This invention provides a composite type heavy oil demulsifier and its preparation methods. The demulsifier includes two effective constituents. The constituent I is an amino nonionic dendritic polyether and the constituent II is a dendritic ester acid. The structural formula is presented as Formula I and II, respectively. The demulsifier has good abilities in interfacing between oil and water and reducing viscosity. It has good demulsification performance in breaking crude oil emulsion and is useful in heavy crude oil production and petroleum refining.

A curable composition includes a condensation product having a weight average molecular weight of 30,000 or less and a curing agent, the condensation product being obtained by hydrolysis and condensation of a first and second silane compound in the presence of a neutral salt catalyst. The condensation product also has a ratio Y/X of 0.2 or less, wherein X is the number of moles of an OR.sup.3 group directly bonded to silicon atoms of the first and second silane compounds, and Y is the number of moles of an OR.sup.3 group directly bonded to a silicon atom of the condensation product. The first silane compound is represented by R.sup.1(SiR.sup.2.sub.a(OR.sup.3).sub.3-a), and the second silane compound is represented by R.sup.4(SiR.sup.2.sub.a(OR.sup.3).sub.3-a).

Copolymers comprising recurring units of a phenyl glycidyl ether and alkylene oxides are disclosed. Some of the copolymers comprise a di- or polyfunctional nucleophilic initiator and recurring units of the phenyl glycidyl ether and an alkylene oxide. The di- or polyfunctional nucleophilic initiator is an alcohol, phenol, amine, thiol, thiophenol, sulfinic acid, or deprotonated species thereof. Other copolymers comprise a monofunctional nucleophilic initiator selected from thiols, thiophenols, aralkylated phenols, sulfinic acids, secondary amines, C.sub.10-C.sub.20 terpene alcohols, and deprotonated species thereof. Pigments dispersions comprising the copolymers are also disclosed. The copolymers meet the growing needs of the industry with their ease of manufacture, diverse structures, and desirable performance attributes for dispersing a wide range of organic and inorganic pigments. Agricultural applications for the copolymers are also disclosed.

This invention relates to novel macromers prepared from amine based polyols, preformed stabilizers prepared from these macromers, and to polymer polyols prepared from the preformed stabilizers. The present invention also relates to processes for preparing these compositions.

Disclosed herein are novel alkoxylated polyalkylene imines or alkoxylated polyamines having amphiphilic properties. Additionally disclosed herein is a process for preparing such alkoxylated polyalkylene imines or alkoxylated polyamines as well as a method of using such compounds within, for example, cleaning compositions and/or in fabric and home care products. Further disclosed herein are those compositions or products as such.

Disclosed are a preparation method of a phosphorus-nitrogen-silicon-containing polymeric flame retardant and application thereof. The chemical structure of the polymeric flame retardant is

##STR00001##

wherein m=10100, n=10100. The synergistic flame-retardant effect between the phosphorus, nitrogen, and silicon in the phosphorus-nitrogen-silicon-containing polymeric flame retardant increases the flame retardancy of epoxy resin.

A release agent for vulcanized rubber molding is provided which has excellent mold releasing properties and washability. This release agent for vulcanized rubber molding contains an alkylene oxide adduct (A) of an amine compound having 4-8 active hydrogen atoms in the molecule, wherein the aforementioned alkylene oxide adduct (A) of an amine compound has a number average molecular weight of 5000-30000, and contains 50-95 mass % of an oxyethylene group.

A polyether polymer composition containing 200 parts by weight or more of a metal-containing powder per a total of 100 parts by weight of a cationic group-containing low molecular weight polyether polymer composed of 10 to 200 oxirane monomer units, wherein at least a part of the oxirane monomer units is an oxirane monomer unit having a cationic group, and a high molecular weight polyether polymer composed of more than 200 oxirane monomer units is provided.

The invention encompasses hydrogels, monomer precursors of the hydrogels, methods for the preparation thereof, and methods of use therefor. The linking of monomers can take place using non-radical, bioorthogonal reactions such as copper-free click-chemistry.

The invention encompasses hydrogels, monomer precursors of the hydrogels, methods for the preparation thereof, and methods of use therefor. The linking of monomers can take place using non-radical, bioorthogonal reactions such as copper-free click-chemistry.