# US 8,784,711 B2 · Process for preparing a reinforced and reactive thermoplastic composition, and this composition

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- Number: US 8,784,711 B2
- Document ID: US8784711B2
- Status: Granted
- Kind: B2
- Application number: 13/196,500
- Filed: 2011-08-02
- Published: 2012-02-09
- Granted: 2014-07-22
- Earliest claimed: 2010-08-04
- Assignees: Hutchinson
- Applicants: Nicolas Garois; Philippe Sonntag; Grégory Martin; Matthieu Vatan; Jacques Drouvroy
- Inventors: Nicolas Garois; Philippe Sonntag; Grégory Martin; Matthieu Vatan; Jacques Drouvroy
- Web page: https://patentgrep.com/patent/US8784711B2

## CPC

- C08J 3/24: Crosslinking, e.g. vulcanising, of macromolecules (mechanical aspects B29C35/00; crosslinking agents C08K)
- B29C 48/40: using two or more parallel screws {or at least two parallel non-intermeshing screws}, e.g. twin screw extruders
- B29C 48/405: Intermeshing co-rotating screws
- C08G 69/40: Polyamides containing oxygen in the form of ether groups (C08G69/12, C08G69/32 take precedence)
- C08L 23/06: Polyethylene
- C08L 23/12: Polypropene
- C08L 23/16: Ethylene-propylene or ethylene-propylene-diene copolymers
- C08L 51/06: grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
- C08L 67/00: Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain (of polyester-amides C08L77/12; of polyester-imides C08L79/08); Compositions of derivatives of such polymers
- C08L 75/04: Polyurethanes
- C08L 77/00: Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain (of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08); Compositions of derivatives of such polymers
- C08L 77/02: Polyamides derived from omega-amino carboxylic acids or from lactams thereof (C08L77/10 takes precedence)
- C08L 79/08: Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08L 81/06: Polysulfones; Polyethersulfones
- C08L 97/02: Lignocellulosic material, e.g. wood, straw or bagasse {(manufacture of articles made from lignocellulosic material by dry processes B27N)}
- B29C 48/365: using pumps, e.g. piston pumps
- C08G 77/12: containing silicon bound to hydrogen
- C08J 2323/06: Polyethene
- C08J 2367/00: Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J 2375/04: Polyurethanes
- C08J 2377/02: Polyamides derived from omega-amino carboxylic acids or from lactams thereof (C08J2377/10 takes precedence)
- C08J 2377/06: Polyamides derived from polyamines and polycarboxylic acids (C08J2377/10 takes precedence)
- C08J 2451/06: grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
- C08J 2463/00: Characterised by the use of epoxy resins; Derivatives of epoxy resins
- C08J 2483/04: Polysiloxanes
- C08K 5/0025: {Crosslinking or vulcanising agents; including accelerators}
- C08L 63/00: Compositions of epoxy resins; Compositions of derivatives of epoxy resins
- C08L 83/04: Polysiloxanes
- C08L 2205/03: containing three or more polymers in a blend
- C08L 2205/16: Fibres; Fibrils
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

The invention relates to a process for preparing a reinforced and reactive thermoplastic composition having a continuous phase which is based on at least one thermoplastic polymer and dispersed in which is a discontinuous phase based on at least one reactive reinforcing agent that may be immiscible with said at least one thermoplastic polymer, and also to a composition obtained by this process. A process according to the invention for preparing this thermoplastic composition in which said at least one reinforcing agent is selected from the group consisting of epoxy resins, polyorganosiloxanes having SiH functional group(s), diisocyanates or polyisocyanates and mixtures thereof, comprises a grafting, a branching and/or a crosslinking, that are carried out in situ, by reactive compounding of these phases with a shear rate greater than 102 s−1, of said at least one reinforcing agent onto the chain of said at least one thermoplastic polymer, so that said discontinuous phase is dispersed homogeneously in said continuous phase in the form of nodules having a number-average size of less than 5 μm.

## Claims

### Claim 1

A process for preparing a reactive thermoplastic composition comprising a continuous phase based on at least one thermoplastic polymer and dispersed therein a discontinuous phase based on at least one reactive reinforcing chemical agent that may be immiscible with said at least one thermoplastic polymer and that is selected from the group consisting of epoxy resins, polyorganosiloxanes having SiH functional group(s), diisocyanates or polyisocyanates and mixtures thereof, wherein this process comprises a grafting, a branching and/or a crosslinking, that are carried out in situ, by a reactive compounding of these phases with a shear rate greater than 103 s−1, of said at least one reinforcing agent onto the chain of said at least one thermoplastic polymer, so that said discontinuous phase is dispersed in said continuous phase in the form of nodules having a number-average size of less than 5 μm with a maximum standard deviation of 0.5 μm.

### Claim 2 (depends on 1)

The process as claimed in claim 1, wherein this reactive compounding is carried out under a non-inert atmosphere and at a temperature at least 30° C. above the melting point of said thermoplastic polymer or that of said thermoplastic polymers which is the highest.

### Claim 3 (depends on 1)

The process as claimed in claim 1, wherein, during this reactive compounding, there is no compatibilizing agent between said phases.

### Claim 4 (depends on 1)

The process as claimed in claim 1, wherein said reactive compounding is carried out in a co-rotating twin-screw extruder, in at least one pass and with a residence time of said phases of between 1 min and 2 min, and wherein said at least one reinforcing agent is introduced into the extruder using a pump, following the introduction of said at least one thermoplastic polymer.

### Claim 5 (depends on 1)

The process as claimed in claim 1, wherein a crosslinked or non-crosslinked epoxy resin is used for said at least one reactive reinforcing chemical agent in an amount between 0.5 and 60 parts by weight per 100 parts of thermoplastic polymer(s), this epoxy resin being selected from the group consisting of bisphenol A epoxy resins, bisphenol F epoxy resins, glycol epoxy resins, brominated epoxy resins, novolac epoxy resins, phenolic epoxy resins, epoxy resins based on vinyl and/or glycidyl ether, monomers, oligomers and block polymers of these resins and mixtures thereof.

### Claim 6 (depends on 5)

The process as claimed in claim 5, wherein no crosslinking system for said epoxy resin is used, which epoxy resin reacts in situ radically with said at least one thermoplastic polymer like a terminating agent.