AMS應用於汽車輪胎

sherman

AMS用于汽车轮胎
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ARIZONA SA-85 resin（Poly α- METHYL STYRENE）用于NR、BR、SBR、IIR、EPDM、NBR/PVC、CR&TPE（热可塑性弹性），作为补强剂及扩展剂 ，使操作容易赋予较高之抗张力及良好之色泽稳定性和耐热老化性。
/ d4 O8 A- H% _ARIZONA SA-85 resin 用于SBR汽车轮胎可以提供以下好處 ：
  z7 E7 H! Z. E" U1 ~1.        乾濕地操控性較好
2.        轮胎發熱性比較低, 改善内部温度调节
3.        滾動阻抗低,輪胎磨損較低,可以節省油料損耗
4.        於配方中加入SILCA(白煙)與SA-85 resin
) `  I0 x; F9 V/ r(1)        於0℃下黏彈性較高, 操控性較好,抓地性較好
3 ^& r! v3 c; e; G& v(2)        於50℃下黏彈性較低, 滾動阻抗較低
配方如下:
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5 @0 f, {2 u8 sSample        X        Z
SIBR1        90        85
$ X( h. {. r$ q( D* p: D  H3 QStyrene/alphamethylstyrene2        9        8
# \9 E  f1 U5 C3 N0 R0 M# _BR3        10       
" [4 G+ e# k% b" ?8 \. W0 z  ~+ k
Natural Rubber4        10        5
9 o4 Z) g$ Z) K& f4 eProcessing Oil5        38.8        36.25
% ]$ |* C: @* q6 ]7 nZinc Oxide        4        4
Fatty Acid        3.5        3.5
Antioxidant6        2.75        2.75
Silica7        40        40
Carbon Black        48        48
; B6 E1 ?9 \: S9 I$ sCoupling Agent8        8        8
  H* s2 `5 c! X1 tProductive Mix Stage
3 R9 h/ Z$ y' o6 _/ ~Sulfur        1.4        1.4
Sulfenamide and Guanidine        4.2        4.2
% D# k/ Y& n; w' ^! m5 D3 {: s! `( AType Accelerators               
9 {' D8 \% v; S, L& b' G$ W. I
* l: Z! o4 Q0 S% `. ~     .sup.1 the SIBR had a Tg of about -25.degree. C.; and composed of about 2 percent bound styrene, about 50 percent bound isoprene and about 25 bound butadiene;
2 O' Y2 g  z- ]0 h     .sup.2 styrene/alphamethylstyrene resin obtained as SA-85 from the Arizona Inc. company and reportedly having a softening point of about 85.degree. C. and a Tg of about 39.degree. C. and being composed of about 60 percent units derived from styrene and about 40 percent units derived from alphamethylstyrene;
2 u  B8 e" e+ f, }. V# Y# c     .sup.3 cis 1,4polybutadiene rubber obtained as Budene .RTM. 1254 from The Goodyear Tire & Rubber Company;
     .sup.4 natural rubber (cis 1,4polyisoprene);
& n/ ~: M2 K( |5 ?6 j     .sup.5 rubber processing oil as being 22.5 parts in SIBR, where the amount of SIBR is reported above on a dry weight (without the oil) and in addition, about 16.3 parts additional rubber processing oil were added;
2 z5 ]4 @# ^5 Y1 ^     .sup.6 of the paraphenylene diamine type of antidegradant;
     .sup.7 a silica obtained as Zeosil 1165MP from the RhonePoulenc company, and reportedly, having a BET surface area of about 165 and a DBP absorption value of about 260-280; and
     .sup.8 bis3-triethoxysilylpropyl)tetrasulfide (50% active) commercially available as X50S from Degussa in a 50/50 blend of the tetrasulfide with N330 carbon black (thus, considered 50% active). Technically, the tetrasulfide is understood to be an organosilane polysulfide as a composite, or mixture, in which the polysulfide bridge contains an average of about 3.5 to about 4 connecting sulfur atoms, although an individual sulfur bridge in the composite or mixture may contain about 2 to about 8 connnecting sulfur atoms.

Sample        X        Y (Control)        Z
Rheometer (150.degree. C.)
Max. Torque        35        30        32.8
( R* \) I1 N% OMin. Torque        8        8.5        8
4 T$ o2 f; Y2 w* Q/ q7 dT.sub.90, minutes        10.2        10.4        10.2
1 o" M" E: [) @4 LT.sub.25, minutes        6.9        8.4        7
Stress-Strain
+ I$ v% u& R% cTensile Strength, MPa
        14.4        13.6        14.1
% o" d! p7 i5 S  C' W( R9 d1 C# S. AElongation at Break, %        400        557        370
% n& Y. g1 i) G4 P) n100% Modulus, MPa        2.5        1.7        2.5
' l' u, z( `; D( W, D+ B300% Modulus, MPa        11.75        7.3        12
% Q- h6 a5 F7 H, pRebound
8 b+ Q6 w+ p1 M% E0 N100.degree. C. (%)        57        38.5        60
23.degree. C. (%)        14.5        13.5        18
& B# t% [, Z, e7 p; J* [Hardness (Shore A)                       
7 U( {+ |, E5 Q8 V23.degree. C.        65        64.5        65
Dynamic Mechanical Properties
G* Stiffness @ 50.degree. C., MPa        4.7        7.65        4.4
Tan.Delta at 50.degree. C.        0.078        0.117        0.073
- a+ y+ U0 n# lTan.Delta at 0.degree. C.        0.65        0.42        0.56
7 c$ O) \( }$ N  zG* Stiffness at 0.degree. C., MPa        17.2        29.7        11.6
4 N' l" B2 d' ^* ]  N, W+ F# GHeat Generation (.degree.C.)        33.8        52.5        31.3

Tire Properties        X        Y (Control)
Rolling Resistance        112        100
Wet Handling        106        100
3 x/ L$ G1 e# M* n4 d2 l3 dWet Skid        106        100
Wear        94        100
Dry Handling        100        100
$ d1 r" v& R. O4 L; w在欧洲，AMS已被倍耐力、普利斯通、固特异和米其林等公司广泛采用。
建议使用量：8~10 phr。

Relevant Patent(AMS resins for car tire)
  K1 `6 P9 E8 C& f1 z" `+ eUS patent #4,487,892 (Bridgestone, 1984)
* ]( Z) l, E7 \4 [$ _High driving performances (i.e. improved controllability & stability during high speed running).
% D6 b5 d1 q% {9 }* f' E; xSatisfy two contradicting properties, controllability (improved hardness) and stability/grip/cornering (increased hysteretic loss).
! e, ^1 r( c* mUS patent #5,446,097 (Mitsui, 1995)
& d0 y7 O* ]8 i" o3 fVulcanized rubber composed of (a) conjugated diene rubber, (b) ethylene alpha-olefin copolymer and (c) styrene oligomer.
Provide excellent weather resistance, heat aging characteristics and mechanical strength
% r: f$ n1 p+ @' ^% U! ~& A# |US patent #5,877,249 (Goodyear, 1999)
Pneumatic tire composed of diene base elastomers, carbon black, silica & AMS resin.
: P9 c( O, c& S! |( H) ^Combination of carbon & silica enhance wet & dry traction, but maintaining rolling resistance.
AMS resin increases tan delta (0o~20oC), but retains high storage modulus at high temperature (25o~100oC
8 s6 K, L6 R1 ~* c/ ~( h9 BUS patent #6,469,101 (Pirelli, 2002)
Tread of a low rolling resistance at normal tire use temperature and high grip (road holding) at higher temperature.
) q- ?$ a& p+ k* S! X& E0 ]7 ?AMS resins, e.g. Kristallex® F-85 & Endex® 155.
US patent #6,525,133 (Goodyear, 2003)
Pneumatic tire (for traction) with a rubber tread (diene base rubber) which utilizes AMS oligomer.
AMS resins provide traction (i.e. handling, grip, cornering, particularly, skid resistance) at high temperature.

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资料不错，轮胎的东西是橡胶的主流。