SU1244153A1 - Butadiene copolymer with methacrylamide and dimethylvinylethinylmethyl-tert-butylperoxyde showing adhesive properties to cord and rubber - Google Patents

Abstract

Butadiene copolymer - methacrylamide and dimethylvinyl ethylmethyl - tert-butyl peroxide of the general formula of cncc-c (c-c1x 2-o-cn cng with mol.m. 102000-136000, exhibiting adhesion to cord and rubber . s (L yu 4ik JV CO

Description

, 41244153

 ,

The invention relates to new high-molecular compounds, concrete, etno to copolymers of butadiene, methacrylamide and dimethylvinyl ethylmethyl-tert-butyl peroxide, and can be used in the petrochemical industry, and copolymers exhibiting adhesive properties to rubber and cord, as the basis of an impregnating compound for fixing artificial or synthetic cord (fabrics) to rubber in the tire and rubber industry.

Example 1. In a bottle or ampoule purged with argon, the reaction mixture is loaded with the following composition:.

MA.CH.G 100 167.8 3 5.034

) 0

Butadiene-i, 3

Methacrylamide

Dimethylvinyl ethylmethyl tert-butyl 1-oxide

Isopropylbenzene hydroperoxide

Tert-dodecyl mercaptan

0.65

Trilon B0.06 Iron (II) sulfate o; 03 RongalitO, 2 Trisodium phosphate 0 2 Leukanol 0.5 Kaliev

salt SZhK7,0

Water200.0

3.85

0.63 1.14 0.106

0.053 0.275

0.353 5.66

53.3 336.0

15

20

25

thirty

35

water tio 0.1 pa a in

met scoop to merbic benthus dims per half sex 880 count 976 ter winners

feet ki

with

40

Firstly, the aqueous phase consisting of calculated amounts of water, emulsifier, leukanol and tri-sodium phosphate is loaded. A 10% strength is added: an aqueous solution of methacrylamide and, after pre-cooling, peroxide monomer, regulator, initiator, butadiene and thermostatting the reaction mixture at 15 ° C are loaded. After preliminary emulsification, iron solutions are introduced into the system for 1 h. trilonovogo complex and rongalita.

The polymerization process is controlled by dilatometric or dry residue. For 24 hours, the conversion is 96% by weight.

five

0

five

0

five

 At the end of the experiment, an aqueous solution of sodium stopper, sodium dimethyldithiocarbamate, is added to the latex at the rate of 0.15 wt.h. on 100 ma.ch. copolymer. The residual butadiene is distilled off in vacuum at 40-50 ° C.

The resulting peroxide butadiene-methacrylamide latex (BAMKP-3/2) contains a dry product of 32.7%, has a pH of 10.7 and surface tension, 50.1 dyne / cm. The mechanical stability of the latex is 2.8% of the coagulum on dry substance. The purified copolymer has a mol.m. 102000, intrinsic viscosity 1.08 dl / g (25 ° С, benzene) and contains units, mol%: buta, 97.65; methacrylamide 1.75; dimethylvinyl ethyl tert-butyl peroxide 0.60. The copolymer is soluble in benzene, toluene, and other solvents. In the IR spectra, absorption bands were observed in the regions: 880 cm, attributed to the valence vibrations of the peroxide group: 920, 976, 1310, 1410, 1660 cm, which characterize the vibrations of nonconjugated vinyl bonds; 1620, 1650 cm% characterizing the bond in amide-. Noah group; 2300 cm, characterized by triple bond oscillations.

 The results of using the specified latex for the adhesive impregnation of the cord are given in Table 1, I, and 2. Table 2

The bond strength of the cord is 23 CNTs at

content of condensed resin

SF-280 - 20 sat.

Rubber SKI-3 control

Peroxide,

BAMKP-3/2 120 86

Peroxide,

BAMKP-3/3. 124 91

Pyperoxide

analogue of BDMK-3 99 72

Industrial standard (a mixture of latexes SKD-1 and D GOP-YuH at a ratio of 70:30) 54 43

Continuation of table

Rubber SKI-3, modified active additives

Peroxide,

BAMKP-3/2. .150

Peroxide,

BAMKP-3/3 161

Industrial

reference (mixture

LatexBB SKD-1

and DMVP-YuH in

ratio

70:30) .138-

 T a b l Tensile strength of the modified rubber SKI-3 with a cord SVM

.20 199 189

20,202,187

20 150 112 20 95 111

) 20123, 121

Continued .tab.2

ten

20

105,126

15

Divinylcarboxyl nitrile (BNK-5 / 1.5) 20

Peroxide divinylcarb-oxylnitrile-, ny (BNK-5/1, 5P-4) 20

9 110

138

124

0

five

0

five

0

five

1, Example 2. Analogously to Example 1, the aqueous phase and the initiating system are prepared and the copolymerization process is carried out with the following composition of the initial mixture:

ma.ch.

100

3

g

167.2- 5.016

1.3-butadiene

Methacrylamide

Dimethylvinyl ethyl tert-butyl peroxide 3 5, .00

Tert-dodecyl mercaptan. 0,60 1,059

Hyperperoxide

isopropyl benzene, 28 0.55

For 24 hours, the conversion is 98% by weight.

. The synthesized peroxide butadiene methacrylamide latex (BAMKP-3/3), contains 32.2% of the dry residue, has a pH of 10.8, and a surface tension of 49.2 dyn / cm. Mechanical stability of 2.6%. The purified copolymer has a mol.m. 128,000, intrinsic viscosity 1.16 dl / g and contains units, mol%: butadiene 97.35; methacrylamide 1.77; dimethylvinyl ethenylmethyl tert-butyl peroxide 0.88. The IR spectrum of the copolymer is identical to that described in Example 1.

Example According to the method and formulation described in Example 1, the aqueous phase and the initiator system are prepared. The copolymerization process is carried out analogously to example 1 with the following composition of the initial mixture:

ma.ch, g

Butadiene-1,3,100 166,6 Methacrylamide 3 5,153 - Dimethylvinyl-ethynylmethyl-tert-butyl peroxide 4. 6.66 Tert-dodecyl- -. mercaptan 0.50 0.89, isopropyl benzole hydroperoxide 0.30 O, 58.

Over 24 hours conversion is 95% by weight.

The synthesized peroxide butadiene necrylamide latex (BAMKP-3/4) contains 31.4 wt.% Of the dry residue, has a pH of 10.7, and the composer V. Filimonov Editor K. Voloshchuk Tekhred O, Sopko - Corrector. Shekmar

 - - - “----. - -. “. and. , .And „,„ and t - ““ - .. - ““ .-- ™ ,, “., M, ™. .. ". ,ME AND .."..

Order 3770/26 Circulation 470 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Design, 4.

surface tension 48.0 / d / cm. Mechanical stability 3.1%. The purified copolymer has a mol.m. 136,000, intrinsic viscosity 1.40 dl / g and contains units, mol%: -butadiene. 97.10; methacrylamide- yes 1.69; Dimethyl propylene-methyl-tert-butyl peroxide 1,21. The IR spectrum of the copolymer is identical to that described in Example 1.

. From the data given in table. 1 and 2, it can be seen that the bond strength of the CNT cord 23, impregnated with an adhesive based on peroxide butadiene methacrylamide latex, with SKI-3 rubber, increases in comparison with the adhesive based on nonperoxide buttadiene methacrylamide latex and exceeds the bond strength a cord impregnated with a known latex (a mixture of SKD-1 latexes and in the ratio of 70:30. In addition, the strength of the connection between the modified rubber SKI-3 and the CBM cord increases.

Claims (2)

Butadiene copolymer with methacryl amide and dimethylvinyl ethylmethyl — tert-butyl peroxide of the general formula Sun-Sun-Sun Sleep, - ^ [Sun-Sun, 1 ¹ Passed (where η = 97,10-97,65 mol. ^; with mol. m. 102000-136000, showing t = 1.69-1.77 mol.%; adhesive properties to the cord and rivers = 0.60-, 1.21 mol%, zine. but 1244153 one 1244153 2