# US 11,298,920 B2 · Silicone rubber and fiber-resin composite-based laminated product

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- Number: US 11,298,920 B2
- Document ID: US11298920B2
- Status: Granted
- Kind: B2
- Application number: 16/337,191
- Filed: 2017-09-25
- Published: 2019-07-25
- Granted: 2022-04-12
- Earliest claimed: 2016-09-27
- Assignees: Compagnie Generale Des Etablissements Michelin
- Applicants: Compagnie Generale Des Etablissements Michelin
- Inventors: Antonio Delfino; Philippe Berguerand; François Pozo; Pascal Schroeter
- Web page: https://patentgrep.com/patent/US11298920B2

## CPC

- B32B 25/08: of synthetic resin
- B32B 5/02: characterised by structural features of a {fibrous or filamentary} layer {(layer formed of metallic wires B32B15/02; layer formed of natural mineral fibres B32B19/02; layer formed of wood fibres B32B21/02)}
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 17/04: bonded with or embedded in a plastic substance
- B32B 25/02: with fibres or particles {being present as additives in the layer}
- B32B 25/10: next to a fibrous or filamentary layer
- B32B 25/20: comprising silicone rubber
- B32B 27/12: next to a fibrous or filamentary layer
- B32B 27/28: comprising synthetic resins not wholly covered by any one of the sub-groups {B32B27/30 - B32B27/42}
- B32B 27/283: {comprising polysiloxanes}
- B32B 27/36: comprising polyesters
- B32B 27/38: comprising epoxy resins
- B32B 27/42: comprising condensation resins of aldehydes, e.g. with phenols, ureas or melamines
- B60B 9/00: Wheels of high resiliency {, e.g. with conical interacting pressure-surfaces (resilient wheels comprising rail-engaging elements B60B17/0027)}
- B60C 7/00: Non-inflatable or solid tyres (B60C1/00 takes precedence)
- B32B 2250/03: 3 layers
- B32B 2250/40: Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
- B32B 2260/021: Fibrous or filamentary layer
- B32B 2260/023: Two or more layers
- B32B 2260/046: Synthetic resin
- B32B 2262/10: Inorganic fibres
- B32B 2262/101: Glass fibres
- B32B 2307/30: having particular thermal properties
- B32B 2307/50: having particular mechanical properties
- B32B 2307/54: Yield strength; Tensile strength
- B32B 2307/732: Dimensional properties
- B32B 2605/00: Vehicles
- B60B 9/26: comprising resilient spokes
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B60B: VEHICLE WHEELS (making wheels or wheel parts by rolling B21H1/00, by forging, hammering or pressing B21K1/28); CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES

## Abstract

A laminated product (10) comprises at least: a layer (1) of silicone rubber, in particular of the high temperature crosslinking type, such as, for example, a silicone rubber of VMQ or PVMQ grade the said layer (1) of silicone rubber being sandwiched between two layers (2) of fibre-resin composite comprising filaments (3) of an inorganic substance (4), in particular glass, embedded in a thermoset resin (5), such as, for example, a vinyl ester resin. The silicone layer has a thickness, denoted T1, of between 1.5 and 3 times the thickness T2 of each layer of fibre-resin composite, which is between 0.25 and 2 mm. Such a laminate may be used in the manufacture of a finished article, in particular of a non-pneumatic wheel or tire.

## Claims

### Claim 1

A laminate comprising at least one silicone rubber layer sandwiched between two fiber-resin composite layers comprising glass filaments embedded in a thermoset resin, wherein the silicone rubber layer has a thickness T1 of between 1.5 and 3 times the thickness T2 of each fiber-resin composite layer, with T2 being between 0.25 and 2 mm, and wherein the silicone rubber layer and the fiber-resin composite layers are joined together by at least one adhesion primer.

### Claim 2 (depends on 1)

The laminate according to claim 1, wherein T1 is between 1 and 3 mm.

### Claim 3 (depends on 2)

The laminate according to claim 2, wherein T1 is between 1.5 and 2.5 mm.

### Claim 4 (depends on 1)

The laminate according to claim 1, wherein T2 is between 0.5 and 1.5 mm.

### Claim 5 (depends on 1)

The laminate according to claim 1 comprising at least two silicone rubber layers and three fiber-resin composite layers.

### Claim 6 (depends on 1)

The laminate according to claim 1, wherein the adhesion primer is based on an organosilane or organopolysiloxane.

### Claim 7 (depends on 1)

The laminate according to claim 1, wherein the silicone rubber exhibits an apparent secant tensile modulus, at 10% elongation, measured at 20° C., which is less than 5 MPa.

### Claim 8 (depends on 7)

The laminate according to claim 7, wherein the silicone rubber exhibits an apparent secant tensile modulus, at 10% elongation, measured at 20° C., which is between 1 and 5 MPa.

### Claim 9 (depends on 8)

The laminate according to claim 8, wherein the silicone rubber exhibits an apparent secant tensile modulus, at 10% elongation, measured at 20° C., which is between 1 and 3 MPa.

### Claim 10 (depends on 1)

The laminate according to claim 1, wherein the silicone rubber exhibits a tensile elongation at break, measured at 20° C., which is greater than 350%.

### Claim 11 (depends on 10)

The laminate according to claim 10, wherein the silicone rubber exhibits a tensile elongation at break, measured at 20° C., which is greater than 400%.

### Claim 12 (depends on 11)

The laminate according to claim 11, wherein the silicone rubber exhibits a tensile elongation at break, measured at 20° C., which is greater than 450%.

### Claim 13 (depends on 1)

The laminate according to claim 1, wherein the silicone rubber is of the high temperature crosslinking type.

### Claim 14 (depends on 1)

The laminate according to claim 1, wherein the silicone rubber is of a grade selected from the group consisting of MQ, FMQ, PMQ, VMQ, PVMQ and FVMQ.

### Claim 15 (depends on 14)

The laminate according to claim 14, wherein the silicone rubber is of VMQ or PVMQ grade.

### Claim 16 (depends on 15)

The laminate according to claim 15, wherein the silicone rubber is of PVMQ grade.

### Claim 17 (depends on 1)

The laminate according to claim 1, wherein the silicone rubber exhibits a glass transition temperature Tgi which is less than −100° C.

### Claim 18 (depends on 17)

The laminate according to claim 17, wherein the silicone rubber exhibits a glass transition temperature Tgi which is less than −110° C.

### Claim 19 (depends on 17)

The laminate according to claim 17, wherein the silicone rubber exhibits an apparent secant tensile modulus, at 10% elongation ASM10, measured at −100° C., which is less than 30 MPa.

### Claim 20 (depends on 19)

The laminate according to claim 19, wherein the silicone rubber exhibits an apparent secant tensile modulus, at 10% elongation ASM10, measured at −100° C., which is less than 20 MPa.

### Claim 21 (depends on 17)

The laminate according to claim 17, wherein the silicone rubber exhibits an elongation at break Et, measured at −100° C., which is greater than 100%.

### Claim 22 (depends on 21)

The laminate according to claim 21, wherein the silicone rubber exhibits an elongation at break Et, measured at −100° C., which is greater than 150%.

### Claim 23 (depends on 1)

The laminate according to claim 1, wherein the silicone rubber is a composition based on silicone rubber and on at least one additive.

### Claim 24 (depends on 23)

The laminate according to claim 23, wherein the additive is a crosslinking agent.

### Claim 25 (depends on 24)

The laminate according to claim 24, wherein the additive is an organic peroxide type crosslinking agent.

### Claim 26 (depends on 23)

The laminate according to claim 23, wherein the additive is a filler.

### Claim 27 (depends on 26)

The laminate according to claim 26, wherein the additive is a silica type filler.

### Claim 28 (depends on 1)

The laminate according to claim 1, wherein the glass transition temperature Tg2 of the thermoset resin is greater than 30° C.

### Claim 29 (depends on 28)

The laminate according to claim 28, wherein the glass transition temperature Tg2 of the thermoset resin is greater than 70° C.

### Claim 30 (depends on 1)

A finished article comprising the laminate according to claim 1.

### Claim 31 (depends on 1)

A non-pneumatic wheel or tire comprising the laminate according to claim 1.

### Claim 32 (depends on 1)

The laminate according to claim 1, wherein the silicone rubber layer comprises 100 phr of silicone elastomer.