摘要:
A brominated unsaturated polyester resin containing a hydroxyl value of about 35 or less and a hydroxyl:acid molar ratio of about 2:1 to about 1:4. The brominated unsaturated polyester resin is prepared from a polyfunctional carboxylic acid, a monocarboxylic acid, and a polyfunctional glycol or alcohol that contains bromine under polyester esterification reaction conditions. The brominated unsaturated polyester resin can be incorporated into a resin composition that also contains vinyl monomer. The invention is also directed to a method of making a brominated unsaturated polyester resin, and to castings, coatings, and laminate panels containing cured brominated unsaturated polyester resin compositions of the invention.
摘要:
Electroluminescent devices have, as the active layer, a polymer having a chain comprising a plurality of electroluminescent groupings, adjacent pairs of the electroluminescent groupings being connected via two benzene rings linked by only a single covalent bond, at least one of the benzene rings bearing, at a position ortho to the covalent bond, a substituent of sufficient size that the two benzene rings are essentially not conjugated with each other. Preferred electroluminescent groupings comprise a chain of three or more para-phenylene groups connected to one another by amide, carboxy, ester, urea, urethane or vinyl groups. The polymers have a fixed conjugation length with predictable electroluminescent properties.
摘要:
A halogen-containing unsaturated alkyd is synthesized by reacting a monobasic carboxylic acid and/or monohydric alcohol containing a post-halogenatable carbon-to-carbon double bond with an unsaturated polybasic carboxylic acid and a polyhydric alcohol and post-halogenating the resulting unsaturated alkyd. A flame-retardant unsaturated polyester resin composition comprising said halogen-containing unsaturated alkyd may be used for fabricating various shaped articles such as fame-retarded electrical laminates.
摘要:
A fire retardant polyester composition is derived by inter- polymerisation from a system comprising a reactive adduct of hexachlorocyclopentadiene with maleic acid or anhydride, a polyhydric alcohol, a carboxylic acid or anhydride containing aliphatic carbon-to-carbon unsaturation, a styrence-type monomer, and a copolymerizable brominated neopentylacrylate.
摘要:
The flame-retardancy of a polyester composition derived from a reaction product of an adduct of hexahalocyclopentadiene with maleic acid or anhydride, a polyhydric alcohol component and a polycarboxylic acid or acid anhydride component containing aliphatic carbon-to-carbon unsaturation, and a styrene-type monomer, is substantially bolstered by the inclusion therein of finely-divided antimony oxide and/or zinc borate, and a brominated organic compound soluble in styrene.
摘要:
A polyester or polyesteramide capable of forming an anisotropic melt containing residues derived from dicarboxylic acids, dihydric phenols, hydroxyaromatic acids and aminophenols characterised in that at least 10 mole % of the acid residues of the polymer are radicals derived from fumaric acid or a substituted fumaric acid. Preferably at least 10 mole % of the residues other than the residues of fumaric acid or substituted fumaric acid are aromatic ring-substituted residues. The polyester or polyesteramides of the invention are particularly suitable for blending with chlorine-containing polymers at concentrations of up to 25% by weight of the polymer blend to improve the processability of the chlorine-containing polymer. A polyester in which the acid residues are entirely aliphatic is particularly suitable for blending with poly(vinyl chloride).
摘要:
Unsaturated polyesters prepared from an unsaturated dicarboxylic acid, dicyclopentadiene and dibromoneopentyl glycol have lower cost, lower viscosity and other beneficial properties compared to the similar polyesters prepared without the dicyclopentadiene. Improved resin color is obtained by using an aryl sulfonic acid as the esterification catalyst, and upon completion of the reaction, neutralizing the catalyst.