摘要:
the invention relates to photopolymerizable polymeric compositions useful as coating and moldable compositions which are hardenable by ultraviolet radiation. These coating and moldable compositions comprise mixtures of photopolymerizable or photocrosslinkable acrylates of bis-(hydroxyalkyl) terephthalates and isophthalates in combination with at least one ethylenically unsaturated monomer component and a photoinitiator.
摘要:
The invention relates to photopolymerizable polymeric compositions useful as coating and moldable compositions which are hardenable by ultraviolet radiation. These coating and moldable compositions comprise mixtures of photopolymerizable or photocrosslinkable unsaturated compounds and at least one photoinitiator selected from the group consisting of haloalkyl carboalkoxy substituted aromatic ketones.
摘要:
The invention relates to photopolymerizable polymeric compositions useful as coating and moldable compositions which are hardenable by ultraviolet radiation. These coating and moldable compositions comprise mixtures of photopolymerizable or photocrosslinkable unsaturated compounds and at least one photoinitiator selected from the group consisting of halo-alkyl substituted aromatic ketones.
摘要:
The present invention provides a novel linear amorphous aromatic polyester comprising units derived from (i) terephthalic acid, (ii) 1,2-propanediol or mixtures of 1,2-propanediol with up to 20 mole percent of ethylene glycol, based upon the total of 1,2-propanediol and ethylene glycol, and (iii) about 5 to 30 mole percent, based upon the total of (i), (ii), and (iii), of a glycol which contains a tertiary amine group, the amine containing glycol having a specified structure and the polyester having an inherent viscosity of about 0.05 to 0.5 dl/g when measured in 60:40 phenol:tetrachloroethane at a concentration of 0.5 g/100 ml at 25.degree. C. The novel polyester is useful as a crosslinking resin and as a photoinitiator for UV curable coating and ink compositions.Also provided is a specified ultraviolet radiation curable coating composition. The composition comprises a mixture ofA. about 4.5 to 49.5% by weight of the novel amine-modified polyester described above;B. about 50 to 95 percent by weight of a photopolymerizable or photocrosslinkable ethylenically unsaturated compound; andC. about 0.5 to 25 percent by weight of a photoinitiator.The photoinitiator is selected from the group consisting of benzil, lower alkyl substituted benzil, benzoin ethers, haloalkyl ketones, aromatic ketones, lower alkyl substituted aromatic ketones, aromatic ketones in combination with amines, and mixtures thereof. The ethylenically unsaturated compound is most preferably selected from the group consisting of glycidyl acrylate, glycidyl methacrylate, methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, and mixtures thereof. The coating composition provided by the present invention gives clear insoluble coatings which are useful as protective and/or decorative coatings.
摘要:
Novel radiation-curable coating compositions comprising curable cellulose esters dissolved in unsaturated monomer and containing a photoinitiator. In particular, the cellulose ester contains a .beta.-alkyl amino or .beta.-arylamino carboxylate moiety. Exposure of these compositions to ultraviolet radiation in the presence of ketonic photoinitiators gives clear insoluble coatings which are useful as protective coatings for substrates such as wood, glass, aluminum, and steel.
摘要:
The invention relates to photopolymerizable polymeric compositions useful as coating and moldable compositions which are hardenable by ultraviolet radiation. These coating and moldable compositions comprise mixtures of photopolymerizable or photocrosslinkable unsaturated compounds and at least one photoinitiator selected from the group consisting of halogenated heterocyclic compounds having at least one diazole or triazole group and at least one benzyl halide group.
摘要:
A novel process for producing 2-chloro-1,3-diketo compounds of the formula ##STR1## wherein Q is an amino, substituted amino or hydrocarbyloxy group, e.g., --OCH.sub.3, wherein the 1,3-diketo precursor in solution in a low boiling alcohol is neulized in a special chlorinator with chlorine or a mixture of nitrogen and chlorine, and wherein the chlorination of the nebulized precursor solution takes place extremely rapidly at relatively high temperatures in a chlorination zone, the product being recovered by condensation on the cooled chlorinator walls and stripping of the alcohol solvent. A representative product is 2-chloro-N,N-dimethylacetoacetamide (2CDMAA), a useful intermediate for the production of insecticides, drugs, dyes and other complex compounds.
摘要:
Disclosed is a process and apparatus for the chlorination of diketene, by contacting the diketene in nebulized form with chlorine gas, which contacting can be in the absence of a solvent or diluent, in an essentially uncooled reaction zone of short residence time followed by a cooling zone wherein at least a portion of the heat of reaction is removed from the product without the need for refrigeration.
摘要:
The present invention provides a novel process for preparing specified amorphous polycarbonate polyols. The process comprises reacting phosgene, a branched-chain polyhydric alcohol, and a straight chain polyhydric alcohol in the presence of a solvent and in the absence of a catalyst at a temperature of about 60.degree. to 100.degree. C., and then contacting the amorphous polycarbonate product in the reaction mixture with a catalytic amount of a tertiary amine at reflux temperature for a period of time of at least about 30 minutes. The straight chain polyhydric alcohol is employed in an amount of about 3 to 40 mole percent, based upon the total amount of polyhydric alcohol present in the reaction system. A preferred branched-chain polyhydric alcohol is neopentyl glycol, and a preferred straight chain polyhydric alcohol is 1,6-hexanediol. Preferred solvents are xylene and toluene, and preferred tertiary amines are triethylamine and pyridine.
摘要:
Disclosed are TiO.sub.2 pigments treated to decrease their photosensitizing propensity and their tendency to degrade polymeric materials. Commercial TiO.sub.2 pigments, both anatase and rutile, treated according to the present invention with manganous, cobaltous or cerous salts, particularly acetate, are effectively desensitized.