The invention relates to the field of preparing biodegradable polymer slow/controlled release composite, in particular to a biodegradable polymer slow/controlled release binary composite urea-formaldehyde/poly(butylene succinate) and a biodegradable polymer slow/controlled release ternary nanocomposite urea-formaldehyde/poly(butylene succinate)/potassium dihydrogen phosphate. The following steps are included: uniformly mixing two components poly(butylene succinate) and methylol-urea or three components poly(butylene succinate), methylol-urea and potassium dihydrogen phosphate, and then extruding the resulting mixture by an extruder, and the biodegradable polymer slow/controlled release composite urea-formaldehyde/poly(butylene succinate) containing nutrient N and the biodegradable polymer slow/controlled release nanocomposite urea-formaldehyde/poly(butylene succinate)/potassium dihydrogen phosphate containing nutrients of N, P and K are obtained respectively. As one of the raw materials, methylol-urea, the precursor of urea-formaldehyde, can react by way of melt polycondensation to form urea-formaldehyde macromolecular chains with different polymerization degrees at high temperature in the extruder, which are dispersed among the PBS macromolecular chains, thereby obtaining the composite UF/PBS of the present invention; and the hindering effect of the molecular segments of urea-formaldehyde and poly(butylene succinate) and the hydrogen bond interaction between the components result in that potassium dihydrogen phosphate crystals dissolved in the water produced by the polycondensation reaction are restricted to nanoscale during their precipitation process, so as to prepare nanocomposite UF/PBS/MKP. The prepared composites all have excellent mechanical properties, and can be directly used as a biodegradable polymer slow/controlled release fertilizer, or as a matrix polymer to prepare other types of slow release fertilizers, and the formulae with high PBS contents can also replace PBS to prepare other agricultural implements, such as agricultural films, nursery pots and vegetation nets.

The invention relates to the field of preparing biodegradable polymer slow/controlled release composite, in particular to a biodegradable polymer slow/controlled release binary composite urea-formaldehyde/poly(butylene succinate) and a biodegradable polymer slow/controlled release ternary nanocomposite urea-formaldehyde/poly(butylene succinate)/potassium dihydrogen phosphate. The following steps are included: uniformly mixing two components poly(butylene succinate) and methylol-urea or three components poly(butylene succinate), methylol-urea and potassium dihydrogen phosphate, and then extruding the resulting mixture by an extruder, and the biodegradable polymer slow/controlled release composite urea-formaldehyde/poly(butylene succinate) containing nutrient N and the biodegradable polymer slow/controlled release nanocomposite urea-formaldehyde/poly(butylene succinate)/potassium dihydrogen phosphate containing nutrients of N, P and K are obtained respectively. As one of the raw materials, methylol-urea, the precursor of urea-formaldehyde, can react by way of melt polycondensation to form urea-formaldehyde macromolecular chains with different polymerization degrees at high temperature in the extruder, which are dispersed among the PBS macromolecular chains, thereby obtaining the composite UF/PBS of the present invention; and the hindering effect of the molecular segments of urea-formaldehyde and poly(butylene succinate) and the hydrogen bond interaction between the components result in that potassium dihydrogen phosphate crystals dissolved in the water produced by the polycondensation reaction are restricted to nanoscale during their precipitation process, so as to prepare nanocomposite UF/PBS/MKP. The prepared composites all have excellent mechanical properties, and can be directly used as a biodegradable polymer slow/controlled release fertilizer, or as a matrix polymer to prepare other types of slow release fertilizers, and the formulae with high PBS contents can also replace PBS to prepare other agricultural implements, such as agricultural films, nursery pots and vegetation nets.

The objective of the present invention is to provide a method for producing a fluorinated carbonate derivative in a safe and efficient manner. The method for producing a fluorinated carbonate derivative according to the present invention is characterized in comprising irradiating light on a composition containing a C.sub.1-4 halogenated hydrocarbon having one or more kinds of halogen atoms selected from the group consisting of a chlorine atom, a bromine atom and an iodine atom, a fluorine-containing compound having a nucleophilic functional group and a base in the presence of oxygen.

The objective of the present invention is to provide a method for producing a fluorinated carbonate derivative in a safe and efficient manner. The method for producing a fluorinated carbonate derivative according to the present invention is characterized in comprising irradiating light on a composition containing a C.sub.1-4 halogenated hydrocarbon having one or more kinds of halogen atoms selected from the group consisting of a chlorine atom, a bromine atom and an iodine atom, a fluorine-containing compound having a nucleophilic functional group and a base in the presence of oxygen.

Disclosed are poly(ester urea)s containing two or more units containing two amino acid monomers linked by a linker. At least two units of the poly(ester urea)s are covalently bonded via a urea bond. Suitable amino acid monomers are lysine, arginine, aspartic acid, phenylalanine, or a side chain protected derivative thereof, and suitable linkers are selected from a 1,4-butane diol group, a 1,6-hexane diol group, diethylene glycol group, a triethylene glycol group, or an N-methyl diethanolamine group. The poly(ester urea)s are used to form polyplexes for the improved complexation and delivery of drugs to a subject in need thereof.

Disclosed are poly(ester urea)s containing two or more units containing two amino acid monomers linked by a linker. At least two units of the poly(ester urea)s are covalently bonded via a urea bond. Suitable amino acid monomers are lysine, arginine, aspartic acid, phenylalanine, or a side chain protected derivative thereof, and suitable linkers are selected from a 1,4-butane diol group, a 1,6-hexane diol group, diethylene glycol group, a triethylene glycol group, or an N-methyl diethanolamine group. The poly(ester urea)s are used to form polyplexes for the improved complexation and delivery of drugs to a subject in need thereof.

External thermal insulation composite systems described herein include a concrete or masonry wall and a multilayer thermal insulation board disposed on the concrete or masonry wall. The multilayer thermal insulation board includes at least one closed cell foam layer comprising polyurethane and polyisocyanurate having an open cell volume of less than 20% by volume according to ASTM D 6226 and at least one open cell foam layer comprising polyurethane and polyisocyanurate having an open cell volume of greater than 80% by volume according to ASTM D 6226.

The invention relates to the field of antimicrobial materials, in particular to implantable and other medical devices, exhibiting antimicrobial activity. Provided is a method for providing a substrate with an antimicrobial coating comprising providing a substrate that is coated with a polyamine-functionalized polymer, and contacting said polyamine-functionalized polymer with an aqueous salt solution comprising at least one salt having a polarizability α.sub.37 at least 4 Å.sup.3 determined at 37° C. The salt solution may comprise one or more of NaI, KI, NaBr, KBr, NaClO.sub.4, KClO.sub.4, Na.sub.2SO.sub.4, K.sub.2SO.sub.4, Na.sub.3PO.sub.4, K.sub.3PO.sub.4, Mg(NO.sub.3).sub.2, Ca(NO.sub.3).sub.2, (NH.sub.4).sub.2SO.sub.4, NH.sub.4NO.sub.3, MgSO.sub.4, CaSO.sub.4, and Al(NO.sub.3).sub.3.

The invention is directed to a crosslinkable flame-retardant coating composition comprising the following components: a) a dendritic polymer having hydroxyl groups, wherein the dendritic polymer has a hydroxyl number in the range of 80 to 800, b) a polyol having at least 3 hydroxyl groups, c) an ammonium polyphosphate compound, d) a base coat polymer selected from a polycarbamate resin or a polymer bearing carboxyl groups, and e) a crosslinker for crosslinking the base coat polymer selected from a compound having two or more aldehyde groups, acetals or hemiacetals of the aldehydes, or a polycarbodiimide.

Such a cross-linkable flame-retardant coating composition improves the overall appearance of the cross-linked base coating on a substrate and also imparts improved flame-retardancy.

The invention is directed to a crosslinkable flame-retardant coating composition comprising the following components: a) a dendritic polymer having hydroxyl groups, wherein the dendritic polymer has a hydroxyl number in the range of 80 to 800, b) a polyol having at least 3 hydroxyl groups, c) an ammonium polyphosphate compound, d) a base coat polymer selected from a polycarbamate resin or a polymer bearing carboxyl groups, and e) a crosslinker for crosslinking the base coat polymer selected from a compound having two or more aldehyde groups, acetals or hemiacetals of the aldehydes, or a polycarbodiimide.

Such a cross-linkable flame-retardant coating composition improves the overall appearance of the cross-linked base coating on a substrate and also imparts improved flame-retardancy.