摘要:
A process for the preparation of a dispersion, comprising: dispersing a composition comprising a particulate solid, a liquid medium and a dispersant; wherein the dispersant is obtained by a process comprising at least the steps a) and b): a) co-polymerising a monomer composition comprising at least the components i) and ii) so as to form a phospho-ester functional polymer: i) a monomer having at least one phospho-ester group and two groups independently selected from hydroxyl, amino, thiol and hydrazo groups, ii) a diisocyanate; and b) hydrolysing at least some of the phospho-ester groups in the phospho-ester functional polymer so as to result in a dispersant having phosphorus containing anionic groups.
摘要:
A compound that is a polymerization product of a compound composition that contains a diisocyanate-based compound and an aromatic polyol, a composition that contains the compound and an interpenetration polymer, a fuel cell electrode including either the compound or the composition, a fuel cell electrolyte membrane including either the compound or the composition, and a fuel cell including at least one selected from the group consisting of the fuel cell electrode and the fuel cell electrolyte membrane.
摘要:
Disclosed are oligomeric phosphonates including oligophosphonates, random or block co-oligo(phosphonate ester)s and co-oligo(phosphonate carbonate)s produced using a condensation process terminated with hydroxyl, epoxy, vinyl, vinyl ester, isopropenyl, isocyanate groups, and the like. These materials can be used as a reactive additive to other polymers, oligomers or monomer mixtures to impart flame resistance without diminishing melt processability which is important in the fabrication of polymers for many applications.
摘要:
The invention relates to ethylene diphosphinic acids and salts thereof of general formula A-P(O)(OX)—CR1R2—CR3R4—P(O)(OX)-A, in which A, H and/or CR5R6—OH,R1,R2,R3,R4,R5,R6 are the same or different, and denote independently from each other H, C1-C20 alkyl, C6-C20 aryl and or C6-C20 aralkyl, and X denotes H, an alkali metal, an element of the second main and secondary group, an element of the third main and secondary group, an element of the fourth main and secondary group, an element of the fifth main and secondary group, an element of the sixth secondary group, an element of the seventh secondary group, an element of the eight secondary group and/or a nitrogen base. Also disclosed are a method for producing same and the use thereof.
摘要:
The present invention relates to a multi-stage process for the continuous preparation of thermoplastically processable polyurethanes with improved processing properties based on various polyols.
摘要:
Biocompatible and biodegradable poly(phosphoester-urethanes), compositions comprising the poly(phosphoester-urethanes), and methods of use as a drug delivery device and an implant.
摘要:
Reaction of halides of alkyl and aryl phosphonic acids of the formula RP(O)X.sub.2, where R is an C.sub.1 -C.sub.20 alkyl or aryl, e.g., phenyl, group or a halo- substituted C.sub.1 -C.sub.20 alkyl group or aryl group, e.g., phenyl, and an epoxy group containing alcohol of the formula ##STR1## where n is an integer from 1 to 8, e.g., glycidol, give a compound having the formula ##STR2## where R and n are as defined above which can be used as a flame retardant in polyurethane foams.
摘要:
Reaction of halides of alkyl and aryl phosphonic acids of the formula RP(O)X.sub.2, where R is an C.sub.1 -C.sub.20 alkyl or aryl, e.g., phenyl, group or a halo- substituted C.sub.1 -C.sub.20 alkyl group or aryl group, e.g., phenyl, and an epoxy group containing alcohol of the formula ##EQU1## where n is an integer from 1 to 8, e.g., glycidol, give a compound having the formula ##EQU2## where R and n are as defined above which can be used as a flame retardant in polyurethane foams.
摘要:
A process is provided for the catalytic preparation of tertiary methylphosphine oxides which comprises mixing hydroxymethylalkylphosphines with at least 1 weight % of carbon tetrachloride or carbon tetrabromide at a temperature of from -10* to +120*C, and, after the reaction is complete, isolating the tertiary methylphosphine oxide by distilling off the carbon tetrahalide.