摘要:
The invention relates to polyethers, polyamines, and polythioethers, as well as to processes for synthesizing them, e.g., using olefins as starting material.
摘要:
A process for preparing a hybrid polyester-polyether polyol comprises contacting a carboxyl group-containing component and an epoxide, optionally in the presence of one or more of a double metal cyanide catalyst, a superacid catalyst, a metal salt of a superacid catalyst and/or a tertiary amine catalyst, under conditions such that a hybrid polyester-polyether polyol is formed. The hybrid polyester-polyether polyol offers the advantages of both ester and ether functionalities when used in a polyurethane formulation, thus enhancing physical properties. The process results in products having narrow polydispersity, a low acid number and unsaturation, and reduced byproduct formation, particularly when the double metal cyanide catalyst is employed.
摘要:
A process for the preparation of acylated secondary alcohol alkoxylates anda process for making secondary alcohol alkoxy sulfates comprising the steps of:preparing secondary alcohol alkoxylates by the afore-mentioned process; andsulfating the secondary alcohol alkoxylates is described.
摘要:
CYCLIC ETHERS ARE POLYMERIZED IN THE PRESENCE OF A SULFUR-CONTAINING CATALYST FORMED BY REACTING A COMPOUND OF A TRIVALENT METAL OF THE FORMULA
(RO)(R0)M''-OX
WITH A COMPOUND OF A DIVALENT METAL OF THE FORMULA
YO-M-Z
WHEREIN M'' IS A TRIVALENT METAL OF GROUPS III TO VI AND VII OF THE PERIODIC SYSTEM; M IS A DIVALENT METAL OR A METAL-CONTAINING GROUP, THE METAL OF WHICH HAS TWO FREE VALANCES, OR GROUPS I, II AND IV TO VIII OF THE PERIODIC SYSTEM; Z IS AN OR GROUP OR A HYDROCARBYLSULFINYLOXY GROUP; ONE OF THE SYMBOLS X AND Y REPRESENTS AN R GROUP, THE OTHER REPRESENTING A HYDROCARBYLSULFINYL GROUP; AND R, WHICH MAY BE SIMILAR OR DISSIMILAR, DENOTES A MONOVALENT HYDROCARBYL GROUP OF 1 TO 6 CARBON ATOMS. THE POLYMERIC PRODUCTS ARE USEFUL PLASTICS OR RUBBERS.
摘要:
A process for the preparation of acylated secondary alcohol alkoxylates and a process for making secondary alcohol alkoxy sulfates comprising the steps of:— preparing secondary alcohol alkoxylates by the afore-mentioned process; and sulfating the secondary alcohol alkoxylates is described.
摘要:
The present invention relates to a continuous process for manufacturing copolyether glycols with high incorporation of alkylene oxide by polymerization of tetrahydrofuran and at least one alkylene oxide in the presence of an acid catalyst, at least one compound containing reactive hydrogen atoms, and a specific diluent or solvent. More particularly, the invention relates to a diluent or solvent-assisted continuous process for manufacturing copolyether glycols with high incorporation of alkylene oxide.
摘要:
A process for preparing a hybrid polyester-polyether polyol comprises contacting a carboxyl group-containing component and an epoxide, optionally in the presence of one or more of a double metal cyanide catalyst, a superacid catalyst, a metal salt of a superacid catalyst and/or a tertiary amine catalyst, under conditions such that a hybrid polyester-polyether polyol is formed. The hybrid polyester-polyether polyol offers the advantages of both ester and ether functionalities when used in a polyurethane formulation, thus enhancing physical properties. The process results in products having narrow polydispersity, a low acid number and unsaturation, and reduced byproduct formation, particularly when the double metal cyanide catalyst is employed.
摘要:
The present invention relates to a continuous process for manufacturing copolyether glycols with high incorporation of alkylene oxide by polymerization of tetrahydrofuran and at least one alkylene oxide in the presence of an acid catalyst, at least one compound containing reactive hydrogen atoms, and a specific diluent or solvent. More particularly, the invention relates to a diluent or solvent-assisted continuous process for manufacturing copolyether glycols with high incorporation of alkylene oxide.
摘要:
Copolyether glycols are prepared by copolymerizing alkylene oxides or cyclic acetals and tetrahydrofuran, using(1) a polymeric catalyst which contains sulfonic acid groups; and(2) a chain terminator which is water or an alkanediol.
摘要:
Process for preparing linear terminally differentially electrophilically reactive prepolymers by reacting cyclic ethers or lactones comprising a major proportion of tetramethylene oxide with an initiator represented by the asymmetrical structureYO.sub.m SO.sub.2 R.sub.n Q,whereinQ is a first radical which in anionic form is a non-terminating anion in the polymerization of tetramethylene oxide;Y is a second radical, free from alkylatable groups, selected from alkyl, alkaryl, aryl, aralkyl and cycloalkyl and having the free valence on a carbon atom devoid of halogen atoms;n = 0 or 1;m = 0 or 1; andR is a divalent bridging radical comprising at least one oxyalkylene radical --(OR').sub.q where q is 1 to 300 and preferably 1 to 50, and R' is alkylene of 2 to 10 carbon atoms, at least half being C.sub.4 H.sub.8.The differentially electrophilically reactive prepolymers have different reactivity at the two ends so that successive reagents can react with the two ends to give product prepolymers having two unlike terminations. Such product prepolymers can provide segmented copolymers having utility as adhesives, elastomers and protective coatings.
摘要翻译:通过使包含主要比例的四氢呋喃的环醚或内酯与由不对称结构YOmSO 2 R n Q表示的引发剂反应来制备线性末端差异亲电反应性预聚物的方法,其中Q是阴离子形式的第一个基团,其为阴离子形式的非终止阴离子 四氢呋喃的聚合; Y是不含可烷基的第二个基团,选自烷基,烷芳基,芳基,芳烷基和环烷基,并且在没有卤素原子的碳原子上具有游离价; N = 0或1; M = 0 OR 1; 和R是包含至少一个氧化烯基 - (OR')q的二价桥连基团,其中q为1至300,优选1至50,R 1为2至10个碳原子的亚烷基,至少一个为C 4 H 8。