AMS應用於汽車輪胎

sherman

AMS用于汽车轮胎
* I: z' U' {7 a8 U. ~
2 R8 k/ r6 L1 @! S- A7 M! ?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。
& S9 @2 b& Z+ P! N9 m$ I) V# m2 }2 [ARIZONA SA-85 resin 用于SBR汽车轮胎可以提供以下好處 ：
* f. C! |$ A/ N+ H7 P1.        乾濕地操控性較好
+ O! v9 m. Q' f- Z2.        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
(1)        於0℃下黏彈性較高, 操控性較好,抓地性較好
(2)        於50℃下黏彈性較低, 滾動阻抗較低
配方如下:

. Z1 v, E! X, F+ e* F
5 @& _8 C: ~. z; G1 k; p0 q/ qSample        X        Z
SIBR1        90        85
9 }' g6 a& |  ?2 q( kStyrene/alphamethylstyrene2        9        8
# h# {2 _$ B% FBR3        10       

" h2 T3 n* Q4 F( h0 YNatural Rubber4        10        5
Processing Oil5        38.8        36.25
Zinc Oxide        4        4
Fatty Acid        3.5        3.5
( s+ p- L4 J$ `' e1 d8 s3 ?4 _3 EAntioxidant6        2.75        2.75
5 e. J/ m! \$ \8 y+ ]( DSilica7        40        40
Carbon Black        48        48
Coupling Agent8        8        8
5 I+ l3 i$ V9 F! [3 Z1 |/ JProductive Mix Stage
4 J5 I/ @9 i/ o( Q+ k1 h2 Y1 }" tSulfur        1.4        1.4
5 T( m+ |0 ~& {+ b# {5 MSulfenamide and Guanidine        4.2        4.2
3 R) N' s9 z5 _8 C0 gType Accelerators               
0 @9 p4 v) I( Y8 B& P4 h
& A7 ?* ^: B( g     .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;
+ y' p" V& c1 [& Y0 F     .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;
  T7 f, t2 N! f7 c. m: l     .sup.3 cis 1,4polybutadiene rubber obtained as Budene .RTM. 1254 from The Goodyear Tire & Rubber Company;
& Y- V( }* S4 \: M' U0 z4 ?: D/ q     .sup.4 natural rubber (cis 1,4polyisoprene);
: j  \, v2 Y. Z2 l+ B  o+ N  ~! X     .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;
     .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
Min. Torque        8        8.5        8
T.sub.90, minutes        10.2        10.4        10.2
T.sub.25, minutes        6.9        8.4        7
$ M2 [8 v9 l! h0 M7 }* cStress-Strain
2 H+ D; b- l/ r5 n+ |, uTensile Strength, MPa
# M- G) w4 M$ o' y( a% p6 N        14.4        13.6        14.1
Elongation at Break, %        400        557        370
100% Modulus, MPa        2.5        1.7        2.5
300% Modulus, MPa        11.75        7.3        12
Rebound
100.degree. C. (%)        57        38.5        60
23.degree. C. (%)        14.5        13.5        18
Hardness (Shore A)                       
23.degree. C.        65        64.5        65
Dynamic Mechanical Properties
* y; x) l+ l0 ^. u6 }1 yG* Stiffness @ 50.degree. C., MPa        4.7        7.65        4.4
2 A3 |  K0 S- J9 ^- Q. nTan.Delta at 50.degree. C.        0.078        0.117        0.073
/ W) t! |0 U) U9 |* tTan.Delta at 0.degree. C.        0.65        0.42        0.56
) c* v5 _7 p3 F2 }) o, V( BG* Stiffness at 0.degree. C., MPa        17.2        29.7        11.6
6 y7 F3 A7 d2 _* b) W$ y5 wHeat Generation (.degree.C.)        33.8        52.5        31.3

* y6 I' K3 P/ E# r$ [% R2 \/ \. KTire Properties        X        Y (Control)
/ l2 [  g# s" g) P9 }Rolling Resistance        112        100
Wet Handling        106        100
+ Z0 c" z7 }$ }# @8 f7 b8 D2 kWet Skid        106        100
4 |" X$ h# O; V4 E+ _; `5 MWear        94        100
1 B5 |% \* u8 N, }Dry Handling        100        100
1 a9 \4 m3 P. O& A3 \% i0 C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)
8 j' j* r; V+ |1 P5 _( IUS patent #4,487,892 (Bridgestone, 1984)
4 k* u& }; Y( a+ f* E0 \% a/ P4 [High driving performances (i.e. improved controllability & stability during high speed running).
Satisfy two contradicting properties, controllability (improved hardness) and stability/grip/cornering (increased hysteretic loss).
US patent #5,446,097 (Mitsui, 1995)
Vulcanized rubber composed of (a) conjugated diene rubber, (b) ethylene alpha-olefin copolymer and (c) styrene oligomer.
1 q1 n# A) F- u3 f! SProvide excellent weather resistance, heat aging characteristics and mechanical strength
US patent #5,877,249 (Goodyear, 1999)
; y8 d; I* b2 W$ f1 TPneumatic tire composed of diene base elastomers, carbon black, silica & AMS resin.
: b& t/ F% V+ T. oCombination 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
/ T6 d+ j5 _, s& w( mUS 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.
. ?+ M6 E: y9 `, w, ~AMS resins, e.g. Kristallex® F-85 & Endex® 155.
" h2 N6 g; L# b7 d. _US patent #6,525,133 (Goodyear, 2003)
% Z4 S2 }) G9 x& xPneumatic 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。