JPS605612B2 - Polymeric polyblend composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to polymeric polyblend compositions made tough by the addition of liquid polymers of conjugated gene monomers.

Polyalkenyl aromatic polymers such as polystyrene and styrene acrylonitrile polymers (SAN) are 2-36
It is known that their rutting properties such as impact strength, elongation and overall toughness can be improved by incorporating commercially available gel rubbers having a molecular weight of 30,000 to 250,000 in an amount of % by weight.

High impact polystyrene (HIPS) and acrylonitrile-butadiene-styrene copolymers (ABS) are used commercially as tough industrial plastics for molded and sheet products with great industrial utility. The industrial properties of rubber-reinforced HmS and A spot polymer polyblends require further improvement in order to meet the ever-increasing industrial demands of such plastics. In particular, high elongation at break without loss of tensile strength has been found to be critical for strength in known mPS and ABS polyblends. It is known to add lubricants such as mineral oils and waxes to improve the elongation at break of such polyprends. However, such additives reduced tensile strength and heat distortion temperature and did not improve overall toughness. The present invention provides improved elongation at break without loss of tensile strength to provide improved overall strength by incorporating a conjugated monoenriched liquid polymer into a polyblend. HI and ABS polyblends are provided in which the incorporation of liquid polymers of conjugated monomers into the polymerization composition does not inhibit the polymerization process and yet does not affect the rubber phase of the polyblends. It can be made by a polymerization process that provides a miscible additive that improves the tensile strength or heat distortion temperature loss, elongation at break, and low temperature properties of the polymeric polyblend.

The foregoing and related objects broadly include m■ 13 to 90 parts by weight of at least one monoalkenyl aromatic monomer, 'B} 0 to 85 parts by weight of at least one monoalkenyl nitrile monomer, and 'C)2
Polymeric polyblend consisting of ~3 parts by weight of a polymerization reaction product of Jen rubber 98.
It has been discovered that this can be easily achieved with a polymeric polyblend composition consisting of 8 to 8 parts by weight of a liquid polymer of (2) conjugated gene monomers and 0.2 to 20 weight percent of a liquid polymer of (2) conjugated gene monomers.

The present invention also broadly relates to improved polymeric polyblend compositions of HmS and A-based polyblends and their preparation, wherein said polyblends contain 100 parts by weight of polyblend. By incorporating 0.2 to 2 parts by weight of a liquid polymer of conjugated gene monomer into the blend, it has improved elongation at break without loss of tensile strength.

Those skilled in the art will understand that the expression "polyblend" as used herein means a substantially immiscible mixture of multiple polymers. HIPS polyprends are a mixture of polystyrene as the matrix phase and a gel rubber phase dispersed therein, and the rubber phase is grafted with polystyrene to aid its dispersion as particles within the polystyrene phase.
ABS polyblends are mixtures of gel rubber dispersed in a SAN polymer matrix phase with a rubber phase grafted with SAN to aid in its dispersion as particles. This polyblend can be manufactured as follows. [1} Mechanical melt mixing of two phases,'
21 Batch or continuous bulk polymerization of a solution of Gen rubber dissolved in monomer under hawking, {31 Bulk polymerization of monomer/rubber solution to 10-50% conversion in concentrated drop, then A combination of bulk and suspension polymerization by suspending this polymerization mixture in an inert liquid (e.g., water) and completing the polymerization; Emulsion polymerization of monomers by polymerizing them as monomer/rubber mixtures.

These methods are known to those skilled in the art.

US Patent No. 34,743 teaches bulk/suspension polymerization of HIPS polyblends, and melt mixing of HIPS polyblends is illustrated in Example 1 thereof. U.S. Pat. No. 3,509,237 discloses Example 1 A and B, respectively.
and C. teaches emulsion polymerization, bulk/suspension polymerization, and melt mixing of ABS polyblends. Continuous bulk polymerization of HIPS and ABS polyblends is described in U.S. Pat.
No. 511,895. The polyblend compositions of the present invention have improved elongation at break by adding about 0.2 to 2 parts by weight of a liquid polymer of conjugated gene monomer during melt mixing or polymerization of the polyblend. HIPS and AB with high tensile strength
It is S polyprend.

The polyblend composition of the present invention can be produced as a polymerization product of the above methods {31 and {4},
This product is improved by adding about 0.2 to 2 parts of a liquid polymer of conjugated monomers to the polymerization mixture of monomers and rubber.

The liquid polymer can be added as part of the feed composition or at any stage of the polymerization. This liquid polymer is known to have no adverse effect on polymerization (eg, polymerization rate). It can therefore be added at all stages of the transformation. Preferably, it is most economically added as part of the raw material composition for bulk and bulk/suspension polymerization processes. In emulsion polymerization processes, it is preferably and most economically added to the rubber latex as a solution in the monomers prior to polymerization. However, if the rubber latex is to be concentrated to form larger particles, it is preferred to add it to the liquid polymer along with the monomers. It is known to coagulate rubber latexes, separate the rubber and disperse it in monomers followed by bulk polymerization. In such processes, it is preferred to add the liquid polymer to the monomers along with the rubber before or during bulk polymerization. It is known to solution or bulk polymerize the polyblend compositions using 5-20% diluent to control the heat of polymerization. In such methods, it is preferred to add a liquid polymer to the initial polymerization composition. However, they can be added at any stage of the polymerization if desired. Melt blending of polymers to form polyblends is known to those skilled in the art.

Such melt mixing can be carried out in a commercial extruder, Banbury or any high cut mixer or colloidization equipment in which the mixing and colloidization of the matrix polymer, rubber and liquid polymer is carried out in the matrix phase. The process is carried out uniformly at a melting temperature of . H flower S polyblend is 1500-260q○ preferably 200o-2
Can be melt mixed at a temperature of 40o0, while ABS
is 215o ~ 26000 preferably < is 2350 ~ 25
They are melt mixed at a temperature of 0qo. The alkenyl aromatic polymer of the polyblends of the present invention has at least one formula (wherein is selected from the group consisting of fenyl, halophenyl, alkylphenyl and alkylhalophenyl and mixtures thereof, and X is halogen and (selected from the group consisting of alkyl groups containing up to 3 carbon atoms)
monoalkenyl aromatic monomers.

Examples of monomers that can be used in the polymerization are styrene, alpha-alkyl monovinylidene monoaromatic compounds such as alpha-methylstyrene, alpha-ethylstyrene, alpha-methylvinyltoluene, and other ring-substituted alkylstyrenes such as vinyltoluene, o-ethylstyrene, p - Ethylstyrene, 2,4-dimethylstyrene, other ring-substituted halostyrenes such as o-chlorostyrene, p-chlorostyrene, o-bromostyrene, 2,4-dichlorostyrene and others, ring alkyl ring halo-substituted styrenes such as 2-chloro-4-methylstyrene , 2,6-dichloro-4-methylstyrene, and others.

Mixtures of such monopynylidene aromatic monomers can be used if desired. The average molecular weight of the monoalkenyl aromatic polymer is 20,000 to 10,000
The government office may be in the Staudinger range of 40,000 to 60,000. During HI Ore Polyblend,
The monoalkenyl aromatic monomer can be present in an amount of about 13 to 98 parts, preferably about 60 to 97 parts, and most preferably about 80 to 9 parts by weight, based on 100 parts by weight of the polyblend.

The polyblend rubber can be any rubbery polymer (rubber-like) of one or more conjugated 113-genes such as butadiene, isoprene, 2-chloro-1,3-butadiene, 1-chloro-113-butadiene, piberylene, etc. and or cyclobentadiene. The polymer is ASTMD
-0℃ or less when measured at -746-52r Preferably -
It has a second-order transition temperature of 20 oo or less).

Such rubbers include a conjugated 1,3-ene and up to an equal weight of one or more copolymerizable monoethylenically unsaturated monomers, such as monovinylidene aromatic hydrocarbons (e.g. styrene, aralkylstyrene, alethylstyrene, etc.). chlorostyrene, p-tertiary butylstyrene, alpha-methylstyrene, alpha-ethylstyrene, alpha-methyl-p-methylstyrene, vinylnaphthalene, etc.), fluoromonovinylidene aromatic hydrocarbons (e.g. o-, m- and p-chlorostyrene) , 2,4-dibromostyrene, 2-methyl-4-chlorostyrene and others)
, acrylonitrile, methacrylonitrile, alkyl acrylates (e.g. methyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, etc.), corresponding alkyl methacrylates, acrylamides (e.g. acrylamide, methacrylamide, N-butylacrylamide, etc.), unsaturated ketones (e.g. vinyl methyl ketone, methyl isoprobenyl ketone, etc.), alpha olefins (e.g., ethylene, propylene, etc.)
, pyridine, vinyl esters (e.g. vinyl acetate, vinyl stearate, etc.), vinyl and vinylidene halides (e.g. vinyl and vinylide chloride and vinylidene chloride and bromide) and other polymers and block polymers. The rubber may contain up to about 2.0% crosslinker, based on the weight of rubber-forming monomer.

However, cross-linking agents can pose problems in dissolving the rubber into the monomer for the kraft polymerization reaction. Additionally, excessive cross-linking can result in loss of rubber properties. A preferred group of rubbers are stereospecific polybutadiene rubbers produced by polymerization of 1,3-butadiene.

This rubber has a cis isomer content of about 30-98% and a
Polybutadiene having a trans isomer content of 0 to 2% and formed by at least about 85% 1,4-addition with generally no more than about 15% 1,2-addition. Contains. Mooney viscosity of rubber (ML-4, 1
000○) ranges from approximately 20 to 70 and ASTM
Approximately 1500C measured from Test D-746-52r'
It has a second order transition temperature of ~-10500. HIPS
In the polyblend, the diene rubber can be present in an amount of about 2 to 36 parts by weight, preferably about 2 to 2 parts by weight, based on 10 parts by weight of the polyblend.

In ABS polyblends, Jen rubber is polybrene.
The compound may be present in an amount of about 2 to 6 parts by weight, preferably about 2 to 3 parts by weight, based on 100 parts by weight.

Examples of monoalkenyl nitrile monomers are those having the formula where R is selected from the group consisting of hydrogen and alkenyl groups containing from 1 to 4 carbon atoms.

The monoalkenyl nitrile monomer can be selected from the group consisting of acrylonitrile, methacrylonitrile, ethacrylonitrile and mixtures thereof. In the A speckled polyblend, the polymerizable monomers contain at least 1 part by weight and preferably from about 13 to 97 parts by weight, most preferably from about 50 to 75 parts by weight of monoalkenyl aromatic monomer. There is.

The monoalkenyl monomer is about 5 to 85 parts and most preferably 20 to 5 parts by weight of the polyblend.
parts by weight. Examples of monomers that can be interpolymerized with monoalkenyl aromatic and monoalkenyl nitrile monomers include conjugated 113-enes such as butadiene, isoprene, and other alpha- or beta-unsaturated monobasic acids. - and its derivatives such as acrylic acid, methyl acrylate, ethyl acrylate, butyl acrylate,
2-ethylhexyl acrylate, methacrylic acid and its corresponding esters, acrylamide, methacrylamide, vinyl halides such as vinyl chloride, vinyl bromide and others, vinylidene chloride, vinylidene bromide and others, vinyl esters such as vinyl acetate, vinyl propionate and others, dialkyl maleates or Fumarates such as dimethyl maleate, diethyl maleate, dibutyl maleate, the corresponding fumarates, and others.

A small amount preferably 1 to 10 parts by weight of polyprend
25 parts by weight and most preferably 5 to 15 parts by weight of the monomers can be used in HIPS and ABS polyblends to improve properties. Such monomers are
As copolymer monomers it can be used together with matrix monomers or gel rubber monomers. The liquid polymer of the conjugated gene monomer can be produced by bulk polymerization, suspension polymerization, emulsion polymerization, or solution polymerization.

The liquid polymer is composed of conjugated (diolefin) monomers having 4 to 6 carbon atoms, such as 1,3-butadiene, 1
It may be a homopolymer of 1- or 2-chlorobutadiene (chlorobrene), isoprene, piberylene, cyclobentadiene, 2,3-dimethylbutadiene, or a copolymer of the above monomers. Liquid polymers of such conjugated gen monomers also include conjugates of gen monomers with monoalkenyl aromatic and/or monoalkenyl nitrile monomers such as styrene, alphamethylstyrene, acrylonitrile, methacrylonitrile, etc. Polymers may also be mentioned. Liquid polymers of copolymers of conjugated gene monomers may have up to about 5% by weight and preferably up to about 2% by weight of said comonomers. One method for producing liquid polymers of conjugated gene monomers uses alkali metal (particularly sodium) catalysis and is described in U.S. Pat. No. 3,462,511.
No. 6. This liquid polymer is 5
It has a molecular weight in the range of 00 to 10,000. These polymers are normally liquid and do not have measurably large Rotor Mooney values at 21〆○, so they cannot be considered rubbers. The liquid polymers may have xanthate, mercaptan, hydroxyl or carboxyl end groups. Other terminal groups such as SOH, S02 days, S03 days, Se02 days, Se03
Sun, Li 02 days, S Water 02 days, SD 02 days, SbOH,
SO03 days, Te02 days, etc. can be used. Other commonly used operating methods include solution polymerization in the presence of an alkali metal catalyst (lithium) as taught in US Pat. No. 62,516.

This general reaction is schematically M-R-Mx(C4)→
M-R (C4 day 6) x-MM- (C4 is) n-R- (C
4) can be described by x-n-M (wherein M-RM is an organic alkali metal compound) or a combination thereof. A specific example is Li−(CH2)4−Li×(
CH2=CH-CH=CH)2→Li(C ratio-CH=C
H=CH-CH2)n-(CH2)-(CH2-CH=
CH-CH2)X-n-Li.

In a specific example, the 114-addition of butadiene is shown.

However, 1・2-addition, 1・4-addition and 1・
It should be understood that combinations with 2-additions may also occur. When the resulting polymer is treated with carbon dioxide and a mineral acid, the lithium atoms are replaced by carboxy groups, with the lithium separating out as a salt of the acid.

As a result, such treatment yields carboxy-terminated polymers. Hydroxy-terminated polymers with reactive hydroxy end groups are obtained by reacting a polymer with terminal lithium atoms with an epoxy compound at high temperature, followed by treatment with chlorinated acid to replace the lithium atoms with hydrogen atoms.
The liquid rubber is 110 pi to 11,500 ○ preferably -7
It is produced in the range between 50 and 17,500.

The particular temperature employed will depend on both the monomer and initiator used in polymer preparation. A person skilled in the art will have no difficulty in selecting the particular initiator, and the particular pressure and temperature necessary to achieve a particular result. This is within the knowledge of the art. The amount of catalyst used can vary, but preferably ranges from about 1 to about 30 mmol per 100 units of monomer. The polymerization is preferably carried out in the presence of a suitable diluent such as benzene, toluene, cyclohexane, xylene, n-butane, or the like. Generally, the diluent is a hydrocarbon, e.g. 4 to 10
selected from paraffins, cycloparaffins or aromatic compounds containing 5 carbon atoms. The liquid polybutadiene described has only functional end groups.

A preferred class of liquid genpolymers are those with termini other than functional groups classified as telomers. US Pat. No. 3,760,025 discloses such telomers having telogens or terminal groups that terminate polymers of gene monomers or taxogens. The telogens used are aromatic compounds, in particular those containing at least one hydrogen atom which can be replaced by a lithium atom, provided that all other substituents reactive with the organolithium composition or complex used as catalyst ( For example, aromatic hydrocarbon compounds free of hydroxyl, chlorine, bromine, iodine, carboxyl and nitro. Examples of such telogens are benzene, C,~C4-mono-, di- and trialkylbenzenes such as toluene, ethylbenzene, n-propylbenzene, isopropylbenzene, o
1, m- and p-xylene, 1,3,5-trimethylbenzene, n-secondary and tertiary butylbenzene, cyclohexylbenzene, alkyl (especially C, ~C4) and cycloalkyl substituted polycyclic aromatic compounds For example, 1.
2,3,4-tetrahydronaphthalene, 1-methylnaphthalene, 1-impropylnaphthalene, 1,3-isobutylnaphthalene and 1-cyclohexylnaphthalene,
Alkoxy aromatic compounds such as anisole, 1,3-dimethoxybenzene, monopropoxybenzene, 1-methoxynaphthalene and 1,3-dimethoxynaphthalene,
dialkylamino aromatic compounds, especially those in which alkyl is C, ~C
4, such as dimethylaminobenzene, 1.
3-bis(diisopropylaminobenzene) and 1-dimethylaminonaphthalene.

Particularly satisfying is toluene. The toluene usually provides one terminal phenyl group per Jen polymer chain, and the other terminal group is the organic group of the organometallic initiator, such as lower alkyl. US Pat. No. 3,678,121 and US Pat. No. 3,751,501 describe other liquid Jen polymers having various microstructures for the Gen moiety.

Such liquid gene polymers range from 75 to 95% unsaturated and preferably have a molecular weight range of 5.
00-3000 and about 5-40% trans-1.4- with a terminal aralkyl group content of 3-10% by weight.
vinyl, about 5-35% cis-1.4-vinyl and about 3
It has a polybutadiene microstructure of 5-90% 1,2-vinyl. The polybutadiene microstructure may also contain 2-25% of closed 1.2 structures. The terminal lithium group can be removed with aralkyl or an acid such as hydrochloric acid to introduce hydrogen for chain termination.
Such liquid polymers of conjugated diene rubbers with non-reactive end polymers are generally sold under the trade name "Liten" by Lithium Corporation of America;
[2] Product name by Zé Richardson Kompany “
"Rjcon" or [3' Product name "Hys ni 1" by Dynachem Corporation
It is commercially available as .

The present invention is then broadly applicable to improved polymeric polyblend compositions and their production of HIPS and A-spot polyprends, where said polyblends are made of 100 parts by weight of polyblends. By incorporating 0.2 to 2 parts by weight of a liquid polymer of conjugated polymer monomer into the blend, the elongation at break is improved without loss of tensile strength.

About 5 to 5% by weight in the polymeric polyblend on a weight% basis
Preferably from 10 to 3% by weight of the Jen rubber is replaced with a liquid polymer of the Jen monomers described above to produce a polymeric polyblend with improved elongation at break and overall toughness. I can do it. The following examples illustrate how to apply the principles of the invention, but they should not be considered as limiting the scope of the invention.

Note that parts are by weight unless otherwise specified. Example 1 (Preparation of m-tower polyblend) In a reaction vessel, 8.0 parts of butadiene homopolymer having a molecular weight of about 1,000 and 92.0 parts of styrene monomer were added. I worshiped Ikarito.

The mixture also contained 0.1 part ditertiary butyl peroxide, 0.05 part tertiary dodecyl mercaptan and small amounts of antioxidant and mineral oil. Bulk polymerization is carried out to about 30% conversion, and the syrup thus produced is then mixed with 425% water. Foundation and 9
0.5 part of a copolymer of 5.5 mol% acrylic acid and 4.5 mol% 2-ethylhexyl acrylate, 0.3 part of calcium chloride and R.T. Pander under the trade name "Dawan". A suspension formulation provided by 1.0 part of a naphthalene sulfonic acid-aldehyde condensation product available from Bild was mixed.

This suspension was boiled and heated initially to about 100 qo. It was then heated under pressure to about 155 OO and at a pressure of about 6.3-7.4 k9' bulbs for about a 4 hour polymerization cycle. The batch was then cooled, centrifuged, washed and dried to recover the polymerized product in the form of small spherical beads. The beads recovered from the polymerization process are about 8.0% of the grafted rubber with a superstrate to substrate ratio of 170:100. and the rubber particles had a diameter of 0.4 to 2.0 microns and an average size of about 0.8 microns. 62.5 parts of the beads thus produced were then melt mixed with 37.5 parts of polystyrene homopolymer, 0.3 parts of alkylated phenolic antioxidant and 0.2 parts of stearic acid soap. A HI polyblend composition containing 5% by weight rubber was produced.

Extrusion samples made therefrom had a yield point of 205k
9/Ground and has a tensile strength of 254X9/Ground at break and 22% as measured by ASTM D-6 Total Test
It was found that the material had an elongation at break of . Example 2 (Preparation of ABS Polyblend) A Latex of butadiene/acrylonitrile copolymer (93:7) containing 50.0% solids and about 1.0% rubber inverse soap as emulsifier 250. Ikarito'ko, 70. Eave water, 1. Rubber inverse soap and 1. $ parts of potassium persulfate was added.

This emulsion was heated to 65 qo while stirring and then heated to 140 qo for about 6 hours. 60. A loose portion of acrylonitrile and 3.0 parts of terpinolene were added. The emulsion is then held at temperature for one hour while cooling, coagulated by the addition of magnesium sulfate, and the coagulum is then washed and dried to form a copolymer of styrene and acrylonitrile and polymerized styrene. A graft copolymer of a ptagene-acrylonitrile copolymer grafted with a p-acrylonitrile copolymer was obtained. The resulting graft copolymer has a superstrate to substrate ratio of about 0.9:1.0 and a particle size (number average) of about 0.14 microns. B Soluble butadiene rubber 14. $26. of acrylonitrile and 6
0. It was dissolved in basic styrene.

plus 0.07 parts of tertiary butyl peracetate, 0.07 parts of tertiary butyl peracetate;
0.5 parts of di-tert-butyl peroxide and several stabilizers were added. This mixture was heated to 100 qo while stirring. Terpinolene was added over approximately 5 hours prior to chain transfer and an additional 0.4 part was added at the end of that time. At 30.0% monomer conversion, this partial military syrup was dispersed in 120.0 parts of water and added with 2. Styrene in the anchorage and 95.5 mol% acrylic acid as a suspending agent and 4
．． Copolymer with 5 mole % 2-ethylhexyl acrylate (approximately 4
．． 0.3 parts (having a specific viscosity of 0) were added.

The resulting suspension was heated to polymerize the remaining monomers, cooled, centrifuged, washed and dried to recover the graft copolymer in the form of small spherical beads. Superstrate to substrate ratio is approximately 0.9-1.0:1.0
and the particle size was about 0.9 microns. C The graft copolymer (21.4 parts) of A above was melt-mixed with 78.6 parts of SAN copolymer to give about 7.47 parts of
Polyprends containing 50% of Jen rubber were produced and tested. The tensile strength at the yield point is 660 Si (4
．． 6 x 1 pi k9/re), 600 yusi (4.
2×1 pik9/〆), and the elongation at break is 25%.
(ASTMD-638).

○ The graft copolymer of B (51. eave part) was added to 47.
Mixed with 5 parts of SAN copolymer and 1.5 parts of carpowax to give 7.21 parts by weight of Jen gum in the polyblend.

The tensile strength is 600 si (4.2 x 1 bik) at the yield point.
9'〆) and at the breaking point 560 serpentine si (3.9
x 1kg/〆) and gave an elongation at break (ASTMD-Spot) of about 20%. Example 3 (mR polyblend with liquid polymer) Liquid polymer of 95 parts styrene monomer, 4 parts butadiene homopolymer (Mooney viscosity 35) and 1 part putadiene monomer (Litene QH, 35 % vinyl, molecular weight 3000) was repeated.

This polymerization product contains 4 parts of diene rubber and 1 part of liquid polymer and is comparable to the final blended product of Example 1 containing 5 parts (5% by weight) of diene rubber. Its tensile strength is 300 si (2.1
×1pk9/me), and the tensile strength at the breaking point is 350
The strength was 2.5 x 1 pk9/〆, and the elongation at break was 46% (ASTMD-638). The polyblend of Example 3 in which 1 part by weight (20% by weight) of Jen rubber was replaced with a liquid polymer of butadiene monomer unexpectedly showed an increase in elongation at break of about 100% without loss in tensile strength at yield. It is obvious that this can be achieved to provide an excellent overall strong sea bream. Example 4 (ABS polyblend with liquid polymer) Butadiene/acrylonitrile rubber in Example 2A above 25. Examples 2A and C were repeated using 25.0 parts or 10% by weight of a liquid polymer of putadiene monomer (Litene QH) in place of the anchor.

The tensile strength (TS) at the yield point of this polyblend is 60
The tensile strength at the breaking point is 650 si (4.6×1 pks/〆).
and the elongation at break is approximately 51% (ASTMD-6
It was found that it was a patch. Examples and D were repeated substituting 2.8 parts (2% by weight) of the liquid polymer of the above examples for the 2.8 parts by weight of Jen rubber in Examples.

The tensile strength of this polyblend is 650 Si at yield point.
(4.6 x 1 pik9/pillow), 700 si at break point (
4.9×1pk9/me) and elongation at break is approximately 4.
5% (ASTM D-Muscle 8). Unexpectedly, it has been found that this A-Satoshi polyblend has an increase in elongation at break of about 100% without a loss in tensile strength, providing overall improved toughness. Example 5 (HI polyprend melt-polymerized with liquid polymer)
Example 1 was repeated to produce a HIPS polyblend having about 8.0% by weight Jen rubber.

Thereafter 50. beads thus produced. 1 part by weight of liquid polymer of butadiene polymer (Litene QH)
．． 0 parts and 49.0 parts of polystyrene homopolymer to produce a polyprend having 4 parts by weight of Jen rubber, 1 part by weight (2% by weight) of liquid polymer and 95 parts by weight of homopolymer. I let it happen. The extruded samples produced therefrom had a yield point of 300 blood si (2.1 x 1 pk
9/pillow) and 370 cape si (2.6×l pik
9') and elongation at break of approximately 42% (A
STMD-638). H
The HIPS polyblend product, which is a melt blend of mS polyprend with a liquid polymer of putadiene monomer, unexpectedly provides greatly improved elongation to break without loss of tensile strength, resulting in improved overall strength. It has been discovered that the present invention provides polyblends with high grain toughness. Example 6 (ABS Polyblend Melt Mixed with Liquid Polymer) Example with 7.21 Parts (7.21%) of Gen Rubber in A Mother Polyblend Example Using ABS Polyblend Made with Fox 5 was repeated.

Approximately 66.0 parts of polyblend was melt mixed with 1.44 parts of liquid polymer (Litten QH) and 27.8 parts of SAN polymer to form 4.77 parts by weight of Gengum, 1.44 parts by weight ( A polyblend having a liquid polymer content of 23% by weight was produced. The extruded samples made therefrom had a tensile strength of 630 msi (4.4 x 1 k9/m) at the yield point and 660 msi (4.6 x 1 k9/m) at the point of breakage and a tensile strength of about 43 % elongation at break. Example 7~
The 18 HI tower and ABS polyblends were melt mixed with various amounts of liquid polymer as in Examples 5 and 6.

The prescription rates are shown below along with the nature of the study. (Note) (1) Riten QH (35% vinyl, molecular weight 3,000
) (2) Histel B-2000 (90% vinyl, molecular weight 2,000) (3) Rikon 150 (70% vinyl, molecular weight 2,000) (4) Riten AH (55% vinyl, molecular weight 1,800) This test From the data, the HIPS polyblend control (Example 7) with an elongation at break of 22% and the
A acid polyblend control (Example 11) having 5% of that in which about 10 to 5% by weight of the Jen rubber was replaced with a liquid polymer into which a liquid polymer of conjugated Jen monomers was incorporated. It is clear that the elongation at break is greatly improved by doing so.

Claims (1)

[Claims] 1 (1) (A) 13 to 97 parts by weight of at least one monoalkenyl aromatic monomer, (B) 0 to 85 parts by weight of at least one monoalkenyl nitrile monomer, and (
C) 98.8-80% by weight of a polymerization reaction product of 2-36 parts by weight of a diene rubber with a second-order transition temperature not higher than 0° C. and (2) a molecular weight of conjugated diene monomers of 500-10,000. The polymerization reaction product contains the monomers (A) and (
B) a matrix phase polymer having a Staudinger molecular weight of 20,000 to 100,000, and a diene rubber in the form of rubber particles grafted with the above monomers (A) and (B) dispersed therein. a rubber-reinforced rubber reinforced polyblend with improved elongation-tensile strength, wherein the liquid polymer of the conjugated diene monomer is dispersed within the polymeric polyblend. Polymeric polyblend compositions.