Liquid (meth)acrylic composition, process for producing said composition and uses thereof

Abstract

(Meth)acrylic composition comprising a recycled material, process for producing said composition, and its uses. The present invention relates to a (meth)acrylic composition, a process for preparing the (meth)acrylic composition, and uses of such a (meth)acrylic composition. In particular, the present invention relates to a (meth)acrylic composition comprising an odor-masking agent, a process for preparing the (meth)acrylic composition, and uses of such a (meth)acrylic composition.The invention also relates to a polymeric (meth)acrylic composite material, comprising or made of a (meth)acrylic composition comprising said odor-masking agent, a method for preparing such a (meth)acrylic composite material comprising or made of a (meth)acrylic composition comprising an odor-masking agent, and an object comprising such a polymeric (meth)acrylic composite material comprising or made of a (meth)acrylic composition comprising an odor-masking agent.

Description

Title of the invention: Liquid (meth)acrylic composition, process for producing said composition and uses thereof technical field

[0001] The present invention relates to a (meth)acrylic composition, a process for preparing the (meth)acrylic composition and the uses of such a (meth)acrylic composition.

[0002] In particular, the present invention relates to a (meth)acrylic composition comprising an odor-masking agent, a method for preparing the (meth)acrylic composition and the uses of such a (meth)acrylic composition.

[0003] The invention also relates to a polymeric (meth)acrylic composite material, comprising or made of a (meth)acrylic composition comprising said odor-masking agent, a method for preparing such a (meth)acrylic composite material comprising or made of a (meth)acrylic composition comprising an odor-masking agent and an object comprising such a polymeric (meth)acrylic composite material comprising or made of a (meth)acrylic composition comprising an odor-masking agent. [Technical problem]

[0004] Many compositions include compounds and components which may have a strong, unpleasant, or even sometimes aggressive odor.

[0005] This relates to many polymerization compositions which include specific monomers having a specific characteristic odor, which is considered unpleasant.

[0006] For example, acrylic monomers, such as methyl acrylate and certain methacrylic monomers, have a specific odor, as does styrene. When a container containing these compounds is opened by a user, the characteristic odor may even be considered more unpleasant at first.

[0007] The odor may even persist after the composition has been polymerized, due to residual monomer or by-products generated during polymerization. Because of the low odor threshold of certain components of the residual monomer or by-products, they may even be smelled and detectable by scent at relatively low concentrations.

[0008] There is a need for polymerizable liquid (meth)acrylic compositions and polymeric (meth)acrylic compositions that have a reduced odor or a non-detectable odor of their specific included monomers.

[0009] There is a need for polymerizable liquid (meth)acrylic compositions and polymeric (meth)acrylic compositions having a pleasant odor.

[0010] There is a need for polymerizable liquid (meth)acrylic compositions and polymeric (meth)acrylic compositions whose odor is as pleasant as possible to the end user.

[0011] There is also a need to propose a process for preparing polymerizable liquid (meth)acrylic compositions and polymeric (meth)acrylic compositions that have a reduced odor or an undetectable odor of their specific included monomers.

[0012] There is also a need for a process for preparing (meth)acrylic composite materials that have a pleasant odor.

[0013] Another object of the present invention is to propose a method for manufacturing a polymeric (meth)acrylic composite material which has a reduced odor or an undetectable odor of the specific monomers included in said method. [CONTEXT OF THE INVENTION] Prior art

[0014] Document WO2013 / 056845 describes a composite material obtained by in-situ polymerization of thermoplastic (meth)acrylic resins. The polymeric composite material obtained by in-situ polymerization of a thermoplastic (meth)acrylic resin and a fibrous material containing long fibers, and its use, a method for manufacturing such a composite material, and a manufactured mechanical or structured part or article comprising this polymeric composite material are also described. The document does not disclose anything concerning the use of an odor-masking agent or the reduction of monomer odor.

[0015] Document WO2014 / 013028 describes an impregnation process for a fibrous substrate, a liquid (meth)acrylic syrup for the impregnation process, its polymerization method, and a resulting structured article. The liquid (meth)acrylic syrup comprises a (meth)acrylic polymer, a (meth)acrylic monomer, and at least one initiator or initiation system for starting the polymerization of the (meth)acrylic monomer. The document does not disclose anything regarding the use of an odor-masking agent or the reduction of monomer odor.

[0016] These syrups based on a (meth)acrylic composition all have a strong odor of (meth)acrylic monomers, particularly methyl methacrylate. None of the prior art cited discloses a liquid (meth)acrylic composition or a syrup comprising an odor-masking agent. [Brief description of the invention]

[0017] Surprisingly, it was found that a (meth)acrylic MCI composition comprising:

[0018] (a) 100 parts by weight of a liquid (meth)acrylic syrup (LSM1) comprising:

[0019] (ai) from 1% by weight to 50% by weight of one or more (meth) acrylic polymers (PI), and

[0020] (a2) from 50% by weight to 99% by weight of one or more monomers (meth)acrylics (Ml), each monomer (Ml) comprising only one (meth)acrylic function per monomer.

[0021] (b) at least one odor-masking agent,

[0022] (c) possibly from 0.01 parts by weight to 10 parts by weight of an initiator of polymerization,

[0023] makes it possible to provide a composition which has a reduced odor or a non-detectable odor of its specific included monomers, compared with a composition not comprising (b).

[0024] Surprisingly, a (meth)acrylic (MCI) composition comprising: was found to be:

[0025] (a) 100 parts by weight of a liquid (meth)acrylic syrup (LSM1) comprising:

[0026] (ai) from 1% by weight to 50% by weight of one or more (meth) acrylic polymers (PI), and

[0027] (a2) from 50% by weight to 99% by weight of one or more monomers (meth)acrylics (Ml), each monomer (Ml) comprising only one (meth)acrylic function per monomer.

[0028] (b) from 0.002 to 10 parts by weight of an odor-masking agent comprising at less one component selected from monoesters, diesters and / or triesters, alcohols, aldehydes, ketones and terpenes or a mixture of one or more of these components,

[0029] (c) possibly from 0.01 parts by weight to 10 parts by weight of an initiator of polymerization,

[0030] makes it possible to provide a composition which has a reduced odor or a non-detectable odor of its specific included monomers, compared with a composition not comprising (b).

[0031] Surprisingly, a process for preparing a (meth)acrylic (MCI) composition was also found, said process comprising the following steps:

[0032] (i) supply of 100 parts by weight of (a) a liquid (meth)acrylic syrup (LSM1) including:

[0033] (aO of 1% by weight to 50% by weight of one or more (meth) acrylic polymers (PI), and

[0034] (a2) from 50% by weight to 99% by weight of one or more monomers (meth)acrylics (Ml), each monomer (Ml) comprising only one (meth)acrylic function per monomer.

[0035] (ii) supplying (b) 0.002 to 10 parts by weight of an odor-masking agent comprising at least one component selected from monoesters, diesters and / or triesters, alcohols, aldehydes, ketones and terpenes or a mixture of one or more of these components,

[0036] (iii) supplying 0.01 parts by weight to 10 parts by weight of a polymerization initiator,

[0037] (iv) mixture of components,

[0038] enables the preparation and supply of a composition, which has a reduced odor or a non-detectable odor of its specific included monomers, for the preparation of (meth)acrylic polymeric compositions (MPC1) and (meth)acrylic polymeric composite materials (MPCM1) which also have, once polymerized, a reduced odor or a non-detectable odor of their specific included residual monomers, compared to a composition not comprising (b).

[0039] Surprisingly, it was found that a (meth)acrylic polymeric material (MPC1) or a (meth)acrylic polymeric composite material (MPCM1) prepared by polymerization of a (meth)acrylic composition (MCI) comprising:

[0040] (a) 100 parts by weight of a liquid (meth)acrylic syrup (LSM1) comprising:

[0041] (ai) from 1% by weight to 50% by weight of one or more (meth) acrylic polymers (PI), and

[0042] (a2) from 50% by weight to 99% by weight of one or more monomers (meth)acrylics (Ml), each monomer (Ml) comprising only one (meth)acrylic function per monomer.

[0043] (b) from 0.002 to 10 parts by weight of an odor-masking agent comprising at less one component selected from monoesters, diesters and / or triesters, alcohols, aldehydes, ketones and terpenes or a mixture of one or more of these components,

[0044] (c) from 0.01 parts by weight to 10 parts by weight of a polymerization initiator,

[0045] gives compositions which, after polymerization, have a reduced odor or a non-detectable odor of their specific included residual monomers, compared to a composition not comprising (b). Description of the implementation methods

[0046] According to a first aspect, the present invention relates to a (meth)acrylic (MCI) composition, said composition comprising:

[0047] (a) 100 parts by weight of a liquid (meth)acrylic syrup (LSM1) comprising:

[0048] (aO of 1% by weight to 50% by weight of one or more (meth) acrylic polymers (PI), and

[0049] (a2) from 50% by weight to 99% by weight of one or more monomers (meth)acrylics (Ml), each monomer (Ml) comprising only one (meth)acrylic function per monomer.

[0050] (b) an odor-masking agent,

[0051] (c) possibly from 0.01 parts by weight to 10 parts by weight of an initiator of polymerization.

[0052] According to a second aspect, the present invention relates to a (meth)acrylic (MCI) composition, said composition comprising:

[0053] (a) 100 parts by weight of a liquid (meth)acrylic syrup (LSM1) comprising:

[0054] (aO of 1% by weight to 50% by weight of one or more (meth)acrylic (PI) polymers, and

[0055] (a2) from 50% by weight to 99% by weight of one or more monomers (meth)acrylics (Ml), each monomer (Ml) comprising only one (meth)acrylic function per monomer.

[0056] (b) from 0.002 to 10 parts by weight of an odor-masking agent comprising at less one component selected from monoesters, diesters and / or triesters, alcohols, aldehydes, ketones and terpenes or a mixture of one or more of these components,

[0057] (c) from 0.01 parts by weight to 10 parts by weight of a polymerization initiator.

[0058] According to a third aspect, the present invention relates to a preparation method of a (meth)acrylic (MCI) composition comprising the following steps:

[0059] (i) supply of 100 parts by weight of (a) a liquid (meth)acrylic syrup (LSM1) including:

[0060] (aO of 1% by weight to 50% by weight of one or more (meth) acrylic polymers (PI), and

[0061] (a2) from 50% by weight to 99% by weight of one or more monomers (meth)acrylics (Ml), each monomer (Ml) comprising only one (meth)acrylic function per monomer.

[0062] (ii) supply of an odor-masking agent,

[0063] (iii) supplying 0.01 parts by weight to 10 parts by weight of a polymerization initiator,

[0064] (iv) mixture of components.

[0065] According to a fourth aspect, the present invention relates to a process for preparing a (meth)acrylic (MCI) composition, said process comprising the following steps:

[0066] (i) supply of 100 parts by weight of (a) a liquid (meth)acrylic syrup (LSM1) including:

[0067] (aO of 1% by weight to 50% by weight of one or more (meth) acrylic polymers (PI), and

[0068] (a2) from 50% by weight to 99% by weight of one or more monomers (meth)acrylics (Ml), each monomer (Ml) comprising only one (meth)acrylic function per monomer.

[0069] (ii) supplying 0.002 to 10 parts by weight of an odor-masking agent comprising at least one component selected from monoesters, diesters and / or triesters, alcohols, aldehydes, ketones and terpenes or a mixture of one or more of these components,

[0070] (iii) the optional supply of 0.01 parts by weight to 10 parts by weight of a polymerization initiator,

[0071] (iv) mixture of components.

[0072] according to a fifth aspect, the present invention relates to the use of a (meth)acrylic composition (MCI) according to the first aspect or the second aspect to prepare a (meth)acrylic polymeric material (MPC1) or a (meth)acrylic polymeric composite material (MPCM1).

[0073] According to a sixth aspect, the present invention relates to a (meth)acrylic polymeric material (MPC1) or a (meth)acrylic polymeric composite material (MPCM1) prepared by polymerization of the (meth)acrylic composition (MCI) according to the first or second aspect.

[0074] According to a seventh aspect, the present invention relates to a process for preparing a polymeric (meth)acrylic material (MPC1), said process comprising the following steps:

[0075] (i) supply of a (meth)acrylic (MCI) composition according to the first or the second aspect,

[0076] (ii) polymerization of the (meth)acrylic (MCI) composition.

[0077] According to an eighth aspect, the present invention relates to a process for preparing a polymeric (meth)acrylic composite material (MPCM1), said process comprising the following steps:

[0078] (i) supply of a (meth)acrylic (MCI) composition according to the first or the second aspect,

[0079] (ii) contacting the (meth)acrylic (MCI) composition with a reinforcing material,

[0080] (iii) polymerization of the (meth)acrylic composition (MCI).

[0081] The term “(meth)acrylic monomer” covers both an acrylic monomer and a methacrylic monomer. Similarly, the term “(meth)acrylic polymer” covers not only an acrylic homopolymer but also a methacrylic homopolymer, an acrylic copolymer and a methacrylic copolymer.

[0082] The term “PMMA”, as used, refers to homo- and copolymers of methyl methacrylate (MMA), the weight proportion of MMA in PMMA being at least 50% by weight for the MMA copolymer.

[0083] The term "initiator", as used, refers to a chemical species that forms a compound or an intermediate compound that starts the polymerization of a monomer, which is capable of successively linking a large number of other monomers in a polymeric composite.

[0084] The term "polymer composite", as used, refers to a multicomponent material comprising several different phase domains, in which at least one type of phase domain is a continuous phase and in which at least one component is a polymer.

[0085] The term "thermoplastic," as used, refers to a polymer that transforms into a liquid or becomes more liquid or less viscous when heated and that can take on new shapes by the application of heat and possibly pressure. This also applies to slightly cross-linked thermoplastic polymers that can be thermoformed when heated above their softening temperature.

[0086] The term "odor", as used in the present invention, refers to a specific odor of a specific component or compound.

[0087] The term "odor threshold value," as used, refers to the lowest concentration of a substance that can be detected by a human nose. The odor threshold value in air of the odor-masking agent component, which is the active ingredient, is at least 0.5 ppb.

[0088] The term "odor intensity," as used, refers to the perceived strength of the odor sensation. In the present invention, it is to be from very weak to strong, preferably weak or distinct on the intensity category scale.

[0089] The term "ppm", as used, refers to parts per million by weight.

[0090] By specifying that a range goes from x to y in the present invention, this means that the upper and lower limits of this range are included, which is equivalent to at least x and up to y.

[0091] By specifying that a range is between x and y in the present invention, this means that the upper and lower limits of this range are excluded, which is equivalent to more than x and less than y.

[0092] The liquid (meth)acrylic syrup (LSM1) of the composition according to the invention comprises (a1) a (meth)acrylic polymer (PI) and (a2) a (meth)acrylic monomer (M1).

[0093] The liquid (meth)acrylic syrup (LSM1) according to the (meth)acrylic (MCI) composition of the invention comprises between 1% by weight and 50% by weight of at least one (meth)acrylic polymer (PI) and between 50% by weight and 99% by weight of at least one (meth)acrylic monomer (Ml).

[0094] Preferably, the liquid (meth)acrylic syrup (LSM1) comprises between 2% by weight and 50% by weight of a (meth)acrylic polymer (PI) and between 50% by weight and 98% by weight of a (meth)acrylic monomer (Ml), more preferably between 2% by weight and 40% by weight of a (meth)acrylic polymer (PI) and between 60% by weight and 98% by weight of a (meth)acrylic monomer (Ml), even more preferably between 3% by weight and 40% by weight of a (meth)acrylic polymer (PI) and between 60% by weight and 97% by weight of a (meth)acrylic monomer (Ml), advantageously between 3% by weight and 35% by weight of a (meth)acrylic polymer (PI) and between 65% by weight and 97% by weight of a (meth)acrylic monomer (Ml) and more advantageously between 3% by weight and 30% by weight of a (meth)acrylic polymer (PI) and between 70% by weight and 97% by weight of a (meth)acrylic monomer (Ml).

[0095] The dynamic viscosity of the liquid (meth)acrylic syrup (LMS1) is in the range of 10 mPa*s to 10,000 mPa*s, preferably from 20 mPa*s to 7,000 mPa*s, and advantageously from 20 mPa*s to 5,000 mPa*s, and more advantageously from 20 mPa*s to 2,000 mPa*s, and even more advantageously between 20 mPa*s and 1,000 mPa*s. The viscosity of the syrup can easily be measured with a rheometer or a viscometer. The dynamic viscosity is measured at 23 °C. If the liquid (meth)acrylic syrup exhibits Newtonian behavior, meaning that it does not thin under shear, the dynamic viscosity is independent of shear in a rheometer or of the velocity of the moving part in a viscometer. If the liquid composition has non-Newtonian behavior, meaning that it exhibits fluidization under shear, the dynamic viscosity is measured at a shear rate of 1 s⁻¹ at 23 °C.

[0096] With regard to the liquid (meth)acrylic syrup (LSM1), it comprises (a2) the (meth)acrylic monomer (Ml) and (aj) the (meth)acrylic polymer (PI). After polymerization of the (meth)acrylic composition (MCI), the (meth)acrylic monomer (Ml) finally polymerizes with other (meth)acrylic monomers and is transformed into a (meth)acrylic polymer (P2) comprising the monomeric units of the (meth)acrylic monomer (Ml) and other possible comonomers.

[0097] The liquid (meth)acrylic syrup (LSM1) of the (meth)acrylic (MCI) composition according to the invention may comprise a single (meth)acrylic (PI) polymer, but may also comprise a mixture of two, three (meth)acrylic (PI) polymers or even more. If there is a mixture of different (meth)acrylic (PI) polymers, the The difference is the composition of the respective (meth)acrylic polymer (PI) or the molecular weight of the respective (meth)acrylic polymer (PI) or both.

[0098] The (meth)acrylic (PI) polymer or each (meth)acrylic (PI) polymer included in the liquid (meth)acrylic syrup may in particular be selected from:

[0099] . alkyl poly(acrylates) comprising acrylate homopolymers alkyl and alkyl acrylate copolymers, and

[0100] . poly(alkyl methacrylates) comprising homopolymers of alkyl methacrylate and alkyl methacrylate copolymers.

[0101] According to a preferred embodiment, the (meth)acrylic polymer or each (PI) is a poly(methyl methacrylate) (PMMA), it being understood that, as indicated above, poly(methyl methacrylate) (PMMA) can refer to a homopolymer of methyl methacrylate (MMA) or a copolymer of MMA.

[0102] In particular, in the case where the liquid (meth)acrylic syrup (LMS1) comprises a mixture of two or more poly(methyl methacrylates) (PI), this mixture can be formed by mixing at least two homopolymers of MMA of different molecular weight, by mixing at least two copolymers of MMA having an identical monomer composition and a different molecular weight, by mixing at least two copolymers of MMA having a different monomer composition or by mixing at least one homopolymer of MMA and at least one copolymer of MMA.

[0103] According to a first preferred embodiment, the (meth)acrylic (PI) polymer is chosen from a methyl methacrylate homopolymer or a methyl methacrylate copolymer or a mixture of these, the methyl methacrylate advantageously representing at least 50% by weight of the or each (meth)acrylic (PI) polymer.

[0104] According to one embodiment of the invention, methyl methacrylate represents at least 55% by weight of the or each (meth)acrylic polymer (PI).

[0105] According to another particular embodiment, the (meth)acrylic polymer (PI) comprises at least 70%, advantageously at least 80%, preferably at least 90% and more preferably at least 95% by weight of methyl methacrylate.

[0106] When the (meth)acrylic (PI) polymer or each polymer is a copolymer of Methyl methacrylate (MMA) may include at least one comonomer containing at least one ethylenic unsaturation and capable of copolymerizing with methyl methacrylate. Examples of such comonomers include acrylic and methacrylic acids, and alkyl (meth)acrylates in which the alkyl group contains from 1 to 12 carbon atoms. Alkyl (meth)acrylates are defined as an alkyl ester of acrylic acid or methacrylic acid. Examples of comonomers include methyl acrylate and ethyl, butyl or 2-ethylhexyl (meth)acrylate.

[0107] Advantageously, the (meth)acrylic polymer (PI) or each polymer is a homopolymer of methyl methacrylate or a copolymer of methyl methacrylate and an alkyl acrylate or an alkyl methacrylate whose alkyl group contains from 1 to 12 carbon atoms, advantageously from 1 to 6 carbon atoms and preferably from 1 to 4 carbon atoms.

[0108] According to a first preferred embodiment, when the (meth)acrylic polymer (PI) is a methyl methacrylate (MMA) copolymer, this methyl methacrylate (MMA) copolymer comprises from 70% to 99.9%, advantageously from 80% to 99.9%, preferably from 90% to 99.9% and more preferably from 95% to 99.9% by weight of methyl methacrylate and from 0.1% to 30%, advantageously from 0.1% to 20%, preferably from 0.1% to 10% and more preferably from 0.1% to 5% by weight of at least one comonomer containing at least one ethylenic unsaturation copolymerizable with methyl methacrylate. Preferably, the comonomer or comonomers are chosen from methyl acrylate and ethyl acrylate.

[0109] In an advantageous variant of the first preferred embodiment, when the (meth)acrylic (PI) polymer or each polymer is a methyl methacrylate (MMA) copolymer, the (meth)acrylic (PI) polymer is a methyl methacrylate and alkyl acrylate copolymer.

[0110] In a preferred embodiment of the first preferred embodiment, when the (meth)acrylic (PI) polymer or each polymer is a methyl methacrylate (MMA) copolymer, the (meth)acrylic (PI) polymer is a methyl methacrylate and methyl acrylate or ethyl acrylate copolymer.

[0111] According to a second preferred embodiment, when the (meth)acrylic polymer (PI) is a methyl methacrylate (MMA) copolymer, this methyl methacrylate (MMA) copolymer comprises from 50% to 99.9%, advantageously from 52% to 99.9%, preferably from 53% to 99.9% and more preferably from 55% to 99.9% by weight of methyl methacrylate and from 0.1% to 50%, advantageously from 0.1% to 48%, preferably from 0.1% to 47% and more preferably from 0.1% to 45% by weight of at least one comonomer containing at least one ethylenic unsaturation copolymerizable with methyl methacrylate. Preferably, the comonomer or comonomers are chosen from methyl acrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate, butyl acrylate and butyl methacrylate.

[0112] The weight-average molecular weight, denoted Mw, of the or each (meth)acrylic polymer (PI) is generally high and can therefore be greater at 40,000 g / mol, advantageously greater than 45,000 g / mol and preferably greater than 50,000 g / mol. The average molecular weight by weight can be measured by size exclusion chromatography (SEC).

[0113] The (meth)acrylic (PI) polymer, if not crosslinked, usually has a melt mass flow rate (MFR) according to ISO 1133-2:2011 (230 °C / 3.8 kg) of between 0.1 g / 10 min and 20 g / 10 min or a melt mass flow rate of between 0.2 g / 10 min and 18 g / 10 min, or between 0.3 g / 10 min and 16 g / 10 min or between 0.4 g / 10 min and 13 g / 10 min.

[0114] The liquid (meth)acrylic syrup (LSM1) of the (meth)acrylic (MCI) composition according to the invention may comprise only one (meth)acrylic (Ml) monomer, but may equivalently comprise a mixture of two, three (meth)acrylic (Ml) monomers or even more. This would be a methacrylic (Mla) monomer, a methacrylic (Mlb) monomer, (meth)acrylic (Mlc) monomers, etc.

[0115] If the liquid (meth)acrylic syrup comprises one or more (meth)acrylic (Ml) monomers, the (meth)acrylic (Ml) monomer or each monomer comprises only one (meth)acrylic function per monomer.

[0116] With regard to the (meth)acrylic monomer (Ml), the monomer is selected from alkylacrylic monomers, alkylmethacrylic monomers, hydroxyalkylacrylic monomers, and hydroxyalkylmethacrylic monomers, and mixtures thereof. The terms "alkylacrylic monomer" or "alkylmethacrylic monomer" mean an alkyl ester of acrylic acid or methacrylic acid.

[0117] Preferably, the (meth)acrylic monomer (Ml) is selected from hydroxyalkylacrylic monomers, hydroxyalkylmethacrylic monomers, alkylacrylic monomers, alkylmethacrylic monomers and mixtures thereof, the alkyl group containing from 1 to 22 linear, branched or cyclic carbon atoms, the alkyl group preferably containing from 1 to 12 linear, branched or cyclic carbon atoms.

[0118] Advantageously, the (meth)acrylic monomer (Ml) is selected from methyl methacrylate, ethyl methacrylate, methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, n-butyl methacrylate, isobutyl methacrylate, cyclohexyl acrylate, cyclohexyl methacrylate, isobornyl acrylate, isobornyl methacrylate, hydroxyethyl acrylate and hydroxyethyl methacrylate and mixtures thereof.

[0119] According to a preferred embodiment, at least 50% by weight and preferably at least 60% by weight of the (meth)acrylic monomer (Ml) is methyl methacrylate.

[0120] According to a first more preferred embodiment, at least 50% by weight, preferably at least 60% by weight, more preferably at least 70% by weight, advantageously at least 80% by weight and even more advantageously 90% by weight of the monomer (Ml) is methyl methacrylate or a mixture of methyl methacrylate with optionally at least one other monomer.

[0121] According to a second, more preferred embodiment, the monomer (Ml) is methyl methacrylate.

[0122] In a first embodiment of the invention, the liquid (meth)acrylic syrup (LSM1) comprises:

[0123] (aO from 3% by weight to 45% by weight and preferably from 3% by weight to 40% by weight of the (meth)acrylic polymer(s) (PI), and

[0124] (a2) from 55% by weight to 97% by weight and preferably from 60% by weight to 97% in weight of the (meth)acrylic monomer(s) (Ml).

[0125] In a second embodiment of the invention, the liquid (meth)acrylic syrup (SLM1) comprises:

[0126] (aO of 10% by weight to 35% by weight and preferably of 12% by weight to 35% by weight and more preferably of 15% by weight to 30% by weight and even more preferably of 17% by weight to 30% by weight of the (meth)acrylic polymer(s) (PI), and

[0127] (a2) from 65% by weight to 90% by weight and preferably from 65% by weight to 88 % by weight and more preferably from 70% by weight to 85% by weight and even more preferably from 70% by weight to 83% by weight of the (meth)acrylic monomer(s) (Ml).

[0128] In an advantageous embodiment, the (meth)acrylic polymer or each (PI) and the (meth)acrylic monomer or each (Ml) of the liquid (meth)acrylic syrup comprise at least one of the same (meth)acrylic motif, such a embodiment making it possible to optimize the solubility of the (meth)acrylic polymer or (PI) in the (meth)acrylic monomer or (Ml).

[0129] Preferably, the (meth)acrylic polymer (PI) or each polymer is selected from a homopolymer of methyl methacrylate or a copolymer of methyl methacrylate and methyl acrylate and a copolymer of methyl methacrylate and ethyl acrylate or a copolymer of methyl methacrylate and butyl acrylate or a copolymer of methyl methacrylate and butyl methacrylate, the respective comonomer being present at most 45% by weight in the copolymer.

[0130] In a first advantageous embodiment, the liquid (meth)acrylic syrup comprises a (meth)acrylic (PI) polymer, rather than a mixture of (meth)acrylic (PI) polymers.

[0131] In a second advantageous embodiment, the liquid (meth)acrylic syrup comprises a mixture of two (meth)acrylic (PI) polymers.

[0132] Stabilizers, or reaction inhibitors, may also be present in the liquid (meth)acrylic syrup (LSM1) to prevent spontaneous polymerization of the (meth)acrylic monomer(s) (Ml).

[0133] These stabilizers can in particular be chosen from hydroquinone (HQ), hydroquinone monomethyl ether (HQME), 2,6-di-tert-butyl-4-methylphenol (BHT), 2,6-di-tert-butyl-4-methoxyphenol (Topanol O) and 2,4-dimethyl-6-tert-butylphenol (Topanol A).

[0134] These stabilizers may be present in the liquid (meth)acrylic syrup in a proportion not exceeding 5 parts by weight, advantageously not exceeding 4 parts by weight and preferably in a proportion between 0.3 and 3 parts by weight, for 100 parts by weight of the sum of the (meth)acrylic polymer(s) (PI) and the (meth)acrylic monomer(s) (Ml).

[0135] With regard to the odor-masking agent of the (meth)acrylic (MCI) composition, the odor-masking agent content is expressed on the basis of the sum of the components (aj and (a2) of the liquid (meth)acrylic syrup (LSM1).

[0136] The odor-masking agent is different from the components already present in the liquid (meth)acrylic syrup (LSM1).

[0137] The odor-masking agent is present at a rate of 0.002 to 10 parts by weight of at least one component selected from monoesters, diesters and / or triesters, alcohols, aldehydes, ketones and terpenes or a mixture of one or more of these components.

[0138] The quantity of masking agent (component (b)) can vary in large proportions within the range indicated above, depending on the desired effect, the intensity of the odor to be masked, the respective residual levels of the different monomers and by-products that may be present in component (a) as defined above before and after polymerization, etc.

[0139] Amounts of masking agent less than 0.002 parts by weight may be too low to achieve the desired effect. Amounts of masking agent greater than 10 parts by weight may have harmful effects depending on the intended applications.

[0140] Preferably, and without limitation, the content of odor-masking agent(s) b) is between 0.002 and 10 parts by weight relative to 100 parts by weight of liquid (meth)acrylic syrup (LSM1), and preferably between 0.004 and 8 parts by weight.

[0141] In a first preferred embodiment, the content of odor-masking agent is at least 0.005 part by weight.

[0142] In a second preferred embodiment, the content of odor-masking agent is at least 0.01 part by weight.

[0143] In a third preferred embodiment, the content of odor-masking agent is 0.02 parts by weight.

[0144] In a fourth preferred embodiment, the content of odor-masking agent is between 0.005 and 8 parts by weight.

[0145] In a fifth preferred embodiment, the content of odor-masking agent is between 0.01 and 8 parts by weight.

[0146] In a sixth preferred embodiment, the content of odor-masking agent is between 0.01 and 6 parts by weight.

[0147] In a seventh preferred embodiment, the content of odor-masking agent is between 0.01 and 5 parts by weight.

[0148] As previously stated, the odor-masking agent (b) comprises one or more compounds selected from:

[0149] (bl) monoesters;

[0150] (b2) the diesters and / or triesters;

[0151] (b3) alcohols, advantageously monoalcohols, comprising from 1 to 30 atoms of carbon, preferably of 6 to 20 carbon atoms and more preferably of 8 to 11 carbon atoms, said carbon atoms forming a linear or branched chain possibly comprising one or more unsaturations in the form of double bonds, and possibly comprising a cyclic structure of 5 or 6 links, saturated or partially or totally unsaturated;

[0152] (b4) aldehydes and / or ketones, in particular O=CH-Rb aldehydes and / or ketones of the formula Ra-CO-Rb, in which Ra represents a linear or branched hydrocarbon chain comprising from 1 to 6 carbon atoms, optionally having one or more double bonds, and Rb represents a cyclic hydrocarbon chain or a linear or branched hydrocarbon chain, optionally, but preferably, substituted by a cyclic structure, Rb comprising from 2 to 29 carbon atoms, preferably from 3 to 15, and more preferably from 6 to 12 carbon atoms, optionally comprising one or more double bonds and optionally being substituted by one or more hydroxyl groups; and

[0153] (b5) terpenes.

[0154] By way of illustrative but not limiting examples of monoesters mentioned in (bl), one may cite the esters of saturated or unsaturated C2-C2o acids such as acetates, propionates, butyrates, methylbutyrates, pentanoates, hexanoates, heptanoates, caproates, oleates, linoleates or linolenates of ethyl, propyl, butyl, pentyl, 2-methylbutyl, isoamyl, hexyl, benzyl, phenylethyl, menthyl, carvyl and analogues, and also mixtures thereof.

[0155] Isoamyl acetate, hexyl acetate, 2-methylbutyl butyrate, isoamyl butyrate, benzyl acetate, phenylethyl acetate and mixtures of these compounds are particularly preferred.

[0156] By way of illustrative but not limiting examples of diesters and / or triesters (b2), one may cite ort / zo-phthalates such as diethyl zo-phthalate, citrates such as triethyl citrate, and / or malonates such as diethyl malonate.

[0157] By way of illustrative but not limiting examples of (b3) alcohols mentioned above, one may preferably cite monoalcohols in which the hydroxyl function is preferably borne by an sp2 carbon atom. It should be understood that the hydroxyl function may also be borne by a carbon atom included in a cyclic structure as defined above.

[0158] Alcohols (b3) usable in the odor-masking agent and as defined above are advantageously and by way of non-limiting examples selected from menthol, neo-menthol, phenylethyl alcohol, benzyl alcohol, citronellol, dihydromyrcenol, dihydroterpineol, dimetol, ethyllinalool, geraniol, linalool, tetrahydrolinalool, tetrahydromyrcenol, nerol, and analogues, as well as mixtures of at least two of these compounds.

[0159] By way of illustrative but not limiting examples of aldehydes and ketones mentioned in (b4), propionaldehyde, butyraldehyde, valeraldehyde, capraldehyde, benzaldehyde, geranial, neral, citral, citronellal and, in general, aldehydes containing hydrocarbon groups having one or more olefinic unsaturations, menthone, isomenthone, 1,8-cineole, ascaridole, flavonone, damascones, damascenones, ionones, irisones, methylionones, frambinone, and analogs, as well as mixtures of at least two of these compounds in any proportions, may preferably be cited.

[0160] By way of illustrative but not limiting examples of terpenes indicated in (b5), terpinenes, myrcene, limonene, terpinolene, pinenes, sabinene, camphene and analogues, mixtures of at least two of these compounds, and also essences based on terpenes, in particular those which contain these ingredients.

[0161] In addition, the odor-masking agent (b) which can be used in the context of the present invention may include, in minor quantities, other agents (fragrances) commonly used in the field of perfumery.

[0162] For the sake of completeness, the odor-masking agent may also comprise at least two of the aforementioned groups or be part of more than one compound from the list of compounds (bl) to (b5). For example, 3,7-diethylocta-l,6-dien-3-yl acetate (linanyl acetate), a terpene with an ester group, or 3,7-dimethyloct-6-en-l-ol (citronellol), a terpene with an alcohol group, or 3,7-demethylocta-2,6-dienal (citral), a terpene with an aldehyde group.

[0163] In a first preferred embodiment, the odor-masking agent is chosen from (bl) monoesters, more preferably from the respective list of exemplary compounds.

[0164] In a second preferred embodiment, the odor-masking agent is chosen from (b2) the diesters and / or triesters, more preferably from the respective list of exemplary compounds.

[0165] In a third preferred embodiment, the odor-masking agent is chosen from (b3) alcohols, advantageously monoalcohols, more preferably from the respective list of exemplary compounds.

[0166] In a fourth preferred embodiment, the odor-masking agent is chosen from (b4) aldehydes and / or ketones, more preferably from the respective list of exemplary compounds.

[0167] In a fifth preferred embodiment, the odor-masking agent is chosen from among the terpenes (b5), more preferably from the respective list of exemplary compounds.

[0168] In a sixth preferred embodiment, the odor-masking agent comprises at least two of the components (bl), (b2), (b3), (b4) and (b5), more preferably the compounds from the list of exemplary compounds.

[0169] In a seventh preferred embodiment, the odor-masking agent comprises at least three of the components (bl), (b2), (b3), (b4) and (b5), more preferably the compounds from the list of exemplary compounds.

[0170] In a seventh preferred embodiment, the odor-masking agent comprises at least four of the components (bl), (b2), (b3), (b4) and (b5), more preferably the compounds from the list of exemplary compounds.

[0171] The (meth)acrylic (MCI) composition according to one aspect of the invention also includes a polymerization initiator, the function of which is to ensure the start of the polymerization of the (meth)acrylic (Ml) monomer.

[0172] The polymerization initiator can be chosen from organic peroxides, peroxyesters, peroxyacetals and azo-type compounds.

[0173] The polymerization initiator may in particular be chosen from among diacyl peroxides, peroxyesters, peroxydicarbonates, dialkyl peroxides, peroxyacetals, hydroperoxides or peroxyketals.

[0174] The (meth)acrylic (MCI) composition according to the invention may comprise from 0.01 part by weight to 5 parts by weight of polymerization initiator.

[0175] According to a particular embodiment, the (meth)acrylic (MCI) composition according to the invention comprises from 0.02 parts by weight to 4 parts by weight and advantageously from 0.03 parts by weight to 3 parts by weight of polymerization initiator for 100 parts by weight of liquid (meth)acrylic syrup.

[0176] The (meth)acrylic (MCI) composition according to the invention may also include, in certain aspects, a polymerization activator or accelerator.

[0177] According to a particular embodiment, the (meth)acrylic composition according to the invention comprises between 100 ppm and 10,000 ppm, advantageously between 100 ppm and 7,000 ppm and preferably between 200 ppm and 5,000 ppm of polymerization activator or accelerator for 100 parts by weight of the (meth)acrylic syrup.

[0178] The present invention also relates to a method for preparing a (meth)acrylic (MCI) composition.

[0179] According to the invention, this process comprises the following steps: supplying the respective components and iv) mixing the components.

[0180] Step iv) of the preparation process according to the invention is carried out by mixing all the components included in the (meth)acrylic composition (MCI). In one embodiment, care is taken to first prepare the liquid (meth)acrylic syrup (LMS1) and then to introduce into this (meth)acrylic syrup (LMS1) the odor-masking agent and, where applicable, the polymerization activator or accelerator, the polymerization initiator being introduced last.

[0181] This mixing can be done manually or using a mixing means.

[0182] Optionally, the mixing is carried out by stirring, and for a period of between 1 minute and 36 hours, advantageously between 2 minutes and 24 hours, more advantageously between 3 minutes and 24 hours and preferably between 4 minutes and 24 hours.

[0183] The (meth)acrylic (MCI) composition comprising all components or other components possibly added has a viscosity between 10 mPa*s and 10,000 MPa*s at 23 °C.

[0184] Preferably, the viscosity of the (meth)acrylic composition (MCI) comprising the components at 23 °C is in a range of 50 mPa*s to 10,000 mPa*s, more preferably from 50 mPa*s to 9,000 mPa*s, even more preferably from 50 mPa*s to 8,000 mPa*s, even more preferably from 50 mPa*s to 7,500 Pa*s, even more preferably between 50 mPa*s and 7,000 mPa*s, advantageously between 50 mPa*s and 6,000 mPa*s and more advantageously between 50 mPa*s and 5,000 mPa*s.

[0185] The (meth)acrylic composition (MCI) according to the first aspect or the second aspect is used to prepare a (meth)acrylic polymeric material (MPC1) or a (meth)acrylic polymeric composite material (MPCM1).

[0186] the (meth)acrylic polymeric material (MPC1) or the (meth)acrylic polymeric composite material (MPCM1) is prepared by polymerization of the (meth)acrylic composition (MCI) according to the first aspect or the second aspect.

[0187] The invention relates to a process for preparing a polymeric (meth)acrylic material (MPC1), said process comprising the following steps:

[0188] (i) supply of a (meth)acrylic (MCI) composition according to the first or the second aspect,

[0189] (ii) polymerization of the (meth)acrylic (MCI) composition.

[0190] The invention relates to a process for preparing a polymeric (meth)acrylic composite material (MPCM1), said process comprising the following steps:

[0191] (i) supply of a (meth)acrylic (MCI) composition according to the first or the second aspect,

[0192] (ii) contacting the (meth)acrylic (MCI) composition with a reinforcing material,

[0193] (iii) polymerization of the (meth)acrylic (MCI) composition.

[0194] In one embodiment, the reinforcing material is a fibrous substrate. The fibers of the fibrous substrate in the present invention are long fibers or continuous fibers. The fibrous substrate preferably comprises fibers having an aspect ratio of at least 1,000, preferably at least 2,000, more preferably at least 4,000, advantageously at least 7,000, and most advantageously at least 10,000, or continuous fibers. A fiber is defined by its aspect ratio, which is the ratio of the fiber's length to its diameter.

[0195] The fibrous substrate of the present invention is selected from plant fibers, wood fibers, animal fibers, mineral fibers, synthetic polymer fibers, glass fibers and carbon fibers, and mixtures thereof.

[0196] The fibers of the fibrous material have a diameter between 0.005 pm and 100 pm, preferably between 1 pm and 50 pm, more preferably between 5 pm and 30 pm and advantageously between 10 pm and 25 pm.

[0197] In another embodiment, the reinforcing material is a mineral filler. The mineral filler C may in particular comprise a filler Cl selected from quartz, granite, marble, feldspar, clay, glass, ceramics, mica, graphite, silicates, carbonates, carbides, sulfates, silicates, hydroxides, metal oxides, metals and corresponding mixtures.

[0198] The step of contacting the (meth)acrylic composition (MCI) with a reinforcing material

[0199] With regard to the process for preparing a polymeric (meth)acrylic composite material (MPCM1), several processes could be used, including the step of contacting the (meth)acrylic composition (MCI) with a reinforcing material for a fibrous substrate. These include infusion, vacuum bag molding, pressure bag molding, autoclave molding, resin transfer molding (RTM), reaction injection molding (RIM), reinforced reaction injection molding (R-RIM) and its variants, press molding or compression molding, pultrusion, and filament winding.

[0200] With regard to the applications of the polymeric (meth)acrylic composite material (MPCM1), one can mention automotive and motorsport applications such as, for example, a pressure vessel, ballistic and defense applications, marine applications, railway and transport applications, sports, leisure and recreational applications, art and entertainment applications, aeronautical and aerospace applications, construction and civil engineering applications, oil and gas applications, renewable industries applications such as photovoltaic applications and wind energy applications.

[0201] With regard to the use of mechanical parts made of polymeric (meth)acrylic composite material (MPCM1) thus manufactured, one can mention automotive applications, transport applications such as buses or trucks, marine applications, railway applications, sports applications, aeronautical and aerospace applications, photovoltaic applications, computer applications, construction and building applications, telecommunications applications and wind energy applications.

[0202] The mechanical part made of polymeric (meth)acrylic composite material (MPCM1) is in particular a motor vehicle part, a boat part, a bus part, a train part, a sporting article, an airplane or helicopter part, a spacecraft or rocket part, a photovoltaic module part, a pressure vessel, a construction or building material, a wind turbine part, for example a wind turbine blade beam spar flange, a piece of furniture, a construction or building part. [Processes]

[0203] The weight-average molecular weight can be measured by size-exclusion chromatography (SEC). The chromatography column is calibrated with PMMA references have a molecular weight ranging from 402 g / mol to 1,900,000 g / mol. The average molecular weight is expressed in g / mol for the number and average molecular weights Mn and Mw, respectively. For measurement purposes, the concentration is 1 g / L.

[0204] The viscosity of (meth)acrylic compositions comprising at least components a1) and a2) is measured using a Brookfield viscometer at 23 °C, according to ISO 2555:2018 “Plastics — Resins in liquid state or in emulsions or dispersions — Determination of apparent viscosity by the method of the single-cylinder type rotary viscometer”.

[0205] The odor is detected by a panel of people. Examples

[0206] The compounds used for the preparation of the various (meth)acrylic compositions are as follows:

[0207] - as a (meth)acrylic (PI) polymer, a PMMA formed by a copolymer of methyl methacrylate and ethyl acrylate, marketed by the company Altuglas under the name Altuglas® BS 520B,

[0208] - as (meth)acrylic (Ml) monomer, a stabilized methyl methacrylate with hydroquinone monomethyl ether, F,

[0209] - as an odor-masking agent, 3,7-demethylocta-2,6-dienal,

[0210] - as an initiator, benzoyl peroxide (BPO).

[0211] A syrup is prepared by first dissolving 20 parts by weight of the respective (meth)acrylic (PI) polymer in 80 parts by weight of the respective (meth)acrylic (Ml) monomer, according to Table 1. The syrup is separated into two halves and 5 parts by weight of odor-masking agent are added to one half.

[0212] Table 1 - Compositions of the respective liquid (meth)acrylic syrups (LSM1) [Tables 1] Comparative Example Example 1 (PI) 20 parts 20 parts (Ml) 80 parts 80 parts Odor masking agent s 0 parts 5 parts

[0213] The composition of the comparative example has the strong odor characteristic of methyl methacrylate, whereas the example has none or very little of it.

[0214] To both compositions, 3 parts of BPO initiator are added and the compositions are polymerized in a closed mold at 90 °C for 15 min to prepare a sheet-shaped (meth)acrylic polymeric material (MCP1).

[0215] The sheet obtained from the composition of the comparative example has a slight residual methyl methacrylate odor, whereas the sheet obtained from the composition of the example does not.

Claims

Demands

1. (Meth)acrylic (MCI) composition comprising: (a) 100 parts by weight of a liquid (meth)acrylic syrup (LSM1) comprising: (a2) 1% by weight to 50% by weight of one or more (meth)acrylic polymers (PI), and (a3) ​​50% by weight to 99% by weight of one or more (meth)acrylic monomers (Ml), each monomer (Ml) comprising only one (meth)acrylic function per monomer, (b) an odor-masking agent, (c) optionally 0.01 part by weight to 10 parts by weight of a polymerization initiator.

2. (Method)acrylic (MCI) composition according to claim 1, comprising from 0.002 to 10 parts by weight of odor-masking agent comprising at least one component selected from (b1) monoesters, (b2) diesters and / or triesters, (b3) alcohols, (b4) aldehydes and / or ketones and (b5) terpenes or a mixture of one or more of these components.

3. (Meth)acrylic (MCI) composition according to claim 1, characterized in that the odor-masking agent (b) comprises one or more compounds selected from: (b1) monoesters; (b2) diesters and / or triesters; (b3) alcohols, advantageously monoalcohols, comprising from 1 to 30 carbon atoms, preferably from 6 to 20 carbon atoms and more preferably from 8 to 11 carbon atoms, said carbon atoms forming a linear or branched chain optionally comprising one or more unsaturations in the form of double bonds, and optionally comprising a 5- or 6-membered cyclic structure, saturated or partially or totally unsaturated;(b4) aldehydes and / or ketones, in particular aldehydes O=CH-Rb and / or ketones of formula Ra-CO-Rb, in which Ra represents a linear or branched hydrocarbon chain comprising from 1 to 6 carbon atoms, optionally comprising one or more unsaturations in the form of double bonds, and Rb represents a cyclic hydrocarbon chain or a linear or branched hydrocarbon chain, optionally, but preferably, substituted by a; cyclic structure, Rb comprising from 2 to 29 carbon atoms, preferably from 3 to 15, and more preferably from 6 to 12 carbon atoms, possibly comprising one or more unsaturations in the form of double bonds and possibly substituted by one or more hydroxyl groups; and (b5) terpenes.

4. (Meth)acrylic (MCI) composition according to any one of claims 1 to 3, characterized in that the liquid (meth)acrylic syrup (LSM1) comprises: (ai) 10 wt% to 35 wt% of one or more (meth)acrylic polymers (PI), and (a2) 65 wt% to 90 wt% of one or more (meth)acrylic monomers (Ml), each monomer (Ml) comprising only one (meth)acrylic function per monomer.

5. (Meth)acrylic (MCI) composition according to any one of claims 1 to 4, characterized in that the content of odor-masking agent is between 0.01 and 5 parts by weight.

6. (Method)acrylic (MCI) composition according to any one of claims 1 to 5, characterized in that the odor-masking agent is selected from monoesters (bl).

7. (Method)acrylic (MCI) composition according to claim 6, characterized in that the monoesters (bl) are selected from isoamyl acetate, hexyl acetate, 2-methylbutyl butyrate, isoamyl butyrate, benzyl acetate, phenylethyl acetate, and mixtures of these compounds.

8. (Meth)acrylic (MCI) composition according to any one of claims 1 to 5, characterized in that the odor-masking agent is selected from the diesters and / or triesters (b2).

9. (Method)acrylic (MCI) composition according to claim 8, characterized in that the diesters and / or triesters (b2) are selected from ortho-phthalates, such as diethyl ortho-phthalate, citrates such as triethyl citrate, and / or malonates such as diethyl malonate.

10. (Meth)acrylic (MCI) composition according to any one of claims 1 to 5, characterized in that the odor-masking agent is selected from alcohols (b3).

11. (Meth)acrylic (MCI) composition according to claim 10, characterized in that the alcohols (b3) are selected from menthol, neo-menthol, phenylethyl alcohol, benzyl alcohol, citronellol, dihydromyrcenol, dihydroterpineol, dimetol, ethyllinalool, geraniol, linalool, tetrahydrolinalool, tetrahydromyrcenol, nerol, and analogues, and also mixtures of at least two of these compounds.

12. (Meth)acrylic (MCI) composition according to any one of claims 1 to 5, characterized in that the odor-masking agent is selected from aldehydes and / or ketones (b4).

13. (Meth)acrylic (MCI) composition according to claim 12, characterized in that the aldehydes and / or ketones (b4) are selected from propionaldehyde, butyraldehyde, valeraldehyde, capraldehyde, benzaldehyde, geranial, neral, citral, citronellal and, in general, aldehydes containing hydrocarbon groups comprising one or more olefinic-type unsaturations, menthone, isomenthone, 1,8-cineole, ascaridole, flavonone, damascones, damascenones, ionones, irisones, methylionones, frambinone, and analogs, and also mixtures of at least two of these compounds in any proportions.

14. (Meth)acrylic (MCI) composition according to any one of claims 1 to 5, characterized in that the odor-masking agent is selected from terpenes (b5).

15. (Meth)acrylic (MCI) composition according to claim 14, characterized in that the terpenes (b5) are selected from terpinenes, myrcene, limonene, terpinolene, pinenes, sabinene, camphene and analogues, and mixtures of at least two of these compounds.

16. (Metha)acrylic (MCI) composition according to any one of claims 2 to 5, characterized in that the odor-masking agent is selected from at least two of the components (b1), (b2), (b3), (b4) and (b5).

17. (Meth)acrylic (MCI) composition according to any one of claims 1 to 16, characterized in that the polymerization initiator is selected from diacyl peroxides, peroxyesters, peroxydicarbonates, dialkyl peroxides, peroxyacetals, hydroperoxides or peroxyketals.

18. A process for preparing the (meth)acrylic (MCI) composition according to any one of claims 1 to 17, comprising the following steps: (i) supplying 100 parts by weight of (a) a liquid (meth)acrylic syrup (LSM1) comprising: (a2) 1% to 50% by weight of one or more (meth)acrylic polymers (PI), and (a3) ​​50% to 99% by weight of one or more (meth)acrylic monomers (Ml), each monomer (Ml) comprising only one (meth)acrylic function per monomer, (ii) supplying 0.002 to 10 parts by weight of an odor-masking agent comprising at least one component selected from monoesters, diesters and / or triesters, alcohols, aldehydes, ketones, and terpenes, or a mixture of one or more of these components, (iii) supplying, if necessary, 0.01 parts by weight to 10 parts by weight of a polymerization initiator (iv) mixing of the components.

19. Use of the (meth)acrylic composition (MCI) according to any one of claims 1 to 17 to prepare a (meth)acrylic polymeric material (MCP1) or a (meth)acrylic polymeric composite material (MPCM1).

20. (Method)acrylic polymeric material (MCP1) prepared by polymerization of the (meth)acrylic composition (MCI) according to any one of claims 1 to 17.

21. (Method)acrylic polymeric composite material (MPCM1) prepared by polymerization of the (meth)acrylic composition (MCI) according to any one of claims 1 to 17.

22. A process for preparing a (meth)acrylic polymeric material (MCP1) comprising the following steps: (i) supplying a (meth)acrylic composition (MCI) according to any one of claims 1 to 17, (ii) polymerizing the (meth)acrylic composition (MCI).

23. A process for preparing a polymeric (meth)acrylic composite material (MCPM1) comprising the following steps: (i) providing a (meth)acrylic (MCI) composition according to any one of claims 1 to 17, (ii) contacting the (meth)acrylic (MCI) composition with a reinforcing material, (iii) polymerization of the (meth)acrylic (MCI) composition.