Inhibition by oxygen of the peroxide-initiated cure of a composition based on (meth)acrylates or other compounds containing free radical-polymerizable functional groups is mitigated by inclusion of one or more polythiols in the composition. Such compositions may be formulated as multi-part systems, which are useful for the preparation of coatings and sealants.

The present invention relates to a polyarylene sulfide having more improved miscibility with other polymer materials or fillers, and a method of preparing the same. At least part of end groups of the main chain of the polyarylene sulfide is carboxyl group (COON) or amine group (NH.sub.2).

The present invention relates to a polyarylene sulfide having more improved miscibility with other polymer materials or fillers, and a method of preparing the same. At least part of end groups of the main chain of the polyarylene sulfide is carboxyl group (COON) or amine group (NH.sub.2).

Curable sealant compositions comprise the components: a) x weight percent of at least one polythiol; b) y weight percent of at least one unsaturated compound having at least two non-aromatic carbon-carbon double bonds, at least one carbon-carbon triple bond, or a combination thereof; c) from 0.01 to 8 weight percent of at least one organoborane-amine complex; d) from 0.05 to 10 weight percent of at least one organic peroxide; and e) from 0.01 to 10 weight percent of a photoinitiator system capable of generating free radicals upon exposure to actinic radiation. Each of x and y represents a positive real number. The sum x+y is in the range of 72 to 99. The weight percent ranges of the components a)-e) are based on the total weight of the components a)-e). A seal cap including the curable sealant composition and methods of making and using the curable sealant compositions are also disclosed.

A polymerizable composition for an optical material includes an episulfide compound (A); an organic coloring matter (B); an UV absorber (C); and a polymerization catalyst (D), wherein the organic coloring matter (B) has a main absorption peak (P) between 565 nm and 605 nm in a visible light absorption spectrum, an absorption coefficient (ml/g.Math.cm) of a peak apex (Pmax) exhibiting a maximum absorption coefficient of (P) is equal to or greater than 0.5105, a peak width in an absorbance of of an absorbance of (Pmax) of (P) is equal to or less than 50 nm, a peak width in an absorbance of of the absorbance of (Pmax) of (P) is equal to or less than 30 nm, and a peak width in an absorbance of of the absorbance of (Pmax) of (P) is in a range of equal to or less than 20 nm.

A polymerizable composition for an optical material includes an episulfide compound (A); an organic coloring matter (B); an UV absorber (C); and a polymerization catalyst (D), wherein the organic coloring matter (B) has a main absorption peak (P) between 565 nm and 605 nm in a visible light absorption spectrum, an absorption coefficient (ml/g.Math.cm) of a peak apex (Pmax) exhibiting a maximum absorption coefficient of (P) is equal to or greater than 0.5105, a peak width in an absorbance of of an absorbance of (Pmax) of (P) is equal to or less than 50 nm, a peak width in an absorbance of of the absorbance of (Pmax) of (P) is equal to or less than 30 nm, and a peak width in an absorbance of of the absorbance of (Pmax) of (P) is in a range of equal to or less than 20 nm.

Disclosed is a production method comprising a step of obtaining a poly(arylene sulfonium salt) comprising a terminal group including at least one functional group selected from the group consisting of a carboxy group, a hydroxy group and an amino group, and a step of dealkylating or dearylating the poly(arylene sulfonium salt) to obtain a polyarylene sulfide resin, and a polyarylene sulfide resin comprising a terminal group including a functional group obtainable by the production method.

Disclosed is a production method comprising a step of obtaining a poly(arylene sulfonium salt) comprising a terminal group including at least one functional group selected from the group consisting of a carboxy group, a hydroxy group and an amino group, and a step of dealkylating or dearylating the poly(arylene sulfonium salt) to obtain a polyarylene sulfide resin, and a polyarylene sulfide resin comprising a terminal group including a functional group obtainable by the production method.

The present invention relates to a method of preparing a polyphenylene sulfide and a high-viscosity polyphenylene sulfide prepared using the method. In this method, the ratio of an organic phase to an aqueous phase is controlled by controlling dehydration conditions, so that high viscosity may be realized without adversely affecting a reaction or physical properties during preparation of the polyphenylene sulfide.

A leuco polymer comprising a polymeric carbohydrate and a leuco moiety. The polymeric carbohydrate and the leuco moiety are covalently bound. Methods of making the leuco polymer, laundry care compositions comprising the leuco polymer and methods of treating textiles with such laundry care compositions.