摘要:
Improved double metal cyanide (DMC) catalysts are disclosed. The catalysts comprise a DMC compound, an organic complexing agent, from about 0.1 to about 10 wt. % of an organophosphine oxide, and optionally, a polyether. Compared with other DMC catalysts prepared in the absence of the organophosphine oxide, those of the invention have higher activity for epoxide polymerization, and they give polyols having reduced unsaturation even at high epoxide polymerization temperatures.
摘要:
Polymers having an oxetanyl group on the side chain and being represented by the following formula (2) are provided. They are usable for reactions such as ring-opening reaction and addition reaction. The process comprises subjecting to anionic ring-opening polymerization a 3-[(oxiranylmethoxy)methyl]oxetane monomer represented by the following formula (1) alone or together with other monomer containing an epoxy group: wherein A represents a hydrogen atom or an alkyl group of 1-6 carbon atoms, wherein A is the same as above, and R represents a hydrogen atom, a chloromethyl group, straight chain alkyl group or branched chain alkylene group of 1-12 carbon atoms, phenyl group, straight or branched chain alkyloxymethyl group of 1-12 carbon atoms or phenoxymethyl group, and n and m each represent a molar fraction, n being 100-1 mol %, m being 0-99 mol % with n+m=100.
摘要:
A hyperbranched dendritic polyether, which optionally is further processed, such as further chain extended, chain terminated and/or functionalised. The hyperbranched dendritic polyether is obtained in a process comprising the step of thermally initiated cationic ring-opening polymerisation of at least one oxetane having at least two reactive groups of which at least one is an oxetane group. The thermally initiated ring-opening polymerisation is performed using an effective amount of at least one initiator, such as a thermal onium salt, a Lewis acid and/or a Brønsted acid. The terminal groups in said hyperbranched dendritic polyether are substantially hydroxyl groups and used for said optional further processing.
摘要:
Biobased cross-linked compositions, methods of fabrication and structures, in particular biobased printed wiring boards using the compositions and methods of making the structures are described. Biobased materials such as lignin, crop oils, wood resins, tannins, and polysaccharides and combinations thereof are cross-linked, preferably using heat, a cross-linking agent, and an initiator. The materials fabricated have suitable properties for printed wiring boards which are made by impregnating a fiberglass or biobased cloth with an admixture of the biobased material, cross-linking agent and initiator which is processed by conventional methods to produce a printed wiring board.
摘要:
The invention describes a fast curable system for the preparation of amine modified thermosettings containing triazine groups, the system comprising at least one polyfuctional organic monomeric or prepolymerized cyanate and at least one primary or secondary amine, wherein the amount of amine is selected such that the molar ratio of cyanate radicals to amine radicals is from 95:5 to 50:50, and optionally additional additives, characterized in that the amine is present in a form having a blocked or decreased reactivity which can be reactivated without reacting it with a chemical participant of reaction. Further, it is directed to amine modified thermosetting materials containing triazine groups as well as to a method for preparing same.
摘要:
Polymeric compounds useful as low foaming surfactants and defoaming and stabilizing agents for aqueous-and nonaqueous-based compositions, and to processes for the preparation of the polymeric compounds, wherein the polymeric compounds are the reaction products of reactants comprising A) at least one linking compound of formula I R1(X)3 (I) wherein each X group is a halogen atom or one X group is a halogen atom and two X groups represent an epoxy oxygen atom, which is attached to two adjacent carbon atoms in the R1 group to form an epoxy group, and R1 is an alkanetriyl group containing from 3 to 10 carbon atoms; and B) compounds of formula 11 R2(OA)nX (II) wherein R2 is an organic group containing from 4 to 36 carbon atoms, n is a number of from 0 to 200, X is —OH, —NHR′, or —SH and each OA group is independently an ethyleneoxy, 1,2-propyleneoxy, or 1,2-butyleneoxy group.
摘要:
The present invention provides a polymer electrolyte composition excellent in radical resistance and/or proton conductivity. The polymer electrolyte composition comprises an aromatic polymer phosphonic acid derivative represented by the following formula (1); and at least one selected from the group consisting of a phosphoric acid derivative and a polymer electrolyte. (wherein -Z- represents —SO2— or —CO—, x and y each represent 0.01-0.99 provided that the sum of x and y is 1, —Ar— represents a divalent aromatic group of 4-18 carbon atoms which may contain a hetero atom and may contain one or more substituents, n represents the average number of substituents per unit structure of polymeric moiety containing the aromatic group and is a positive number of 8 or less, and R and R′ each independently represent a hydrogen atom or an alkyl group).
摘要:
Provided is an epoxy resin having glycidylamino group, wherein the content of hydrolyzable chlorine is 1000 ppm or less. The epoxy resin is useful for adhesives, paints and electric/electronic materials(e.g. insulation materials, laminated plate, etc.).
摘要:
Latexes are thickened by compounds of the formula: R1—(O—A)a—B1—R2—(B2—R3)d—(B3—(A′—O)b-f—(A′—B4)f—R4—(B5—R5)e)n—B6—(A″O)c—R6 wherein: R1 and R6 are monovalent hydrophobic groups independently selected from the group consisting of an aliphatic group, a substituted aliphatic group, an aromatic group, and a substituted aromatic group; R2 and R4 are independently selected from the group consisting of aliphatic, substituted aliphatic, aromatic, or substituted aromatic radicals, each radical being divalent or trivalent; R3 and R5 are independently selected from hydrogen, lower alkyl and lower aralkyl; B1, B2, B3, B4, B5, and B6 are linking groups independently selected from the group consisting of an oxygen atom (to form the ether linkage —O—), a carboxylate group (to form an ester linkage R2—C(O)—O— and/or R4—C(O)—O—), an amino group (to form the amine linkage R2—N(R)— and or R4—N(R)—, wherein R is hydrogen, lower alkyl, lower aralkyl, or lower acyl), and an amido group (to form the amide linkage R2—N(R)—C(O)— and/or R4—N(R)—C(O)—, wherein R is hydrogen, lower alkyl, lower aralkyl, or lower acyl); each of a, b, c, d, e, f, and n are integers, wherein each of a and c are independently any integer from greater than 20 to about 200; b is any integer from greater than 20 to about 450; d, e, and f are zero or 1; and n is any integer from 1 to about 5; and each of A, A′, and A″ is independently an ethylene, 1,2-propylene, 1,2-butylene unit or combinations thereof.