Resin composition, resin, and product to be used in home in contact with water

Abstract

The present disclosure provides a resin composition capable of improving mechanical characteristics of a resin obtained by curing. The resin composition includes: a resin containing an ethylenically unsaturated group; glycol lignin; an organic peroxide; and an additive comprising at least one of a terpene phenolic resin and a phosphoric acid ester.

Description

Resin composition, resin and water-related products

[0001] The present disclosure relates to a resin composition, a resin, and a wet product, and more particularly to a resin composition containing glycol lignin, a resin including a cured product of this resin composition, and a wet product made from this resin.

[0002] In recent years, biomass-derived materials have been used to prevent environmental destruction, replacing petroleum-derived raw materials such as polyethylene powder and mined materials such as calcium carbonate fillers. Glycol lignin, which can be extracted from wood such as cedar, is one such biomass-derived material, and its use as a thermosetting resin material is being considered.

[0003] Patent Document 1 discloses a resin using glycol lignin, which is obtained by adding a resin modifier or an ultraviolet absorber made of a glycol alkylene oxide adduct in which an alkylene oxide is added to glycol lignin to a thermoplastic resin.

[0004] However, the conventional resins obtained using glycol lignin have the disadvantage of having low mechanical properties such as bending strength.

[0005] Japanese Patent Application Laid-Open No. 2023-137637

[0006] An object of the present disclosure is to provide a resin composition, a resin, and a water-related product that can improve the mechanical properties of the resin obtained by curing.

[0007] A resin composition according to one embodiment of the present disclosure contains a resin containing an ethylenically unsaturated group, glycol lignin, an organic peroxide, and an additive comprising at least one of a terpene phenol resin and a phosphoric acid ester.

[0008] A resin according to one embodiment of the present disclosure includes a cured product of a resin composition containing a resin having an ethylenically unsaturated group, glycol lignin, an organic peroxide, and an additive consisting of at least one of a terpene phenol resin and a phosphoric acid ester.

[0009] A plumbing product according to one aspect of the present disclosure is made from the resin.

[0010] 1. Overview The resin composition according to this embodiment (hereinafter also referred to as composition (X)) contains a resin containing an ethylenically unsaturated group (hereinafter also referred to as resin (A)), glycol lignin (hereinafter also referred to as glycol lignin (B)), an organic peroxide (hereinafter also referred to as organic peroxide (C)), and an additive consisting of at least one of a terpene phenol resin and a phosphate ester (hereinafter also referred to as additive (D)).

[0011] The inventors have conducted extensive research to solve the above-mentioned problems, and have found that in a resin (hereinafter also referred to as resin (Y)) obtained by curing composition (X) containing resin (A), glycol lignin (B), and organic peroxide (C), the mechanical properties of resin (Y) can be changed by adding a specific additive (D) to composition (X), and have completed the present disclosure.

[0012] Composition (X) can improve the mechanical properties of resin (Y) obtained by curing. The reason why composition (X) exhibits the above-described effect due to its configuration is not entirely clear, but can be presumed, for example, as follows. Heating composition (X) decomposes organic peroxide (C) to generate radicals, polymerizing resin (A) containing an ethylenically unsaturated group, and forming resin (Y) containing glycol lignin (B) in the polymer of resin (A). It is believed that adding at least one of a terpene phenol resin and a phosphate ester as additive (D) to composition (X) enhances the adhesion and affinity at the interface between the polymer of resin (A) and glycol lignin (B) in resin (Y), resulting in improved mechanical properties such as bending strength of resin (Y).

[0013] The resin (Y) according to this embodiment includes a cured product of a composition (X) containing a resin (A) containing an ethylenically unsaturated group, glycol lignin (B), an organic peroxide (C), and an additive (D) consisting of at least one of a terpene phenol resin and a phosphoric acid ester.

[0014] Resin (Y) contains the cured product of composition (X) described above, and therefore has improved mechanical properties.

[0015] The plumbing product according to this embodiment (hereinafter also referred to as plumbing product (Z)) is made of resin (Y). Resin (Y) has excellent water resistance and heat resistance, making it suitable for use in plumbing applications. Since plumbing product (Z) uses resin (Y) with the improved mechanical properties described above, it can be suitably used as plumbing components, products, etc. that require high durability.

[0016] As described above, the present disclosure provides a resin composition that can improve the mechanical properties of the resin obtained by curing, a resin containing the cured product of the resin composition, and a plumbing product made from the resin. Furthermore, the present disclosure can prevent environmental destruction by promoting the distribution of products using resins that use biomass materials and have improved mechanical properties.

[0017] 2. Details <Resin Composition> Composition (X) contains resin (A), glycol lignin (B), organic peroxide (C), and additive (D). Additive (D) is at least one of a terpene phenol resin and a phosphate ester. Composition (X) may further contain components other than components (A) to (D) within a range that does not impair the effects of the present disclosure. Each component will be described below.

[0018] [Resin (A)] The resin (A) is a resin containing an ethylenically unsaturated group. One or more types of resin (A) can be used.

[0019] "Resin containing an ethylenically unsaturated group" refers to a resin containing a polymer, oligomer, or a combination thereof, and one or more ethylenically unsaturated groups. Therefore, resin (A) includes a mixture of a polymer and / or oligomer that does not have an ethylenically unsaturated group and a monomer that has an ethylenically unsaturated group, such as a (meth)acrylic acid ester or styrene. In this specification, "(meth)acrylic" means either or both of acrylic and methacrylic.

[0020] The term "ethylenically unsaturated group" refers to a group containing a carbon-carbon double bond other than the conjugated double bond of an aromatic ring. When composition (X) is heated, radicals generated by decomposition of organic peroxide (C) polymerize resin (A) containing an ethylenically unsaturated group, and composition (X) is cured. In other words, resin (A) is a thermosetting resin. By curing composition (X), resin (Y) is formed, which is a mixture of a polymer of resin (A) and glycol lignin (B).

[0021] Examples of the ethylenically unsaturated group include monovalent groups such as vinyl, allyl, styryl and (meth)acryloyl groups; and divalent groups such as vinylene groups.

[0022] Examples of the resin (A) include vinyl ester resins, acrylic resins, unsaturated polyester resins, resins containing polymers of compounds having vinyl groups and compounds having vinyl groups, and polymers of compounds having conjugated double bonds.

[0023] The term "vinyl ester resin" refers to a resin in which a vinyl ester is dissolved in a monomer having an ethylenically unsaturated group. The term "vinyl ester" refers to a resin containing an ester group formed by the reaction of an epoxy group of an epoxy resin with a carboxy group of an unsaturated carboxylic acid having a vinyl group, such as (meth)acrylic acid.

[0024] Examples of vinyl esters include epoxy (meth)acrylates such as (meth)acrylate-modified bisphenol epoxy resins such as bisphenol A epoxy resins. Examples of monomers having an ethylenically unsaturated group include styrene and (meth)acrylic acid esters.

[0025] The vinyl ester resin is preferably a resin containing a vinyl ester and a styrene monomer, and more preferably a resin containing a (meth)acrylate-modified bisphenol-type epoxy resin and a styrene monomer.

[0026] The term "acrylic resin" refers to an acrylic syrup which is a mixture of a polymer of a monomer containing (meth)acrylic acid and / or a (meth)acrylic acid ester and a monomer containing (meth)acrylic acid and / or a (meth)acrylic acid ester.

[0027] Examples of acrylic resins include mixtures of polymers such as poly(meth)acrylic acid esters, such as polymethyl (meth)acrylate, and monomers such as (meth)acrylic acid esters, such as methyl (meth)acrylate.

[0028] The term "unsaturated polyester resin" refers to a resin in which an unsaturated polyester is dissolved in a monomer having an ethylenically unsaturated group. The term "unsaturated polyester" refers to a polyester resin having an ethylenically unsaturated group.

[0029] Examples of unsaturated polyesters include resins obtained by esterifying an unsaturated dicarboxylic acid or its anhydride, such as maleic anhydride or fumaric acid, a saturated dicarboxylic acid or its anhydride, such as phthalic anhydride or isophthalic acid, and an aliphatic diol, such as ethylene glycol or propylene glycol. Examples of monomers having an ethylenically unsaturated group include styrene and (meth)acrylic acid esters.

[0030] The unsaturated polyester resin is preferably a resin containing a polycondensate of a saturated dicarboxylic acid, an unsaturated dicarboxylic acid and an aliphatic diol, and a styrene monomer.

[0031] Examples of the resin containing a polymer of a compound having a vinyl group and a compound having a vinyl group include a mixture of polystyrene, which is a polymer of a styrene monomer, and a styrene monomer.

[0032] Examples of polymers of compounds having conjugated double bonds include polymers of compounds containing conjugated double bonds such as butadiene and isoprene.

[0033] Resin (A) preferably contains at least one resin selected from the group consisting of vinyl ester resins, acrylic resins, and unsaturated polyester resins, which can further improve the mechanical properties of resin (Y) obtained by curing composition (X).

[0034] The proportion of resin (A) relative to composition (X) is, for example, 40% by mass or more and 95% by mass or less, preferably 50% by mass or more and 90% by mass or less, more preferably 60% by mass or more and 85% by mass or less, and particularly preferably 70% by mass or more and 80% by mass or less.

[0035] [Glycol lignin (B)] In this specification, "glycol lignin" refers to polyethylene glycol-modified lignin (PEG lignin) obtained by solvolyzing lignocellulose using polyethylene glycol as a solvent. That is, glycol lignin (B) is a lignin in which some or all of the hydrogen atoms of the alcoholic hydroxyl groups at the benzylic positions are substituted with polyethylene glycol chains, and in the following formula (1) showing the partial structure of glycol lignin, R １ is the oxygen atom of a phenolic hydroxyl group, and R ２ is an alcoholic hydroxyl group at the benzyl position or a polyethylene glycol chain (in formula (1), * indicates a bonding site to a methyl group or an adjacent partial structure). As glycol lignin (B), one or more types can be used.

[0036]

[0037] The molecular formula weight of the polyethylene glycol chain in the glycol lignin (B) is, for example, from 100 to 800, and preferably from 200 to 600. The weight average molecular weight (value calculated as standard polystyrene by GPC measurement) of the glycol lignin (B) is, for example, from 5,000 to 20,000, and preferably from 8,000 to 12,000. The amount of hydroxyl groups in the glycol lignin (B) is, for example, from 3 mmol / g to 8 mmol / g, and preferably from 4.5 mmol / g to 6.5 mmol / g.

[0038] The glycol lignin (B) blended in the preparation of composition (X) may be in powder form. Even when a powdered glycol lignin (B) is used, the mechanical properties of resin (Y) obtained by curing composition (X) can be improved. When glycol lignin (B) is in powder form, the D50 particle size (cumulative median value on a volume basis) of glycol lignin (B) is, for example, 10 μm or more and 100 μm or less, and preferably 26 μm or more and 70 μm or less.

[0039] The proportion of glycol lignin (B) is, for example, 100 parts by mass or less relative to 100 parts by mass of resin (A). In this case, resin (A) and glycol lignin (B) can be easily mixed with each other. Furthermore, from the viewpoint of the handleability of composition (X), the proportion of glycol lignin (B) is preferably 50 parts by mass or less relative to 100 parts by mass of resin (A). If this proportion exceeds 50 parts by mass, the viscosity of the composition increases and handleability decreases. The proportion of glycol lignin (B) is more preferably 40 parts by mass or less, and even more preferably 35 parts by mass or less, relative to 100 parts by mass of resin (A). The proportion of glycol lignin (B) is, for example, 1 part by mass or more relative to 100 parts by mass of resin (A). If this proportion is less than 1 part by mass, the effect of improving the mechanical properties of resin (Y) may not be clearly manifested. The proportion of glycol lignin (B) is preferably 5 parts by mass or more, more preferably 10 parts by mass or more, even more preferably 20 parts by mass or more, and particularly preferably 25 parts by mass or more.

[0040] The proportion of glycol lignin (B) relative to composition (X) is preferably 35% by mass or less, more preferably 30% by mass or less, and even more preferably 25% by mass. The proportion of glycol lignin (B) relative to composition (X) is preferably 1% by mass or more, more preferably 5% by mass or more, even more preferably 10% by mass or more, and particularly preferably 20 parts by mass or more.

[0041] [Organic Peroxide (C)] An "organic peroxide" refers to an organic compound having one or more oxygen-oxygen bonds in one molecule, and is represented, for example, by the formula: RO-OR' (R and R' are organic groups having 1 to 20 carbon atoms). One or more types of organic peroxides (C) can be used.

[0042] Examples of the organic peroxide (C) include alkyl peroxy esters, peroxy carbonates, diacyl peroxides, peroxy ketals, dialkyl peroxides, and hydroperoxides.

[0043] The 10-hour half-life temperature of the organic peroxide (C) is, for example, 10°C or higher and 150°C or lower, and preferably 20°C or higher and 110°C or lower.

[0044] From the viewpoint of the 10-hour half-life temperature, the organic peroxide (C) preferably contains at least one selected from the group consisting of alkyl peroxy esters, peroxy carbonates, and diacyl peroxides. In this case, the polymerization reaction of the resin (A) during curing of the composition (X) can be appropriately carried out, and the mechanical properties of the resulting resin (Y) can be further improved.

[0045] Examples of alkyl peroxy esters include 3-hydroxy-1,1-dimethylbutyl peroxy neodecanoate, α-cumyl peroxy neodecanoate, 1,1,3,3-tetramethylbutyl peroxy neodecanoate, t-butyl peroxy neodecanoate, t-amyl peroxy neodecanoate, t-amyl peroxy benzoate, and t-hexyl peroxy-2-ethylhexanoate.

[0046] Examples of peroxycarbonates include t-butylperoxyisopropyl carbonate, t-butylperoxy-2-ethylhexyl carbonate, t-amylperoxyisopropyl carbonate, and di(sec-butyl)peroxydicarbonate.

[0047] Examples of diacyl peroxides include diisononanoyl peroxide, dilauroyl peroxide, and dibenzoyl peroxide.

[0048] The proportion of the organic peroxide (C) is preferably 0.5 parts by mass or more relative to 100 parts by mass of the resin (A). If this proportion is less than 0.5 parts by mass, the curing time of the composition (X) may be prolonged. This proportion is more preferably 0.8 parts by mass or more, and even more preferably 0.9 parts by mass or more. Furthermore, this proportion is preferably 3 parts by mass or less. If this proportion exceeds 3 parts by mass, defects such as cracks and unevenness may occur in the appearance of the cured product of the composition (X), and costs may also increase. This proportion is more preferably 2 parts by mass or less, even more preferably 1.2 parts by mass or less, and particularly preferably 1.1 parts by mass or less.

[0049] The proportion of the organic peroxide (C) relative to the composition (X) is, for example, 0.1% by mass or more, preferably 0.5% by mass or more, and more preferably 0.9% by mass or more. The proportion of the organic peroxide (C) relative to the composition (X) is, for example, 5% by mass or less, preferably 3% by mass or less, more preferably 2% by mass or less, and even more preferably 1.1% by mass or less.

[0050] [Additive (D)] The additive (D) is composed of at least one of a terpene phenol resin and a phosphate ester. That is, the composition (X) contains a terpene phenol resin, a phosphate ester, or both of them as the additive (D). One or more additives (D) can be used.

[0051] The term "terpene phenol resin" refers to a polymer or oligomer containing a terpene residue and a phenol residue, and is a concept that includes both a copolycondensate of terpenes and a phenol compound (terpene-phenol copolycondensate resin) and a phenol-modified homopolymer or copolymer of terpenes (phenol-modified terpene resin).

[0052] Examples of terpenes include α-pinene, β-pinene, limonene, terpinolene, etc. Examples of phenol compounds include phenol, bisphenols such as bisphenol A, cresol, xylenol, p-t-butylphenol, p-octylphenol, p-nonylphenol, and other alkylphenols.

[0053] Commercially available terpene phenol resins include, for example, YS Polystar U130, U115, T160, T145, T130, T115, S145, G150, N125, K125, and TH130 (all manufactured by Yasuhara Chemical Co., Ltd.).

[0054] The term "phosphate ester" refers to a concept that includes phosphate monoesters, phosphate diesters, phosphate triesters, and salts thereof, as well as substances having these esters or salts as partial structures, and examples thereof include those represented by the formula: O=P(-OR)a(-O － Q ＋ ) b (—OH) c (R is an organic group having 1 to 30 carbon atoms, Q ＋ is a monovalent cationic group such as a tetraalkylammonium group, a, b, and c are integers of 0 to 3, and a+b+c=3).

[0055] Examples of phosphate esters include phosphate triesters such as trimethyl phosphate, triethyl phosphate, tributyl phosphate, and tristearyl phosphate; phosphate diesters such as dibutyl phosphate and dioleyl phosphate; phosphate monoesters such as mono(2-ethylhexyl) phosphate; and phosphate ester salts such as tetrabutylammonium salt of dioleyl phosphate.

[0056] Commercially available phosphate esters include, for example, DISPERBYK-111, 142, 145, and BYK-W9010 (all manufactured by BYK Japan KK).

[0057] The proportion of additive (D) is preferably 0.5 parts by mass or more relative to 100 parts by mass of resin (A). If this proportion is less than 0.5 parts by mass, the effect of improving the mechanical properties of resin (Y) may be reduced. This proportion is more preferably 0.7 parts by mass or more, even more preferably 1.0 parts by mass or more, and particularly preferably 1.3 parts by mass or more. Furthermore, this proportion is preferably 3 parts by mass or less. If this proportion exceeds 3 parts by mass, defects such as color unevenness and streaks may occur in the appearance of the cured product of composition (X). This proportion is more preferably 2.5 parts by mass or less, even more preferably 2 parts by mass or less, and particularly preferably 1.7 parts by mass or less.

[0058] The proportion of additive (D) relative to composition (X) is, for example, 0.1 mass% or more, preferably 0.4 mass% or more, more preferably 0.8 mass% or more, and even more preferably 1.2 mass% or more. The proportion of additive (D) relative to composition (X) is, for example, 4 mass% or less, preferably 2.5 mass% or less, more preferably 2 mass% or less, and even more preferably 1.5 mass% or less.

[0059] [Other Components] Examples of other components include fillers, antifoaming agents, colorants, patterning agents, etc. One or more of the other components may be used.

[0060] One or more fillers can be selected and used depending on the location where the resin (Y) is used and the required quality. Examples of fillers include inorganic fillers such as silica, aluminum hydroxide, and calcium carbonate. When the composition (X) contains a filler, the proportion of the filler is preferably 100 parts by mass or more, and more preferably 200 parts by mass or more, per 100 parts by mass of the resin (A). This proportion is preferably 350 parts by mass or less, and more preferably 300 parts by mass or less.

[0061] When composition (X) contains components other than the filler, the proportion of the other components is preferably 5 parts by mass or less, more preferably 3 parts by mass or less, relative to 100 parts by mass of resin (A). The lower limit of this proportion is, for example, 0.1 parts by mass or more.

[0062] <Method for Producing Resin Composition> Composition (X) can be produced as follows. First, additive (D) is mixed with resin (A). When additive (D) is a solid terpene phenol resin, it is preferable to first dissolve additive (D) in resin (A). Next, liquid materials such as an antifoaming agent and a colorant are blended into the resulting mixture of resin (A) and additive (D), and then glycol lignin (B) is blended and mixed by stirring. Organic peroxide (C) is blended into the resulting mixture, and the mixture is mixed with a stirrer and degassed to obtain composition (X).

[0063] <Resin> Resin (Y) contains a cured product of the above-mentioned composition (X). In other words, resin (Y) is a mixture of a polymer of resin (A) contained in composition (X) and glycol lignin (B), and it is considered that resin (Y) has a structure in which glycol lignin (B) is present in a polymer of resin (A). Resin (Y) has improved mechanical properties. The mechanical properties of resin (Y) can be evaluated, for example, by bending strength.

[0064] The flexural strength of resin (Y) is preferably 50 MPa or more, more preferably 55 MPa or more, even more preferably 60 MPa or more, and particularly preferably 63 MPa or more. The higher the flexural strength of resin (Y), the better, but the upper limit is, for example, 80 MPa or less. The flexural strength of resin (Y) can be measured by a method in accordance with JIS-K7171.

[0065] <Method for Producing Resin> Resin (Y) can be produced as follows. First, composition (X) is injected into a mold having a desired inner surface shape to fill it. Next, the mold filled with composition (X) is heated to obtain resin (Y), which is a cured product of composition (X). The heating temperature is preferably 70°C or higher and 100°C or lower, and the heating time is preferably 30 minutes or higher and 60 minutes or lower.

[0066] <Water-related Product> The water-related product (Z) is a product made of the above-mentioned resin (Y). That is, the water-related product (Z) is formed of the resin (Y).

[0067] The plumbing product (Z) may be any product that can be wetted by liquid, and examples thereof include products used in kitchens, washrooms, toilets, baths, etc. Examples of the plumbing product (Z) include kitchen counters, sinks, range hoods, etc. in kitchens, washbasins, faucets, bowls, etc. in washrooms, toilet seats, toilet bowls, etc. in toilets, and bathtubs, bathroom doors, bathroom racks, shower heads, etc. in baths. The plumbing product (Z) may also be a product that can be wetted by liquid when used outdoors.

[0068] The plumbing product (Z) may be produced by curing the composition (X) using a formwork having an inner surface shape corresponding to the desired product shape, or by cutting the cured product of the composition (X) into the desired product shape.

[0069] The present disclosure will be described in more detail below using examples, but the present disclosure is not limited to only these examples.

[0070] [Examples 1 to 4 and Comparative Example 1] <Preparation of Resin Composition> First, the types and amounts of components (A) to (D) shown in Table 1 below were weighed out. Next, additive (D) was blended into resin (A) and mixed. In Examples 1 and 2, the solid terpene phenol resin used as additive (D) was first dissolved in resin (A) before use. Next, glycol lignin (B) was blended into this mixture of resin (A) and additive (D) and mixed by stirring. Next, organic peroxide (C) was blended, and the mixture was mixed with a stirrer ("L2814-S-1" manufactured by Chuo Rika Co., Ltd.) and degassed to obtain composition (X).

[0071] [Components] Resin (A): Vinyl ester resin: Bisphenol A vinyl ester resin ("Prominate H6600" manufactured by Japan Composite Co., Ltd.) Glycol lignin (B): Polyethylene glycol modified lignin ("SD4" manufactured by Lignomateria Co., Ltd.) Organic peroxide (C): t-Hexylperoxy-2-ethylhexanoate ("Perhexyl O" manufactured by NOF Corporation) Additive (D): Terpene phenol resin ("YS Polystar T130" manufactured by Yasuhara Chemical Co., Ltd.): Phosphate ester ("BYK-W9010" manufactured by BYK Japan Co., Ltd.)

[0072] <Production of Resin> Each of the compositions (X) prepared above was injected into a predetermined mold and filled. The mold filled with each composition (X) was heated at 90°C for 60 minutes using a heating and drying oven. In this way, a resin (Y) (length 200 mm, width 150 mm, thickness 8 mm) consisting of a cured product of composition (X) was obtained.

[0073] <Evaluation> [Flexural Strength] The resin (Y) produced above was cut to a predetermined size (160 mm length, 15 mm width, 8 mm thickness), and then a flexural test was carried out at room temperature in accordance with JIS-K7171 using a precision universal testing machine ("Autograph AG-X" manufactured by Shimadzu Corporation). The flexural strength (MPa) was measured seven times, and the arithmetic mean value was used as the measured value. The flexural strength was evaluated as A (good) when it was 55 MPa or more, and as B (poor) when it was less than 55 MPa.

[0074]

[0075] As is clear from the results in Table 1, the resin compositions of the Examples have improved mechanical properties such as bending strength of the resin obtained by curing compared to the resin compositions of the Comparative Examples.

[0076] (Summary) As is clear from the above embodiments, the present disclosure includes the following aspects: A resin composition (X) of a first aspect contains a resin (A) containing an ethylenically unsaturated group, glycol lignin (B), an organic peroxide (C), and an additive (D) consisting of at least one of a terpene phenol resin and a phosphoric acid ester.

[0077] According to the first aspect, the mechanical properties of the resin (Y) obtained by curing can be improved. Furthermore, by promoting the distribution of products using the resin (Y) made from a biomass material and having improved mechanical properties, it is possible to prevent environmental destruction.

[0078] In the resin composition (X) of the second embodiment, in the first embodiment, the glycol lignin (B) is in powder form.

[0079] According to the second aspect, even if a powdery glycol lignin (B) is used, the mechanical properties of the resin (Y) can be improved.

[0080] In the resin composition (X) of the third aspect, in the first or second aspect, the resin (A) containing an ethylenically unsaturated group contains at least one selected from the group consisting of a vinyl ester resin, an acrylic resin, and an unsaturated polyester resin.

[0081] According to the third aspect, by using these resins as the resin (A), the mechanical properties of the resin (Y) can be further improved.

[0082] In the resin composition (X) of the fourth aspect, in any one of the first to third aspects, the organic peroxide (C) includes at least one selected from the group consisting of alkyl peroxy esters, peroxy carbonates, and diacyl peroxides.

[0083] According to the fourth aspect, by using an organic peroxide (C) having an appropriate 10-hour half-life temperature, the mechanical properties of the resin (Y) can be further improved.

[0084] In the resin composition (X) of the fifth aspect, in any one of the first to fourth aspects, the proportion of glycol lignin (B) is 50 parts by mass or less per 100 parts by mass of the resin (A) containing an ethylenically unsaturated group.

[0085] According to the fifth aspect, the resin composition (X) can have an appropriate viscosity, and the handleability can be improved.

[0086] In the resin composition (X) of the sixth aspect, in any one of the first to fifth aspects, the proportion of the additive (D) is 0.5 parts by mass or more and 3 parts by mass or less per 100 parts by mass of the resin (A) containing an ethylenically unsaturated group.

[0087] According to the sixth aspect, the resin (Y) can improve mechanical properties and can suppress defects such as color unevenness and streaks in appearance.

[0088] In the seventh aspect of the resin composition (X), in any one of the first to sixth aspects, the proportion of the organic peroxide (C) is 0.5 parts by mass or more and 3 parts by mass or less per 100 parts by mass of the resin (A) containing an ethylenically unsaturated group.

[0089] According to the seventh aspect, the curing time of the resin composition (X) can be made appropriate, defects such as cracks and unevenness in the appearance of the resin (Y) can be suppressed, and an increase in costs can be suppressed.

[0090] The resin (Y) of the eighth aspect includes a cured product of a resin composition (X) containing a resin (A) having an ethylenically unsaturated group, glycol lignin (B), an organic peroxide (C), and an additive (D) consisting of at least one of a terpene phenol resin and a phosphoric acid ester.

[0091] According to the eighth aspect, the resin (Y) can improve mechanical properties.

[0092] The plumbing product (Z) of the ninth embodiment is composed of the resin (Y) of the eighth embodiment.

[0093] According to the ninth aspect, the resin (Y) can be suitably used as a water-related member, product, or the like that requires high durability.

Claims

1. A resin composition comprising a resin containing an ethylenically unsaturated group, glycol lignin, an organic peroxide, and an additive consisting of at least one of a terpene phenol resin and a phosphoric acid ester.

2. The resin composition according to claim 1, wherein the glycol lignin is in powder form.

3. The resin composition according to claim 1, wherein the resin containing an ethylenically unsaturated group comprises at least one resin selected from the group consisting of vinyl ester resins, acrylic resins and unsaturated polyester resins.

4. The resin composition according to claim 1, wherein the organic peroxide comprises at least one selected from the group consisting of alkyl peroxy esters, peroxy carbonates, and diacyl peroxides.

5. The resin composition according to claim 1, wherein the proportion of the glycol lignin is 50 parts by mass or less per 100 parts by mass of the resin containing an ethylenically unsaturated group.

6. The resin composition according to claim 1, wherein the proportion of the additive is 0.5 parts by mass or more and 3 parts by mass or less per 100 parts by mass of the resin containing an ethylenically unsaturated group.

7. The resin composition according to claim 1, wherein the ratio of said organic peroxide is 0.5 parts by mass or more and 3 parts by mass or less per 100 parts by mass of said resin containing an ethylenically unsaturated group.

8. A resin comprising a cured product of a resin composition containing a resin having an ethylenically unsaturated group, glycol lignin, an organic peroxide, and an additive consisting of at least one of a terpene phenol resin and a phosphoric acid ester.

9. A plumbing product made from the resin described in claim 8.

Images