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公开(公告)号：US3775370A
公开(公告)日：1973-11-27
申请号：US3775370D
申请日：1971-07-27
Applicant: BASF AG
Inventor： SANDER B
CPC classification number: C08G2/06
Abstract: A PROCESS FOR THE POLYMERIZATION OR COPOLYMERIZATION OF TRIOXANE, IN WHICH THE CATALYST USED IS A SOLUTION OF AN ESTER OR MIXED ANHYDRIDE OF PERCHLORIC ACID IN A DIETHER OF A GLYCOL.
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3.发明授权Polycondensates of diamides,n,n'-ureas and formaldehyde admixed with oxymethylene polymers 失效聚氧乙烯醚，N，N'-环氧丙烷和甲氧基聚氧乙烯醚聚氧乙烯聚氧乙烯
公开(公告)号：US3836605A
公开(公告)日：1974-09-17
申请号：US33915973
申请日：1973-03-08
Applicant: BASF AG
CPC classification number: C08G12/34 , C08G12/046 , C08K5/005 , C08L59/02 , C08L61/20
Abstract: A PROCESS FOR THE PRODUCTION OF POLYCONDENSATES BY POLYCONDENSING IN AQUEOUS ACID MEDIUM (A) DIAMIDES OF DICARBOXYLIC ACIDS HAVING AT LAST FOUR CARBON ATOMS, (B) N,N''-SUBSTITUTED UREAS AND (C) FORMALDEHYDE, PRODUCTS OBTAINED IN THIS WAY AND A STABILIZIED MOLDABLE ADMIXTURE OF SAID POLYCONDENSATES WITH OXYMETHYLENE POLYMERS.
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公开(公告)号：US3808127A
公开(公告)日：1974-04-30
申请号：US25393872
申请日：1972-05-17
Applicant: BASF AG
CPC classification number: C01B25/006 , C08K9/10
Abstract: RED PHOSPHORUS IMPREGANTED WITH TRIOXANE IN A WEIGHT RATIO IN THE RANGE OF 80:20 TO 20:80. IN PARTICULAR, A MIXTURE OF FROM 40 TO 60% BY WEIGHT OF PARTICULATE RED PHOSPOHRUS AND FROM 60 TO 40% BY WEIGHT OF TRIOXANE.
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Patent Agency Ranking
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公开(公告)号：SE7411526L
公开(公告)日：1975-03-14
申请号：SE7411526
申请日：1974-09-12
Applicant: BASF AG
Inventor： SANDER B , BERBNER H , HOFFMANN M
Abstract: A process for the manufacture of nonfoaming aqueous suspensions of polyolefin fibrids using suitable dispersing agents. These are obtained by polycondensation of 1 mole of melamine, from 1.8 to 3 moles of formaldehyde and from 0.1 to 0.5 molar portions of amino carboxylic acids or alkali metal salts thereof. Very small quantities of said dispersing agents are sufficient to finely disperse the hydrophobic polyolefin fibrids in water and to prevent the formation of foam in the manufacture of web structures of a paper-like and textile-like nature. The aqueous suspensions of polyolefin fibrids may also contain cellulose fibers.
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公开(公告)号：SE373861B
公开(公告)日：1975-02-17
申请号：SE517371
申请日：1968-04-17
Applicant: BASF AG
Abstract: 1,216,275. Modified urea-formaldehyde condensates for stabilizing polyacetates. BADISCHE ANILIN- & SODA-FABRIK A.G. 19 April, 1968 [21 April, 1967 (2)], No. 18622/68. Headings C3P and C3R. Polycondensates useful as stabilizers of polyacetals against heat are prepared by heating (A) a diamide of a dicarboxylic acid having 4-18 C atoms and (B) an N : N 1 -alkyleneurea having 3-10 C atoms and/or an N : N 1 - distributed urea having alkyl, aryl or aralkyl groups of up to 8 C atoms as substituents with (C) formaldehyde in aqueous acid medium at 50‹-100‹ C., the molar ratio of (C) to (A) plus (B) being 1 to 2 : 1. Suitable starting materials are (A): azelaic, sebacic, decanedicarboxylic diamides, N : N 1 -dimethylsuberamide, adipamide and isophthalamide; (B): N : N 1 -ethylene - and - propylene - ureas, and N : N 1 - dimethyl-, -diethyl-, -dibutyl-, -diphenyl-, -ditolyl- and -methyl-tolyl-ureas. The preferred molar ratio of (A) to (B) is 0À7-1À3 : 1. The formaldehyde (C) may be supplied as paraformaldehyde, trioxane or polyoxymethylene, or in the form of previously made N-methylol derivatives of (A) or (B). H 2 SO 4 , H 3 PO 4 or strongly acid ion exchangers are suitable polycondensation catalysts. The product is preferably neutralized and washed; the viscous aqueous solution may be diluted with e.g. 1 : 3-dioxolane, methanol or methoxyethanol for use in solution, or spray dried. They are suitable for stabilizing mouldable polyacetals, especially those containing at least 80 mol. per cent oxymethylene units, the remaining units being residues of e.g. ethylene oxides, propylene oxide, 1 : 3-dioxolane, 1:3- dioxane, 1:3-dioxacycloheptone or diglycol formal. Conventional phenolic or hydrazone antioxidants may also be added, or secondary aromatic amines, and also pigments and fillers. In Examples stabilizers are prepared from (Example 1-3) isophthalamide, N : N 1 - ethyleneurea and 30% formalin; in Examples 4 and 6 adipamide is used as (A); in Example 8 4-methoxy-5 : 5 dimethyl-N : N 1 -propyleneurea is used as (B). In Example 5 a trioxane (97%) dioxolane (3%) copolymer is stabilized with 0À2% of products of the invention, 0À25% of 2 : 2 1 - methylene - bis (4 - methyl - 6 - t - butylphenol) and 0À02% NaF.
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公开(公告)号：AU5848980A
公开(公告)日：1980-11-27
申请号：AU5848980
申请日：1980-05-16
Applicant: BASF AG
Inventor： SANDER B
Abstract: Improving the dewatering characteristics of sludges using an organic flocculant, subjecting the sludges, after the organic flocculant has been added, to an energy input of from 0.005 to 0.5 watt/litre, in particular from 0.01 to 0.2 watt/litre, in a mixing apparatus for from 0.5 to 3 minutes, in particular 1 to 2 minutes. The organic flocculant used can basically be any one of the commercial brands. They are water-soluble macromolecular compounds from the polymerisation or copolymerisation of acrylamide, acrylic acid and/or salts thereof or esters of acrylic or methacrylic acid which have been specially modified via their alcohol component.
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