Polyorganosiloxane composition for use in unsaturated elastomer, article made therefrom, and associated method

A method for producing a tire composition, comprising:

• producing a sulfur-functional linear polyorganosiloxane comprising a chemically-protected sulfur group by reacting a linear polyorganosiloxane comprising an alkene group and a —R28 group bonded to the linear polyorganosiloxane through a divalent aliphatic radical, a divalent cycloaliphatic radical, or a divalent aromatic radical, d a —R, and a thio acid and having a structure as defined in formula (IV):
• ((R27OC(═O))t-(L)j)k-(Q)zJ(=E)SH (IV)
• wherein R27 is an aliphatic radical, a cycloaliphatic radical, or an aromatic radical;
• L is independently at each occurrence a monovalent group or a polyvalent group that is derived by substitution of a C1-C20 aliphatic radical, a C3-C40 cycloaliphatic radical, or a C3-C40 aromatic radical;
• Q is oxygen, sulfur or an NR29 group, R29 is an aliphatic radical, a cycloaliphatic radical, or an aromatic radical;
• J is carbon, sulfur, phosphorus, or a sulfinyl group;
• E is oxygen or sulfur;
• S comprises one or more sulfur atoms;
• R28 is a hydroxyl group, an alkoxy group, or an aryloxy group;
• “t” is an integer that is equal to 0, 1, 2, 3, 4, or 5;
• “j” is equal to 0 or 1, “k” is equal to 1 if J is carbon, sulfur or sulfinyl, “k” is 2 if J is phosphorus;
• and “z” is equal to 0, 1, or 2;
• and
• mixing the sulfur-functional linear polyorganosiloxane with an unsaturated elastomer;
• wherein the sulfur-functional linear polyorganosiloxane comprises one or more of a thiocarbamate, dithiocarbamate, or a derivative or analog of thiocarbamate or dithiocarbamate.

A tire formed from a composition comprising the reaction product of a linear polyorganosiloxane comprising an alkene group and a —R28 group bonded to the linear polyorganosiloxane through a divalent aliphatic radical, a divalent cycloaliphatic radical, or a divalent aromatic radical, and a thio acid having a structure defined by formula (IV):

• ((R27OC(═O))t-(L)j)k-(Q)zJ(=E)SH (IV)
• wherein R27 is an aliphatic radical, a cycloaliphatic radical, or an aromatic radical;
• L is independently at each occurrence a monovalent group or a polyvalent group that is derived by substitution of a C1-C20 aliphatic radical, a C3-C40 cycloaliphatic radical, or a C3-C40 aromatic radical;
• Q is oxygen, sulfur or an NR29 group, R29 is an aliphatic radical, a cycloaliphatic radical, or an aromatic radical;
• J is carbon, sulfur, phosphorus, or a sulfonyl sulfinyl group;
• E is oxygen or sulfur;
• S comprises one or more sulfur atoms;
• R28 is a hydroxyl group, an alkoxy group, or an aryloxy group;
• “t” is an integer that is equal to 0, 1, 2, 3, 4, or 5;
• “j” is equal to 0 or 1, “k” is equal to 1;
• and “z” is equal to 0, 1, or 2;
• wherein the reaction product comprises one or more of a thiocarbamate, dithiocarbamate, or a derivative or analog of thiocarbamate or dithiocarbamate.