Disclosed are hydrophobic, acrylic materials having both high refractive index and a high Abbe number. The materials may have an internal wetting agent, are well suited for use as implantable ophthalmic devices, and have a refractive index which may be edited through application of energy. When used for an intraocular lens, the high refractive index allows for a thin lens which compresses to allow a small incision size.

A positive resist composition comprising a base polymer comprising recurring units (a) having the structure of an ammonium salt of an iodized or brominated phenol, and recurring units (b1) having an acid labile group-substituted carboxyl group and/or recurring units (b2) having an acid labile group-substituted phenolic hydroxyl group exhibits a high sensitivity, high resolution, low edge roughness and dimensional uniformity, and forms a pattern of good profile after exposure and development.

A positive resist composition comprising a base polymer comprising recurring units (a) having the structure of an ammonium salt of an iodized or brominated phenol, and recurring units (b1) having an acid labile group-substituted carboxyl group and/or recurring units (b2) having an acid labile group-substituted phenolic hydroxyl group exhibits a high sensitivity, high resolution, low edge roughness and dimensional uniformity, and forms a pattern of good profile after exposure and development.

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.

An object of the present invention is to provide a transfer film capable of forming a laminate exhibiting excellent antireflection performance in a case of being transferred to a member to be transferred exhibiting a high refractive index. Another object of the present invention is to provide a laminate, an acoustic speaker, and a method for manufacturing a laminate.

A transfer film including a temporary support and a photosensitive composition layer, and further including a first layer having a lower refractive index than the refractive index of the photosensitive composition layer between the temporary support and the photosensitive composition layer, in which a refractive index of the first layer is 1.45 or less.

An object of the present invention is to provide a transfer film capable of forming a laminate exhibiting excellent antireflection performance in a case of being transferred to a member to be transferred exhibiting a high refractive index. Another object of the present invention is to provide a laminate, an acoustic speaker, and a method for manufacturing a laminate.

A transfer film including a temporary support and a photosensitive composition layer, and further including a first layer having a lower refractive index than the refractive index of the photosensitive composition layer between the temporary support and the photosensitive composition layer, in which a refractive index of the first layer is 1.45 or less.

A radiation-sensitive resin composition includes: a polymer which has a first structural unit including a phenolic hydroxyl group, and a second structural unit represented by formula (1); and a radiation-sensitive acid generating agent which has a compound represented by formula (2). R.sup.1 represents a hydrogen atom, or the like; R.sup.2 represents a hydrogen atom or the like; and R.sup.3 represents a divalent monocyclic alicyclic hydrocarbon group having 3 to 12 ring atoms. Ar.sup.1 represents a group obtained by removing (q+1) hydrogen atoms on an aromatic ring from an arene formed by condensation of at least two benzene rings; R.sup.4 represents a monovalent organic group having 1 to 20 carbon atoms; q is an integer of 0 to 7; and R.sup.5 represents a halogen atom, a hydroxy group, a nitro group, or a monovalent organic group having 1 to 20 carbon atoms, or the like.

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A radiation-sensitive resin composition includes: a polymer which has a first structural unit including a phenolic hydroxyl group, and a second structural unit represented by formula (1); and a radiation-sensitive acid generating agent which has a compound represented by formula (2). R.sup.1 represents a hydrogen atom, or the like; R.sup.2 represents a hydrogen atom or the like; and R.sup.3 represents a divalent monocyclic alicyclic hydrocarbon group having 3 to 12 ring atoms. Ar.sup.1 represents a group obtained by removing (q+1) hydrogen atoms on an aromatic ring from an arene formed by condensation of at least two benzene rings; R.sup.4 represents a monovalent organic group having 1 to 20 carbon atoms; q is an integer of 0 to 7; and R.sup.5 represents a halogen atom, a hydroxy group, a nitro group, or a monovalent organic group having 1 to 20 carbon atoms, or the like.

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An aqueous dispersion and an aqueous coating composition comprising the aqueous dispersion, and the aqueous coating composition providing coatings made therefrom with improved anti-corrosion property and good water resistance and block resistance.