The present invention discloses novel flame retardant aqueous formulations comprising micronized particles of brominated epoxy polymers having a predetermined molecular weight, their use as flame retardant coating of wood-based substrates, their preparation and flame-retarded wood-based substrates prepared by using them.

A heterofunctional poly(alkyleneoxide) according to the invention contains a first polymer terminus containing a protected, unprotected, or derivatized amine or aminoalkyl functionality and a second polymer terminus containing an unsaturated functionality. Reaction products, derivatives, and methods of making these materials are also described.

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).

A method for preparing a polyether polyol in a continuous reaction cycle is described. In the method, a low molecular-weight alcohol is polymerized with an alkylene oxide to obtain a low molecular-weight polymer. The low molecular-weight polymer is used as an initiator to react with the alkylene oxide and the low molecular-weight alcohol in the presence of a DMC catalyst and an acid promoter to obtain an intermediate-target polymer. A portion of the intermediate-target polymer is used for producing the target polymer, and the other portion is recycled for reproduction of the intermediate-target polymer. No initiator prepared with a base catalyst is used, and thus the loss of material and the discharge of residue and waste water are reduced. The DMC concentration is kept constant in the target polymer during the production such that the dewatering time and induction time are greatly reduced.

A method for producing a narrowly distributed and high-purity polyalkylene glycol derivative having an amino group at an end, a polymerization initiator for use in the method, and a precursor of the polymerization initiator are provided. The present invention provides: a method for producing a polyalkylene glycol derivative having an amino group at an end, using, as a polymerization initiator, a compound represented by the general formula (I); a compound represented by the following general formula (I); and a precursor thereof: ##STR00001## wherein R.sub.A.sup.1a and R.sub.A.sup.1b each independently represent a protective group of the amino group, or one of R.sub.A.sup.1a and R.sub.A.sup.1b represents H and the other represents a protective group of the amino group, or R.sub.A.sup.1a and R.sub.A.sup.1b bind to each other to represent a cyclic protective group forming a ring; R.sub.A.sup.2 represents a linear, branched, or cyclic hydrocarbon group having 1 to 6 carbon atoms; R.sub.A.sup.3 represents a single bond, or a linear, branched, or cyclic hydrocarbon group having 1 to 20 carbon atoms, and the hydrocarbon group may contain a heteroatom; the total number of carbon atoms (or the total number of carbon atoms and heteroatoms) of R.sub.A.sup.2 and R.sub.A.sup.3 is 4 or more; and M represents an alkali metal.

The disclosure relates to the battery field and a PEO film, a preparation method thereof, and a solid-state battery are provided. A molecular structure of the PEO film includes a structural unit B, and the structural unit B includes CH?CHO.

Poly(cyclic acetal)s, methods of making same, and uses of same. The poly(cyclic acetal)s may have a number average molecular weight (Mn) of 10 to 3000 kiloDaltons (kDa) and over 50% of the chain ends may exclude hydroxyl groups. The poly(cyclic acetal) may be a homopolymer or copolymer(s) of poly(1,3-dioxolane) (PDXL). The poly(cyclic acetal)s may have one or more or all of: a thermal stability (Td,5%) of 337? C. to 392? C.; a thermal stability of (Td.50%) of 377? C. to 462? C.; or an Arrhenius activation energy (Ea) of 85.0 kJ/mol with 2 mol % of strong acid (e.g., pKa less than or equal to 4). Methods of polymerizing poly(cyclic acetal)s may comprise reacting cyclic acetal monomers with either Lewis acid catalysts and haloalkyl ether initiators or organic cation salt catalyst(s) and proton traps. Methods of chemically recycling poly(cyclic acetal)s into cyclic acetals may react poly(cyclic acetal)s with strong acids.

Disclosed are a novel monofunctional polyethylene glycol (PEG) and derivatives thereof. More particularly, one terminal of each of the monofunctional polyethylene glycol and derivatives thereof is modified with a siloxy group. The novel monofunctional polyethylene glycol (PEG) offers an alternative to methoxy polyethylene glycol.

Copolymers and methods of making the same. The copolymers are 1,3-Dioxolane copolymers of the general formula I where x1+x2 has values of 10 to 2000. Where R.sup.1 and R.sup.2 are hydrogen radicals or C.sub.1 to C.sub.18 alkyl radical. In each case at least one radical R.sup.1 or R.sup.2 in the units [OCH.sub.2OCHR.sup.1CHR.sup.2-].sub.y1 and [OCHR.sup.1CHR.sup.2OCH.sub.2-].sub.y2 is a C.sub.1 to Cis alkyl radical. Where y1+y2 has values of 3*(x1+x2+y1+y2)/100 to 50*(x1+x2+y1+y2)/100.

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.