A coating composition dispersion including: at least one of an aqueous dispersion of composite particles (C) including an aqueous medium containing water, and composite particles dispersed in the aqueous medium, in which the composite particles have a particle (A) and a polymer layer (B) with which at least a part of a surface of the particle (A) is coated, and comprises 0.12% by mass or less of a phosphorus atom based on a total mass of the composite particles; and an another aqueous dispersion of polymer particles (D);
wherein a weather resistance modification value represented by the following formula |b.sub.0b|/(b.sub.0+b) is 0.15 or more, the formula being represented by a color difference b value of a coating film of a coating composition dispersion having from 100/0 to 1/99 of a solid content mass ratio of the aqueous dispersion of composite particles (C) and the another aqueous dispersion of polymer particles (D), (solid content mass of component (C)/solid content mass of component (D)), and a color difference b.sub.0 value of a coating film of the another aqueous dispersion of polymer particles (D).

A coating composition dispersion including: at least one of an aqueous dispersion of composite particles (C) including an aqueous medium containing water, and composite particles dispersed in the aqueous medium, in which the composite particles have a particle (A) and a polymer layer (B) with which at least a part of a surface of the particle (A) is coated, and comprises 0.12% by mass or less of a phosphorus atom based on a total mass of the composite particles; and an another aqueous dispersion of polymer particles (D);
wherein a weather resistance modification value represented by the following formula |b.sub.0b|/(b.sub.0+b) is 0.15 or more, the formula being represented by a color difference b value of a coating film of a coating composition dispersion having from 100/0 to 1/99 of a solid content mass ratio of the aqueous dispersion of composite particles (C) and the another aqueous dispersion of polymer particles (D), (solid content mass of component (C)/solid content mass of component (D)), and a color difference b.sub.0 value of a coating film of the another aqueous dispersion of polymer particles (D).

An aqueous binder composition for a positive electrode of a secondary battery electrode, comprising a copolymer and a dispersion medium, wherein the copolymer comprises a structural unit (a) derived from a carboxylic acid group-containing monomer, a structural unit (b) derived from an amide group-containing monomer and a structural unit (c) derived from a nitrile group-containing monomer, with an improved binding capability. In addition, battery cells comprising the cathode prepared using the binder composition disclosed herein exhibits exceptional electrochemical performance.

An aqueous binder composition for a positive electrode of a secondary battery electrode, comprising a copolymer and a dispersion medium, wherein the copolymer comprises a structural unit (a) derived from a carboxylic acid group-containing monomer, a structural unit (b) derived from an amide group-containing monomer and a structural unit (c) derived from a nitrile group-containing monomer, with an improved binding capability. In addition, battery cells comprising the cathode prepared using the binder composition disclosed herein exhibits exceptional electrochemical performance.

The present invention is concerned with a reactive surfactant composition for emulsion polymerization, which is able to micronize the particle diameter of a polymer emulsion and to reduce the addition amount of the reactive surfactant composition to be used.

The reactive surfactant composition for emulsion polymerization of the present invention contains a reactive anionic surfactant (component A) represented by the following formula (I), the component A being satisfied with the following requirement R:

##STR00001## wherein AO represents an alkyleneoxy group having a carbon number of 3 or more and 18 or less; EO represents an ethyleneoxy group; p represents an integer of 1 or more and 15 or less; m represents an integer of 0 or more; n represents an integer of 0 or more; W represents a hydrogen ion or a cation; and plural kinds of AOs may coexist.

Requirement R: An average addition molar number m of AO is a number of 1 or more and 50 or less; an average addition molar number n of EO is a number of 0 or more and 200 or less; and when in the component A, a component having an addition molar number of AO of (m3) or less is defined as (component A-1), and a component having an addition molar number of AO of (m+2) or more is defined as (component A-2), X in the following formula (I) is less than 30, provided that when m is less than 3, (m=0) is defined as (component A-1):

X={(molar number of component A-1)+(molar number of component A-2)}(molar number of component A)100(I).

The present invention is concerned with a reactive surfactant composition for emulsion polymerization, which is able to micronize the particle diameter of a polymer emulsion and to reduce the addition amount of the reactive surfactant composition to be used.

The reactive surfactant composition for emulsion polymerization of the present invention contains a reactive anionic surfactant (component A) represented by the following formula (I), the component A being satisfied with the following requirement R:

##STR00001## wherein AO represents an alkyleneoxy group having a carbon number of 3 or more and 18 or less; EO represents an ethyleneoxy group; p represents an integer of 1 or more and 15 or less; m represents an integer of 0 or more; n represents an integer of 0 or more; W represents a hydrogen ion or a cation; and plural kinds of AOs may coexist.

Requirement R: An average addition molar number m of AO is a number of 1 or more and 50 or less; an average addition molar number n of EO is a number of 0 or more and 200 or less; and when in the component A, a component having an addition molar number of AO of (m3) or less is defined as (component A-1), and a component having an addition molar number of AO of (m+2) or more is defined as (component A-2), X in the following formula (I) is less than 30, provided that when m is less than 3, (m=0) is defined as (component A-1):

X={(molar number of component A-1)+(molar number of component A-2)}(molar number of component A)100(I).

An effect paint for automobiles, comprising water, a dispersant (A), cellulose nanofibers (B), and an effect pigment (C).

An effect paint for automobiles, comprising water, a dispersant (A), cellulose nanofibers (B), and an effect pigment (C).

Provided is a thermosensitive recording medium having a sufficient water resistance to moisture and humidity, such as for outdoor use in rainy weather and the like, and also having a superior color developing sensitivity, print image quality when printing at high speed, ink fixability and solvent resistance and the like. As the protective layer comprises a specific silane-modified acrylic resin which is an aqueous emulsion of core-shell type p articles, in a thermosensitive recording medium having a thermosensitive recording layer on a substrate and a protective layer on the thermosensitive recording layer, the thermosensitive re cording medium has a sufficient water resistance and also has a superior color developing sensitivity, print image quality when printing at high speed, ink fixability and solvent resistance and the like.

Provided is a thermosensitive recording medium having a sufficient water resistance to moisture and humidity, such as for outdoor use in rainy weather and the like, and also having a superior color developing sensitivity, print image quality when printing at high speed, ink fixability and solvent resistance and the like. As the protective layer comprises a specific silane-modified acrylic resin which is an aqueous emulsion of core-shell type p articles, in a thermosensitive recording medium having a thermosensitive recording layer on a substrate and a protective layer on the thermosensitive recording layer, the thermosensitive re cording medium has a sufficient water resistance and also has a superior color developing sensitivity, print image quality when printing at high speed, ink fixability and solvent resistance and the like.