JPS58157803A - Injection molding composition - Google Patents

Abstract

PURPOSE:To provide the titled composition giving a molded article having excellent bending strength at high temperature and high heat resistance, by compounding a thermosetting resin with specific amounts of a phosphorus oxyacid salt compound and a filler. CONSTITUTION:The objective composition is prepared by mixing and dispersing (A) a thermosetting resin (e.g. phenolic resin) with (B) 5-250wt% (based on the thermosetting resin) of a phosphorus oxyacid salt compound of formula MOm/2. nP2O5 (M is metal including Si; m is atomic valence of M; n is 0.1-0.7) (e.g. silicon polyphosphate), (C) 15-200wt% of a filler (e.g. silica) and if necessary, (D) an internal mold release agent (e.g. zinc stearate). The sum of the components (B) and (C) is 20-250wt%.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an injection molding composition, and more particularly, mK is a thermosetting resin K. The present invention relates to a composition.

Conventionally, thermoplastic resins and thermosetting resins have been widely used as plastic molding materials, but one of the major drawbacks of these resin materials is that they have poor heat resistance compared to metal-based materials such as iron and aluminum. As a result, the scope of its application was limited.

That is, the thermal deformation temperature of thermoplastic resins generally used as molding materials is 180° C. or lower, and deformation occurs when used at higher temperatures. If the heat distortion temperature is 180°C or higher and the glass transition temperature is lower than 180°C, minute dimensional changes will occur if the glass is used for a long period of time at a temperature of 80°C or higher.

Furthermore, although thermosetting resins such as phenolic resins and unsaturated polyester resins have heat distortion temperatures of 190°C to 100°C or higher, they generate gas when placed under high temperature conditions after molding, resulting in chemical damage. It cannot be said that it is busy and stable (hereinafter referred to as exhibiting gas generation phenomenon). In other words, if a thermosetting resin molded body is subjected to surface treatments such as electrical equipment, vapor deposition, and sputtering without performing after-aging or post-curing, and then placed under high temperature conditions of approximately 110°C or higher, the surface of the molded body will deteriorate. This results in defects such as the loss of the gas generation phenomenon, the formation of paint surface pressure pinholes, the poor adhesion between the molded body and the paint, and the peeling of the vapor deposited layer. For example, when a reflector for a lamp is constructed using a novolak phenolic resin composition using hexamethylenetetramine as a hardening agent, or when the reflector is placed at a temperature of about 1fiO°C or higher, the deposited layer peels off and swells. (hereinafter referred to as the swelling phenomenon) occurs. Generally, reflectors for lamps are made by vacuum-depositing a metal such as aluminum on a paste-coated substrate made of iron plate or plastic, and then applying a top coat to protect the deposited surface. However, the above-mentioned blistering phenomenon occurs when gas generated from the substrate accumulates between the base coat and the gold i deposited layer, causing the deposited layer to peel off. In the same way, the condensation polymerization reaction that is the curing reaction when molding a thermosetting resin composition is incomplete, and unwarped components remain in the molded product after molding. It is presumed that one of the causes is that when the product is placed in the apparatus again under high temperature conditions, further condensation polymerization reaction occurs.

However, blistering occurs even when using unsaturated polyester, which undergoes an addition polymerization reaction in the curing reaction.This suggests that moisture or other volatile substances contained in the material may also be a source of gas generation. It will be done.

Moreover, the gas generation phenomenon leads to a decrease in strength at high temperatures. That is, even if a molded product is molded under high pressure during molding and has the required strength, its strength will decrease if it exhibits a gas generation phenomenon in the atmosphere for a long time. Generally, gas generation phenomena that cause problems in the surface treatment layer and decrease in strength can be eliminated to a certain degree by thoroughly performing after-aging or post-curing after molding. However, the blistering phenomenon seen in the rear lefter cannot be completely removed by after-aging.

Furthermore, since treatments such as after-aging require a long time and a lot of energy, there is a problem in that the cost of the product increases.

The present invention has focused on these conventional problems and as a result of research, it has been found that a composition suitable for injection molding can be obtained by combining a thermosetting resin with a specific amount of a phosphorus oxy-acid salt compound and a filler. It was confirmed that the above problems were resolved. That is, when a molded article is made using such a composition, the coexisting phosphorus oxy-acid salt compound promotes the condensation polymerization reaction of the thermosetting resin during molding, thereby reducing the amount of unreacted components remaining after 1 kK of molding.

This stabilizes against oxidation reactions at high temperatures after molding, and prevents gasification of moisture and other volatile components.Furthermore, by combining fillers, strength, bending strength and heat resistance under extremely high temperatures are improved. It has been discovered that an excellent molded article can be obtained, and the present invention has been achieved.

Therefore, in the present invention, a thermosetting resin is blended with a soxylate compound of 5 to 860% by weight based on the thermosetting resin and a filler of 16 to 800% by weight based on the thermosetting resin. , the total amount of phosphorus oxy-acid salt compound and filler is g
The present invention relates to an injection molding composition characterized in that it has an o-g2io weight. It is preferable to add an appropriate amount of internal mold release agent to the composition of the present invention in order to prevent mold release from a molding die when a molded product is produced. The composition of the present invention is obtained by mixing the above-mentioned constituent components into a light solution, has good heat resistance, and is suitable for injection molding.

Thermosetting resins used in the present invention include phenol resins, epoxy resins, furan resins, formaldehyde resins, ketone formaldehyde resins, area resins, melamine resins, and melasanophenol cocondensation resins. There are alkyd resins, modified phenolic resins, unsaturated polyester resins, diallyl phthalate resins, modified unsaturated polyester resins, and urethane resins, but phenolic resins and unsaturated polyester resins are more useful in terms of productivity, workability, and heat resistance. be. There are two types of phenolic resin: resol type and novolac type, but novolac type is suitable for molding. This is because the novolac type is manufactured by a two-step process, which makes it suitable for dry manufacturing methods, and it is relatively easy to control the reaction, making it easy to produce homogeneous products, curing quickly, and producing compositions with good flow. This is because the molded articles produced by this method generally have small shrinkage, high gloss, good mechanical strength, and good heat resistance. As a curing agent for the novolak type phenolic resin, in addition to hexamethylenetetramine, commonly used curing agents such as paraformaldehyde and epoxy can be used.

Since resol-type products are manufactured by a general method, it is difficult to control the condensation reaction, and storage neutralization also has the disadvantage that curing progresses, but if 1 is appropriately controlled during these steps, they can be used in the present invention. preferred. As the dry brix type unsaturated polyester, a mesothelium-responsive solid prepolymer to which a solid crosslinking agent such as diallyl phthalate prepolymer and a peroxide catalyst are added is used.

Diallyl phthalate prepolymer or diallyl isophthalate prepolymer can be used alone in the present invention by adding a peroxide catalyst, but
Generally, it is preferable to use it in combination with unsaturated polyester.

Examples of phosphorus oxy-acid salt compounds used in the present invention include silicon polyphosphate, alkali metal salts of silicon polyphosphate, titanium phosphate, zirconium phosphate-aluminum phosphate, calcium phosphate, magnesium phosphate, zinc phosphate, and barium phosphate. Various phosphates such as , lead phosphate, and sodium phosphate are used alone or in combination of two or more.

In these phosphates, the phosphoric acid component can exist in the form of orthophosphoric acid, metaphosphoric acid, pyrophosphoric acid, tripolyphosphoric acid, or other condensed phosphoric acids, but usually this phosphoric acid component is Preferably, it is present in a highly condensed form. The above-mentioned phosphate may be an acidic phosphate or a basic phosphate, and the ratio of the phosphoric acid content (p, o, M represents a metal including silicon, m represents the valence of the metal M, and n is 0.1 to 0.7, preferably 0.2 to 0.
・It can be varied over a wide range as long as it satisfies the following.

Among the phosphorus oxy-acid salt compounds, silicon polyphosphate or a metal salt thereof is particularly preferred, followed by aluminum polyphosphate or boron polyphosphate or a metal salt thereof.

If the phosphorus soxylate compound is less than 5% by weight based on the thermosetting resin, the effect of the above-mentioned addition K cannot be obtained sufficiently, and even if it is added in an amount greater than gso*t%, it will not be effective. Not only does the effect remain unchanged, but also the fluidity during molding deteriorates, and the surface precision of the molded product obtained using the composition deteriorates, so the amount added should be within the range of b to 160% by weight.

Next, the filler used in the present invention refers to a wide range of reinforcing materials, and fillers that are mainly inorganic are suitable. This is because organic materials generally have poor heat resistance themselves and often contain volatile components such as moisture. This is because it may have a negative effect on sexuality. However, wood flour, nokuru, etc. whose moisture content is sufficiently controlled can be used in the present invention. Inorganic filler and
These include clay, talc, silica, alumina, magnesia, titania, calcium silicate, diatomite, calcium carbonate, graphite, and carbon black.

There are mica, metals, etc., and the forms are powder, flakes, and fibers. It goes without saying that fibrous materials are suitable for increasing strength. In order to further improve the heat resistance of the molded article obtained by molding the composition of the present invention, it is effective to increase the thermal conductivity and to decrease the coefficient of linear expansion. This is because increasing the thermal conductivity not only promotes heat dissipation from the molded object, but also reducing the width of the temperature distribution in each part of the molded object, and decreasing the coefficient of linear expansion. This is because it is possible to improve the dimensional stability of the molded body. Carbon fibers or graphite fibers are most preferably used for this purpose, and glass fibers, glass powders, graphite powders, #1 elementary powders, etc. are preferably used. In order to smooth the surface of the molded product, it is preferable to use I-squid.

The amount of filler added is 15 to 200% based on the thermosetting resin.
It is important to keep it within the range of %.

Actually, the phosphorus soxylate compound has a function as a filler in addition to its function as a thermal stabilizer, so the amount of filler added should be determined by considering the amount of the phosphorus oxylate compound. Better decide. It is appropriate that the total amount of the phosphorus oxy-acid salt compound and the filler is 50% by weight of zO to s based on the thermosetting resin. If the total amount of the phosphorus oxy-acid salt compound and the filler is less than 80% by weight, the strength of the molded product obtained using the composition, especially the bending strength and heat resistance under high temperature conditions, will be insufficient, and the SSO weight will be insufficient. ~ More and more amount of filler alone! This is because if the amount exceeds 0,000% by weight, the fluidity of the composition during molding will deteriorate, resulting in poor moldability as well as the surface precision of the molded product obtained by molding.

As mentioned above, a phosphorus oxy-acid salt compound is added in an amount of 5 to 5% by weight based on the thermosetting resin.
It is particularly preferable to add 0% by weight.

This particularly increases heat resistance at 60% by weight or more, and 1
This is because if the ratio exceeds 1, the improvement in heat resistance will be small. In addition, within this range, there is an advantage that the phosphorus oxy-acid salt compound/substance is easily mixed uniformly with the thermosetting resin during blending, and the performance does not vary.

Further, the total amount of the phosphorus soxylate compound and the filler is preferably 110 to 180% by weight based on the thermosetting resin. This is because in this range, both the strength and the fluidity during molding are balanced and are the best.

As already mentioned, an internal mold release agent is generally added to the composition of the present invention in order to improve the edge shape during molding, and when added, it is・6～8
It is appropriate to use weight ~.

As the internal mold release agent, any general mold release agent can be used, but zinc stearate and calcium stearate are preferably used. Zinc stearate is most suitable for phenolic resins and unsaturated polyester resins due to their molding temperatures.

The composition of the present invention includes a predetermined amount of a phosphorus oxyacid salt heat stabilizer and a filler in the thermosetting resin, and 1! Depending on the conditions, an internal mold release agent may also be added, and it is extremely important to thoroughly mix these components to achieve a good dispersion state. The composition thus obtained is generally a molding material in a form that is easily fed to a molding machine in order to efficiently perform molding processing when producing a molded object. When processing by dry method, mix thoroughly using a mixer, ribbon blender, bubble blender, etc., then roll.

A common method is to knead the mixture using a co-kneader or the like, cool it to solidify, and then pulverize it from scratch, but it may also be heated and granulated at the same time as mixing using a Henschel mixer or the like. When processing by wet method, use a solvent after kneading.

It is important to remove moisture, etc. as much as possible. When using a wet premix, care should be taken to ensure that the phosphorus oxy-acid salt compound is sufficiently dispersed during crosstalk. The crosstalk is generally performed using a kneader.

When making a molded article using the composition of the present invention, an injection molding machine for thermosetting resin is applied, and a molding material of a predetermined shape formed from the composition as described above is applied to this molding machine. can be supplied to form a molded article in a desired shape. In this case, when a wet premix is used, a special device for forcibly feeding the composition to the injection molding machine is required. It is optional to perform Bostki air after molding.

The molded product obtained by injection molding in this manner can be used under high temperature conditions because the phosphorus oxy-acid salt compound in the composition effectively improves the thermal stability of the molded product. There is no phenomenon of gas generation, or even if there is, it is very small and the weight reduction rate is also small.

As described above, the composition of the present invention has good injection moldability and heat resistance because it is composed of a thermosetting resin containing a phosphorus soxylate compound and a filler in specified amounts as essential components. It is extremely excellent, and is extremely useful as a material for molded bodies that are to be used particularly under high temperature conditions.

The invention will be illustrated by the following examples and comparative examples.

In the Examples and Comparative Examples, a phosphorus oxy-acid salt compound produced by the method shown below was used.

(1) First, silicon polyphosphate was prepared in JP-A-56-50.
It was produced in accordance with the method described in the specification of No. 159 at temperatures below .degree.

E Commercially available sodium silicate (JIS Jl 1 item m Na5
O12,9'/ ,810 87.0"1oot
h ) directly using 100i1 fi to drop sodium silicate drop by drop into an aqueous sulfuric acid solution heated to 90'C at a concentration of 10%, and react on the so-called acidic side to form granular silica gel. sodium'
ions and sulfate ions, and wash the washing solution until substantially no neutralized sodium ions are observed.
Desoda-free silica hydrogel (water content 9L!i
%) was recovered.

For this silica hydrogel 9, commercially available phosphoric acid (Jl81
grade 86%, H, PO, specific gravity 1.69) as raw material with a proportion of silicate, and the molar ratio of phosphoric acid and silicic acid is PsO6/
Phosphoric acid and silica hydrogel were added and mixed at a ratio of 810° so that the molar ratio of After sufficiently drying with "C" (1
After firing for 1 hour at 91SO"C, the mixture was further classified using a mesh sieve at 200°C to obtain polysilicon polyphosphate (H8
-1) was created.

(b) As another silicon polyphosphate, silicon polyphosphate (H8-1) has a molar ratio of phosphoric acid and silicic acid of Pm.
0h/s 10. Except for adding and mixing phosphoric acid and silica hydrogel at a molar ratio of 0.5
Using exactly the same method as e-1), polysilicon polyphosphate (H
8-11) was created.

(8) Other phosphoric acid oxy-acid salt compounds include polysilicon sodium polyphosphate (H-1) manufactured by Mizusawa Chemical Industry Co., Ltd. by the method described in JP-A-66-1S0159; Silicon acid (T4) and aluminum polyphosphate (H-Jl) were converted into phosphoric acid oxy-acid salt compounds H8-8゜H8-4 and H8-, respectively.
I gave it a 5.

Example 1 Thermosetting resin binding °C novolac type phenolic resin powder (
EXZA-1O48 (manufactured by Dainippon Ink Co., Ltd.) was selected, silicon polyphosphate (H8-1) was selected as the phosphorus oxy-acid salt compound, and Kazen 7 Eyeper Chop (manufactured by Kureha Chemical Industry Co., Ltd., M-) was selected as the filler. 10?T)
and glass powder (Nittobo Co., Ltd., PFA
101) was selected.

First, the above phenolic resin powder iKI, 1 piece of polysilicon phosphate, 1 piece of carbon fiber chop. l confront.

The 5th order of glass powder g, sb, zinc stearate (Zinc Stearate manufactured by NOF Corporation)) 100f,
The composition obtained by thoroughly mixing the mixture in a Henschel mixer heated to about 0°C in advance is immediately transferred to a Henschel mixer maintained at a temperature in another chamber and mixed while cooling, to form about 10 noodles of granular molding material. I got it.

This molding material was injection molded under the following conditions to obtain a diameter of IQQII.
I+, thickness 4 cod, density approximately 1.6'/-8F) A disk-shaped flat plate was obtained and used as a raw material.

Mold temperature 190°C Cylinder temperature Front 90°C Rear
S0℃ Pull-out pressure 10019 8-hole rotation speed 36 r, pm Curing time
Nine pieces of this material were subjected to surface treatment using the first method for 90 seconds to produce a reflector.

As the varnish for the pace coat, polyester (UE-8 manufactured by Nippon Oil & Fats Co., Ltd.) and incyanate (Coronet L manufactured by Takeda Pharmaceutical Co., Ltd.) were selected as varnishes with a molar ratio of incyanate groups and alcohol groups of N0010H.
After spray painting the above material with an additive mixture of 1 (thickness approximately 10 prb),
Baking was performed at C for about 1 hour. After vacuum-depositing aluminum to a thickness of approximately 0.1 μm using a vacuum evaporation device (manufactured by Tokuda Seisakusho Co., Ltd.) on this pace-coated material at a vacuum degree of approximately 4×10-″mH, a clear top coat (NOF) was applied. manufactured by AL-8) and spray-painted at 80°C.
Bake for about 80 minutes and then bake the reflector (R-1).
I got it.

This reflector (R-1) & C was subjected to various physical property tests shown below, and the results are shown in Table 1.

Total light reflectance Measured using a dual reflection/transmittance needle (manufactured by Murakami Color Research Institute, HR-100).

Bending strength M/fat”): JIS K 691
It was measured according to the method described in 1.

Thereafter, the reflector (R-1) was left to neutralize for 3 hours in an oven kept at 5100"CK, and then left at room temperature (approximately 10°C).
), and the presence or absence of thermal deformation and blistering was visually observed, and then the total light reflectance (9), bending strength, and dimensional change (6) weight change were measured and calculated. These results are also shown in Table 1.

Comparative Example 1 Silicon polyphosphate (H8-1) 1&# is not added,
Example except that glass powder was used instead of 4 and 5 o'clock]
A thermosetting resin composition was prepared in the same manner as above, and then a reflector (C-1) was prepared in exactly the same manner as the reflector (R-1) of Example 1, and the reflector (C-1) was prepared in the same manner as in Example 1. The results obtained are shown in Table 1.

Example 2 Resol type resin powder as thermosetting resin (Prior 7en TD-3! 117 manufactured by Dainippon Ink Co., Ltd.)
, selected phosphorus soxylate compound bound polysilicon polyphosphate (HE-1), and added calcium carbonate and tin lite mica (60S sold by Kuraray Co., Ltd.) as fillers.
I chose.

First, the phenolic resin powder go, polysilicon polyphosphate 1
A composition obtained by thoroughly mixing 6 components of L calcium carbonate 1 Kf, tin lite mica 2 Kf, and zinc stearate 1001 P in a Henschel mixer kept at about 80°C is transferred to another Henschel mixer kept at room temperature and cooled. The mixture was mixed while stirring to obtain a molding material in the form of rice grains. This molding material was injection molded under the following conditions to obtain a diameter of I Q Q wm.
, thickness 4■density 1. A disk-shaped flat plate of IS'/, 8 was obtained and used as a material.

Mold temperature 180'C Cylinder temperature Front 90'C Rear
50'C Injection pressure: 1100 degrees f3 Screw revolution speed: 56 rpm Curing time
This material was subjected to surface treatment for 110 seconds in the same manner as the reflector (R-1) of Example 1 to obtain a reflector (R-11). Example 1 for this reflector (R-g) VC
The results obtained are shown in Table 1.

Comparative Example 2 A thermosetting resin composition was prepared in the same manner as in Example 2, except that 60% of calcium carbonate was added without adding silicon polyphosphate, and then a lli' chaff-like molding material was made from it, and a reflector was prepared. A reflector (C,S) is manufactured in exactly the same manner as (R-11), and this reflector
Table 1 shows the results of various tests conducted on (c-g) in the same manner as in Example 1.

Example 3 16 parts of hexamethylenetetramine was added to a mixture of novolac-type phenolic resin (Mitsui Toatsu Chemical Co., Ltd. Mirex RN #8410 and Mirex RN: #9410 at a ratio of 7o:ao) as a thermosetting resin. composition), silicon polyphosphate (H8-1) was selected as the phosphorus oxy-acid salt compound, and carbon fiber chop (manufactured by Kureha Chemical Industry Co., Ltd.) was selected as the filler.

M]07T) and glass powder (PFA 101 manufactured by Nittobo Co., Ltd.) were selected.

First, to the phenolic resin powder 6, add #, 2.15 hours of silicon oxide, 2.6 hours of carbon fiber chop, 1 g of glass powder, ib7, and 100 hours of zinc stearate.
The six components of f were mixed under sufficient pressure in a Henschel Mikiner and then kneaded with eight rolls.The resulting composition was pulverized to obtain a molding material of about 18.ah.degree.

Using this pulverized molding material, injection molding was performed under the same conditions as in Example 1 to obtain a diameter IQQws and a thickness of 4s+s.

A disk-shaped flat plate with a density of 1.''/at' was used as the material.

This material was surface-treated in the same manner as the reflector (R-1) of Example 1 to obtain a reflector (R-1). Various tests similar to those in Example 1 were conducted on this reflector (R-8), and the results obtained are reported in the first part.

Comparative example 8 Polysilicon phosphate 1l-III is 80Of.

A thermosetting resin composition was prepared in the same manner as in Example 8 except that Glass Paradat 54 was used at 4.7 K@ instead.
After pulverization, a reflector (C-8) was manufactured in exactly the same manner as the reflector (R-8) of Example 8, and the same tests as in Example 1 were conducted on this reflector (C-8)K. The results obtained are shown in Table 1.

Table 1 Example 4 As shown in Table 3, thermosetting resin compositions were prepared by combining 5&C, a thermosetting resin, a phosphorus oxy-acid salt compound, and a filler in various combinations in different types and proportions. Using these compositions, six types of glue reflectors (R-4 to
R-9) was produced.

As a thermosetting resin, resol type phenolic resin (RF
), unsaturated polyester resin (
υp), the above (HB-1) to (H8-1s) were used as the phosphorus oxy-acid salt compounds, and carbon fiber (CF) was used as the filler.

Glass powder (GF), calcium carbonate (CA), mica (MA), graphite powder (GR), silica (8
engineering) was used. Further, as a mold release agent, zinc stearate was added by weight of 3 to 9 parts of the total amount.

In this way, the flefter (R-4) to (R
-9) The various tests shown in Example 1 were conducted on K, and the results are shown in Table 1.

Table 2 Examples A granular molding material was prepared from the same thermosetting resin composition as in Example 1 and injection molded to obtain a material for an alector for a headlamp as shown in FIG.

A base coat, aluminum vacuum deposition, and a top coat were applied to this material in the same manner as in Example 1 to produce a reflector (R-5). Konori 7 Rector (R
-5) was left under a temperature condition of 180° C. for 6 hours, but no thermal deformation, blistering phenomenon, decrease in reflectance, etc. were observed, and the weight loss rate was 0.15-. This was further left at a temperature of 200° C. for 2 hours, but no thermal deformation, blistering phenomenon 1, decrease in reflectance, etc. were observed, and the weight loss rate was 0.18-.

From the above results, since the composition of the present invention contains a phosphorus oxy-acid salt compound, the use of a material molded using this composition or the 7 Rector exhibits blistering phenomenon under high temperature conditions.1 Decrease in reflectance. It is understood that molded articles molded using the composition of the present invention do not generate gas, or even if gas is generated, it is extremely small.

Example 6 Eight types of powder resols manufactured by Asahi Organic Industry Co., Ltd. shown in Table 8 below were used as thermosetting resins.

Table 8 Phosphorus soxylate compounds (H8-1) to (H8
-8) and carbon fiber CCF as the filler.
) #Glass powder (GP), calcium carbonate (CA), mica (MA), and silica (8th grade) were used.

The above thermosetting resin, phosphorus oxyacid crystal compound, and filler were combined in different types and proportions as shown in Table 4, and calcium stearate was added as a mold release agent at 8% by weight of the total amount. Calcium oxide [ca(oH), ) as a hardening accelerator was added to 4% of the total amount by weight, and the mixture was thoroughly mixed in a Henschel mixer to obtain a composition. These compositions were kneaded at 100"C for 10 minutes in a three-honda ball with no plating on the surface, a sample was taken in the middle of the mixer, and the diameter was approximately 110111 using the disk method (6911 in JI8). The flow characteristics of the molding material obtained by kneading the material until it passed through a 1 m sieve were measured and are shown in Table 4.

, 41st! ! The medium flow performance was measured as follows: (1) As shown in Fig. 3, the sample sot was placed in the upper mold l and heated at 150°C at 1615°C.
'/(Press the sample into the spiral mold of the lower mold 8 with a pressure of 1, I, ignore the white part number, and spiral molded product (
The length of glossy part) 8 was determined as lj.

1ii) Sample 5g according to the method of disk JI8 K-fl il l 1? ] Pressure 86K9 at 60℃
/C1l'' to make a disk-shaped molded body, and its outer diameter was measured.

1ii) KF (manufactured by Shimadzu Corporation, Koka Type 70-Tester) k
Therefore, sample 14t was heated to 800Q/l at a temperature of 100'C.
The maximum flow rate (KF-V) (''/sec) when the sample was melt-extruded with a plunger at a pressure of yn'' was measured.

The flow characteristic values suitable for injection molding are as follows.

Therefore, the total amount of phosphorus oxy-acid salt compound and filler is!
R-10 to R-18 in the range of 0-160% by weight of I can be fully injection molded, but more than 250% by weight of C?
It can be seen that samples 4 to C'-7 are not suitable for injection molding.

In order to clarify the effects of the present invention, the explanation has been given using a reflector as an example, but the composition of the present invention is widely used not only for beam reflectors but also for heat-resistant materials, and is also applicable to several types of thermosetting resins. It goes without saying that combinations and combinations of several types of phosphorus oxy-acid salt compounds can also be effectively used.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an example of a headlamp reflector molded using the composition of the present invention, and FIG. 3a is a cross-sectional view of the mold used for measuring the spiral 70-0 of the composition in Example 6. FIG. 2 is a plan view of a spiral molded body formed by the mold shown in FIG. 3a. 1... Upper mold, 3... Lower mold, 8... Spiral molded body, 4... White part. Patent applicant Nissan Motor Co., Ltd. Figure 1 Figure 2

Claims (1)

[Claims] t 5 to 260 per thermosetting resin in the thermosetting resin
It is made by blending a phosphorus oxy-acid salt compound of 1M-100% by weight of a filler per said thermosetting resin, and the total amount of the phosphorus oxy-acid compound and filler is 80 to 250% by weight.
An injection molding composition patented as % by weight. The oxy-acid salt compound of phosphorus is expressed by the following formula% (in the formula, M represents a metal including silicon, m represents the valence of the metal M, and n is a number from 0.1 to 0.7). The injection molding composition according to claim 1, characterized in that it has a composition represented by (a).