A process for the preparation of a fluoroolefin polymer from an azeotropic mixture of monomers having a constant composition, the process including the step of:

contacting in a reaction zone:

(i) an initiator; and

(ii) an azeotropic mixture of monomers including at least one fluoroolefin and, optionally, at least one ethylenically unsaturated comonomer capable of copolymerizing therewith;

wherein the contacting is carried out at a temperature, pressure and

length of time sufficient to produce the fluoroolefin polymer.

A process for the preparation of a fluoroolefin polymer from an azeotropic mixture of monomers having a constant composition, the process including the step of:

contacting in a reaction zone:

(i) an initiator; and

(ii) an azeotropic mixture of monomers including at least one fluoroolefin and, optionally, at least one ethylenically unsaturated comonomer capable of copolymerizing therewith;

wherein the contacting is carried out at a temperature, pressure and

length of time sufficient to produce the fluoroolefin polymer.

The invention relates to a method for preparation of a polymer from monomers comprising polyvinylidene fluoride, trifluoroethylene and a third monomer, the method successively comprising: injection of all the monomers to react into a reactor; initiation of a polymerization of the monomers; a continuation step (a) of the polymerization of the monomers, during which a drop in pressure in the reactor is compensated.

The invention relates to a method for preparation of a polymer from monomers comprising polyvinylidene fluoride, trifluoroethylene and a third monomer, the method successively comprising: injection of all the monomers to react into a reactor; initiation of a polymerization of the monomers; a continuation step (a) of the polymerization of the monomers, during which a drop in pressure in the reactor is compensated.

A polymeric molecule having the formula: X—[C(A).sub.2C(B)(B′)].sub.n-Q[CY═C(Z)(Z′)] or [C(A).sub.2=C(B)].sub.n-Q[C(Y)(Y′)—C(Z)(Z′)]—X′, wherein A is either H or F; B and B′ are either H, F, or Cl, and are not necessarily the same; X and X′ are Br, Cl or I (and are not necessarily the same); Y and Y′ are F, Br, Cl or I (and are not necessarily the same); and wherein Z and Z′ are F, Br, Cl or I (and are not necessarily the same); Q is optional and is either oxygen (O) or sulfur (S); and n is at least 1.

A polymeric molecule having the formula: X—[C(A).sub.2C(B)(B′)].sub.n-Q[CY═C(Z)(Z′)] or [C(A).sub.2=C(B)].sub.n-Q[C(Y)(Y′)—C(Z)(Z′)]—X′, wherein A is either H or F; B and B′ are either H, F, or Cl, and are not necessarily the same; X and X′ are Br, Cl or I (and are not necessarily the same); Y and Y′ are F, Br, Cl or I (and are not necessarily the same); and wherein Z and Z′ are F, Br, Cl or I (and are not necessarily the same); Q is optional and is either oxygen (O) or sulfur (S); and n is at least 1.

A polymeric molecule having the formula: X—[C(A).sub.2C(B)(B′)].sub.n-Q[CY═C(Z)(Z′)] or [C(A).sub.2=C(B)].sub.n-Q[C(Y)(Y′)—C(Z)(Z′)]—X′, wherein A is either H or F; B and B′ are either H, F, or Cl, and are not necessarily the same; X and X′ are Br, Cl or I (and are not necessarily the same); Y and Y′ are F, Br, Cl or I (and are not necessarily the same); and wherein Z and Z′ are F, Br, Cl or I (and are not necessarily the same); Q is optional and is either oxygen (O) or sulfur (S); and n is at least 1.

A method of preparing a fluoroelastomer capable of being vulcanized by using peroxide, the method comprising: in the presence of an initiator and a chain transfer agent, conducting emulsion polymerization reaction on comonomers to obtain a fluoroelastomer. The preparation method utilizes alkyl iodide RI.sub.x as the chain transfer agent, and introduces the atom I into the molecular structure of the polymer during the reaction, the atom I acting as a crosslinking point during peroxide vulcanization. The fluoroelastomer obtained via the preparation method greatly improves the performance after being vulcanized; in addition, due to the low cost and extensive sources of alkyl iodide, the preparation method also simplifies the manufacturing process, reduces cost, and has wide application prospects.

A method of preparing a fluoroelastomer capable of being vulcanized by using peroxide, the method comprising: in the presence of an initiator and a chain transfer agent, conducting emulsion polymerization reaction on comonomers to obtain a fluoroelastomer. The preparation method utilizes alkyl iodide RI.sub.x as the chain transfer agent, and introduces the atom I into the molecular structure of the polymer during the reaction, the atom I acting as a crosslinking point during peroxide vulcanization. The fluoroelastomer obtained via the preparation method greatly improves the performance after being vulcanized; in addition, due to the low cost and extensive sources of alkyl iodide, the preparation method also simplifies the manufacturing process, reduces cost, and has wide application prospects.

To provide a curable resin composition capable of forming a coating film excellent in the weather resistance and the impact resistance with a high productivity even on a member having a complicated shape for outdoor use.

A curable resin composition containing the following fluorinated copolymer (A) and the following compound (B):

fluorinated copolymer (A): a fluorinated copolymer having a unit derived from a fluoroolefin, a unit having an ethylenic unsaturated group in its side chain, and a unit having a functional group, wherein the unit having a functional group is at least one member selected from a unit having a hydroxy group, a unit having a carboxy group and a unit having an alkoxysilyl group;

compound (B): a compound having an acryloyl group or methacryloyl group and at least two isocyanate groups in one molecule.