Abstract:
To provide a fluorinated curable resin composition which is excellent in thermal stability and thermal adhesive property. A fluorinated curable resin composition comprising a fluoropolymer (P) having a polymerizable double bond and a thiol compound (S), wherein the fluoropolymer (P) is a copolymer having repeating units derived from a fluoromonoene (a) and a fluorodiene (b) having a residual unsaturated side chain, and the content of the thiol compound (S) is from 0.01 to 1 part by mass per 100 parts by mass of the fluoropolymer (P).
Abstract:
The present invention provides a curable composition which can yield a fluorinated cured product excellent in transparency, light resistance, heat resistance, and mechanical strength, and minimally damaged by stress concentration. The invention relates to a curable composition comprising a perfluoro polymer (a) containing a unit derived from a perfluorodiene having two polymerizable carbon-carbon double bonds, wherein two carbon atoms in one carbon-carbon double bond form the main chain, and the other carbon-carbon double bond forms a side chain; a perfluorocyclic monoene (b) having at least 8 carbon atoms, which has an alicyclic structure made of carbon atoms and optionally containing an oxygen atom, and one polymerizable carbon-carbon double bond, wherein at least one of two carbon atoms forming the carbon-carbon double bond is a carbon atom constituting the alicyclic structure; and a polymerization initiator (i).
Abstract:
A plastic optical fiber which is a graded index optical fiber having a concentric inner/outer at least two layer structure, wherein the inner layer has a graded index structure made of a non-crystalline fluoropolymer (a) having substantially no C—H bond, and the outer layer has a refractive index lower than the refractive index of the outermost portion of the inner layer and is made of a fluoropolymer material (c) selected from the following 1) and 2): 1) a fluoropolymer (d) containing the same polymerized units as the polymerized units in the fluoropolymer (a), and 2) a mixture (f) of a fluoropolymer (a) with another fluoropolymer (e).
Abstract:
A refractive index distribution type light transmitting device comprising a non-crystalline polymer (a) and a metal chelate compound (b) having a difference in refractive index of at least 0.001 as compared with the non-crystalline polymer (a) and having a molecular weight of at least 400, wherein the metal chelate compound (b) is distributed in the non-crystalline polymer (a) with a concentration gradient in a specific direction.
Abstract:
A polymer which contains monomer units formed by polymerization of a fluorine-containing diene of formula 1: CF2═CF(CF2)nCXYOCF═CF2 Wherein X and Y are hydrogen and chlorine, hydrogen and-bromine, hydrogen and iodine, fluorine and chlorine, fluorine and bromine, fluorine and iodine, chlorine and bromine, chlorine and iodine, bromine and bromine, bromine and iodine, or iodine and iodine and n is an integer from 1 to 3.
Abstract:
A method for producing a fluorine-containing polymer, which comprises subjecting the following fluorine-containing monomer (a), (b), (c) or (d) to bulk polymerization by means of a polymerization initiator comprising a fluorine-containing organic peroxide having a 10 hour half value temperature of from 30 to 130° C., to obtain a fluorine-containing polymer having a fluorine-containing alicyclic structure in its main chain: (a) a fluorine-containing monomer having a fluorine-containing alicyclic structure, (b) a fluorine-containing monomer having at least two polymerizable double bonds, (c) the fluorine-containing monomer (a) and the fluorine-containing monomer (b), (d) at least one fluorine-containing monomer selected from the fluorine-containing monomers (a) and (b), and another fluorine-containing monomer other than the fluorine-containing monomers (a) and (b).
Abstract:
A fluorine-containing polymer composition comprising a polymer having a functional group and a fluorine-containing aliphatic cyclic structure dissolved in a solvent mixture of an aprotic fluorine-containing solvent and a protic fluorine-containing solvent.
Abstract:
A graded-refractive-index optical plastic material composed of an amorphous fluoropolymer (a) which has substantially no C--H bond and at least one material (b) which has substantially no C--H bond and differs from the fluoropolymer (a) in refractive index by at least 0.001, wherein the material (b) is distributed in the fluoropolymer (a) so as to have a concentration gradient in a specific direction, and the optical plastic material has a glass transition temperature which is substantially uniform throughout it.
Abstract:
A graded-refractive-index optical plastic material composed of an amorphous fluoropolymer (a) which substantially has no C-H bond and at least one material (b) which differs from the fluoropolymer (a) in refractive index by at least 0.001, wherein the material (b) is distributed in the fluoropolymer (a) so as to have a concentration gradient in a specific direction.
Abstract:
A process for producing a perfluoro copolymer, which comprises subjecting a perfluoro monomer having a carbon-carbon double bond with a different polymerization ability at each terminal of the molecule and perfluoro-2,2-dimethyl-1,3-dioxol to radical copolymerization.