Silane Coupling Agents - Struktol

1 Silane Coupling Agents Struktol Silane Coupling Agents are used in rubber compounding. They provide Coupling of non-black pigments to the polymer backbone allowing for: Improved abrasion resistance, Higher compound modulus, Lower hystersis, Improved compression set, Improved rolling resistance in tire tread compounds. Product Product name: Chemical composition: Features: Typical data: form: Struktol SCA 98 Bis (3-triethoxysilylpropyl) Improves reinforcing Sulfur content: 21-23% Yellow liquid tetrasulfide capabilities of fillers with silanol groups Specific gravity: Improves abrasion resistance Provides higher compound modulus Improves rolling resistance in tread compounds Struktol SCA 98CB Same as SCA 98 Same as SCA 98 Sulfur content: 10-12% Black powder Specific gravity: Struktol SCA 98PL Same as SCA 98 Same as SCA 98 Sulfur content: 10-12% Pale yellow pastille Specific gravity: Struktol SCA 98WT Same as SCA 98 Same as SCA 98 Sulfur content: Off white powder Specific gravity: Struktol SCA 984 3-Thiocyanatopropyltriethoxy Improves compound Sulfur content: 12% Amber Silane modulus colored Improves compression set liquid Improves abrasion Specific gravity: resistance Struktol SCA 985 Bis (3-triethoxysilylpropyl) Improves reinforcing Sulfur content.

2 12-14% Yellow liquid disulfide capabilities of fillers with silanol groups Specific gravity: Improves abrasion resistance Provides higher compound modulus Improves rolling resistance in tread compounds Silane Coupling Agents 60a Silane Coupling Agents Product Product name: Chemical composition: Features: Typical data: form: Struktol SCA 985PL Bis (3-triethoxysilylpropyl) Same as SCA 985 Sulfur content: 6-7% Pale orange disulfide pastille Specific gravity: Struktol SCA 989 3-Mercaptopropyltriethoxy Improves tensile strength MPTES content 95% Clear liquid Silane Improves tear strength Improves abrasion Specific gravity: resistance Struktol SCA 989 WT 3-Mercaptopropyltriethoxy Same as SCA 989 SCA 989 content: 70% Light gray Silane powder Specific gravity: Struktol SCA 960 -Glycidyloxypropyl Mainly used in glass SCA 960 content: > Clear liquid trimethoxy Silane reinforced epoxy resin, ABS, nylon and PBT. Improves tensile strength Density: + Improves tear strength Improves relative extensibility Struktol SCA 972 Vinyl tri(2-methoxyethoxy) Improves the reinforcing SCA 972 content: > Clear liquid Silane capability of fillers with silanol groups in peroxide Density: + cured compounds Improves tensile strength Improves tear strength Improves abrasion resistance Struktol SCA 974 -Methacryloxypropyl Improves Coupling of fillers SCA 974 content: > Clear liquid trimethoxy Silane with silanol groups, and fiberglass in the resin/ Density: + polymer matrix Struktol SCA 974WT Same as SCA 974 Same as SCA 974 SCA 974 content: + Clear liquid Density: + Struktol SCA 1100 Aminopropyl triethoxy Silane Improves the reinforcing Min.

3 Purity: Colorless properties of fillers liquid containing hydroxyl groups Specific gravity: + (07/07/04)AAC/rca 60b Silane Coupling Agents Struktol SCA 98 & SCA 985. An Overview Struktol SCA 98 and SCA 985 are Silane Coupling Agents for use in rubber compounding. When used in rubber compounding, they provide Coupling of non-black pigments to the polymer backbone allowing for: Improved abrasion resistance Higher compound modulus Lower hysteresis Improved compression set Improved rolling resistance in tire tread compounds The theory for their effectiveness is that the Silane portion of the molecule couples with OH. groups on the silica and silicate surfaces in non-black pigments. The sulfur portion of the mole- cule is available for curing activity and can enter into the vulcanization mechanism. The SCA 98. is a tetra-sulfide Silane while the SCA 985 is a di-sulfide Silane . When the SCA 985 is used as a 1:1 replacement for the SCA 98, a reduction in the cured modulus and maximum tensile may be noticed.

4 This can usually be regained by increasing the sulfur level in the final mix pass. THE REINFORCEMENT OF NON-BLACK FILLERS IS. ENHANCED BY Struktol SCA 98 & SCA 985. Suggested Dosage phr Levels per 100 phr filler Silica, ppt 3 13. Clay Calcium Stearate 6 7. Magnesium Silicate (talc) 1 4. Fumed Silica 3 - 15. Silane Coupling Agents 60c MIXING AND DUMP TEMPERATURE. Part or all of the non-black filler should be dispersed with the Struktol SCA 98/SCA 985. in the first mixing stage. The remaining ingredients should be added after the Silane Coupling agent and the filler have been incorporated. Curatives should be added in the last mixing stage. SUGGESTED TYPICAL MIX SCHEDULE. 0' Rubber ' to all non-black pigment Struktol SCA 98/SCA 985. 2 ' Black, if present, oil, stearic acid, zinc oxide 3 ' AO2 , AO3. 4 ' Clean 5' Dump Because of the sulfur present in the Struktol SCA 98/SCA 985, it is necessary to control the maximum mixing temperature. The following are recommended dump temperatures: Natural Rubber 150 C.

5 SBR 150-160 C. NBR 140 C. 60d Silane Coupling Agents POLYMERS AND Struktol SCA 98/SCA 985 EFFECTIVENESS. ACM NDA. IIR GOOD. CM GOOD. XNBR GOOD. EPDM EXCELLENT. ECO EXCELLENT. FKM NDA. HIIR HALOBUTYL GOOD. CSM EXCELLENT. NATURAL RUBBER EXCELLENT. CR EXCELLENT. NBR EXCELLENT. BR EXCELLENT. IR EXCELLENT. SBR EXCELLENT. URETHANTE GOOD. VAMAC GOOD. Excellent - Struktol SCA 98/SCA 985 favorably influences properties, producing significant improvements in physical properties and state of cure. Good - Struktol SCA 98/SCA 985 has an effect on physical properties producing enhanced modulus and improved abrasion. NDA - No data available in actual experience with Struktol SCA 98/SCA 985. Silane Coupling Agents 60e AREAS OF RUBBER INDUSTRY WHERE. Struktol SCA 98/SCA 985 WOULD BE BENEFICIAL. Footwear - abrasion resistance - cutting and chunking resistance - flex life improvement Rolls - abrasion resistance - aging resistance - processing - set reduction (better load bearing). - reduced water swell - lower hysteresis Mechanical Molded - increased modulus Goods - better heat aging - compression set reduction - dynamic property improvement - reduced swell to polar liquids - filler substitution (non-black for black).

6 Hose - improved abrasion on cover - better heat aging - increased modulus - lower compression set - improved adhesion to reinforcing elements Solid Tires - improved abrasion - lower hysteresis - higher modulus - improved processing 60f Silane Coupling Agents Tires - treads for abrasion, hot tear, improved rolling resistance, - lower hystersis - carcass for adhesion and/or filler substitution - breaker (belt) stocks for adhesion Belts - Flat Belts - increased abrasion - improved reversion resistance - reduced cost with clay substitution for black - improved cord adhesion - increased flex life and modulus Belts - V Belts - increased modulus - improved abrasion - longer flex life - improved adhesion to reinforcing elements Silane Coupling Agents 60g Struktol Silane Coupling Agents Struktol Silane Coupling Agents are for use in rubber compounds, particularly mineral-filled, and allow for: Lower compound viscosity Higher compound modulus Improved abrasion resistance Lower hysteresis Improved compression set Improved rolling resistance in tire tread compounds Improved dispersibility Faster incorporation Contact Struktol Company of America now for our Silane Coupling Agents brochure with CD.

7 Phone: 800-327-8649 or 330-928-5188. E-mail: 60h Silane Coupling Agents