Functionalized resin having a polar linker
Polar silane linkers are provided that attach to resins to form silane-functionalized resins. The functionalized resins can be bound to hydroxyl groups on the surface of silica particles to improve the dispersibility of the silica particles in rubber mixtures. Further disclosed are synthetic routes to provide the silane-functionalized resins, as well as various uses and end products that benefit from the unexpected properties of the silane-functionalized resins. Silane-functionalized resins impart remarkable properties on various rubber compositions, such as tires, belts, hoses, brakes, and the like. Automobile tires incorporating the silane-functionalized resins are shown to possess excellent results in balancing the properties of rolling resistance, tire wear, and wet braking performance.
1. A process to produce a silane functionalized resin having Formula (I),
resin-[Z k —X n —R 1 —(CH 2 ) m —Si(R 2 ) p ] q (I)
which comprises:
contacting a phenol modified resin having Formula (II)
resin-Z k —OH (II)
with a silane coupling agent having Formula (VI)
W—(CH 2 ) m —Si(R 2 ) p (VI),
in the presence of a catalyst selected from one or more of quaternary ammonium salts, quaternary phosphonium salts, iodide salts, triphenylphosphine, 4-dimethylaminopyridine, alkaline, Lewis acids, and Bronsted acids,
wherein Z is an aromatic group or an aliphatic group, optionally comprising a heteroatom;
wherein X is a linker comprising a heteroatom selected from sulfur, oxygen, nitrogen, a carbonyl group, or a combination thereof;
wherein W is independently selected from the group consisting of: amine, diamine, thiol, isocyanate, epoxide, alkene, and halogen;
wherein R 1 comprises one or more of an aliphatic and/or aromatic C 1 to C 18 and/or a linkage group comprising a heteroatom;
wherein each R 2 is the same or different and is independently selected from a C 1 to C 18 alkoxy, aryloxy, alkyl, aryl, or H, or OH, and is optionally branched, and wherein at least one R 2 is C 1 to C 18 alkoxy, aryloxy, or H, or OH;
wherein q is an integer from of at least 1;
wherein k is an integer of 0 or 1;
wherein n is an integer from 1 to 10;
wherein m is an integer from 0 to 10; and,
wherein p is 3.
2. The process according to claim 1 , wherein:
the reaction is performed in no solvent or in an inert solvent, and
the solvent is at least one selected from the group consisting of: a cyclic ether solvent, an acyclic ether solvent, a ketone solvent, aromatic hydrocarbons, aliphatic saturated hydrocarbons, aliphatic unsaturated hydrocarbons, alicyclic saturated hydro-carbons, alicyclic unsaturated hydrocarbons, halogenated hydrocarbons, and polar aprotic solvents.
3. The process according to claim 1 , wherein the contacting is performed at a temperature in a range of about 0° C. to about 300° C.
4. The process according to claim 1 , wherein the contacting is performed at a temperature in a range of about 100° C. to about 250° C.
5. The process according to claim 1 , wherein the contacting is performed at a temperature in a range of about 150° C. to about 250° C.