A polymer composition is disclosed which composition includes at least a first polymer and a second polymer. The first polymer is made up of at least 10 mole percent repeat units of (3-hydroxypropionate). The second polymer is made up of a poly(hydroxyalkanoate) which does not include repeat units of (3-hydroxypropionate). A method for making the first polymer is also disclosed.

An example of a jettable antioxidant formulation is for three-dimensional (3D) printing. The jettable antioxidant formulation includes an antioxidant blend; a surfactant, a dispersant, or a combination thereof; a water soluble or water miscible organic co-solvent; and water. The antioxidant blend consists of a primary antioxidant and a secondary antioxidant.

In one or more embodiments, the present invention provides a polymer composition for use in, cosmetics, coatings, inks, polymer compounding formulation comprising an all-natural, DHN-based, nitrogen-free black knot fungal (BKF) allomelanin extracted from black knots (a fungal growth formed by Apiosporina morbosa). The BKF melanin is naturally sourced, economically extracted, and quite unexpectedly, has been found to have better UV absorbing and antioxidant properties than synthetic melanin (polydopamine) and commercially available sepia melanin. In various embodiments, a small amount of the BKF melanin is substantially uniformly blended into a polymer or similar material to create a composition having excellent UV absorption and antioxidant properties. Surprisingly, it has also been found that the UV absorption and antioxidant properties of these polymer compositions can withstand heating and other processing steps associated with polymers, and in particular, rubber without significant reduction in effectiveness.

The present invention relates to a new photo-initiating composition for red and near infrared-induced photopolymerization, method of using same in photopolymerization reactions and polymers obtained by such method.

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The invention provides a hydrolytically stabilised phosphite composition, comprising: a. a phosphite antioxidant which is a liquid at ambient conditions and comprises a blend of at least two different phosphites of Formula I: wherein R.sub.1, R.sub.2 and R.sub.3 are independently selected alkylated aryl groups of Formula II: wherein R.sub.4, R.sub.5 and R.sub.6 are independently selected from the group consisting of hydrogen and C.sub.1 to C.sub.6 alkyl, provided that at least one of R.sub.4, R.sub.5 and R.sub.6 in each phosphite is selected from the group consisting of tert-butyl and/or tert-pentyl; and b. a nitrogen-containing compound comprising a nitrogen atom, wherein the nitrogen atom: i. has a pKaH value of from about 7 to about 11; and ii. is sp.sup.3 hybridised, and wherein the nitrogen-containing compound is absent any labile protons.

Provided is a gas barrier material having superior gas barrier properties. This gas barrier material 1 comprises a matrix resin 2, and a carbon material 3 disposed in the matrix resin 2, wherein the carbon material 3 contains a partially exfoliated graphite having a structure in which graphite is partially exfoliated.

The invention relates to the use of an additive as oxygen scavenger in a plastic material, wherein (a) the plastic material is a polyester, a polyolefin, a polyolefin copolymer or a polystyrene, and the additive (b) is a light stabilizer and optionally a transition metal compound.

The present invention provides among other things a composition of a polymeric reagent and an antioxidant, such as butylated hydroxyl toluene.

To provide an oxygen-absorbing polyester resin composition which exhibits excellent oxygen-absorbing capability even in the absence of transition metal catalyst without affected by the glass transition temperature of a polyester resin that is contained as a base resin. The oxygen-absorbing polyester resin composition including a base resin (A) which is a polyester resin, an oxygen-absorbing component (B) which is a compound having an unsaturated alicyclic structure, and an oxidation promotion component (C) for promoting the oxidation of the oxygen-absorbing component (B), said oxidation promotion component (C) being a compound having a benzyl hydrogen.

The invention relates to compounds of the structure of formula I and II:

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where X is selected from the group consisting of O, S and NH; Y, A and B are independently selected from the group consisting of N and CH; D, E and F are independently selected from the group consisting of CH, N, O and S; the symbol ---- represents a single or a double bond; and R.sub.1, R.sub.2 and R.sub.3 are independently selected from the group consisting of H, electron withdrawing groups and electron releasing groups. In other embodiments, the compounds are used as oxygen scavengers and in barrier compositions and articles.