DE1694462B2 - Molding compounds precipitation from 1570789 - Google Patents

Description

The bending stress was measured on samples 51 mm long and 12.7 mm wide, which had been cut from a sheet 3 mm thick made by pressing. The samples rested on two slides 38.1 mm apart. Sufficient load was applied in the center of this to deflect the samples at a rate of 457 mm / min. The bending stress v was calculated by multiplying the stress at the moment of the break by the factor: (1.5) * (38.1) / (12.7) * (3) ² = 0.5.

Vicat fully He- ( ⁰ Q softening 108 rubber Point 110 1/10 ( ⁰ C) 109 Acrylonitrile / butadiene, mixed polymer
(33:67 mole percent)
Butadiene / methyl methacrylate, mixed 101 polymer (75:25 mol percent) 104 108 Ethylene / ethyl acrylate, copolymers 110 sat (40:60 mole percent) 97 Butyl rubber, mixed polymer 105 Ethylene / vinyl acetate, copolymer 101 106 (55:45 molpio cent) 103 Polyethyl acrylate Acrylonitrile / butyl acrylate, mixed poly 95 merisat (13:87 mole percent) 98 example 1

A thermal copolymer obtained from 6 mol percent N-phenylmaleimide, 75 mol percent acrylonitrile and 19 mol percent isobutene, had a softening point above 100 ^° C. and a flexural strength of 18 kg / mm ² , was mixed with various types of rubber on a steam-heated roller. The various types of rubber, of which 35 g each were mixed with 100 g of the thermal copolymer, and the softening points of the mixtures obtained are given in the table above.

ίο There were still mixtures with the following Types of rubbers produced, each used in an amount of 42 g per 100 g of thermal polyester became:

a) nitrile rubber with a number of carboxy groups;

b) acrylonitrile / butyl acrylate, copolymer
(20:80 mole percent);

c) Acrylonitrile / butadiene, copolymer
(40: 60 mole percent), crosslinked;

d) neoprene;

e) polybutadiene mixed with 1% divinylbenzene and

f) Ethylene / methyl methacrylate, copolymer
(48: 52 mole percent).

B e i s ρ i e 1 2

The latex of a thermal copolymer of 5 mole percent N-phenylmaleimide, 75 mole percent acrylonitrile, and 20 mole percent isobutene was mixed with various amounts of an acrylonitrile / butadiene (46: 54 mole percent Q rubber latex, and the resulting latex blends were worked up to produce products corresponding to the 5th , 10, 15 and 20 percent by weight rubber. These products were formed under pressure and the molded pieces had Vicat softening points of 111, 112, 108 and 107 ^° C., respectively.

Claims (2)

1 2 an N-arylimide of bicyclo- [2,2, l] -5-hepten-2,3-di- patent claim: carboxylic acid is used. This comonomer can be produced by reacting N-aryl maleimide with cyclo molding compounds consisting of a mixed poly pentagen. The production of this merisate A, which has been produced from 5 comonomers, is quite complicated. 1. 1 to 99 mole percent acrylonitrile, In the case of this separation application 2. 1 to 99 mole percent N-aryl maleimide, belonging to the parent application, has been found and optionally acrylonitrile polymers with improved deformation 3. 1 to 98 mole percent of an olefin, features, a high softening point (in and B: a rubbery elastomer sawn ίο generally on the order of 100 ⁰ C and standing from either a diene rubber, an above) and valuable physical properties saturated acrylate or Äthylenmisch- can be obtained by using acrylonitrile with polymer rubber. certain N-substituted maleimides are polymerized by free radical catalysis. This mixed 15 polymers contain 1 to 99 mole percent acrylonitrile and 99 to 1 mole percent of at least one N-aryl maleimide. The preferred interpolymers contain 40 to 90 mole percent acrylonitrile and 60 to The subject of patent application P 1 570 789.8-44 10 mol percent of at least one N-aryl maleimide are copolymers consisting of 1 to 99 mol percent 20 and are produced by copolymerization N-arylmaleimide, the N-aryl substituents of which are none of a monomer mixture which is 60 to 92 molar basic Have character, and from 99 to 1 mole percent acrylonitrile and 8 to 40 mole percent min percent Consist of acrylonitrile. According to a preferred contains at least one N-aryl maleimide, wherein a Embodiment, the copolymers consist of free radical catalyst is used. 1 to 98 mol percent acrylonitrile, 1 to 98 mol percent 35 Copolymers are also described which N-acrylic maleimide and from 1 to 98 mole percent, from 1 to 98 mole percent acrylonitrile, from 1 to 98 mole percent olefins. percent of at least one N-aryl maleimide and off Polyacrylonitrile can be made by polymerization in which from 1 to 98 mole percent of at least one olefin, bulk, in solution or aqueous dispersion, the total amount of the ingredients being 100 moles and being a useful fiber-forming material being 30 percent. The preferred polymers, with a high softening point and good retention, have 60 to 90 mole percent acrylonitrile, 1 to 15 mole resistance to numerous chemicals. The percent of N-aryl maleimide and 5 to 30 mol percent of this material used extensively for olefin and can be produced by polymer processing in molten form, for example when a mixture is sated for 1 to 10 mol percent melt spinning or for injection molding processes, is at least one each N-Arylmaleimids, 15 to 30 mol-but due to its poor thermoplasticity even percentage of at least one olefin and 84 to 60 mol-at temperatures of 250 ° C limited. So this percentage contains acrylonitrile, whereby this entire material only makes up 100 mol percent when high pressures are applied,
and deformable at temperatures at which degradation can now take place. In addition, the additional incorporation of synthetic rubber-like products made therefrom are quite brittle and polymers splinter into the abovementioned copolymers, for example when they are only obtained by molding compounds with improved properties 2 kg / mm ² and rarely more than 4 kg / mm ^{2 in} terms of. These rubber-like polymers are examined for ^{their flexural strength at 20 ° C.} or copolymers are diep rubbers that It has already been proposed to use the own 45 saturated acrylate rubbers and Ethylenmischpoly- properties of acrylonitrile polymers through this to merizate rubbers. The rubber material imparts modify that during their polymerization the named copolymers are mixed with an increased polymerizable monomers are added. Bei-toughness, which improves impact resistance games of such monomers are: vinyl chloride, vinylidene will. But the softening point is not chloride and butadiene. It is true that the products from 50 are significantly reduced. Such copolymers are less brittle and if both the acrylonitrile copolymers are easier to shape, but they generally have the disadvantage that they are also available as latex as the rubber material (for example, as products of an emulsion softening point and a low polymerisation modulus) ), then the components do not have to be seated. Thus, the copolymers are generally insulated, but the latices can ^{not withstand temperatures of more than 100 °} C. and cannot be mixed. After the addition of the desired properties, there are no hard objects during compression. Additives such as B. Stabilizers and antioxidants Another disadvantage of acrylonitrile homopolymers is that the mixture leads to coagulation. sate consists in their poor dyeability. To do this by putting it in a dilute electrolyte solution improvement of the dyeability was poured in the German 60, such. B. in an aluminum sulfate or Patent specification 1 040 243 proposed with the acrylic calcium chloride solution, whereupon the product isolated nitrile to copolymerize an N-pyridyl maleimide. and washed with hot water. The above-mentioned poor processability of the other hand, the two components However, acrylonitrile homopolymers are also used in the melt on heated rollers or in not improved. 65 pieces can be mixed in the extruder. In U.S. Patent No. 2,706,720, a method is described in greater detail in the following examples explained for the production of acrylonitrile copolymers. Unless otherwise stated, all parts are in which, among other things, is given as a comonomer, expressed in parts by weight.