Ebonite mix on base of butadiene styrene rubber

FIELD: manufacture of rubber articles on base of butadiene styrene rubber; manufacture of ebonite battery monoblocks.

SUBSTANCE: ebonite mix on base of butadiene styrene rubber contains reclaim, sulfur, diphenyl guanidine, magnesium oxide, kaolin, paraffin, phthalic anhydride with synthetic fatty acid, soap-surfactant, petrolatum oil and filler. Used as filler is ion-exchange resin -cationite KY-2 ground preliminarily to fraction of 1-40 mcm and taken in the amount of 180-360 parts by mass.

EFFECT: improved physico-mechanical parameters of vulcanizers; reduction of deficiency of rubber phase in ebonite; utilization of used ion-exchange resins.

2 tbl

 

The invention relates to the manufacture of rubber products based on the best choice of rubbers, in particular the production of plastic products - battery monoblocks.

Famous ebony mixture on the basis of the best choice of rubber (A.S. No. 1027178, publ. 07.02.83, bull. No. 25), including reclaim, sulfur, accelerators, slaked lime, softner, and ketogenic as filler, the mixture vulcanized at a temperature of 200-210°C for 5-10 minutes.

The disadvantage of this mix include the following: used as filler of natural material, subjected to special processing; conducting high-temperature and short-time vulcanization ebony mixture leads to destruction of the surface, uneven break the grid, resulting in the formation of cracks in the products; avoid use in the manufacture of large and thick-walled products.

Closest to the proposed invention is ebony mix based butadienestyrene rubber (A.S. No. 1004420, publ. 15.03.83, bull. No. 10), comprising a filler, representing a departure from the production Belko-vitamin concentrate (BVK) of paraffin oil.

We offer a mixture of partially eliminates the disadvantages of the above analogy, but in turn does not lack is nedostatkov: presence of waste in the production of PVC enough moisture (16-18 wt.%), which are not desirable in high temperature vulcanization due to the formation of porosity in the product; the residual protein content in the waste requires certain conditions of storage and the introduction of inhibitors of biodegradation; the complexity of the introduction of rubber of a large number of porous filler with a density of 0.38 g/cm3in the mixing equipment, as a result of declining performance not only due to the increasing volume of processed components, but also requires more time mixing to achieve a homogeneous mixture.

Technical objectives of this method are: the improvement of physico-mechanical properties of vulcanizates; the increase in the content of the filler in the ebony mixture to reduce the content of the expensive polymer phase; the disposal of spent ion-exchange resins in the manufacture of rubber products.

This object is achieved due to the fact that in ebonite mixtures based on the best choice of rubber, including reclaim CT, sulfur, diphenylguanidine, magnesium oxide, kaolin, paraffin, alloy phthalic anhydride with alcohols, soap, vaseline oil, as filler waste, what is new is that the filler used is pre-crushed to a fraction of a 1.0÷40,0 μm waste ion-exchange resin KU-2 - product copolyme is Itachi of styrene and divinylbenzene with grafted sulfopropyl in the amount of from 180 to 360 parts by weight of in the following ratio of components in ebony mixture, parts by weight:

rubber SKS-ARKM-15100-15
Reclaim CT150÷180
Sulfur50÷87
Diphenylguanidine2
Magnesium oxide15
Kaolin50
Paraffin10
Alloy phthalic anhydride with SJK2
Soap (surfactant)4
Vaseline oil23
Spent ion-exchange resin
fraction, µm: 1,0÷40,0 (KU-2)180÷360

The technical result is:

- achieving high physico-mechanical properties of vulcanizates obtained with the use of waste ion-exchange resins, which contain monomer units, similar to the best choice rubber;

- reducing the deficit rubber phase in ebonite mixtures;

- reduction of expenditure norms of sulfur vulcanization ebonite mixtures;

- the expansion of raw materials with the use of secondary resources in the production of rubber products, including battery monoblocks.

Experienced ebony CME and are made on a laboratory roll mill at a standard mode in accordance with the recipe, shown in table 1. As filler ebony mixture used waste ion-exchange resin, in particular lost functional ability of the cations: KU-2-8, KU-2-20 and KU-2-3, which represents a waste of the process of thermal power plant, nuclear power plants, and in the manufacture of the IC. Spent ion exchangers pre-ground in a laboratory ball mill, and then on the cage type A Riga Association "EX" with a capacity of 30 g/min and a rotor speed of 8000 rpm, which allows to obtain finely dispersed filler with a particle size of up to 1 μm. The separation of the fractions is carried out with the help of microset with a cell size of 80 μm, and the fraction 1÷40 μm obtained by sedimentation in water by sedimentation of larger particles of the cation.

From table 2 sample No. 6 (with the introduction of 360 parts by weight of the spent ion-exchange resin faction 1÷40 μm per 100 parts by weight of oil-filled rubber SKS-SARK-15) shows that plastoelastic indicators ebonite mixtures and physico-mechanical properties of vulcanizates based on them exceed the known values of hard rubber mixtures and vulcanizates, in addition to the parameters of plasticity on the Carrera and heat according to Martens which are observed at the level of the known samples to determine the boundary conditions in the recipe ebony mix: the number of regenera is a - 180 parts by weight of sulfur, and 50 parts by weight per 100 parts by weight of oil-filled rubber.

Table 1
Recipe prototypes ebonite mixtures
The composition of the mixtureThe content of the mixture components, parts by weight
KnownRoom test sample
1234567
Rubber
SCS-SARK-15*-115115115115115100100
Rubber SKS-SRP100-------
Oil MO-615-------
Reclaim CT150150150150150150180 180
Sulfur8787878750505050
Diphenylguanidine22222222
Magnesium oxide1515151515151515
Kaolin5050505050505050
Paraffin1010101010101010
Alloy phthalic
anhydride with FLC**22222222
Soap44444444
Vaseline oil2323 232323232323
Waste production
BVK180
Proven
the ion-exchange resin
based on:
KU-23,
fraction, µm: 1÷40180Ȋ
KU-2-20,
fraction, µm: 1÷40270
KU-2-8,
fraction, µm:
1÷40360360360
1÷80360360
Note. * The best choice in emulsion rubber SKS - ARKM-15 the oil content of MO-6 is 14.5-of 17.0 wt.%.
** SJK - synthetic fatty acid fraction17-C20

Table 2.
Plastoelastic indicators ebonite mixtures and physico-mechanical properties of vulcanizates based on them
NameQuantitative values prototypes
indexRegulatoryKnown1234567
The plasticity
Carrera0,3-0,550,450,490,480,450,470,460,450,46
The Mooney viscosity, usled60-80-68727875717976
Fragility, MJ/m3not less 0,0650,0670,0750,0750,0700,1100,0950,0700.060
Bending, MPanot less than 21,0 2834333239322926
Hardness, MPanot less than 70.0100108121124118119112112
Heat according to Martens, °not minee6668666669656662

Ebony mixture of butadiene-styrene rubber, including reclaim CT, sulfur, diphenylguanidine, magnesium oxide, kaolin, paraffin, alloy phthalic anhydride with alcohols, Soaps, surfactants, liquid paraffin, and as filler - production waste, characterized in that the filler used is pre-crushed to a fraction of 1-40 μm waste ion-exchange resin is a cation exchange resin KU-2 is a product of copolymerization of styrene and divinylbenzene with grafted sulfopropyl in the amount of from 180 to 360 parts by weight in the following ratio of components in ebony mixture, parts by weight:

rubber SKS-ARKM-15100-115
reclaim CT150-180
sulfur50-87
diphenylhexane the Ying 2
magnesium oxide15
kaolin50
paraffin 10
alloy phthalic anhydride with SJK2
soap is a surfactant4
vaseline oil23
spent ion-exchange
resin is a cation exchange resin KU-2 fraction, µm: 1-40180-360



 

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