Provided is a surface treatment agent which does not use fluorine-containing monomers, particularly fluoroalkyl group-containing monomers. Additionally, provided is a copolymer which includes a first polymer formed from first monomers, and a second polymer formed from second monomers. The copolymer does not include fluorine. The second polymer is polymerized in the presence of the first polymer. The first monomers include a long-chain acrylate ester monomer (a) represented by the formula CH.sub.2=CA.sup.11-C(O)O-A.sup.12 (in the formula, A.sup.11 represents hydrogen, a monovalent organic group, or a halogen, and A.sup.12 represents a C.sub.18-30 straight-chain or branched hydrocarbon group). The first monomers and the second monomers both include a halogenated olefin monomer (b).

Provided is a water repellent composition which does not use a fluorine-containing monomer, especially a fluoroalkyl group-containing monomer. A water repellent composition which contains (1) (a) a polymer which has a repeating unit derived from an amide group-containing monomer that is represented by formula:

##STR00001##

(wherein R1 represents an organic residue having an ethylenically unsaturated polymerizable group; R2 represents a hydrocarbon group having 7-30 carbon atoms; and R3 represents a hydrocarbon group having 1-5 carbon atoms) in an amount of 2-100% by weight relative to the polymer, and (2) a liquid medium.

Provided is a water repellent composition which does not use a fluorine-containing monomer, especially a fluoroalkyl group-containing monomer. A water repellent composition which contains (1) (a) a polymer which has a repeating unit derived from an amide group-containing monomer that is represented by formula:

##STR00001##

(wherein R1 represents an organic residue having an ethylenically unsaturated polymerizable group; R2 represents a hydrocarbon group having 7-30 carbon atoms; and R3 represents a hydrocarbon group having 1-5 carbon atoms) in an amount of 2-100% by weight relative to the polymer, and (2) a liquid medium.

A composition of matter including a mother solution; an organic ester; an additive agent and deionized water. The mother solution includes a rare earth compound or a metal compound, an organic acid, an organic amine, and deionized water. Also provided is a method of preparing the composition of matter. The method includes: 1) heating deionized water to a temperature of 50-60 C.; adding an organic acid to the deionized water, allowing to dissolve, followed by addition of a rare earth compound or a metal compound, 2-4 hours later, adding an organic amine, heating to a temperature of 70-80 C. and holding; cooling and filtering to yield a mother solution; 2) mixing the mother solution, deionized water, and a catalyst; vacuumizing a resulting mixture, heating the mixture to a temperature of 95-125 C. and holding, following by addition of a polymerization inhibitor and an organic ester; 2-4 hours later, cooling, standing, separating.

A composition of matter including a mother solution; an organic ester; an additive agent and deionized water. The mother solution includes a rare earth compound or a metal compound, an organic acid, an organic amine, and deionized water. Also provided is a method of preparing the composition of matter. The method includes: 1) heating deionized water to a temperature of 50-60 C.; adding an organic acid to the deionized water, allowing to dissolve, followed by addition of a rare earth compound or a metal compound, 2-4 hours later, adding an organic amine, heating to a temperature of 70-80 C. and holding; cooling and filtering to yield a mother solution; 2) mixing the mother solution, deionized water, and a catalyst; vacuumizing a resulting mixture, heating the mixture to a temperature of 95-125 C. and holding, following by addition of a polymerization inhibitor and an organic ester; 2-4 hours later, cooling, standing, separating.

A process to prepare a vinylidene chloride heteropolymer comprising copolymerizing vinylidene chloride with at least one comonomer selected from the group consisting of alkyl acrylates, non-vinylidene chloride vinyl monomers and combinations thereof in the presence of an indicator, wherein the indicator is soluble in vinylidene chloride, the at least one comonomer, or a mixture of the vinylidene chloride and the at least one comonomer is provided.

A process to prepare a vinylidene chloride heteropolymer comprising copolymerizing vinylidene chloride with at least one comonomer selected from the group consisting of alkyl acrylates, non-vinylidene chloride vinyl monomers and combinations thereof in the presence of an indicator, wherein the indicator is soluble in vinylidene chloride, the at least one comonomer, or a mixture of the vinylidene chloride and the at least one comonomer is provided.

A process to prepare a vinylidene chloride heteropolymer comprising copolymerizing vinylidene chloride with at least one comonomer selected from the group consisting of alkyl acrylates, non-vinylidene chloride vinyl monomers and combinations thereof in the presence of an indicator, wherein the indicator is soluble in vinylidene chloride, the at least one comonomer, or a mixture of the vinylidene chloride and the at least one comonomer is provided.

A method for manufacturing a fluorine-free water repellent includes: mixing a paraffin, an inorganic nanopowder and a first reactive monomer to form a first mixture, in which the first reactive monomer includes a structure represented by formula (A), formula (B) or a combination thereof, the formula (A) is

##STR00001##

wherein X.sub.1 is a benzene, and the formula (B) is

##STR00002##

wherein X.sub.2 is CH.sub.3 or H and X.sub.3 is an alkyl group having 18 or more carbon atoms; mixing an emulsifier, a cosolvent and water to form a second mixture; mixing the first mixture and the second mixture to form a pre-emulsion; and adding an initiator and a second reactive monomer into the pre-emulsion, in which the first reactive monomer and the second reactive monomer are polymerized to form a water repellent, wherein the second reactive monomer is vinylidene chloride.

A method for manufacturing a fluorine-free water repellent includes: mixing a paraffin, an inorganic nanopowder and a first reactive monomer to form a first mixture, in which the first reactive monomer includes a structure represented by formula (A), formula (B) or a combination thereof, the formula (A) is

##STR00001##

wherein X.sub.1 is a benzene, and the formula (B) is

##STR00002##

wherein X.sub.2 is CH.sub.3 or H and X.sub.3 is an alkyl group having 18 or more carbon atoms; mixing an emulsifier, a cosolvent and water to form a second mixture; mixing the first mixture and the second mixture to form a pre-emulsion; and adding an initiator and a second reactive monomer into the pre-emulsion, in which the first reactive monomer and the second reactive monomer are polymerized to form a water repellent, wherein the second reactive monomer is vinylidene chloride.