Provided is a polycarbonate-polyorganosiloxane copolymer including polycarbonate blocks (A-1) each formed of a specific repeating unit and polyorganosiloxane blocks (A-2) each containing a specific repeating unit, wherein the polycarbonate-polyorganosiloxane copolymer satisfies the following expression (F1a):
15≤wM1  (F1a)
wherein wM1 represents the average content of the polyorganosiloxane blocks (A-2) in polycarbonate-polyorganosiloxane copolymers each having a molecular weight determined by using a polycarbonate as a conversion reference of from 56,000 or more to 200,000 or less among polycarbonate-polyorganosiloxane copolymers obtained through the separation of the polycarbonate-polyorganosiloxane copolymer by gel permeation chromatography.

Provided is a polycarbonate-polyorganosiloxane copolymer including polycarbonate blocks (A-1) each formed of a specific repeating unit and polyorganosiloxane blocks (A-2) each containing a specific repeating unit, wherein the polycarbonate-polyorganosiloxane copolymer satisfies the following expression (F1a):
15≤wM1  (F1a)
wherein wM1 represents the average content of the polyorganosiloxane blocks (A-2) in polycarbonate-polyorganosiloxane copolymers each having a molecular weight determined by using a polycarbonate as a conversion reference of from 56,000 or more to 200,000 or less among polycarbonate-polyorganosiloxane copolymers obtained through the separation of the polycarbonate-polyorganosiloxane copolymer by gel permeation chromatography.

Meltable flame retardant compositions and fibers fabricated thereof are provided. Compositions of the present disclosure comprise a polymer, a nitrogenous compounds and/or a phosphorus compound. Fibers and compositions of the present disclosure can be used to make fabrics. When fibers, fabrics, and compositions of the present disclosure are exposed to flame, non-flammable gases are released such that the flames is retarded and/or extinguished.

This invention relates to a highly flame-retardant adhesive for high-polymer materials. The adhesive contains a phenolic hydroxyl flame retardant which is prepared from organic amino compounds by one-step reaction with simple and controllable synthesis conditions and high synthesis efficiency; and then the highly flame-retardant adhesive can be obtained by blending the flame-retardant and the adhesive. The highly flame-retardant adhesive synthesized in the invention can be directly used as an adhesive for polymer materials to produce high adhesion strength, or used as a basic formula and prepared into composite adhesives through the addition of other fillers, or used as a primer agent to modify surfaces of polymer materials, so as to meet different needs on various special occasions.

Provided are ophthalmic devices comprised of a reaction product of a composition comprising: (i) a crosslinked substrate network containing covalently bound activatable free radical initiators; and (ii) a grafting composition containing one or more ethylenically unsaturated compounds. Also provided are processes for making ophthalmic devices.

Provided are ophthalmic devices comprised of a reaction product of a composition comprising: (i) a crosslinked substrate network containing covalently bound activatable free radical initiators; and (ii) a grafting composition containing one or more ethylenically unsaturated compounds. Also provided are processes for making ophthalmic devices.

A phosphorus-containing resin composition comprises a first phosphorus-containing compound, a second phosphorus-containing compound and a maleimide resin; wherein the first phosphorus-containing compound comprises a compound of Formula (I), a compound of Formula (II), or a combination thereof, and wherein the second phosphorus-containing compound is different from the first phosphorus-containing compound, and the second phosphorus-containing compound is absent of a group capable of reacting with the maleimide resin.

A phosphorus-containing resin composition comprises a first phosphorus-containing compound, a second phosphorus-containing compound and a maleimide resin; wherein the first phosphorus-containing compound comprises a compound of Formula (I), a compound of Formula (II), or a combination thereof, and wherein the second phosphorus-containing compound is different from the first phosphorus-containing compound, and the second phosphorus-containing compound is absent of a group capable of reacting with the maleimide resin.

This invention relates to a highly flame-retardant adhesive for high-polymer materials. The adhesive contains a phenolic hydroxyl flame retardant which is prepared from organic amino compounds by one-step reaction with simple and controllable synthesis conditions and high synthesis efficiency; and then the highly flame-retardant adhesive can be obtained by blending the flame-retardant and the adhesive. The highly flame-retardant adhesive synthesized in the invention can be directly used as an adhesive for polymer materials to produce high adhesion strength, or used as a basic formula and prepared into composite adhesives through the addition of other fillers, or used as a primer agent to modify surfaces of polymer materials, so as to meet different needs on various special occasions.

The invention relates to flame-retardant polyamide compositions comprising polyamide having a melting point of not more than 290° C. as component A, fillers and/or reinforcers as component B, phosphinic salt of the formula (I) as component C

##STR00001## in which R.sub.1 and R.sub.2 are ethyl, M is Al, Fe, TiO.sub.p or Zn, m is 2 to 3, and p=(4−m)/2 compound selected from the group of the Al, Fe, TiO.sub.p and Zn salts of ethylbutylphosphinic acid, of dibutylphosphinic acid, of ethylhexylphosphinic acid, of butylhexylphosphinic acid and/or of dihexylphosphinic acid as component D phosphonic salt of the formula (II) as component E

##STR00002## in which R.sub.3 is ethyl, Met is Al, Fe, TiO.sub.q or Zn, n is 2 to 3, and q=(4−n)/2 melamine polyphosphate having an average degree of condensation of 2 to 200 as component F, and wax selected from the group of the polyolefin waxes, amide waxes, natural waxes, long-chain aliphatic carboxylic acids and/or the esters or salts thereof as component G.

The polyamide compositions can be used for production of fibers, films and shaped bodies, especially for applications in the electricals and electronics sector.