摘要:
Object: To provide thermally expandable microspheres having little sag. Resolution Means: The thermally expandable microspheres have a structure in which a foaming agent is encapsulated in an outer shell formed from a polymer, wherein, the ratio (%) of (R2/R1) × 100 is at least 105%, where R1 is the expansion ratio after the thermally expandable microspheres have been heat-treated for 5 minutes at 150°C and then foamed by heating for 2 minutes at 200°C, and R2 is the expansion ratio after the thermally expandable microspheres have been heat-treated for 5 minutes at 150°C and then foamed by heating for 4 minutes at 200°C.
摘要:
A nitrile copolymer rubber composition containing a nitrile copolymer rubber (A) which contains ±,²-ethylenically unsaturated nitrile monomer units (a1) 15 to 80 wt%, conjugated diene monomer units (a2) 20 to 85 wt%, and cationic monomer units and/or monomer units able to form cations (a3) 0 to 30 wt%, and flat cellulose particles (B) with an aspect ratio of 30 to 600, wherein a content of the flat cellulose particles (B) is 1 to 200 parts by weight with respect to 100 parts by weight of the nitrile copolymer rubber (A) is provided.
摘要:
Object: To provide thermally expandable microspheres having little sag. Resolution Means: The thermally expandable microspheres have a structure in which a foaming agent is encapsulated in an outer shell formed from a polymer, wherein, the ratio (%) of (R2/R1) × 100 is at least 105%, where R1 is the expansion ratio after the thermally expandable microspheres have been heat-treated for 5 minutes at 150°C and then foamed by heating for 2 minutes at 200°C, and R2 is the expansion ratio after the thermally expandable microspheres have been heat-treated for 5 minutes at 150°C and then foamed by heating for 4 minutes at 200°C.
摘要:
Disclosed are a heat-resistant SAN resin, a method of producing the same and a heat-resistant SAN resin composition comprising the same. More specifically, disclosed are a heat-resistant SAN resin produced using ingredients comprising 52 to 78% by weight of alpha-methylstyrene, 20 to 40% by weight of a vinyl cyanide compound and 2 to 8% by weight of hydroxyalkyl (meth)acrylate, a method of producing the same and a heat-resistant SAN resin composition comprising the same. Advantageously, provided are a heat-resistant SAN resin with maintained heat resistance, improved polymerization conversion rate and increased weight average molecular weight, a method of producing the same, and a heat-resistant SAN resin composition containing the same with excellent chemical resistance, superior mechanical properties and good balance between properties.
摘要:
The present invention relates to a binder composition for an electrode of a non-aqueous electrolyte battery, the binder composition comprising a polymer A containing 80% by weight or more and 99.9% by weight or less of a repeating unit derived from a monomer including a nitrile group and 0.1% by weight or more and 20% by weight or less of a repeating unit derived from an ethylenically unsaturated compound having no nitrile group, wherein the weight-average molecular weight of the polymer A is 500,000 to 2,000,000, and characterized in that the molecular weight distribution, i.e. Mw/Mn, of the polymer A is 13 or smaller, wherein Mw represents the weight-average molecular weight and Mn represents the number-average molecular weight of the polymer A.
摘要:
A nitrile rubber composition which contains a nitrile rubber (A) which contains ±,²-ethylenically unsaturated nitrile monomer units 20 to 80 wt%, conjugated diene monomer units which may be at least partially hydrogenated 20 to 80 wt%, and cationic monomer units 0 to 30 wt% and a layered inorganic filler (B) with a surface area particle size distribution where a) a median size (d50) of the cumulative surface area distribution is 0.20 µm to 6.0 µm and b) d90-d10 of the cumulative surface area distribution is 1.1 µm or more in a ratio of 1 to 100 parts by weight with respect to 100 parts by weigh of the nitrile rubber (A) is provided.
摘要:
The present invention provides a cross-linked rubber that is excellent in both fuel oil resistance and cold resistance. A cross-linkable rubber composition in accordance with the present invention contains: a nitrile group-containing copolymer rubber [A] including less than 30 wt% ±,²-ethylenically unsaturated nitrile monomer units (a1), conjugated diene monomer units (b1), and ±,²-ethylenically unsaturated dicarboxylic acid monoester monomer units (d1), wherein at least part of the conjugated diene monomer units (b1) is hydrogenated; a nitrile group-containing copolymer rubber [B] including not less than 30 wt% ±,²-ethylenically unsaturated nitrile monomer units (a2) and conjugated diene monomer units (b2), wherein at least part of the conjugated diene monomer units (b2) may be hydrogenated; and an amine-based cross-linking agent.