The method of producing vulcanizates based emulsion copolymers of butadiene with acrylonitrile or styrene or- methylstyrene

 

(57) Abstract:

The invention relates to a process for the production of vulcanizates based emulsion copolymers of butadiene with Acrylonitrile, or styrene or a-methylstyrene and can be used for the manufacture of hoses, seals and other rubber products. The copolymer is treated before putting ingredients in a mixing roll mill at 25-45C within 60 to 120 minutes Then injected accelerators, antioxidants, fillers, plasticizers, vulcanization activators, sulfur. The vulcanization is carried out in the press at 141-S 40 minutes the Technical result consists in the improved frost resistance of vulcanizers. table 1.

The invention relates to a process for the production of vulcanizates based emulsion copolymers of butadiene with Acrylonitrile, or styrene or a-methylstyrene and can be used for the manufacture of hoses, seals and other rubber products.

The vulcanizates based emulsion copolymers of butadiene with Acrylonitrile, or styrene or-methylstyrene derived from rubber mixtures prepared by successively introducing into processed on mixing rolls for 1 to 20 min rubber ing is acting agents (N. In. Belozerov. Technology of rubber. - M.: Chemistry, 1979, S. 112-117, 129, 130, 300, 301).

However, this method does not provide vulcanizates based emulsion copolymers of butadiene with Acrylonitrile or styrene or a-methylstyrene with the required level of performance at low temperatures, determined by the coefficient frost resistance under tension.

The technical result of the invention is to improve the frost resistance of vulcanizates based emulsion copolymers of butadiene with Acrylonitrile, or styrene or a-methylstyrene.

The technical result is achieved by the fact that the applied method of producing vulcanizates based emulsion copolymers of butadiene with Acrylonitrile, or styrene or a-methylstyrene by processing, mixing roll mill, followed by the ingredients for the preparation of rubber mixtures and its vulcanization, which differs in that the processing of the copolymers to the input of the ingredients is carried out at a temperature of 25-45C within 60 to 120 minutes

The method is as follows.

To enter the ingredients are processed in a mixing roll mill emulsion copolymers of butadiene with Acrylonitrile or styrene, or metals the teli, antioxidants, fillers, plasticizers, vulcanization activators, curing agents. The surface temperature in the middle part of the rolls rollers is measured using thermograph thermometer or a thermoelectric contact. As copolymers of butadiene with Acrylonitrile use rubber stamps BNX (TU 38.30313-98) or NITRILES (TU 38.40350-99) or SKN-CHT (TU 38.103488-89 or THE 38.40375-2001). As a copolymer of butadiene with styrene using rubber stamps SCS-ARC (GOST 15627-79). As a copolymer of butadiene with-methylstyrene use rubber stamps SCMS-RK (TU 38.40365-97). Sulfenamid C (TU 6-14-868-77), thiazole MBS (TU 6-14-851-79), guanidine f (GOST 40-80) are used as vulcanization accelerators. As antioxidants used aldol-naphtylamine (GOST 830-75), deafen OP (TU 6-14-817-76), paraoxonase (TU 6-14-558-76). As fillers used carbon black grades P 324, P, P 803 (GOST 7885-86). As plasticizers can be used dibutylsebacate (GOST 8728-77), dibutyl phthalate (GOST 8728-77), oil-softening agent for rubber industry "MP-604 (TU 38.40168-81). Stearic acid (GOST 6484-96) and zinc white (GOST 202-84) are used as vulcanization activators. As the vulcanizing agent used different rubber compound vulcanized in the press at 1421C for 40 min and conduct complex testing of vulcanizates.

Example 1. (comparative) To input ingredients are processed on mixing rolls at 40C for 20 min 100 wt.h. copolymer of butadiene with Acrylonitrile brand BNX-ANN. Then enter ingredients: 1.5 by weight.h. sulfenamide C, 1.5 wt.h. thiazole MBS, 0,25.h. guanido f, 2.0 wt.h. aldol-naphtylamine, 1,0 wt.h. diafana OP, 1,0 wt.h. paraoxonase within 2 minutes After that enter 60 wt.h. carbon black P 803, 20 wt.h. dibutylsebacate for 8 min, injected with 1.0 wt.h. stearic acid for 2 minutes Introduction 5.0 wt.h. zinc oxide for 3 min and 1.2 wt.h. sulfur within 2 minutes the resulting mixture was stirred for 2 min, and make the cut.

Example 2. The method is carried out analogously to example 1, but prior to entering ingredients are processing 100 wt.h. copolymer of butadiene with Acrylonitrile brand BNX-AN on mixing rolls at 40C for 60 minutes

Example 3. The method is carried out analogously to example 1, but prior to entering ingredients are processing 100 wt.h. copolymer of butadiene with Acrylonitrile brand BNX-AN on mixing rolls at 40C for 90 minutes

Example 4. The method is carried out analogously to example 1, but prior to entering ingredients are processing 100 wt.h. SS="ptx2">Example 5. (comparative) To input ingredients are processed on mixing rolls at 40C for 20 min 100 wt.h. copolymer of butadiene with styrene brand SCS-ARK. Then enter ingredients: 1.5 by weight.h. sulfenamide C, 1.5 wt.h. thiazole MBS, 0,25.h. guanido f, 2.0 wt.h. aldol-naphtylamine, 1,0 wt.h. diafana OP, 1,0 wt.h. paraoxonase within 2 minutes After that enter 60 wt.h. carbon black P 803, 20 wt.h. DBS for 8 min, and 1.0 wt.h. stearic acid for 2 minutes Introduction 5.0 wt.h. zinc oxide for 3 min and 1.2 wt.h. sulfur within 2 minutes the resulting mixture was stirred for 2 min, and make the cut.

Example 6. The method is carried out analogously to example 5, but before you enter ingredients are processing 100 wt.h. copolymer of butadiene with styrene brand SCS-ARC on mixing rolls at 40C for 60 minutes

Example 7. The method is carried out analogously to example 5, but before you enter ingredients are processing 100 wt.h. copolymer of butadiene with styrene brand SCS-ARC on mixing rolls at 40 C for 90 minutes

Example 8. The method is carried out analogously to example 5, but before you enter ingredients are processing 100 wt.h. copolymer of butadiene with styrene brand SCS-ARC on when the processing on mixing rolls at 40C for 20 min 100 wt.h. copolymer of butadiene with-methylstyrene brand SCMS-RK. Then enter ingredients: 1.5 by weight.h. sulfenamide C, 1.5 wt.h. thiazole MBS, 0,25.h. guanido f, 2.0 wt.h. aldol-naphtylamine, 1,0 wt.h. diafana OP, 1,0 wt.h. paraoxonase within 2 minutes After that enter 60 wt.h. technical carbon P, 20 wt.h. DBS for 8 min, and 1.0 wt.h. stearic acid for 2 minutes Introduction 5.0 wt.h. zinc oxide for 3 min and 1.2 wt.h. sulfur within 2 minutes the resulting mixture was stirred for 2 min, and make the cut.

Example 10. The method is carried out analogously to example 9, but before you enter ingredients are processing 100 wt.h. copolymer of butadiene with-methylstyrene brand SCMS-RK on mixing rolls at 40C for 60 minutes

Example 11. The method is carried out analogously to example 9, but before you enter ingredients are processing 100 wt.h. copolymer of butadiene with-methylstyrene brand SCMS-RK on mixing rolls at 40 C for 90 minutes

Example 12. The method is carried out analogously to example 9, but before you enter ingredients are processing 100 wt.h. copolymer of butadiene with-methylstyrene brand SCMS-RK on mixing rolls at a temperature of 40 C for 120 minutes

Example 13 (comparative).

Example 14. The method is carried out analogously to example 13, but before you enter ingredients are processing 100 wt.h. copolymer of butadiene with Acrylonitrile brand BNX-AN on mixing rolls at 25 C for 60 minutes

Example 15. The method is carried out analogously to example 13, but before you enter ingredients are processing 100 wt.h. copolymer of butadiene with Acrylonitrile brand BNX-AN on mixing rolls at 25 C for 90 minutes

Example 16. The method is carried out analogously to example 13, but before you enter ingredients are processing 100 wt.h. copolymer of butadiene with Acrylonitrile brand BNX-AN on mixing rolls at 25 C for 120 minutes

The rubber mixtures according to examples 1-16 vulcanized in the press when S within 40 mi is, which is one of examples 1-16, in terms of relative strength, relative elongation, coefficient frost resistance under tension, the viscosity of rubber compounds.

The table shows that the method of producing vulcanizates based emulsion copolymers of butadiene with Acrylonitrile or styrene or-methylstyrene, processed on mixing rolls at 25-45C within 60 to 120 min with subsequent input of ingredients to prepare a rubber compound and vulcanizing, increases the frost resistance of vulcanizates based on them.

The method of producing vulcanizates based emulsion copolymers of butadiene with Acrylonitrile, or styrene or a-methylstyrene by processing the copolymer in a mixing roll mill, followed by the ingredients for the preparation of rubber mixtures and its vulcanization, wherein the processing of the copolymers to the input of the ingredients is carried out at a temperature of 25-45C within 60 to 120 minutes

 

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