Abrégé

A polyurethane composition characterized by containing a polyurethane, a phenolic antioxidant, a hindered amine light stabilizer (excluding polyester compound) and a polyester compound (excluding polyurethane). Preferably, a benzotriazole light stabilizer is further contained therein. The polyurethane composition is highly resistant to yellowing deterioration and other quality deterioration attributed to heat and light, such as sunlight, and nitrogen oxides, such as oxidized nitrogen gas. Accordingly, this polyurethane composition finds application in fibers, films, foams, paints and adhesives, in particular, glass substitutes, surface coating materials for pane, etc., interior/exterior materials and interior/exterior paints for building and transportation equipment, members for light source, electromagnetic wave shielding members, containers and packing materials for chemical, etc., film materials for agricultural sheet, etc., antifading agents for print, etc., apparel fiber products and fibers, household interior items, contact lens and other medical instruments, optical supplies, stationery, sign boards and surface coating materials therefor, etc.

Classes IPC  ?

• C08L 75/04 - Polyuréthanes
• C08K 5/13 - PhénolsPhénolates
• C08K 5/3475 - Cycles à cinq chaînons condensés avec des carbocycles
• C08L 67/00 - Compositions contenant des polyesters obtenus par des réactions créant une liaison ester carboxylique dans la chaîne principaleCompositions contenant des dérivés de tels polymères

Abrégé

The present invention is directed to a product, obtainable by reacting a SiOy flake, or a material comprising a SiOy layer with 0.70 ≤ y ≤ 1.95, especially 0.70 ≤ y ≤1.80, very especially 1.0 ≤ y ≤ 1.8 with a protic substance, such as water, or a protic organic solvent to generate Si-H, Si-H2 and/or a-Si:H groups and reacting the obtained intermediate with a compound having functional groups that can react with Si-H, Si-H2 and/or a-Si:H groups and a process for their production. By using the Si-H group as anchor on the surface for organic compounds hazardous reducing agents like lithium aluminum hydride, borane or hydrogen can be avoided for reductive grafting methods. Organic and inorganic compounds, such as, for example, colorants, or additives, such as, for example, UV absorbers, or photoinitiators, or polymers can immobilized. The modified flakes can be used in coatings, plastics, fibres etc.

Classes IPC  ?

• C09C 1/00 - Traitement de substances inorganiques particulières, autres que des charges fibreuses Préparation du noir de carbone

Abrégé

A method for laser marking a substrate which method comprises exposing a composition comprising a tetrabenzodiazadiketoperylene pigment to laser radiation or heat to produce a fluorescent marking readily apparent under UV light is disclosed. This method can yield fluorescent markings which are not readily apparent under ambient light. A method for producing non-fluorescent marks on substrates containing fluorescent tetrabenzodiazadiketoperylene dyes by laser exposure is also disclosed.

Classes IPC  ?

• C09B 3/16 - Préparation par synthèse du noyau
• C09B 67/20 - Préparations à base de pigments organiques
• C09K 11/06 - Substances luminescentes, p. ex. électroluminescentes, chimiluminescentes contenant des substances organiques luminescentes