专利摘要:
There are provided compositions comprising (a) a polyphenylene ether; (b) a polystyrene resin; (c) a precompounded polymer system comprising an olefinic resin and an elastomeric block copolymer alone, or in further combination with a dispersing agent; and (d) an elastomeric block copolymer resin. The use of (c) and (d) together provides, surprisingly; higher impact strength over the entire composition range of (a) to (b), with lower amounts of (c) and (d), based on the total resinous components of the system, being required.
公开号:SU852178A3
申请号:SU772553205
申请日:1977-12-02
公开日:1981-07-30
发明作者:Буссинк Ян;Вильхельмус Якобус Демунк Йоханнес
申请人:Дженерал Электрик Компани (Фирма);
IPC主号:
专利说明:

The invention relates to. The technology of production of plastics, in particular, to a thermoplastic molding composition based on poly- (2,6.-dimethyl-1, 4-phenylene) ether, can also be used in the chemical industry. The known thermoplastic molding composition consisting of poly- (2,6-dimethyl-1,4-phenylene) ether and polystyrene resin D The thermoplastic molding composition consisting of poly- (2, b-dimethyl-l, 4-phenyl) ether, polystyrene and an elastomeric block copolymer of poly (styrene-CO-ethylene-butylene-styrene) f2 However, these compositions have not sufficiently high impact strength. The purpose of the invention is to increase the impact strength of the composition. This goal is achieved by the fact that a thermoplastic composition is made of poly (2,6-dimethyl-1,4-phenylene) ether, polystyrene, and an elastomeric block copolymer of poly- (styrene-CO-ethylene-butylenstyrene), added It contains a poly-alpha-olefin resin pre-compacted in the above block copolymer selected from the group consisting of polypropylene and an alternating ethylene-propylene copolymer with a weight ratio from 1: 4 to 4: 1, and the following ratio of components, parts by weight: (2,6-Dimethyl-l, 4-phenyl) ether Polystyrene Elastomer block 10, 5-13 copolymer Pre-compounding poly-alpha-olefin resin Other auxiliary additives, nitrile., Plasticizers, pigments, flame retarders, etc. may be present in the compositions in amounts varying between 1 and 100 parts by weight. of the total amount of polymer components. Preferred are reinforced compositions containing reinforcing amounts of a reinforcing filler, such as porotec, whiskers, fibers or plates of metals, such as aluminum, bronze, iron or nickel, and non-metals, such as carbon fibers, needle Ca CO, asbestos, TU, titanate filaments crystals, flakes, etc. Such reinforcing fillers should be in the amount of, for example, 2-90% by weight, preferably 10-60% by weight. Especially that condition is important for fiberglass.
Plasticization of the precompound can be carried out using ordinary material in small quantities, for example, 1 hour per 100 weight, hours, calculated on the total weight of the component. Preferably, the plasticizer is mineral oil, phosphoric acid ester or phthalic acid ester.
The method of preparation of the polymer composition can be any. The preferred method is to mix polymers and additives, such as reinforcing fillers in the form of powder, granules and fibers, extruding the mixture and reek to granules suitable for shaping using the means commonly used to form solid thermoplastic compositions.
The following formulations were prepared using the usual procedure, including mechanical mixing, and then coextruding in a double-screw extruder at 282 s and molding into the test products in an injection molding machine with a reciprocating screw (VP) at 2.0 W-304 s per cylinder and 77-99 ° C on the form, In the compositions, a part of the blo: c copolymer and the olefin resin is a uterine mixture with pre-compounding in a twin-screw VP or an adequate rubber processing resin.
The notched Izod impact strength is determined. films with drop pointed loads on disk specimens of 1/8 inch, tensile strength and rigidity, heat distortion temperature and apparent melt viscosity at 1500 s and 2820 s.
The formulations prepared and the physical properties of the molded products are the following.
Example (control).
Composition, weight.h .:
Poly- (2,6-dimethyl-1,4-phenylene) ether 30
Crystalline Polystyrene Resin55
Elastomeric block copolymer resin15
Poly- (2,6-dimethyl-1,4-phenylene) are used. The ether is manufactured by General Electric Company, in the form of a powder, intrinsic viscosity is 0.40, 5 dl / g. As a polystyrene resin, a crystalline polystyrene resin net W70QO, average molecular weight MW is 250,000,
Shell-Kraten C-1650, styrene-ethylene-butylene styrene locomotion copolymer is used as a plastomeric block-co-polymer resin.
Properties:
Impact strength according to Izod, kg / cm notch 18.4 UdarnA film strength with falling pointed load, cr13.6 Strength at stretching, kg / cm 548.4 Stretch modulus, kg / cm 23910 Heat distortion temperature under load 28, 6 kg / cm, 0118 Melt viscosity, P 1700 The separation stage caused by delamination is observed in the formed ruska when it is broken.
Example 2 (control). The components are mixed, the mixture is poured and tested in the usual manner. Composition, parts by weight: Poly- (2, b-dimethyl-1,4-phenylene) ether 30 Crystalline polystyrene55 Polypropylene resin 3 Same as previously compounded with a block of 15, 0 copolymer resin as in example 1 6.0 Mineral oil 6.0, Shell KM 6100 polypropylene, melt index 5.6 are taken as polypropylene resin, and Esso primol 342, eg boiling point is used as mineral oil. 3200s Properties:
Impact strength Izod, cm-kg / cm notch 42.7 Impact resistance of a film with a falling pointed cargo, kg11.34
Strength at stretching, kg / cm 400.8 Module of stretching, kg / cm 25310 Heat distortion temperature under load 28.6 kg / cm, ° С102
Melt viscosity, P 1400 If the block copolymer is not previously compounded, the impact strength is low.
Example 3. The components are mixed, the mixture is molded and tested by a common method. Composition weight.h .: Poly- (2,6-dimethyl-1,4-phenylene) ether 30 Crystalline polystyrene resin 55 Polypropylene resin (as in Example 2) 1.5 Same as previously compounded with
权利要求:
Claims (2)
[1]
7.5 elastomeric block copolymer resin (as in Example 2) 3.0 Mineral oil (as in Example 2) 3.0 Elastomeric block copolymer resin. (as in example 1) 7.5 Properties Impact strength according to Izod, cm-kg / cm notch 3 Impact strength with falling pointed load, kg2 Strength at stretching, kg / cm 41 Extend modulus, kg / cm 26 Thermal temperature deformations under load 28.6 kg / cm} ° C10 Melt viscosity, P 1 In addition to the high impact, the well-proposed composition ensures the formation of the product with an excellent surface appearance. Other modifications are possible, for example, the replacement of a crystalline p styrene resin with rubber modified impact resistant resin, resin or butadiene-modified polystyrene. Example 4. Components are made, the mixture is molded and tested in the usual manner. . Composition, parts by weight: Poly- (2, b-dimethyl-1,4-phenylene) ether Crystalline polystyrene resin Polypropylene resin Same as previously compounded with block copolymer resin (as in Example 1) Same with crystalline polystyrene resin Block copolymer resin (as in example 1) 7.5 Properties: Impact strength according to Izod, cm-kg / cm notch Impact strength when nipped cargo, kg Strength at stretching, kg / cm Modulus of stretching, kg / cm Temperature of thermal deformation under load 28.6 kg / cm ° C Viscosity of the melt, P 1800 It should be noted That the temperature of thermal deformation increases 118, when the polystyrene resin is replaced with mineral oil resin as a doping agent in the pre-mix. Waste temperatures can also rise, for example up to 329.4 ° C. Impact strength, and 1NY surface look excellent. . Example 5. The following recipe was blended, molded and tested in the usual manner. Composition, parts by weight: Poly- (2,6-dimethyl-1,4-phenylene) ether 45 Crystalline polystyrene resin 32.5. Polypropylene resin 2.5 Same as previously compounded with block-copolymer resin (as in Example 1 ) 5.0 Same with Kristall Polystyrene Resin7, 5 Block copolymer resin (as in Example 1) 7.5 Properties: Impact strength Izod, smkg / cm notch 51.8 Impact strength with a falling e-aosten load, kg Strength at stretching, kg / cm. Tension modulus, kg / cm. Temperature of thermal deformation. At a load of 28.6 kg / cm, 132.2 Melt viscosity, P 2900 An increase in the content of polyphenylene ether in the composition leads to a substantial increase in shock resistance. Examples 6-7. The following epthures were mixed, molded and. Tested according to the usual procedure, parts by weight: Poly (2. d-dimethyl-) 4-phenylene) ether 45 60 Crystalline polystyrene resin 40 25 Alternating polyethylene propylene copolymer 2, 5 2.5 Same as previously compounded with block copolymer resin (as in example 1) 5.0 5.0 Vloc copolymer resin (as in example 1) 7.5 7.5 As the alternate copolymer, Hüls copolymer is denoted with 7200. Properties: Impact strength Izod, cm-kg / cm notch 58, 0 62.5 Shock strength with falling pointed load, kg 45.4 54.4 Strength with falling height 527, 3 562.5 lives, kg / sc g modulus of stretch. 24610 23910 Heat distortion temperature with a load of 28.6 kg / cm, 129.4 148.9 Viscosity is melting 5300 5300 As follows from the examples, this proposed composition has a high impact strength compared to the known. Claims. A thermoelastic molding composition consisting of a poly (2,6-dimethyl-1,4-phenylene) ether, polystyrene and an elastomeric poly (styrene-co-ethylene-butylene-styrene) block copolymer, characterized in that , in order to increase the impact strength, it additionally contains a poly-alpha-olefin resin previously compounded in the above-mentioned block copolymer selected from the group containing polypropylene and an alternating ethylene-propylene copolymer, in a weight ratio from 1: 4 to 4 S1, and the following the ratio of components, parts.h .: Poly- (2 (b-dimethyl-1,4-phenylene) ether 30-60 Polystyrene25-55 Elastomeric block copolymer 10, 5-13 Pre-compounding poly-alpha-olefin resin 1.5-3 Information sources taken into consideration 1.Patent US No. 2819761.kl.160-784,
[2]
2. US patent 3994856, cl. 260-42.47, publ. 11/30/76 (prototype).
类似技术:
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同族专利:
公开号 | 公开日
CA1104738A|1981-07-07|
JPS5371158A|1978-06-24|
AU513918B2|1981-01-15|
FR2372864A1|1978-06-30|
DE2750514C2|1987-10-15|
DE2750514A1|1978-06-08|
AU3117877A|1979-06-07|
IT1088310B|1985-06-10|
NL7713128A|1978-06-06|
JPS6211028B2|1987-03-10|
MX146212A|1982-05-26|
GB1556957A|1979-12-05|
BR7708059A|1978-07-11|
DD134238A5|1979-02-14|
US4145377A|1979-03-20|
FR2372864B1|1982-02-26|
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法律状态:
优先权:
申请号 | 申请日 | 专利标题
US05/747,327|US4145377A|1976-12-03|1976-12-03|Composition of a polyphenylene ether, a styrene resin, a precompounded polymer system and a block copolymer of a vinyl aromatic compound and an olefinic elastomer|
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