic anhydride = 7.2 m
ot%, measured at MEK 30°C [η) = 0.60
) (0.073 mol as maleic anhydride units) and 8.0 parts of cyclohexylamine as the primary amine.
73 parts (1.2 times the mole of MAR) and 12.0 parts of zinc chloride as a catalyst (1.2 times the mole of MAR) were charged at the same time and replaced with nitrogen, then sealed and placed in an oil path. The temperature inside the crepe was raised. The reaction was started when the temperature was raised, and the mixture was heated and stirred for 2 hours. In order to analyze the reaction-completed layer and product, a part of the contents was dissolved in methyl ethyl ketone, and this solution was reprecipitated in methanol to dry the white primer.

According to alkaline titration and elemental analysis, the nocyclohexylmaleimide unit in this polymer contains 5.8 moles of unreacted M
The AR unit was 1.2 mol, and the imidization rate was 79 mol.

The properties of the obtained imidized resin e are shown in Table 2.

Note that the same experiment was conducted for raw materials SAMA-i to 4 having different copolymerization compositions. However, the type and amount of amine used and the amount of catalyst were slightly varied depending on the amount of MAR units in SAMA. Table 2 shows the reaction results and the properties of the resin itself.
are summarized in

Production Example 3 Synthesis of N-methylmaleimide structural copolymer resin The same procedure as Production Example (2) was carried out except that methylamine was used instead of cyclohexylamine and SAMA-5 was used instead of SAMA-1. However, as methylamine, a 40% ethanol solution was used. The imidization rate was 90 molti, the highest among the production examples.

Production Example 4 Synthesis of N-phenylmaleimide structural copolymer resin Compared to the same experimental example of hexylamine (SAMI-1), the yield was slightly higher 8
It was 2 molti.

Production Example 5 Synthesis of imide structure copolymer resin by solution method SAMA-2
(11.7 moles of MA units), 0.9 parts of triethylamine, and 11.2 parts of cyclohexylamine (1.05 times molar equivalent to MA) were added to 20 parts of methyl ethyl ketone.
The mixture was dissolved in 0 parts and stirred at 140° C. for 7 hours in an autoclave after purging with nitrogen. After cooling to room temperature, the reaction solution was poured into 3,000 parts of strongly stirred methanol and dried separately. When the obtained copolymer was analyzed, the imidization rate was as low as 32 mol.

〔Example〕

Examples 1 and 2.3 Among the N-cyclohexylmaleimide structure-containing copolymer resins (SAMI) produced in Production Example 2, 60 parts each of SAMI-1, 2, and 3 shown in Table 2 were grafted together. ABS as a polymer (DP-611 manufactured by Japan Synthetic Rubber Co., Ltd.
40 parts (rubber content: 40%) were kneaded using a Prabender Grastograph at 220° C., 50 rpm, and 10 minutes. The obtained lump was cut into small pieces, and test pieces for evaluation were obtained by press molding. The pressing conditions were 8 molecules of heat and 2 minutes of pressure at 220°C. The melt fluidity was also evaluated using a melt indexer using the strips before pressing. The results are shown in Table 3. When the maleic anhydride unit number is within the range of the present invention and the imidization rate exceeds 70 molar, the physical properties of the blend with ABS are good. As the imide content increases from SAMI-1 to 3, the T'vs of the composition increases, while the ISd.

However, the balance is good.

Example 4 40 parts of SAMI-3 (sample with the highest MI content) obtained in Production Example 2 and 6 parts of ABS (DP-611)
A kneading experiment was conducted using a Brabender in the same manner as in Example 1 using 0 parts. The evaluation results are shown in Table 3, and the SAMI in the composition
It can be seen that even if the content is low, if the M content is high, a composition with a good balance of heat resistance and impact resistance can be obtained.

Example 5 A sample of SAMI-2 (with the lowest MI content) obtained in Production Example 2 was kneaded with a Brabender at a blending ratio of 70 parts ABS (DP-611) to 30 parts. The evaluation results of the obtained resin composition are shown in Table 3.
In the case of AMI, increase the SAMI content in the composition to improve heat resistance and
It can be seen that the balance of impact resistance can be maintained.

Example 6 This example uses ABS with a relatively low rubber content (D
This is the case when P-10: Column amount 25%) is selected as a blending partner. 60 copies of SAMI-2 DP-10 t-
Table 3 shows the evaluation results of a sample obtained by cross-wire and press-molding 40 parts of the sample. Although the impact resistance was slightly inferior to that of Example 2, the heat resistance was high and an excellent composition was obtained.

Comparative Example 1 Imidized sample after solution method according to Production Example 4 (imide mixture nearaniline) 60 parts of SAMI-4 ABS (DP-
After kneading 40 parts of 611), it was press-molded and its performance was evaluated. As shown in Table 3, when compared with Example 1, it is clear that the heat resistance of the post-imidized resin using aniline is inferior to that using cyclohexylamine.

Comparative Example 2 This is an example in which performance is insufficient if SAMI is too small in a composition of SAMI and ABS. A composition consisting of 120 parts of SAMI and 80 parts of ABS (DP-611) was evaluated similarly to the previous example. The results are shown in Table 3, but the heat resistance is poor and there is almost no effect of improving the heat resistance of ABS.

Comparative Example 3 Imidized sample with cyclohexylamine (SAM
In I), if the content of MA in the raw material SAMA is too low, it cannot become a heat-resistant material, and as is clear from Table 3, the composition of Production Example 2 with 60 parts of S&fI-6 and 40 parts of ABS Examples 7 and 8 This example shows the performance of a composition of SAMI and pc. (Mitsubishi Gas Chemical S-3000) 60 parts (Example 7) and SAMI-260 parts and PC 40 parts (Example 8)
Examples of two compositions are shown in Table 4. However, the blending conditions are 240°C x 50 rpm x 10 minutes, and the pressing conditions are 240°C.
C. x 8 molecules of heat and pressurized for 2 minutes. These samples were found to be excellent compositions with high heat resistance and impact resistance, high transparency, and better melt flow than PC alone.

The transparency evaluation in this section is based on a visual relative evaluation: ○ Good transparency, almost the same as SAMI alone △ Slightly poor transparency, but not cloudy × Classified as opaque or cloudy (phase separation) .

Example 9 &i As an example of a composition of SAMI-3 and PC having a high I content, a blend of SAMI-3/1'C=40/60 was evaluated and the results are shown in Table 4. This system also had well-balanced physical properties, particularly high heat resistance, and good transparency.

Comparative Example 4 The same procedure as in Example 7 was carried out using SAMI-4i, an imidized product of aniline, as SAMI in a SAMI/PC composition. The imidized product using aniline had slightly lower heat resistance than the imidized product using cyclohexylamine even though the imide group content was almost the same. This is A
The behavior was the same as the BS composition.

Comparative Example 5 The physical properties of a composition containing 40 parts of SAMI-5 and 60 parts of PC were evaluated and shown in Table 4. Even if the imidizing agent is cyclohexylamine, SAMI post-imidized by a solution method has a low imidization rate, so the heat resistance of SAMI itself is low, and therefore P
The heat resistance of the blend with C was also not satisfactory (see Table 4).

Comparative Example 6 The physical properties of a composition containing 760 parts of SAMI and 40 parts of PC were evaluated and shown in Table 4. When the imidization agent is methylamine, the imidization rate is quite high, but the heat resistance of the single substance is not very high (
SAMI-7 in Table 2) Therefore, the composition containing 760 parts of SAMI-7 and 40 parts of pc also had no characteristics compared to Example 8. Also, this SAMI-7/PC composition had poor transparency (see Table 4).

Comparative Example 7 This is an example of a composition in which the composition ratio of SAMI-1/PC was 90/10, but as shown in Table 4, the impact resistance was very low and it could not be a useful composition.

Example 10 The physical properties of a composition containing 30 parts of DP-10 with a low comb content and 70 parts of SAMI-3 as ABS were evaluated. Table -
The results are shown in 4, and the impact resistance is slightly lower, but on the contrary, AB
As an S resin system, it had a high degree of heat resistance and also had good melt fluidity.

Comparative Example 8 Table 4 shows the physical property evaluation results of a composition containing 90 parts of SAMI-2 and 10 parts of DP-611. It had low impact resistance and was unsuitable as a material.

[Reference example]

Table 5 shows performance evaluation data for the individual blending resins used in Examples and Comparative Examples.

Table 5 Umbrella 1) 230°C 5kg [Effects of the Invention] The SAMI/ABS composition obtained by the present invention has improved heat resistance and is more beneficial than SAMI/ABS obtained by conventional methods. It can be used as a new material for so-called high-rigidity flame-retardant resin compositions that are filled with glass fibers, etc., and can be used as an automotive interior material that requires high heat resistance, which is not compatible with ABS.

On the other hand, the conventional SMI/PC composition had very low impact resistance and was impractical due to lack of compatibility, but the composition of the present invention showed this in practical examples. SAM/PC which has good impact resistance and has good climbing performance.
I found out that it can be made with the composition.

Claims (1)

[Scope of Claims] 1. (a) Consisting of 94 to 45 mol% of styrene monomers, 1 to 20 mol% of acrylonitrile monomers, and 5 to 35 mol% of maleic anhydride monomers [η]>0 .40 copolymer was imidized with cyclohexylamine using zinc chloride as a catalyst in a molten state, and the imidization rate was 70 mol%.
In the presence of 30 to 80 parts by weight of the above thermoplastic resin and (b) 20 to 60% by weight of the rubbery polymer, 80 to 40% by weight of a monomer mixture consisting of a styrene monomer and an acrylonitrile monomer is added. Graft copolymer resin or polycarbonate resin obtained by graft copolymerization 70 to 20
Heat-resistant and impact-resistant resin composition consisting of parts by weight