SU971849A1 - Vulcanizable composition based on unsaturated rubber - Google Patents

Description

The invention relates to the rubber industry, in particular, to the field of rubber processing and can be used in the tire industry.

Known vulcanizable composition based on unsaturated rubber, including a modifying additive to improve the technological properties - blocked thiophenols, coJBMecTHO with polyols or polyamines, isocyanate-containing oligomer (blocked polyisocyanate) fl However, if used in this composition as co-agents of compounds 3, 3-di-dichloromeric fl), 3-Z-dichlorohydrin fl. , 4-diaminodiphenylmethane 4,4,4,4-triamivotriphenylmethane, tetraoxypropylethylenediamine, glycerol, only a polydiene chain is lengthened, and the resulting g terotsepnogo polymer with makrsmolekul p | GOVERNMENTAL chains elastomer constituting w {conductive base composition to form a uniform vulcanization structures it is not possible. The poetical theme of the mechanical properties of such compositions does not change significantly.

The purpose of the invention is to increase the stability of the properties of the composition (Shine-.

processability, increase in heat, temperature resistance, fatigue endurance, resistance to spreading and puncture.

This goal is achieved by the fact that a vulcanizable composition based on unsaturated rubber, including a modificant additive — an isocyanate 10 blocked by a phenol derivative containing an oligomer, contains as a modifying additive a blocked phenotropin 1; an isocyanate containing liquid oligodien (FL-65) interacting product;

15 holding oligomer based on divini-la and isoprene in a ratio by weight of 80:20 with toluene diisocyanate and additionally a compound selected from the group: disulfide alkylphenol20 formaldehyde resin (DSAFPS) JH, L-metafenylene-maleimide (MFDM) pyromethyramine-pyramine-pyramine-pyramine-pyrene; ), in the amount of 5-15 and 0.7-3 mas, respectively. on 100 ma.ch. rubber

25

Physical and chemical studies have established that the reaction of the liquid isocyanate-containing rubber OP-65, blocked by phenotropin with cross-linking agents, can

30 is carried out only when the compositions are heated in the range from 1:40 am, which ensures that the properties of the oligodiene remain stable when exposed to elevated temperatures of 120-130 ° C. Hetero-chain polymers that form SPs during heating with systems made of oligodiene and cross-linking agents, jTOBf, have rubber-like. type F is insoluble in solvents and is characteristic. high softening temperature (360-380 С). In the proposed composition, co-heps that extend the oligomeric chain are involved in the attachment of the growing oligodien chain to the elastomer, allowing the goth to implement, along with sulfuric, more propellant and flexible bonds in the volcanic structure, and to obtain compositions with a new set of technical properties: high heat -, temperature resistance, increased fatigue endurance, increased tearing and puncture resistance Due to the fact that the density of the volcanic net of compositions in this case increases significantly, the volcanic content lowering agents (sulfur, N, K-dithiodimorpholine} and will accelerate vulcanization (sulfenamide) can be significantly reduced. Production of rubber mixtures under laboratory conditions is produced in two stages in a 2-liter rubber mixer. Duration 1 st century. at 60 rpm - 4 MHHi Liquid isocyanate containing rubber, blocked by phenotroiin, is introduced into the first stage. The temperature at the end of the cycle is within 140mixing and .5 C. Zudcanizing group sulfur, DTDM, sulfenamide) K – E Itrozodipheny amine and structuring agents (DSAFFS, GHPK, IMFM, P - NDFA) is introduced into the rubber mixer in the second stage at 30 rpm. Duration see sheni 2 min. The temperature at the end of the mixture is within the range of lOS-llO C. The mixtures are vulcanized in a press for 50 minutes. Example. Prepare a MyVo vulcanized composition with the following formulations given in Table 1. (Components in. h., m.p. or im.d.) In a composition based on 35 Nas, h. LC introduced liquid isocyanate-containing rubber; to FP-65,: blocked fen tropin / in an amount of 5–15 masCh (preferably but 10 mph), and as a structured acetone. s; compounds of dislfidalkylphenol and g / g:; 1 kg (; resin; 1–3 parts by quantity (g redno - fTnTejibHo 2); g; V /; W-hexachloroparaxylene with O; 7 In May, a comparison of isgovotov tomposgiytsiyu with an example of 1 FCP-65 isocyanate-containing rubber in an amount of 5-15 parts per hour, respectively, Fi quality in the first half of the second, 2 presents the properties of compositions based on 35 May, h NK, manufactured by ya 3 a n n u m u r e c e n t y. PRI me R 2 Composition on the basis of 35 ma.d (ma.h.) NK, introduces liquid isocyanatsoder-JE .shchny i-Sauchuk OP - 65, blocked by fe 1 irop ;; g; m, - in in the amount of 10 parts by weight and as a structuring compound N,.: (; tafenilan.lk of small groups of people in eccjiij; cass.h. as a prize-winner in; abl. 3 representation of the properties of comgOIC11K; for osegove 35 May, h EC, manufactured according to the indicated recipe. Example: 35 ka.pso kipozipiyu esc. tK is administered with iococyanatopropyl rubber OP-b3, blocked by phenotropin in the amount of 100 May, h, and as a CI structure of the 10th compound pair the nitrosode: -; 6 ::; L amine in the amount of 1.5. As an example, r ia6. I i 4 the properties of the com patio ntion on the basis of 35 may be given. CHK, - manufactured according to uk 3 aKHOfiy} znAchptus .. with the creation of a ziozki, kk moditskshiruyuschey system on the basis of LCD 11: iz iso-cyan tsoderzhaschego: tauchuka FP-65 blocked by phenetropkomnom, it is possible to use: 3 as a temporary plasticizer of the composition and to improve its tehnolochichesky properties of Glasticity, accompanied by 1e psvvulcanization. extrinsicity 1, so l: a; The selected coagents of the interaction with the reaction stage of volcapitalization significantly improve the level of vulcanizates at deformations of the bend, and stretch, increase the body, temperature-resistant) and thereby extend the temperature range of work products; to increase the resistance of rubber to tearing and puncture, which is of particular importance for increasing the efficiency of working with rubber: horn and ox-ti b aria car tires of 27-40 tons in a quarry. Composition of vulcanized compositions, maf

Table

Technical carbon PM-100

50

50

50

50 Mechanical properties of compositions based on NK + SKI - 3

Uncured mixtures ductility according to GOST 415-75 0.35 Time of basement-lowering at 120 C tr min + 5 min 23

Rubber Tensile stress at elongation of 300%, MPa Strength conditional at stretching, MPa26 at NU at 100 17 after aging 100 ° x 72 h 18. Elongation at break ,. at NU, at 100, with aging 100 X 72 h. Resistance to razeur, kN / m, at Hardness, conventional units, at NU at 100 °; Elasticity,% at n. with SO. 0.39 T a b i y of aa 2 combinations 0.380.40 0.40 15.6 15.5 4.7 6.9 6.7 Fatigue endurance with repeated. stretching by 150% kTs 40 45 Conditional stress at static puncture, MPa73.0 Resistance to crack propagation during repeated bending, thousand cycles. 150 Fatigue endurance at FAT, thousand cycles at .998

Mechanical properties of compositions based on

Unvulcanized mixtures

 min ± 5 min Continued table. 2 78.080 180150

Table 3a NC and SKI-3

0.37 0.38

28

Conditional stress at elongation 300%, MPa

Conventional tensile strength, MPa

at n.

at 100 °

after aging 100

X 72 h

Relative elongation at break,%

at n. ,

at,

after aging 100 x 72

Tearing resistance kN / m, when n.

Hardness, conventional units

at n.

at 10 ° C Elasticity /%

at n.

With loVc

Fatigue endurance prk repeated stretching by 150%, thousand cycles | static stress at static puncture, MP

Resistance is developed

multiple cracks

bending, thousand cycles

Wrist endurance on Zoi, thousand cycles

, Continued table. 3

15.6

27.0 17.8

19.0

530

580

260

135

74 65

44 59

51 75.0

185,100

Mechanical properties of compositions based on NK and SKI-3

Plasticity according to GOST 415-75

We're trying to vulify

120s1min + 5 min

Conditional voltage at

elongation 300%, MPa

Conventional tensile strength, MPa

at n.

at

after aging 72 h

Relative extension

at break,% at NU

at n.

at

in after aging 100. x 72 h

Tear resistance, kN / m

at n.

Hardness, conventional units

at n.

at

Elasticity,%

at n.

at

Fatigue endurance pr

multiple stretch on

150%, thousand cycles

Conditional stress at stapal puncture, MPa

Table 4

Uncured mixtures 0.38

0.37 28

15.5

26.5 18.5 19.2

530 515 251

130

74 63

44

59

60

77.0

Indicators

Resistance to the growth of cracks during repeated bending, thousand cycles

Fatigue endurance at FAT,

Claims (1)

thousand cycles at 100 ° C. Formula of the Invention A vulcanizable composition based on unsaturated rubber, comprising a modifying additive — an isocyanate-containing oligomer blocked by a phenol derivative, a tol and an hour; and y (so that, in order to influence the stability of the properties of the composition, the latter contains blocked 1 as a modifier additive; the phenotropin isocyanate-containing liquid oligodien is the product of the interaction of a hydroxyl-containing oligomer 220 1500 on the basis of divinyl and isoprolen in a weight ratio of 80:20 with toluene diisocyanate and additionally a compound selected from the group; disulfide 1sylphenol formaldehyde resin, S, M-metaphenylene di maleimide, para-nitrosodiphenylamine in an amount of respectively 5-15 and Or 7-3 wt.h. on, h rubber (Sources of information taken into account during the examination 1. USSR Author's Certificate It 410037, Cl. Q 08 L 9/00, 1971 (prototype).