公开(公告)号：ZA708555B

公开(公告)日：1971-09-29

申请号：ZA708555

申请日：1970-12-18

Applicant: BAYER AG

Inventor： SCHUBART R ,  ROOS E ,  EHOLZER A ,  KEMPERMANN T

IPC: C07F9/165 ,  C08K5/5398 ,  B29H

Abstract: 1339632 Vulcanizing olefin terpolymer rubbers BAYER AG 7 Jan 1971 [13 Jan 1970] 781/71 Heading C3P [Also in Division C2] The vulcanization of an ethylene-propylene terpolymer (EPDM rubber) using sulphur or a sulphur-donor is effected in the presence of a vulcanization accelerator which is an S,S 1 - carbonyl bis-dithio-phosphate diester of the formula wherein R is a C 1 -C 6 alkyl radical which may be substituted by a C 1 -C 4 alkoxy radical, and a thiazole type accelerator, e.g. 2-mercaptobenzothiazole, dibenzothiazyl disulphide or the zinc salt of 2-mercaptobenzothiazole. A thiuramic or dithiocarbamate accelerator and/or a thiourea may also be present. The preferred dithiophosphate diester derivatives (I) are those in which each of the R radicals is n-butyl or isobutyl respectively. The vulcanization may be effected in conventional manner generally at 120-300‹ C. and the EPDM rubbers may also contain the usual fillers and other additives, e.g. carbon black, an aliphatic mineral oil, zinc oxide and stearic acid. Specified EPDM rubbers are those containing dicyclopentadiene and ethylidene norbornene respectively as the diene component.

公开(公告)号：SE320758B

公开(公告)日：1970-02-16

申请号：SE810866

申请日：1966-06-14

Applicant: BAYER AG

Inventor： WIEDEN H ,  RELLENSMANN W ,  HOLTSCHMIDT H ,  ROOS E ,  DIETRICH D ,  NISCHK G

IPC: C08G18/08 ,  C08G18/42 ,  C08G18/83 ,  D01F6/72 ,  D01F7/04

Abstract: 1,150,634. Polyurethane fibres. FARBENFABRIKEN BAYER A.G. 15 June, 1966 [15 June, 1965; 17 July, 1965], No. 26775/66. Heading C3R. Cross-linked polyurethane fibres are prepared by reacting a substantially linear polyhydroxyl compound of OH number 35 to 120 with a stoichiometric excess of a diisocyanate to form an isocyanate group-terminated prepolymer, reacting this prepolymer in a polar organic solvent at - 10‹ to 100‹ C. with 80 to 130% based on the NCO groups of a chain lengthening agent having a M.W. below 500 together with up to 50 mol per cent of a CO-chain lengthening agent which contains at least one tertiary nitrogen atom, so as to form a polyurethane solution containing at least 100 milli-equivalents of tertiary nitrogen per kilogram of elastomer, adding to this polyurethane solution an equivalent or less than equivalent quantity of a bis- or polyfunctional alkylating agent, forming the solution into fibres and allowing the product to cure. The polyhydroxyl compound may be a polyester, polyesteramide, polyether, polythioether or polyacetal whilst the diisocyanate may be aliphatic or aromatic, especially diphenylmethane-4,4 1 -diisocyanate, the isomeric toluylene diisocyanates and hexamethylene diisocyanate. Suitable chain-lengthening agents are water, glycols, aminoalcohols, diamines, dihydrazides or hydrazine. The co-chain lengthening agents may be monomeric or polymeric, those exemplified being N,N 1 -bis-#-hydroxyethyl piperazine; N,N 1 -bis- (γ-aminopropyl)- N,N 1 - dimethylethylenediamine; bis - (# - hydroxypropyl1)-methyl amine; a polymer prepared by self-condensation of bis-(#-hydroxypropyl)-methylamine; a polymer prepared by self-condensation of N - cyclohexyldiethanolamine; and a polymer prepared by reacting 1,6- hexane diol with N-butyl-diethanolamine. Preferred bis- or polyfunctional alkylating agents are organic halogen compounds especially 4,4 1 - bis - (chloromethyl) - diphenyl ether; 1,3 - dimethyl - 4,6 - di - (chloromethyl) - benzene and p-xylylene dichloride. The solvents used may be dimethylformamide, dimethylacetamide, dimethylsulphoxide or dimethoxydimethylacet. amide, if desired in admixture with up to about 20% by weight of other solvents such as dioxane, tetrahydrofuran or chlorobenzene. Heattreatment of the fibres at 50-150‹ C. allows the quaternating reaction between the bis- or polyfunctional alkylating agents and tertiary nitrogen atoms of the polyurethane chains to take place.