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  • Phthalic Anhydride
  • Unsaturated, thermosetting, brominated phthalic anhydride/polyol polyester resins are prepared by reacting brominated phthalic anhydride with polyol and an unsaturated polycarboxylic acid compound in the presence of an acid neutralizing agent under reaction conditions so as to form an unsaturated polyester. (google.com)
  • 2. The process according to claim 1 wherein said mole ratio of total moles of polyol to the sum of the moles of brominated phthalic anhydride, unsaturated polycarboxylic acid compound and any saturated polycarboxylic acid compounds ranges from about 5:4 to about 7:4. (google.com)
  • 12. The process according to claim 1 wherein said brominated phthalic anhydride is tetrabromophthalic anhydride which contains from about 0.05 to 1.0 weight percent of sulfuric acid and/or SO 3 impurities, the amount of acid neutralizing agent present is at least sufficient to neutralize said impurities, and said tetrabromophthalic anhydride is added to the reaction at a temperature of from ambient to about 200 C. (google.com)
  • 14. The process according to claim 1 wherein an amount of neutralizing agent which is at least sufficient to neutralize the acid and/or acid producing species entrapped in the brominated phthalic anhydride is present. (google.com)
  • 15. The process according to claim 1 wherein the brominated phthalic anhydride is reacted with said polyol at an elevated temperature prior to adding the unsaturated polycarboxylic acid compound to the reaction. (google.com)
  • polymer
  • 3. Thioic acids according to claim 2 whereby R2 is chosen from a degradable oligomer or polymer selected from the group of oligo-or poly(lactide) (PLLA), oligo-or polyglycolide (PGA), fico-oligomers or copolymers of lactic acid and glycolic acid, oligo-or poly(anhydrides), oligo-or poly(trimethylenecarbonates), oligo-or poly(orthoesters), oligo-or poly(dioxanones), oligo-or poly(c-caprolactones) (PCL), oligo-or polyesteramides. (freepatentsonline.com)
  • However, for later use in cleaners and detergents, clear (meaning polymer-free) and less dark colored alkenyl succinic anhydride (ASA) were needed. (wikipedia.org)
  • chain
  • In living organisms, succinic acid takes the form of an anion, succinate, which has multiple biological roles as a metabolic intermediate being converted into fumarate by the enzyme succinate dehydrogenase in complex 2 of the electron transport chain which is involved in making ATP, and as a signaling molecule reflecting the cellular metabolic state. (wikipedia.org)
  • A total of 26 minor acids (from 2 in pecan to 8% in peanut) were determined: 8 species derived from succinic acid, likely in relation with photosynthesis, and 18 species with a chain from 5 to 22 carbon atoms. (wikipedia.org)
  • food
  • As a food additive and dietary supplement, succinic acid is generally recognized as safe by the U.S. Food and Drug Administration. (wikipedia.org)
  • terms
  • In terms of their mode of action, the anhydride is proposed to react with the hydroxyl groups on the cellulose, forming an ester. (wikipedia.org)