A microencapsulated polyaddition catalyst comprises a capsule core, containing polyaddition catalyst, and an acrylic copolymer capsule shell, the acrylic copolymer comprising copolymerized units of an intermolecular anhydride of an ethylenically unsaturated C.sub.3-C.sub.12 carboxylic acid. The polyaddition catalyst is selected from acyclic tertiary amines, alicyclic tertiary amines, N-alkylimidazoles, phosphines and organic metal salts. It is suitable for catalysing the reaction of a polyol compound with a polyisocyanate compound. The polyaddition catalyst is released by a chemical stimulus, such as on contact with polyols or water, for example.

A microencapsulated polyaddition catalyst comprises a capsule core, containing polyaddition catalyst, and an acrylic copolymer capsule shell, the acrylic copolymer comprising copolymerized units of an intermolecular anhydride of an ethylenically unsaturated C.sub.3-C.sub.12 carboxylic acid. The polyaddition catalyst is selected from acyclic tertiary amines, alicyclic tertiary amines, N-alkylimidazoles, phosphines and organic metal salts. It is suitable for catalysing the reaction of a polyol compound with a polyisocyanate compound. The polyaddition catalyst is released by a chemical stimulus, such as on contact with polyols or water, for example.

The present invention provides a methacrylic resin composition comprising 100 parts by mass of a methacrylic resin comprising 50 to 97% by mass of a methacrylic acid ester monomer unit (A), 3 to 30% by mass of a structural unit (B) having a ring structure in the backbone, and 0 to 20% by mass of an additional vinyl monomer unit (C) copolymerizable with a methacrylic acid ester monomer, and 0.001 to 0.2 parts by mass of a compound (D) having a predetermined structure, the methacrylic resin composition satisfying the following conditions (I) and (II):
(I): a weight-average molecular weight of the methacrylic resin composition as measured by gel permeation chromatography (GPC) is 65,000 to 300,000, and
(II): a mass ratio between the component (D) and the structural unit (B) having a ring structure in the backbone is 25≤(B)/(D)≤1000.

An object is to providing a coating composition for attaining excellent storage stability of a coating material, excellent stain resistance (a property of preventing stains from adhering or a property of removing stains) of a coating film, and excellent durability of stain resistance of the coating film, and excellent scratch resistance of the coating film, and having transparency, and protecting the appearance for a long period of time, as well as a method of forming the coating film of the same. As a solution, provided is a coating composition comprising a silyl group-containing acrylic resin (A), a silyl group-free acrylic resin containing hydroxyl group (B), a polyisocyanate compound (C), and a catalyst (D), wherein the silyl group-containing acrylic resin (A) includes at least one polydimethyl siloxane segment.

An object is to providing a coating composition for attaining excellent storage stability of a coating material, excellent stain resistance (a property of preventing stains from adhering or a property of removing stains) of a coating film, and excellent durability of stain resistance of the coating film, and excellent scratch resistance of the coating film, and having transparency, and protecting the appearance for a long period of time, as well as a method of forming the coating film of the same. As a solution, provided is a coating composition comprising a silyl group-containing acrylic resin (A), a silyl group-free acrylic resin containing hydroxyl group (B), a polyisocyanate compound (C), and a catalyst (D), wherein the silyl group-containing acrylic resin (A) includes at least one polydimethyl siloxane segment.

The present invention provides a pressure-sensitive adhesive composition, including a copolymer obtained by polymerizing (A) at least one of unsaturated compounds represented by the following formula (1) and (B) at least one selected from the group consisting of: an unsaturated carboxylic acid; and an unsaturated carboxylic acid ester compound except for the component (A), a method of producing the pressure-sensitive adhesive composition, and a re-peelable sheet:

##STR00001##

wherein R.sup.1 represents a hydrocarbon group or acyl group having 8 to 36 carbon atoms, A.sup.1 and A.sup.2 each independently represent an alkylene group having 2 to 4 carbon atoms, L represents a group represented by the following general formula (2), “z” represents a number from 1 to 10, X represents a hydrogen atom or an ionic hydrophilic group, “m” represents a number from 0 to 100, and “n” represents a number from 0 to 100;

##STR00002##

wherein R.sup.2 and R.sup.3 each independently represent a hydrogen atom or a methyl group, “x” represents a number from 0 to 12, and “y” represents a number of 0 or 1.

The present invention provides a pressure-sensitive adhesive composition, including a copolymer obtained by polymerizing (A) at least one of unsaturated compounds represented by the following formula (1) and (B) at least one selected from the group consisting of: an unsaturated carboxylic acid; and an unsaturated carboxylic acid ester compound except for the component (A), a method of producing the pressure-sensitive adhesive composition, and a re-peelable sheet:

##STR00001##

wherein R.sup.1 represents a hydrocarbon group or acyl group having 8 to 36 carbon atoms, A.sup.1 and A.sup.2 each independently represent an alkylene group having 2 to 4 carbon atoms, L represents a group represented by the following general formula (2), “z” represents a number from 1 to 10, X represents a hydrogen atom or an ionic hydrophilic group, “m” represents a number from 0 to 100, and “n” represents a number from 0 to 100;

##STR00002##

wherein R.sup.2 and R.sup.3 each independently represent a hydrogen atom or a methyl group, “x” represents a number from 0 to 12, and “y” represents a number of 0 or 1.

Acid-functionalized copolymers of methyl methacrylate having relatively high glass transition temperatures and molecular weights may be employed to manufacture articles having high light transmission values, low haze, high heat resistance, and high environmental stability, which are useful as optical protection films, zero-zero optical retardation films, and compensation films as well as lighting pipes and optical imaging lenses.

Acid-functionalized copolymers of methyl methacrylate having relatively high glass transition temperatures and molecular weights may be employed to manufacture articles having high light transmission values, low haze, high heat resistance, and high environmental stability, which are useful as optical protection films, zero-zero optical retardation films, and compensation films as well as lighting pipes and optical imaging lenses.

A solid single-ion conductive polymer comprising a repeat unit of formula (Ia): ##STR00001## wherein R.sup.1 is H, or C.sub.1 to C.sub.16 linear or branched alkyl, alkenyl, alkinyl; m is 1 to 5; each M.sup.+ is independently selected from Li.sup.+, Na.sup.+ or K.sup.+; and X is selected from CF.sub.3, CH.sub.3, or F; and the polymer has an average molecular weight of 350.000 to 1.200.000 Da.