# US 2017/0283591 A1 · Treated Fillers, Compositions Containing Same, and Articles Prepared Therefrom

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- Number: US 2017/0283591 A1
- Document ID: US20170283591A1
- Status: Published application
- Kind: A1
- Application number: 15/631,156
- Filed: 2017-06-23
- Published: 2017-10-05
- Earliest claimed: 2013-10-07
- Assignees: PPG Industries Ohio, Inc.
- Applicants: PPG Industries Ohio, Inc.
- Inventors: Timothy A. Okel; Peter L. Votruba-Drzal; Justin J. Martin; Raphael O. Kollah; Truman Wilt; Brian K. Rearick; Clint Steven Edelman; Feng Wang; Linda K. Anderson; Kurt G. Olson
- Web page: https://patentgrep.com/patent/US20170283591A1

## CPC

- C08F 8/42: Introducing metal atoms or metal-containing groups
- C08K 3/36: Silica
- C08K 5/09: Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K 9/04: Ingredients treated with organic substances {(treated with macromolecular compounds C08K9/08)}
- C08K 9/06: with silicon-containing compounds
- C08K 9/08: Ingredients agglomerated by treatment with a binding agent
- C08K 9/10: Encapsulated ingredients
- C08L 7/02: Latex
- C08L 9/08: Latex
- C08L 33/02: Homopolymers or copolymers of acids; Metal or ammonium salts thereof
- C09C 1/3063: {Treatment with low-molecular organic compounds}
- C09C 1/3072: {Treatment with macro-molecular organic compounds}
- C09C 1/3081: {Treatment with organo-silicon compounds}
- C09C 1/309: {Combinations of treatments provided for in groups C09C1/3009 - C09C1/3081}
- C09C 3/006: {Combinations of treatments provided for in groups C09C3/04 - C09C3/12}
- C09C 3/08: Treatment with low-molecular-weight {non-polymer} organic compounds {(C09C3/006, C09C3/048 take precedence)}
- C09C 3/10: Treatment with macromolecular organic compounds {(C09C3/006 takes precedence)}
- C09C 3/12: Treatment with organosilicon compounds {(C09C3/006 takes precedence)}
- C01P 2006/12: Surface area
- C01P 2006/22: Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability
- C01P 2006/80: Compositional purity
- C04B 14/066: {Precipitated or pyrogenic silica}
- C08L 2666/58: SiO2 or silicates
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C09C: TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES (treatment of materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone C04B14/00, C04B18/00, C04B20/00); PREPARATION OF CARBON BLACK {; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS}
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE

## Abstract

The present invention includes a process for producing treated filler that includes (a) treating a slurry that includes untreated filler, where the untreated filler has not been previously dried, with a treating composition that includes a treating agent, thereby forming a treated filler slurry, and (b) drying the treated filler slurry to produce treated filler. The treating agent can include a polymer having (i) at least one first group that interacts with the untreated filler and (ii) at least one second group that interacts with a rubber matrix into which the treated filler is incorporated. The present invention also is directed to treated filler prepared by the process, as well as rubber compounding compositions and tires including the treated filler.

## Claims

### Claim 1

A rubber composition comprising a treated filler, produced by:
(a) treating a slurry comprising untreated filler, wherein said untreated filler has not been previously dried, with a treating composition comprising a treating agent, thereby forming a treated filler slurry; and
(b) drying said treated filler slurry to produce treated filler,
wherein said treating agent comprises a polymer comprising (i) at least one first group that interacts with said untreated filler and (ii) at least one second group that interacts with a rubber matrix into which said treated filler is incorporated.

### Claim 2 (depends on 1)

The rubber composition of claim 1, wherein the treating composition further comprises a coupling agent comprising an organosilane selected from the group consisting of (4-chloromethyl-phenyl) trimethoxysilane, (4-chloromethyl-phenyl) triethoxysilane, [2-(4-chloromethyl-phenyl)-ethyl] trimethoxysilane, [2-(4-chloromethyl-phenyl)-ethyl]triethoxysilane, (3-chloro-propenyl)-trimethoxysilane, (3-chloro-propenyl)-triethoxysilane, (3-chloro-propyl)-triethoxysilane, (3-chloro-propyl)-trimethoxysilane, trimethoxy-(2-p-tolyl-ethyl)silane, triethoxy-(2-p-tolyl-ethyl)silane, and combinations thereof.

### Claim 3 (depends on 1)

The rubber composition of claim 1, wherein the rubber composition comprises natural rubber.

### Claim 4 (depends on 1)

The rubber composition of claim 1, wherein the rubber composition is a rubber compounding master batch.

### Claim 5 (depends on 1)

The rubber composition of claim 1, wherein said untreated filler is chosen from aluminum silicate, silica gel, colloidal silica, precipitated silica, and mixtures thereof.

### Claim 6 (depends on 1)

The rubber composition of claim 1, wherein the filler comprises precipitated silica.

### Claim 7 (depends on 1)

The rubber composition of claim 1, wherein the polymer is selected from an acrylic polymer, a styrene butadiene latex, a natural rubber latex, or combinations thereof.

### Claim 8 (depends on 7)

The rubber composition of claim 7, wherein the acrylic polymer is selected from an acrylic random copolymer, an acrylic comb polymer, an acrylic block copolymer, a hyperbranched acrylic polymer, or combinations thereof.

### Claim 9 (depends on 8)

The rubber composition of claim 8, wherein the hyperbranched acrylic polymer at least partially encapsulates the treated filler.

### Claim 10 (depends on 1)

The rubber composition of claim 1, wherein the at least one first group is selected from an ester, carboxylic acid, imide, anhydride, diacid, lactone, oxirane, isocyanate, alkoxysilane, hydrolysis products thereof, salts thereof, or combinations thereof.

### Claim 11 (depends on 1)

The rubber composition of claim 1, wherein the at least one second group is selected from formyl, keto, thiol, sulfido, halo, amino, alkenyl, alkynyl, alkyl, hydrolysis products thereof, salts thereof, or combinations thereof.

### Claim 12 (depends on 1)

The rubber composition of claim 1, wherein the at least one second group is selected from hydroxyl, anhydride, oxirane, hydrolysis products thereof, salts thereof, or combinations thereof.

### Claim 13 (depends on 1)

The rubber composition of claim 1, wherein the treating composition further comprises an organosilane coupling agent represented by formula (II):
(R1)a(R2)bSiX4-a-b (II),
wherein each R1 is independently a hydrocarbyl group comprising 1 to 36 carbon atoms and a functional group, wherein the functional group of the hydrocarbyl group is vinyl, allyl, hexenyl, epoxy, glycidoxy, (meth)acryloxy, sulfide, isocyanato, polysulfide, mercapto, or halogen; each R2 is independently a hydrocarbyl group having from 1 to 36 carbon atoms or hydrogen; X is independently halogen or alkoxy having 1 to 36 carbon atoms; a is 0, 1, 2, or 3; b is 0, 1, or 2; (a+b) is 1, 2, or 3; provided that when b is 1, (a+b) is 2 or 3.

### Claim 14 (depends on 13)

The rubber composition of claim 13, wherein the treating composition further comprises an organosilane different from the organosilane represented by formula (II).

### Claim 15 (depends on 1)

The rubber composition of claim 1, wherein the treating composition further comprises a non-coupling agent that is different from the treating agent and wherein the non-coupling agent that is different from the treating agent is one or more of a biopolymer, fatty acid, organic acid, polymer emulsion, polymer coating composition, and combinations thereof.

### Claim 16 (depends on 1)

The rubber composition of claim 1, wherein the treating composition further comprises a non-coupling agent selected from an anionic surfactant, a nonionic surfactant, an amphoteric surfactant, and combinations thereof, present in an amount of from greater than 1% to 25% by weight based on the weight of untreated filler.

### Claim 17 (depends on 1)

The rubber composition of claim 1, wherein the treated filler comprises treated precipitated silica; and
the treating composition further comprises:
(i) at least one coupling agent, and
(ii) a non-coupling agent chosen from anionic, nonionic and/or amphoteric surfactants, which is present in an amount of from greater than 1% to 25% by weight based on the weight of untreated filler.

### Claim 18

A rubber composition, rubber article, or tire tread comprising a treated precipitated silica, produced by:
(a) combining an alkali metal silicate and an acid to form an untreated slurry comprising untreated silica, wherein said untreated silica has not been previously dried;
(b) drying the untreated slurry to produce dried precipitated silica;
(c) forming an aqueous slurry of the dried precipitated silica with a treating composition comprising a treating agent, and, optionally, a coupling agent and/or, optionally, a non-coupling agent to form a treated precipitated silica slurry; and
(d) drying the treated precipitated silica slurry to produce a dried treated precipitated silica,
wherein said treating agent comprises a polymer comprising (i) at least one first group that interacts with said untreated silica and (ii) at least one second group that interacts with a rubber matrix into which said treated silica is incorporated.

### Claim 19 (depends on 18)

The treated precipitated silica of claim 18, wherein said coupling agent of said treating composition comprises an organosilane selected from the group consisting of (4-chloromethyl-phenyl) trimethoxysilane, (4-chloromethyl-phenyl) triethoxysilane, [2-(4-chloromethyl-phenyl)-ethyl] trimethoxysilane, [2-(4-chloromethyl-phenyl)-ethyl]triethoxysilane, (3-chloro-propenyl)-trimethoxysilane, (3-chloro-propenyl)-triethoxysilane, (3-chloro-propyl)-triethoxysilane, (3-chloro-propyl)-trimethoxysilane, trimethoxy-(2-p-tolyl-ethyl)silane, triethoxy-(2-p-tolyl-ethyl)silane, and combinations thereof.

### Claim 20 (depends on 18)

The treated precipitated silica of claim 18, wherein the polymer is selected from an acrylic polymer, a styrene butadiene latex, a natural rubber latex, or combinations thereof.

### Claim 21 (depends on 20)

The treated precipitated silica of claim 20, wherein the acrylic polymer is selected from an acrylic random copolymer, an acrylic comb polymer, an acrylic block copolymer, a hyperbranched acrylic polymer, or combinations thereof.

### Claim 22 (depends on 21)

The treated precipitated silica of claim 21, wherein the hyperbranched acrylic polymer at least partially encapsulates the treated filler.

### Claim 23 (depends on 18)

The treated precipitated silica of claim 18, wherein the at least one first group is selected from an ester, carboxylic acid, imide, anhydride, diacid, lactone, oxirane, isocyanate, alkoxysilane, hydrolysis products thereof, salts thereof, or combinations thereof.

### Claim 24 (depends on 18)

The treated precipitated silica of claim 18, wherein the at least one second group is selected from formyl, keto, thiol, sulfido, halo, amino, alkenyl, alkynyl, alkyl, hydrolysis products thereof, salts thereof, or combinations thereof.

### Claim 25 (depends on 18)

The treated precipitated silica of claim 18, wherein the at least one second group is selected from hydroxyl, anhydride, oxirane, hydrolysis products thereof, salts thereof, or combinations thereof.