摘要:
The present invention aims to provide a method of producing a hydrophilic modified polyrotaxane, which enables production of a hydrophilic modified polyrotaxane excellent in storage stability in an industrially advantageous way. The present invention provides a method of producing a hydrophilic modified polyrotaxane, comprising: a hydrophilic modification step of preparing a solution of a hydrophilic modified polyrotaxane by modifying all or part of hydroxy groups on a cyclodextrin of a polyrotaxane with hydrophilic modifying groups, the polyrotaxane containing the cyclodextrin, a polyethylene glycol included in the cavities of the cyclodextrin molecules in a skewered manner, and a capping group that is placed at each end of the polyethylene glycol and prevents dissociation of the cyclodextrin molecules from the polyethylene glycol; and a drying step in which the prepared solution of the hydrophilic modified polyrotaxane is formed into a thin film state and dried.
摘要:
There is provided a curable aqueous overcoating composition containing 1 to 90 mass % of hydrophilic polyrotaxane with respect to the coating film forming component, where the hydrophilic polyrotaxane has a cyclic molecule, a linear molecule included in the cyclic molecule in a skewered manner and blocking groups arranged on opposite ends of the linear molecule to prevent elimination of the cyclic molecule from the linear molecule and at least one of the linear molecule and the cyclic molecule has a hydrophilic modifying group.
摘要:
Onium-modified polymers, such as polyethers and alkylimidazolium-modified polymers are provided. The polymers have desirable properties such as moisture absorbing capability, low volatile organic compounds (VOCs) emission, and enhanced electrical conductivity. A method to prepare the polymers is also provided, in which green solvents such as ionic liquids are utilized as both reaction media and reactants.
摘要:
Substantially non-antigenic polymers containing pI and/or pH optimum modulating moieties are disclosed. The polymers are useful as intermediates for synthesis of amine-based polymers and in the formation of activated polymers for conjugation with nucleophiles. Conjugates and methods of preparation and treatment with the conjugates are also disclosed.
摘要:
Fuel compositions for internal combustion engines are provided which contain deposit control additives which maintain cleanliness of intake systems without contributing to combustion chamber deposits. The additives are polyloxyalkylene carbamates comprising a hydroxy- or hydrocarbyloxy-terminated polyloxyalkylene chain of 2-5 carbon oxyalkylene units bonded through an oxycarbonyl group to a nitrogen atom of a polyamine having from 2 to 10 amine nitrogens and from 2 to 40 carbons with a carbon:nitrogen ratio between about 1:1 and 10:1.
摘要:
The invention relates to novel polyglycerol based UV-filters as well as to topical compositions comprising such novel polyglycerol based UV-filters. Furthermore, the invention relates to the use of such novel polyglycerol based UV-filters to enhance the solubility of butyl methoxydibenzoylmethane or bis-ethylhexyloxyphenol methoxyphenyl triazine in cosmetic oils.
摘要:
The present invention aims to provide a method of producing a powdered hydrophilic modified polyrotaxane, which enables production of a powdered hydrophilic modified polyrotaxane excellent in storage stability in an industrially advantageous way. The present invention provides a method of producing a powdered hydrophilic modified polyrotaxane, comprising: a hydrophilic modification step of preparing a solution of a hydrophilic modified polyrotaxane by modifying all or part of hydroxy groups on a cyclodextrin of a polyrotaxane with hydrophilic modifying groups, the polyrotaxane containing the cyclodextrin, a polyethylene glycol included in the cavities of the cyclodextrin molecules in a skewered manner, and a capping group that is placed at each end of the polyethylene glycol and prevents dissociation of the cyclodextrin molecules from the polyethylene glycol; and a drying step of spraying the prepared solution of the hydrophilic modified polyrotaxane and drying the solution of the hydrophilic modified polyrotaxane in a heated gas stream.
摘要:
The present invention aims to provide a hydrophilic modified polyrotaxane composition having excellent storage stability. The present invention relates to a hydrophilic modified polyrotaxane composition comprising: a hydrophilic modified polyrotaxane produced by modifying, with hydrophilic modifying groups, all or part of hydroxy groups on a cyclodextrin of a polyrotaxane containing the cyclodextrin, a polyethylene glycol which is included in the cavities of the cyclodextrin molecules in a skewered manner, and a capping group that is placed at each end of the polyethylene glycol and prevents dissociation of the cyclodextrin molecules from the polyethylene glycol; and a polyphenol antioxidant.