Methods of cross-linking or chain extending a polymeric material including a silane-modified poly(arylene ether) polymer (Si-PAE) in a shaped article include heating the shaped article from a temperature T.sub.1 to a temperature T.sub.2>T.sub.1, while maintaining the temperature at which the shaped article is heated within a specified range based on the increasing Tg of the polymeric material during the heating. Shaped articles cross-linked or chain extended by the methods are also described.

An oxymethylene copolymer resin composition, which includes (i) an oxymethylene copolymer, (ii) a derivative of an aryl boron fluoride compound, and (iii) a layered double hydroxide; and a method for producing the same.

A resin composition includes a modified poly(phenylene ether) compound having a carbon-carbon unsaturated double bond at a molecular end, a maleimide compound having two or more N-substituted maleimide groups in the molecule, and a styrene-based polymer having a weight-average molecular weight less than 10,000.

A capped poly(arylene ether) copolymer having the formula ##STR00001##
wherein Y is a divalent linking group of the formula ##STR00002## each occurrence of D is independently a group of the formula ##STR00003## each occurrence of Z is independently of the formula ##STR00004##
and Q.sup.1a, Q.sup.1b, R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, z, x, y, e, R.sup.a, R.sup.b, R.sup.c, R.sup.d, R.sup.e, W.sup.a, R, R, and m are as defined herein.

The present invention relates to a phosphinated poly(2,6-dimethy phenylene oxide)oligomer, specifically an unsaturated group-containing phosphinated poly(2,6-dimethy phenylene oxide)oligomer, and processes for producing the same. A thermoset produced from the unsaturated group-containing phosphinated poly(2,6-dimethy phenylene oxide)oligomers according to the present invention exhibits flame retardancy and has a low dielectric constant and dissipation factor and a high glass transition temperature.

An oxymethylene copolymer resin composition, which includes (i) an oxymethylene copolymer, (ii) a derivative of an aryl boron fluoride compound, and (iii) a layered double hydroxide; and a method for producing the same.

Methods of cross-linking or chain extending a polymeric material including a silane-modified poly(arylene ether) polymer (Si-PAE) in a shaped article include heating the shaped article from a temperature T.sub.1 to a temperature T.sub.2>T.sub.1, while maintaining the temperature at which the shaped article is heated within a specified range based on the increasing Tg of the polymeric material during the heating. Shaped articles cross-linked or chain extended by the methods are also described.

A capped poly(arylene ether) copolymer having the formula

##STR00001##

wherein Y is a divalent linking group of the formula

##STR00002## each occurrence of D is independently a group of the formula

##STR00003## each occurrence of Z is independently of the formula

##STR00004##

and Q.sup.1a, Q.sup.1b, R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, z, x, y, e, R.sup.a, R.sup.b, R.sup.c, R.sup.d, R.sup.e, W.sup.a, R, R, and m are as defined herein.

A resin composition includes a modified poly(phenylene ether) compound having a carbon-carbon unsaturated double bond at a molecular end, a maleimide compound having two or more N-substituted maleimide groups in the molecule, and a styrene-based polymer having a weight-average molecular weight less than 10,000.

The present invention relates to a phosphinated poly(2,6-dimethy phenylene oxide)oligomer, specifically an unsaturated group-containing phosphinated poly(2,6-dimethy phenylene oxide)oligomer, and processes for producing the same. A thermoset produced from the unsaturated group-containing phosphinated poly(2,6-dimethy phenylene oxide)oligomers according to the present invention exhibits flame retardancy and has a low dielectric constant and dissipation factor and a high glass transition temperature.