Patent GB-1497691-A (GB)
Title: Finely-divided polymeric solids having physical propertie
IPC: C08F4/00
Filed: 1975-04-28
Abstract: 1497691 Finely divided polymeric solids BASF WYANDOTTE CORP 28 April 1975 [29 April 1974] 17485/75 Heading C3P A finely-divided solid polymer of (i) a major amount of an ethylenically unsaturated monomer, or mixture of monomers; (ii) a minor amount of a hydroxy-terminated organic compound of 1-8 hydroxyl groups per molecule and an equivalent weight of 500 to 10,000 which contains a polymerizable carbon-to-carbon double bond may be prepared by a process which comprises polymerizing the said components in the presence of a free-radical initiator and an organic solvent which has a boiling point of 25 to 250‹ C. at ambient pressure wherein the mixture optionally contains a chain-transfer agent, preferably an alkyl mercaptan of 1 to 20 carbon atoms in the alkyl radical. Component (i) may be styrene, acrylonitrile, vinylidene chloride, methyl methacrylate, acrylamide and mixtures thereof. Component (ii) is preferably the reaction product of 1-6 moles of an organic compound which has ethylenic unsaturation and a hydroxy, carboxyl or epoxy group (e.g. maleic anhydride) with 1 mole of a hydroxy-containing polyalkylene polyether (e.g. alkylene oxide adduct of 1,1,1-trimethylolpropane, glycerol, propylene glycol and mixtures thereof) wherein the reaction product is reacted with an alkylene oxide to yield a compound of acid number less than 1. In the examples, component (ii) is one of the following: ethylene oxide reacted with the product derived from maleic anhydride and the propylene oxide adduct of glycerlo/propylene glycol (HTOC-I); ethylene oxide reacted with the product of maleic anhydride and ethylene oxide capped with the propylene oxide adduct of 111-trimethylolpropane (HTOC-II); ethylene oxide reacted with propylene oxide/alkyl  glycidyl ether which have been condensed with the propylene oxide adduct of glycerol (HTOC-III); toluene diisocyanate/3 - hydroxy propyl methacrylate product reacted with the ethylene oxide product of propylene oxide adduct of ethylene diamine (HTOC-IV); ethylene oxide reacted with the product of maleic anhydride and a block copolymer from the reaction of ethylene oxide with the propylene oxide adduct of propylene glycol(HTOC-V); propylene oxide reacted with the product from maleic anhydride and the propylene oxide adduct of n-butanol (HTOC VI); propylene oxide reacted with the product from maleic anhydride and the propylene oxide adduct of glycerol (HTOC-VII); maleic anhydride of prolyol of HTOC-II reacted with ethylene oxide (HTOC-VIII). The following polymers are prepared styrene/acrylonitrile with HTOC-I (3-5,8,11,13), HTOC-II (18,21,22, 29,32-42), HTOC-V (27), HTOC-VI (28), HTOC-VII (30), HTOC-VIII (31); styrene with HTOC-I (6,9,12,14-17), HTOC-II (24-25); HTOC-IV (26); methyl methacrylate/vinylidene chloride with HTOC-I (7,10); vinylidene chloride/2 - ethylhexyl acrylate with HTOC-I (19); acrylomide with HTOC-I (20); styrene/acrylonitrile/2-ethylhexyl acrylate with HTOC-I (23). Solvents used are ethanol (3-9,29); isopropanol (16-18, 20,21,24,25,27,28,31); methanol (13,14-19,22, 23,26); t-butanol (15); heptane (30); toluene (32); dimethylformamide (33); carbon tetrachloride (34); tetrahydrofuron (35); diethylene glycol monomethyl ether (36); ethyl acetate (37); acetone (38); 2-nitropropane (39); acetonitrile (40); dimethyl sulphoxide (41); pyridene (42), and the catalysts are azobis (isobutyronitrile) (3-24,26,28-42) and benzoylperoxide (25,27). Comparative examples, wherein (7) HTOC-I and (2) solvent is absent, are given.