Kuraray Co., Ltd.

Yasushi Senda

Masahiro Kato

Shinya Oshita

Mikio Masuda

Yoshihiro Morishita

Yoshiaki Asanuma

Hideaki Suzuki

Nobuhiro Oya

Hiroyuki Arishima

Jun Koishikawa

Yoshihiro Aoki

A resin composition or the like may exhibit high vibration damping properties even at a relatively high temperature, have good moldability, and have excellent impact resistance. The resin composition contains a thermoplastic resin (A), a thermoplastic resin (B), and a polar resin (C), wherein the resin composition satisfies (1) to (3): (1) the thermoplastic resin (B) has at least one of a reactive functional group and a monomer unit containing a hetero atom; (2) the thermoplastic resin (A) and the thermoplastic resin (B) are different types of resins; (3) with respect to the total mass of the resin composition, the content of the thermoplastic resin (A) is 1 to 30% by mass, the content of the thermoplastic resin (B) is 1 to 30% by mass, and the content of the polar resin (C) is 40 to 98% by mass.

Resin composition, method for producing resin composition, and molded article

Provided is a hydrogenated block copolymer, which is a hydrogenation product of a block copolymer including a polymer block (A) containing more than 70 mol % of a structural unit derived from an aromatic vinyl compound and a polymer block (B) containing 30 mol % or more of a structural unit derived from at least one selected from the group consisting of a conjugated diene compound and isobutylene, the hydrogenated block copolymer being satisfied with the following requirements (1) and (2): Requirement (1): the content of the polymer block (A) in the block copolymer is 1 to 30% by mass; and Requirement (2): when the polymer block (B) is regarded as having a structure with a hydrogenation rate of 100 mol %, an average value of a methylene chain length of a main chain of the structural unit derived from at least one selected from the group consisting of a conjugated diene compound and isobutylene is 1.0 to 6.0.

Hydrogenated block copolymer, vibration damper, sound insulator, interlayer for laminated glass, dam rubber, shoe sole material, flooring material, laminate, and laminated glass

A block copolymer or a hydrogenate thereof, containing a polymer block (A) and a polymer block (B), in which the polymer block (B) has a structural unit derived from a conjugated diene compound, the structural unit including one or more kinds of alicyclic skeletons (X) represented by a formula (X) in the main chain.

Block copolymer or hydrogenated product of same

A block copolymer including a polymer block (A) containing more than 70 mol % of a unit derived from an aromatic vinyl compound, and a polymer block (B) containing 30 mol % or more of a unit derived from a conjugated diene compound is provided. The block copolymer satisfies the conditions: (1): a content of the polymer block (A) in the block copolymer is 1 to 70% by mass; (2): a maximum width of a series of temperature regions where tan &#x3b4; measured in accordance with JIS K7244-10 (2005), under conditions including a strain amount of 0.1%, a frequency of 1 a measurement temperature of &#x2212;70 to 100&#xb0; C., and a temperature rise rate of 3&#xb0; C./min, is 1.0 or more is less than 16&#xb0; C.; (3): a temperature at a peak position of tan &#x3b4; in the condition (2) is 0&#xb0; C. to +50&#xb0; C.; and (4): a mobility parameter M indicating a mobility of the polymer block (B) is 0.01 to 0.25 sec.

Block copolymer hydrogenate, resin composition, and various applications thereof

The present invention relates to a modified hydrogenated product of a block copolymer having a polymer block (A) containing a structural unit derived from an aromatic vinyl compound, and a polymer block (B) containing a structural unit derived from a conjugated diene compound, a method of producing the modified hydrogenated product, and a resin composition containing the modified hydrogenated product. The modified hydrogenated product has one or more functional groups selected from an alkoxysilyl group, a carboxy group, an amino group, a hydroxy group, an epoxy group, and an acid anhydride-derived group, and satisfies the following conditions. Condition (1): after stay at 330&#xb0; C. for 30 min under nitrogen atmosphere, a weight change rate is &#x2212;5.5% or more. Condition (2): the peak top intensity of tan &#x3b4; measured in accordance with JIS K7244-10 (2005), under conditions including a strain amount of 0.1%, a frequency of 1 Hz, a measurement temperature of &#x2212;70 to 120&#xb0; C., and a temperature rise rate of 3&#xb0; C./min, is 1.0 or more.

Modified hydrogenated product, method for producing same, resin composition, and various uses thereof

Provided is a hydrogenated block copolymer, which is a hydrogenation product of a block copolymer including a polymer block (A) containing more than 70 mol % of a structural unit derived from an aromatic vinyl compound and a polymer block (B) containing 30 mol % or more of a structural unit derived from at least one selected from the group consisting of a conjugated diene compound and isobutylene, the hydrogenated block copolymer being satisfied with the following requirements (1) and (2):

A block copolymer hydrogenate, which is a hydrogenate of a block copolymer having a polymer block (A) containing a structural unit derived from an aromatic vinyl compound in an amount of more than 70 mol %, and a polymer block (B) containing a structural unit derived from a conjugated diene compound in an amount of 30 mol % or more, and further satisfies the following requirements: Requirement (1): The content of the polymer block (A) in the block copolymer hydrogenate is 1 to 30% by mass. Requirement (2): The conjugated diene compound contains isoprene. Requirement (3): A total content of the 1,2-bond unit and the 3,4-bond unit in the structural units derived from the conjugated diene compound is 60 mol % or more. Requirement (4): The hydrogenation rate of the polymer block (B) is 60 mol % or more. Requirement (5): The block copolymer hydrogenate has a serial temperature range where tan &#x3b4;, as measured according to JIS K7244-10 (2005) and under the conditions of a strain of 0.1%, a frequency of 1 Hz, a measurement temperature of &#x2212;70 to 100&#xb0; C. and a rate of temperature increase of 3&#xb0; C./min, is 1.0 or more, and the maximum width of the temperature range is 16&#xb0; C. or more.

Block copolymer hydrogenate, resin composition, and applications thereof

Provided are a resin composition, a pellet, a veil, a vibration damping material, a sound insulator, and an intermediate film for laminated glass, each of which is much more excellent in damping properties. Specifically, the resin composition is a resin composition containing the following block copolymer or hydrogenation product thereof (X); and a tackifier resin (Y) having a glass transition temperature of &#x2212;50 to 45&#xb0; C., wherein when a glass transition temperature of a polymer block (B) of the block copolymer or hydrogenation product thereof (X) is designated as Tg(X), and a glass transition temperature of the tackifier resin (Y) is designated as Tg(Y), an absolute value of a difference between Tg(X) and Tg(Y) is 50&#xb0; C. or lower,

Resin composition, pellet, veil, damping material, sound insulation material, and intermediate film for laminated glass

Provided are a foam molded body capable of improving damping properties and sound insulation properties of a panel and realizing weight reduction of a panel, a dam rubber, a complex of a dam rubber and a panel, and a method for increasing a sound transmission loss. The present invention is concerned with a foam molded body of a resin composition containing a block copolymer (I) which is a block copolymer having a polymer block (A) composed mainly of a structural unit derived from an aromatic vinyl compound and other polymer block (B), exhibits a peak top temperature of tan &#x3b4;, as measured under a condition of a thickness of a test piece of 1 mm, a strain amount of 0.1%, a frequency of 1 Hz, a measurement temperature of &#x2212;70 to 70&#xb0; C., and a temperature rise rate of 3&#xb0; C./min in conformity with JIS K7244-10 (2005), of &#x2212;50 to 50&#xb0; C., and has a peak top molecular weight determined in terms of standard polystyrene by gel permeation chromatography of 30,000 to 500,000; at least one olefin-based polymer (II) selected from the group consisting of an ethylene-propylene-diene copolymer rubber, an ethylene-vinyl acetate copolymer, and a polyethylene-based resin; a crosslinking agent (III); and a foaming agent (IV).

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Kamisu, Japan

Yasushi Senda