JP2015105318A - Block polymer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a block polymer that provides plasticizing effect simultaneously achieving moldability of a resin composition and heat resistance of a molding to a high degree.SOLUTION: There is provided a block polymer comprising a polyester moiety and a vinyl polymer moiety. The polyester moiety is obtained by condensing a monomer (a) selected from the group consisting of a specific monomer having carbon atoms of 2 or more and 13 or less and a monomer (b) selected from the group consisting of a specific monomer having carbon atoms of 12 or more and 23 or less. The polyester moiety has a content of a partial structure derived from the monomer (b), which is calculated by the expression {monomer (b) [mole]/[ monomer (a) [mole]+ monomer (b) [mole]]}×100, of 1.0 mole% or more and 30.0 mole% or less.

Description

  The present invention relates to a block polymer, and more particularly to a block polymer having a polyester moiety and a vinyl polymer moiety used for plasticizing a resin composition.

Plasticizers have the property of imparting flexibility and facilitating molding by being added to various resin compositions, and are used in resin compositions in all fields. As a general plasticizer, a low molecular weight ester compound such as dioctyl phthalate (DOP) is widely known. However, there are problems such as stickiness of the surface of the molded article, flexibility, and deterioration with time. On the other hand, the plasticizer which consists of an acryl-type polymer which improved the said problem and a weather resistance is proposed (refer patent document 1). However, from the viewpoint of achieving both moldability and heat resistance of the resin composition, even when the plasticizer is used, it cannot be said that the performance is still sufficient, and there remains room for improvement.
In contrast, in recent years, the use of crystalline resins as plasticizers has been studied. The crystalline resin exhibits high viscoelasticity as a solid in a temperature range lower than the melting point, and viscoelasticity rapidly decreases when the melting point is exceeded. Therefore, by using this property, both heat resistance and moldability can be expected.
However, in practice, there is a problem that the crystallinity of the crystalline resin is lowered in the molded product, and a part of the crystalline resin that cannot be crystallized plasticizes the molded product, resulting in deterioration of heat resistance.
On the other hand, the invention which suppresses the crystallinity fall of crystalline resin and improves heat resistance by adding a crystal nucleating agent like ethylenebisstearic acid amide as a 3rd component to the resin composition containing crystalline resin Has been proposed (see Patent Document 2). However, when a crystal nucleating agent is added as the third component, the effect of promoting crystallization may not be sufficiently obtained due to the dispersion state (uneven distribution) of the crystal nucleating agent in the resin composition, resulting in poor heat resistance. It was.

International Publication No. 2001/083619 JP 2006-113473 A

  The problem to be solved by the present invention is to provide a block polymer that provides a plastic effect that is compatible with the moldability of the resin composition and the heat resistance of the molded article at a high level.

A block polymer having a polyester moiety and a vinyl polymer moiety,
The polyester moiety is a monomer (a) selected from the group consisting of the following monomer group A;
Obtained by condensation polymerization of a monomer (b) selected from the group consisting of the following monomer group B:
The polyester part is a block polymer characterized in that the content of the partial structure derived from the monomer (b) calculated from the following formula is 1.0 mol% or more and 30.0 mol% or less.
{Monomer (b) [mol] / [monomer (a) [mol] + monomer (b) [mol]]} × 100
Monomer group A: α, ω-linear aliphatic diol having 2 to 11 carbon atoms, α, ω-linear aliphatic dicarboxylic acid having 2 to 13 carbon atoms, and α, ω having 2 to 12 carbon atoms -Linear aliphatic monohydroxy monocarboxylic acid, compounds in which the carboxyl groups of these compounds are acid anhydrides, compounds having alkyl esters, and compounds having lactonization Monomer group B: α, ω having 14 to 24 carbon atoms A linear aliphatic dicarboxylic acid, α, ω-linear aliphatic diol having 12 to 22 carbon atoms, α, ω-linear aliphatic monohydroxymonocarboxylic acid having 13 to 23 carbon atoms, 13 or more carbon atoms The linear aliphatic primary monocarboxylic acid having 23 or less, the linear aliphatic primary monoalcohol having 12 to 22 carbon atoms, and the carboxyl groups of these compounds are acid anhydrides. Compound, alkyl esterified compound, and lactonized compound

  According to the present invention, it is possible to provide a block polymer having high plasticization efficiency, excellent low-temperature moldability, and excellent molded product heat resistance.

The NMR chart of the block polymer 1 is shown.

Below, the block polymer of this invention is demonstrated in more detail.
As a result of intensive studies to solve the problems of the prior art described above, the inventors have achieved a high level of moldability of the resin composition and heat resistance of the molded article by using a specific block polymer as a plasticizer. The inventors have found that this is possible and have reached the present invention.
The present invention is a block polymer having a polyester moiety and a vinyl polymer moiety,
The polyester moiety is the following monomer group A
Monomer group A: α, ω-linear aliphatic diol having 2 to 11 carbon atoms, α, ω-linear aliphatic dicarboxylic acid having 2 to 13 carbon atoms, and α, ω having 2 to 12 carbon atoms A monomer (a) selected from the group consisting of linear aliphatic monohydroxymonocarboxylic acids, compounds in which the carboxyl groups of these compounds are acid anhydrides, alkylesterified compounds, and lactonized compounds; Monomer group B
Monomer group B: α, ω-linear aliphatic dicarboxylic acid having 14 to 24 carbon atoms, α, ω-linear aliphatic diol having 12 to 22 carbon atoms, α, ω- having 13 to 23 carbon atoms Straight chain aliphatic monohydroxymonocarboxylic acid, straight chain aliphatic primary monocarboxylic acid having 13 to 23 carbon atoms, straight chain aliphatic primary monoalcohol having 12 to 22 carbon atoms, and carboxyls of these compounds The polyester moiety is obtained by condensation polymerization of a monomer (b) selected from the group consisting of a compound in which an acid anhydride is formed, an alkyl esterified compound, and a lactonized compound, and the polyester moiety is represented by the following formula {monomer ( b) [mol] / [monomer (a) [mol] + monomer (b) [mol]]} × 100
The content of the partial structure derived from the monomer (b) calculated from the formula (1) is 1.0 mol% or more and 30.0 mol% or less.

The present inventors consider the mechanism by which the block polymer defined in the present invention exhibits the effect as follows.
A block polymer that satisfies the above requirements has a crystalline portion that is compatible with the resin at a temperature equal to or higher than the melting point to lower the softening temperature of the resin composition, and that the block polymer takes a microdomain structure in the resin composition. It has a vinyl polymer portion that performs a dispersing function, and each block portion synergistically exhibits an effect to function as a plasticizer having high plasticization efficiency and excellent low-temperature moldability.
Furthermore, since the monomer (b) unit is incorporated in the polyester site, the monomer (b) unit having a large number of carbon atoms functions as a nucleation site, and the crystallinity of the block polymer is greatly improved. Due to this effect, the softening point of the resin composition does not decrease at room temperature, and high heat resistance is obtained. In addition, by being a block polymer having a vinyl polymer portion, bleeding out to the surface of the resin composition is suppressed.

The polyester portion has the following formula {monomer (b) [mol] / [monomer (a) [mol] + monomer (b) [mol]]} × 100
The content of the partial structure derived from the monomer (b) calculated from the formula (1) is 1.0 mol% or more and 30.0 mol% or less.
In the polyester part, the content of the monomer (b) with respect to the total amount of the monomer (a) and the monomer (b) is 1.0 mol% or more, whereby a block polymer in which the monomer (b) unit is uniformly incorporated Therefore, almost all the block polymers in the molded product can enjoy the effect of the monomer (b) unit, and the heat resistance of the molded product is greatly improved.
On the other hand, in the polyester part, the content of the monomer (b) with respect to the total amount of the monomer (a) and the monomer (b) is 30 mol% or less, so that the plastic effect of the block polymer is not impaired at the time of melting, Low temperature formability is greatly improved.
The definition of block polymer includes a polymer composed of a plurality of linearly linked blocks (a glossary of basic terms in polymer science by the Polymer Society International Pure Chemical Union) The present invention follows that definition.

Specific examples of the α, ω-linear aliphatic diol having 2 to 11 carbon atoms in the monomer group A include ethylene glycol, propylene glycol, 1,4-butanediol, 1,5-pentanediol, 1, Examples include 6-hexanediol, 1,7-heptanediol, 1,8-octanediol, 1,9-nonanediol, 1,10-decanediol, and 1,11-undecanediol. These may be used as a mixture.
Examples of the α, ω-linear aliphatic dicarboxylic acid having 2 to 13 carbon atoms in the monomer group A include succinic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, Examples include 1,9-nonanedicarboxylic acid, 1,10-decanedicarboxylic acid, 1,11-undecanedicarboxylic acid, and the like. These may be used as a mixture. These may be used in the reaction in the form of a compound in which the carboxyl group is acid anhydrided or an alkyl esterified compound.
Examples of the α, ω-linear aliphatic monohydroxymonocarboxylic acid having 2 to 12 carbon atoms in the monomer group A include hydroxyacetic acid, 3-hydroxypropionic acid, 4-hydroxybutanoic acid, 5-hydroxypentanoic acid, 6- Examples include hydroxyhexanoic acid, 7-hydroxyheptanoic acid, 8-hydroxyoctanoic acid, 9-hydroxynonanoic acid, 10-hydroxydecanoic acid, 11-hydroxyundecanoic acid, and 12-hydroxydodecanoic acid. These may be used as a mixture. These may be used in the form of a compound in which the carboxyl group is lactonized or an alkylesterified compound in the reaction.

Examples of the α, ω-linear aliphatic diol having 12 to 22 carbon atoms in the monomer group B include 1,12-dodecanediol, 1,13-tridecanediol, 1,14-tetradecanediol, and 1,15-pentadecane. Diol, 1,16-hexadecanediol, 1,17-heptadecanediol, 1,18-octadecanediol, 1,19-nonadecanediol, 1,20-icosanediol, 1,21-henicosanediol, , 22-docosanediol and the like. These may be used as a mixture.
Examples of the α, ω-linear aliphatic dicarboxylic acid having 14 to 24 carbon atoms in the monomer group B include 1,12-dodecanedicarboxylic acid, 1,13-tridecanedicarboxylic acid, 1,14-tetradecanedicarboxylic acid, 1 , 15-pentadecanedicarboxylic acid, 1,16-hexadecanedicarboxylic acid, 1,17-heptadecanedicarboxylic acid, 1,18-octadecanedicarboxylic acid, 1,19-nonadecanedicarboxylic acid, 1,20-icosanedicarboxylic acid, 1,2-henicosane dicarboxylic acid, 1,2-docosane dicarboxylic acid and the like can be mentioned. These may be used as a mixture. These may be used in the reaction in the form of a compound in which the carboxyl group is acid anhydrided or an alkyl esterified compound.

Examples of the α, ω-linear aliphatic monohydroxymonocarboxylic acid having 13 to 23 carbon atoms in the monomer group B include 13-hydroxytridecanoic acid, 14-hydroxytetradecanoic acid, 15-hydroxypentadecanoic acid, and 16-hydroxyhexadecane. Acid, 17-hydroxyheptadecanoic acid, 18-hydroxyoctadecanoic acid, 19-hydroxynonadecanoic acid, 20-hydroxyicosanoic acid, 21-hydroxyhenicosanoic acid, 22-hydroxydocosanoic acid, 23-hydroxytricosanoic acid Etc. These may be used as a mixture. These may be used in the form of a compound in which the carboxyl group is lactonized or an alkylesterified compound in the reaction.
Examples of the linear aliphatic primary monocarboxylic acid having 13 to 23 carbon atoms in the monomer group B include n-tridecanoic acid, n-tetradecanoic acid, n-pentadecanoic acid, n-hexadecanoic acid, n-heptadecanoic acid, n- Examples include octadecanoic acid, n-nonadecanoic acid, n-icosanoic acid, n-henicosanoic acid, n-docosanoic acid, and n-tricosanoic acid. These may be used as a mixture. These may be used in the reaction in the form of a compound in which the carboxyl group is acid anhydrided or an alkyl esterified compound.
Examples of the linear aliphatic primary monoalcohol having 12 to 22 carbon atoms in the monomer group B include n-dodecanol, n-tridecanol, n-tetradecanol, n-pentadecanol, n-hexadecanol, n- Heptadecanol, n-octadecanol, n-nonadecanol, n-icosanol, n-henicosanol, n-docosanol and the like can be mentioned. These may be used as a mixture.

The polyester portion in the block polymer may be further reacted with a monomer in addition to the monomer selected from the monomer group A or the monomer group B as long as the object of the present invention is not impaired. For example, aromatic dicarboxylic acid, branched aliphatic dicarboxylic acid, cycloaliphatic dicarboxylic acid, aromatic diol, branched aliphatic diol, cycloaliphatic diol and the like can be mentioned.
Specifically, examples of the aromatic dicarboxylic acid include phthalic acid, isophthalic acid, and terephthalic acid. Examples of the branched aliphatic dicarboxylic acid include dimethylmalonic acid, isopropylmalonic acid, diethylmalonic acid, 1-methylbutylmalonic acid, dipropylmalonic acid, diisobutylmalonic acid and the like.
Examples of the cycloaliphatic dicarboxylic acid include 1,4-cyclohexanedicarboxylic acid and 1,3-adamantanedicarboxylic acid.
Examples of the aromatic diol include a polyoxypropylene adduct of 2,2-bis (4-hydroxyphenyl) propane and a polyoxyethylene adduct of 2,2-bis (4-hydroxyphenyl) propane.

Examples of the branched aliphatic diol include 3-methyl-1,3-butanediol, neopentyl glycol, pinacol, 2-ethyl-1,3-hexanediol, 2,2,4-trimethyl-1,3-pentanediol, 3,5-dimethyl-2,4-docosanediol, 1,4-cyclohexanediol and the like can be mentioned.
Examples of the cycloaliphatic diol include 1,4-cyclohexanediol, 1,4-cyclohexanedimethanol, 2,2-bis (4-hydroxycyclohexyl) propane, and the like.
As the monomer selected from the monomer group B, α, ω-linear aliphatic diol, α, ω-linear aliphatic dicarboxylic acid, or α, ω- that can introduce a plurality of units in one molecular chain of the polymer. Straight chain aliphatic monohydroxymonocarboxylic acid is preferable in that crystallinity is further improved.
The content of the partial structure derived from the monomer (b) is more preferably in the range of 4.0 mol% to 20.0 mol%, and still more preferably 8.0 mol% to 15.0 mol%. Range.

The weight average molecular weight (Mw) of the vinyl polymer portion in the block polymer is preferably 3000 or more and 30000 or less. More preferably, it is 3500 or more and 25000 or less. When the Mw of the vinyl polymer portion is within the above range, both low-temperature moldability and heat resistance can be achieved at a higher level. If the Mw at the vinyl polymer site is too small, the high dispersibility of the block polymer tends to be lost, and the low temperature moldability may be poor. On the contrary, when the Mw of the vinyl polymer portion is too large, the sharp melt property due to the polyester portion tends to be impaired, and the effect of low temperature moldability may be difficult to obtain.
The weight average molecular weight (Mw) of the vinyl polymer moiety can be controlled by the reaction conditions (initiator amount, initiator addition timing, reaction temperature, etc.) of the polymerization reaction that produces the vinyl polymer moiety.

The vinyl polymer moiety is preferably generated from one or more polymerizable monomers selected from the following group. Examples of the polymerizable monomer include styrene, α-methylstyrene, β-methylstyrene, o-methylstyrene, m-methylstyrene, p-methylstyrene, 2,4-dimethylstyrene, and pn-butyl. Styrene, p-tert-butyl styrene, pn-hexyl styrene, pn-octyl styrene, pn-nonyl styrene, pn-decyl styrene, pn-dodecyl styrene, p-methoxy styrene, and , Styrene polymerizable monomers such as p-phenylstyrene;
Methyl acrylate, ethyl acrylate, n-propyl acrylate, iso-propyl acrylate, n-butyl acrylate, iso-butyl acrylate, tert-butyl acrylate, n-amyl acrylate, n-hexyl acrylate, 2-ethylhexyl acrylate, n-octyl acrylate Acrylic polymerizable monomers such as N, nonyl acrylate, cyclohexyl acrylate, benzyl acrylate, dimethyl phosphate ethyl acrylate, diethyl phosphate ethyl acrylate, dibutyl phosphate ethyl acrylate, and 2-benzoyloxyethyl acrylate;
Methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, iso-propyl methacrylate, n-butyl methacrylate, iso-butyl methacrylate, tert-butyl methacrylate, n-amyl methacrylate, n-hexyl methacrylate, 2-ethylhexyl methacrylate, n-octyl methacrylate , N-nonyl methacrylate, diethyl phosphate ethyl methacrylate, and methacrylic polymerizable monomers such as dibutyl phosphate ethyl methacrylate; from the viewpoint of easy availability of raw materials and block polymer production Styrene is preferred.

The melting point (Tm) of the block polymer is preferably 25 ° C. or higher and 85 ° C. or lower. More preferably, it is 50 degreeC or more and 80 degrees C or less. When the Tm of the block polymer is in the above range, both low temperature moldability and high heat resistance are achieved.
The melting point of the block polymer can be controlled by the monomer that forms the polyester moiety or the ratio of the polyester moiety to the vinyl polymer moiety.

The mass-based ratio (C / A ratio) of the polyester moiety and vinyl polymer moiety in the block polymer is preferably in the range of 25:75 to 70:30. More preferably, 40
: 60 to 60:40. Sufficient low-temperature moldability is exhibited when the ratio of the polyester portion to the vinyl polymer portion is within the above range. When the vinyl polymer part ratio is too large, the sharp melt property of the polyester part is impaired and low temperature formability tends to be difficult to obtain. On the other hand, even if the polyester site ratio is too large, the dispersibility is impaired and low temperature formability tends to be difficult to obtain.

The block polymer preferably has a weight average molecular weight (Mw) of 6000 or more and 60000 or less. More preferably, it is 10,000 or more and 50000 or less, More preferably, it is 15000 or more and 40000 or less. When the Mw of the block polymer is in the above range, both low-temperature moldability and bleed resistance are achieved. If the Mw of the block polymer is too small, there is a risk of bleeding in the molded product. On the other hand, when the Mw of the block polymer is too large, the melt viscosity of the block polymer itself is increased, so that the plastic efficiency is lowered and the low temperature moldability may be impaired.
The weight average molecular weight (Mw) of the block polymer can be controlled by Mw at the vinyl polymer site and Mw at the polyester site. The Mw of the polyester moiety can be controlled by the reaction conditions (the initiator amount, the catalyst amount, the reaction temperature, etc.) of the condensation polymerization reaction that produces the polyester moiety.

  There is no restriction | limiting in particular in the manufacturing method of this block polymer. A method of extending a vinyl polymer part by atom transfer radical polymerization after preparing a polyester part first, a method of extending a polyester part after preparing a vinyl polymer part that has been end-treated first, a polyester part, a vinyl polymer part first A well-known block polymer production method such as a method in which both are prepared after being prepared separately can be used.

Examples of the resin used when the block polymer of the present invention is used as a plasticizer include styrene acrylic resin, polyester resin, polyolefin resin, polyamide resin, polyacetal resin and the like. These resins may be used alone or in combination of two or more as necessary.
A particularly preferable resin is a styrene acrylic resin. As the polymerizable monomer for producing the styrene acrylic resin, a vinyl polymerizable monomer capable of radical polymerization can be used. As the vinyl polymerizable monomer, a monofunctional polymerizable monomer or a polyfunctional polymerizable monomer can be used.
Monofunctional polymerizable monomers alone or in combination of two or more, or a combination of monofunctional polymerizable monomers and polyfunctional polymerizable monomers, or polyfunctional polymerizable Monomers can be used alone or in combination of two or more.

Examples of the monofunctional polymerizable monomer include styrene, α-methylstyrene, β-methylstyrene, o-methylstyrene, m-methylstyrene, p-methylstyrene, 2,4-dimethylstyrene, and pn-. Butyl styrene, p-tert-butyl styrene, pn-hexyl styrene, pn-octyl styrene, pn-nonyl styrene, pn-decyl styrene, pn-dodecyl styrene, p-methoxy styrene, And styrene derivatives such as p-phenylstyrene;
Methyl acrylate, ethyl acrylate, n-propyl acrylate, iso-propyl acrylate, n-butyl acrylate, iso-butyl acrylate, tert-butyl acrylate, n-amyl acrylate, n-hexyl acrylate, 2-ethylhexyl acrylate, n-octyl acrylate Acrylic polymerizable monomers such as N, nonyl acrylate, cyclohexyl acrylate, benzyl acrylate, dimethyl phosphate ethyl acrylate, diethyl phosphate ethyl acrylate, dibutyl phosphate ethyl acrylate, and 2-benzoyloxyethyl acrylate;
Methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, iso-propyl methacrylate, n-butyl methacrylate, iso-butyl methacrylate, tert-butyl methacrylate, n-amyl methacrylate, n-hexyl methacrylate, 2-ethylhexyl methacrylate, n-octyl methacrylate Methacrylic polymerizable monomers such as n-nonyl methacrylate, diethyl phosphate ethyl methacrylate, and dibutyl phosphate ethyl methacrylate.

As polyfunctional polymerizable monomers, diethylene glycol diacrylate, triethylene glycol diacrylate, tetraethylene glycol diacrylate, polyethylene glycol diacrylate, 1,6-hexanediol diacrylate, neopentyl glycol diacrylate, tripropylene glycol Diacrylate, polypropylene glycol diacrylate, 2,2'-bis (4- (acryloxydiethoxy) phenyl) propane, trimethylolpropane triacrylate, tetramethylolmethane tetraacrylate, ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene Glycol dimethacrylate, tetraethylene glycol dimethacrylate, polyethylene glycol di Methacrylate, 1,3-butylene glycol dimethacrylate, 1,6-hexanediol dimethacrylate, neopentyl glycol dimethacrylate, polypropylene glycol dimethacrylate, 2,2′-bis (4- (methacryloxydiethoxy) phenyl) propane, Examples include 2,2'-bis (4- (methacryloxypolyethoxy) phenyl) propane, trimethylolpropane trimethacrylate, tetramethylolmethane tetramethacrylate, divinylbenzene, divinylnaphthalene, and divinyl ether.
It is preferable that the addition amount of a block polymer is the range of 5.0 mass parts or more and 50.0 mass parts or less in the total 100.0 mass parts of resin and block polymer. More preferably, they are 15.0 mass parts or more and 40.0 mass parts or less. By using in the said range, there is little bleed out of the block polymer from a resin composition, and the resin composition excellent in low temperature formation property and heat resistance is obtained.

The method of blending the block polymer with the resin is not particularly limited, but usually, a method of mixing with a blender, a mixer or the like, a method of melt-kneading using an extruder, a Banbury mixer, or the like can be mentioned. Further, a block polymer may be mixed from the resin production stage.
The resin composition according to the present invention includes, in addition to the block polymer presented in the present invention, a lubricant, an antistatic agent, an antifogging agent, an ultraviolet absorber, within the range not impairing the object of the present invention, depending on the application. Other additives such as heat stabilizers, antioxidants, anti-coloring agents, fillers, pigments, dyes, dispersants, flame retardants may be added. Moreover, you may use together plasticizers other than the block polymer shown by this invention.

Hereinafter, the measurement method of various physical properties according to the present invention will be described.
<Measurement method of molecular weight>
The weight average molecular weight (Mw) and number average molecular weight (Mn) of the block polymer are measured by gel permeation chromatography (GPC) as follows.
First, the block polymer is dissolved in tetrahydrofuran (THF) at room temperature. The obtained solution is filtered through a solvent-resistant membrane filter “Maescho Disc” (manufactured by Tosoh Corporation) having a pore diameter of 0.2 μm to obtain a sample solution. The sample solution is adjusted so that the concentration of the component soluble in THF is 0.8% by mass. Using this sample solution, measurement is performed under the following conditions.
Equipment: High-speed GPC equipment “HLC-8220GPC” [manufactured by Tosoh Corporation]
Column: LF-604 double eluent: THF
Flow rate: 0.6 ml / min
Oven temperature: 40 ° C
Sample injection amount: 0.020 ml
In calculating the molecular weight of the sample, standard polystyrene resin (for example, trade name “TSK Standard Polystyrene F-850, F-450, F-288, F-128, F-80, F-40, F-20, F— 10, F-4, F-2, F-1, A-5000, A-2500, A-1000, A-500 ", manufactured by Tosoh Corporation), and a molecular weight calibration curve is used.

In addition, the measurement of the molecular weight of the vinyl polymer part of the block polymer is carried out by hydrolyzing the polyester part of the block polymer.
Specifically, 5 ml of dioxane and 1 ml of a 10 wt% potassium hydroxide aqueous solution are added to 30 mg of the block polymer, and the polyester portion is hydrolyzed by shaking at a temperature of 70 ° C. for 6 hours. Thereafter, the solution is dried to prepare a sample for measuring the molecular weight of the vinyl polymer site. Subsequent operations are performed in the same manner as the block polymer.

<Measurement Method of Mass-Based Ratio (C / A Ratio) of Polyester Part and Vinyl Polymer Part of Block Polymer and Content of Partial Structure Derived from Monomer (b) in Block Polymer>
Measurements of the ratio of weight of the polyester moiety and a vinyl polymer moiety of the block polymer, and measuring the content of the partial structure derived from the monomer (b) of the block polymer is nuclear magnetic resonance spectroscopy ^{(1 H-NMR)} [ 400 MHz, CDCl ₃ , room temperature (25 ° C.)].
Measuring apparatus: FT NMR apparatus JNM-EX400 (manufactured by JEOL Ltd.)
Measurement frequency: 400MHz
Pulse condition: 5.0μs
Frequency range: 10500Hz
Accumulation count: 64 times From the integral value of the spectrum obtained, the mass-based ratio (C / A ratio) of the polyester moiety and vinyl polymer moiety, and the content of the partial structure derived from the monomer (b) in the block polymer Calculated.

<Measuring method of melting point>
The melting point (Tm) of the block polymer is measured in accordance with ASTM D3418-82 using a differential scanning calorimeter “Q1000” (manufactured by TA Instruments).
The temperature correction of the device detection unit uses the melting points of indium and zinc, and the correction of heat uses the heat of fusion of indium.
Specifically, 5 mg of the block polymer is precisely weighed, placed in an aluminum pan, and an empty aluminum pan is used as a reference. Measurement is performed at ° C / min. In the measurement, the temperature is once raised to 200 ° C., subsequently lowered to 30 ° C., and then the temperature is raised again. The maximum endothermic peak of the DSC curve in the temperature range of 30 to 200 ° C. in the second temperature raising process is defined as the melting point (Tm) in the DSC measurement of the block polymer of the present invention.

  Hereinafter, the present invention will be described more specifically with reference to examples. The present invention is not limited by the following examples. In addition, all the parts and% of an Example and a comparative example are mass references | standards unless there is particular notice.

<Manufacture of block polymer 1>
In a reaction vessel equipped with a stirrer, a thermometer, a nitrogen introduction tube, a dehydration tube, and a decompression device, 100.0 parts by mass of 1,10-decanedicarboxylic acid as a monomer selected from monomer group A, 1,6- Add 44.0 parts by mass of hexanediol, 17.2 parts by mass of 1,12-dodecanediol as a monomer selected from monomer group B, 0.7 parts by mass of titanium (IV) isopropoxide as an esterification catalyst, and add nitrogen. The reaction was carried out at 160 ° C. for 5 hours in an atmosphere. Then, it was made to react at 180 degreeC for 4 hours, and also it was made to react until it became a desired molecular weight at 180 degreeC and 1 hPa, and polyester (1) was obtained. The weight average molecular weight (Mw) of the polyester (1) was 19000.
Then, after adding 100.0 parts by mass of polyester (1) and 40.0 parts by mass of dehydrated chloroform to a reaction vessel equipped with a stirrer, a thermometer, and a nitrogen introduction tube,
While adding 18.0 parts by mass of triethylamine and cooling with ice, 34.0 parts by mass of 2-bromoisobutyryl bromide was gradually added. Thereafter, the mixture was stirred at room temperature (25 ° C.) for a whole day and night.
After reprecipitation with 800.0 parts by mass of methanol, filtration and drying were performed to obtain polyester (2).
Subsequently, 100.0 parts by mass of the polyester (2) obtained above in a reaction vessel equipped with a stirrer, a thermometer, and a nitrogen introduction tube, 300.0 parts by mass of styrene as a monomer for producing a vinyl polymer site, an odor A polymerization reaction was carried out at a temperature of 100 ° C. while adding 4.0 parts by mass of copper (I) and 9.5 parts by mass of pentamethyldiethylenetriamine and stirring them. When the desired molecular weight was reached, the reaction was stopped and reprecipitation was performed with 250.0 parts by mass of methanol, followed by filtration and drying to obtain a block polymer 1 having a polyester moiety and a vinyl polymer moiety. Table 3 shows the physical properties of the obtained block polymer 1. An NMR chart of the block polymer 1 is shown in FIG.

<Production of block polymers 2, 3, 4, 6, 7, 9, 10, 12, 14, 16, 17, 19, 21, 26, 27, 32, 36, 40 and 41>
The block polymers 2, 3, 4, 6, 7, 9, 10, 12, 14, 16, 17, 19, 21 are the same as the production method of the block polymer 1 except that the raw materials are changed as shown in Table 1. 26, 27, 32, 36, 40 and 41 were obtained. Table 3 shows the physical properties of the obtained block polymer.

<Production of block polymers 30 and 37>
The block polymer 30 was prepared in the same manner as in the production method of the block polymer 1 except that the raw material shown in Table 1 was changed and the amount of titanium (IV) isopropoxide as an esterification catalyst was changed to 1.4 parts by mass. And 37 were obtained. Table 3 shows the physical properties of the obtained block polymers 30 and 37.

<Manufacture of block polymer 5>
In a reaction vessel equipped with a stirrer, a thermometer, a nitrogen introduction tube, and a decompression device, 50.0 parts by mass of xylene was refluxed at 140 ° C. in a nitrogen atmosphere. What mixed styrene 100.0 mass part and 2,2'- azobis (methyl isobutyrate) 7.5 mass part there was dripped over 3 hours, and also it was made to react for 3 hours after completion | finish of dripping. Thereafter, xylene and residual styrene were distilled off at 160 ° C. and 1 hPa to obtain a vinyl polymer (1).
Subsequently, 100.0 parts by mass of the vinyl polymer (1) obtained above in a reaction vessel equipped with a stirrer, a thermometer, a nitrogen introduction tube, a dehydration tube, and a decompression device, 50.0 parts of xylene as an organic solvent, 58.2 parts by mass of sebacic acid as a monomer selected from the monomer group A, 45.0 parts by mass of 1,10-decanediol, 15.2 parts by mass of 15-pentadecanolactone as a monomer selected from the monomer group B, As an esterification catalyst, 0.7 part by mass of titanium (IV) isopropoxide was added and reacted at 160 ° C. for 5 hours in a nitrogen atmosphere. Then, it was made to react at 180 degreeC for 4 hours, and also it was made to react until it became a desired molecular weight at 180 degreeC and 1 hPa, and the block polymer 5 was obtained.

<Manufacture of block polymers 8, 11, 13, 15, 18, 20, 22, 25, 28, 29, 31, 33, 34, 35, 38 and 39>
The block polymers 8, 11, 13, 15, 18, 20, 22, 25, 28, 29, 31, 33, 34 are the same as the production method of the block polymer 5 except that the raw materials are changed as shown in Table 2. 35, 38 and 39 were obtained. Table 3 shows the physical properties of the obtained block polymer.

<Manufacture of polymer plasticizer A>
In a reaction vessel equipped with a stirrer, a thermometer and a pressure controller, 70.0 parts by mass of n-butyl acrylate, 30.0 parts by mass of methyl acrylate, 20.0 parts of isopropyl alcohol, 0.5 g of ditertiary butyl peroxide The reaction was carried out at 2.5 MPa and 230 ° C. for 15 minutes. Thereafter, the solvent was distilled off at 230 ° C. under reduced pressure to obtain a liquid polymer plasticizer A. The weight average molecular weight (Mw) of the polymer plasticizer A was 2600.

<Production of polymer plasticizer B>
In a reaction vessel equipped with a stirrer, a thermometer, a nitrogen introduction tube, a dehydration tube, and a decompression device, 100.0 parts by mass of sebacic acid, 73.5 parts by mass of 1,10-decanediol, and titanium ( IV) 0.7 parts by mass of isopropoxide was added, and 5 at 160 ° C. under a nitrogen atmosphere.
Reacted for hours. Then, it was made to react at 180 degreeC for 4 hours, and also it was made to react until it became a desired molecular weight at 180 degreeC and 1 hPa, and the polymer plasticizer B was obtained. The weight average molecular weight (Mw) of the polymer plasticizer B was 18000.

<Manufacture of resin composition 1>
The following materials were sufficiently premixed with a Henschel mixer (Mitsui Miike Chemical Co., Ltd.), then melt-kneaded with a twin-screw extruder, cooled, and then coarsened to a particle size of 1 to 2 mm using a hammer mill. The resin composition 1 was obtained by pulverization.
Styrene-n-butyl acrylate copolymer resin (Mw = 30,000, Tg = 60 ° C.)
65.0 parts by mass Block polymer 1 35.0 parts by mass

<Production of Resin Compositions 2-47>
As shown in Table 4, resin compositions 2 to 47 were obtained by the same production method as that for the resin composition 1 except that the material was changed.

<Production of Resin Composition 48>
The following materials were sufficiently premixed with a Henschel mixer (Mitsui Miike Chemical Co., Ltd.), then melt-kneaded with a twin-screw extruder, cooled, and then coarsened to a particle size of 1 to 2 mm using a hammer mill. The resin composition 48 was obtained by pulverization.
Styrene-n-butyl acrylate copolymer resin (Mw = 30,000, Tg = 60 ° C.)
65.0 parts by mass Polymer Plasticizer B 35.0 parts by mass Ethylene bis stearamide 3.0 parts by mass

[Low temperature formability]
Optical microscope (KEYEN) equipped with a hot stage (Linkam TH-600PM)
CE VH-Z500) was used to observe the melting behavior when the resin for evaluation was heated from 25 ° C. to 100 ° C. at 10 ° C./min at a magnification of 2000 times. The resin particle size at 25 ° C. before the temperature rise is defined as L25, the particle size of the resin particle at the time of reaching 100 ° C. after the temperature rise is defined as L100, and the spread rate = L100 / L25. The spreading rate was calculated, and the average value was evaluated as follows.
(Evaluation criteria)
A: Melt spread rate is 2.20 or more B: Melt spread rate is 2.00 or more and less than 2.20 C: Melt spread rate is 1.80 or more and less than 2.00 D: Melt spread rate is less than 1.80

〔Heat-resistant〕
5 g of each evaluation resin composition was placed in a 50 cc polycup and allowed to stand for 3 days at a temperature of 55 ° C./humidity of 10% RH, and the presence or absence of aggregates was examined and evaluated.
(Evaluation criteria)
A: No agglomerates are generated B: Minor agglomerates are generated, and they are broken when pressed lightly with a finger C: Agglomerates are generated, and they are not broken even when pressed lightly with a finger D: Completely aggregated

[Bleed]
The resin composition for evaluation was pressurized at 25 MPa for 30 minutes to a thickness of 1.5 mm (length 100 mm,
A test piece having a width of 50 mm) was prepared, and this test piece was allowed to stand for 30 days in an atmosphere of a temperature of 45 ° C. and a humidity of 95 RH%.
(Evaluation criteria)
A: No bleed out B: Almost no bleed out C: Minor bleed out D: With bleed out

[Examples 1-44]
In Examples 1-44, the said evaluation was performed using the resin compositions 1-44, respectively. The evaluation results are shown in Table 5.

[Comparative Examples 1-4]
In Comparative Examples 1-4, the said evaluation was performed using the resin compositions 45-48, respectively. The evaluation results are shown in Table 5.

Claims (6)

A block polymer having a polyester moiety and a vinyl polymer moiety,
The polyester moiety is a monomer (a) selected from the group consisting of the following monomer group A;
Obtained by condensation polymerization of a monomer (b) selected from the group consisting of the following monomer group B:
The polyester part is a block polymer characterized in that the content of the partial structure derived from the monomer (b) calculated from the following formula is 1.0 mol% or more and 30.0 mol% or less.
{Monomer (b) [mol] / [monomer (a) [mol] + monomer (b) [mol]]} × 100
Monomer group A: α, ω-linear aliphatic diol having 2 to 11 carbon atoms, α, ω-linear aliphatic dicarboxylic acid having 2 to 13 carbon atoms, and α, ω having 2 to 12 carbon atoms -Linear aliphatic monohydroxymonocarboxylic acids, compounds in which the carboxyl groups of these compounds are acid anhydrideated, alkylesterified compounds, and lactonized compounds.
Monomer group B: α, ω-linear aliphatic diol having 12 to 22 carbon atoms, α, ω-linear aliphatic dicarboxylic acid having 14 to 24 carbon atoms, α, ω- having 13 to 23 carbon atoms Straight chain aliphatic monohydroxy monocarboxylic acid, straight chain aliphatic primary monoalcohol having 12 to 22 carbon atoms, straight chain aliphatic primary monocarboxylic acid having 13 to 23 carbon atoms, and carboxyls of these compounds Compounds in which the group is acid anhydrideated, alkylesterified, and lactonized.   The block polymer according to claim 1, wherein the vinyl polymer moiety has a weight average molecular weight (Mw) of 3000 or more and 30000 or less.   The block polymer according to claim 1 or 2, wherein the block polymer has a melting point (Tm) of 25 ° C or higher and 85 ° C or lower.   The block polymer according to any one of claims 1 to 3, wherein a mass-based ratio (C / A ratio) between the polyester portion and the vinyl polymer portion is 25:75 to 70:30.   The block polymer according to any one of claims 1 to 4, wherein the block polymer has a weight average molecular weight (Mw) of 6000 or more and 60000 or less.   The plasticizer containing the block polymer of any one of Claims 1-5.

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