This invention relates generally to vulcanization compounds and relates more specifically to vulcanization compositions with reduced allergenic potential that include accelerator compositions for vulcanizing elastomeric articles. Vulcanization compositions are disclosed that include a single fugitive dihydrocarbyl xanthogen polysulfide accelerator and a single aldehyde-aniline condensate accelerator.

This invention relates generally to vulcanization compounds and relates more specifically to vulcanization compositions with reduced allergenic potential that include accelerator compositions for vulcanizing elastomeric articles. Vulcanization compositions are disclosed that include a single fugitive dihydrocarbyl xanthogen polysulfide accelerator and a single aldehyde-aniline condensate accelerator.

This invention relates generally to vulcanization compounds and relates more specifically to vulcanization compositions with reduced allergenic potential that include accelerator compositions for vulcanizing elastomeric articles. Vulcanization compositions are disclosed that include a single fugitive dihydrocarbyl xanthogen polysulfide accelerator and a single aldehyde-aniline condensate accelerator.

The present invention generally relates to covalent network polymers prepared from an imine-linked oligomer and an independent crosslinker comprising reactive moieties selected from the group consisting of epoxy, isocyanate, bismaleimide, sulfide, polyurethane, anhydride, polyester and combinations thereof. The covalent network polymers disclosed herein are advantageously made by anhydrous reactions, which enables the highest known glass transition temperatures to date for this class of materials. Further, the disclosed covalent network polymers can be formed in continuous processes, such as additive manufacturing processes that produce three-dimensional objects or roll-to-roll processes that produce covalent network polymer films or fully cured prepreg in various size formats.

The present invention generally relates to covalent network polymers prepared from an imine-linked oligomer and an independent crosslinker comprising reactive moieties selected from the group consisting of epoxy, isocyanate, bismaleimide, sulfide, polyurethane, anhydride, polyester and combinations thereof. The covalent network polymers disclosed herein are advantageously made by anhydrous reactions, which enables the highest known glass transition temperatures to date for this class of materials. Further, the disclosed covalent network polymers can be formed in continuous processes, such as additive manufacturing processes that produce three-dimensional objects or roll-to-roll processes that produce covalent network polymer films or fully cured prepreg in various size formats.

A stabilised aqueous formazin composition comprises 100 parts by weight water; up to 0.03 parts by weight formazin polymer; 0.4 to 5 parts by weight hexamethylenetetramine; and a buffer composition, wherein the buffer composition is adjusted to maintain a pH of the formazin solution in a range between 8.4 and 10. The stabilised formazin composition has a turbidity of 400 NTU or less. A diluent for preparing the stabilised formazin composition from a formazin stock composition is provided, wherein the diluent comprises hexamethylenetetramine in a concentration of between 4 and 50 g/l and a buffer composition adjusted to a pH of the diluent in a range of from 8.4 to 10.

Chemical compositions are provided having a structure in accordance with ##STR00001##
with the R group having a structure in accordance with ##STR00002##
R.sup.1 includes an alkyl group, R.sup.2 includes an alkylene group, and R.sup.3 includes an alkylene group in accordance with (CH.sub.2), with x2, and R.sup.4 includes the structure of Formula (II) or Formula (III). R.sup.5 includes a meta-substituted or para-substituted phenyl moiety. Additionally, elastomers produced by cross-linking the chemical composition of Formula (I) are provided.

Chemical compositions are provided having a structure in accordance with ##STR00001##
with the R group having a structure in accordance with ##STR00002##
R.sup.1 includes an alkyl group, R.sup.2 includes an alkylene group, and R.sup.3 includes an alkylene group in accordance with (CH.sub.2), with x2, and R.sup.4 includes the structure of Formula (II) or Formula (III). R.sup.5 includes a meta-substituted or para-substituted phenyl moiety. Additionally, elastomers produced by cross-linking the chemical composition of Formula (I) are provided.

Disclosed is a paint composition containing graphene oxide for preventing corrosion of a structure and improving water repellency, corrosion proof and long-term durability of a concrete structure. The paint composition includes a powder mixture containing 0.2 to 1.0 weight % of zinc (Zn), 0.02 to 0.3 weight % of graphene oxide, 0.06 to 0.11 weight % of phosphorus, and a remaining amount of aluminum (Al); and an adhesive resin in which the powder mixture is uniformly dispersed.

An elastomer, a process for forming an elastomer, and an article of manufacture are disclosed. The elastomer comprises a phosphazene backbone and at least one polyhexahydrotriazine component. The process for forming the elastomer includes obtaining an amine-terminated cyclotriphosphazene, reacting it with a diamine to form a phosphazene-containing PHT polymer, and then reacting the phosphazene-containing PHT polymer with a side-chain modified cyclic phosphazene to form a PCPHT elastomer with halogen ligands. The PCPHT elastomer with halogen ligands is then reacted with an alkoxide to form a PCPHT elastomer with at least one ether-linked side chain. The article of manufacture comprises a material comprising an elastomer having a phosphazene backbone and at least one PHT component.