Rolf Albach

Rolf Albach
Covestro Deutschland AG · Polyurethanes R&D

Dr., MBA

About

25
Publications
1,444
Reads
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375
Citations
Introduction
Disruptive new polymers, fire safety, emissions, circular economy.
Additional affiliations
September 1992 - December 1993
Université Paris-Sud 11
Position
  • Professor (Assistant)

Publications

Publications (25)
Preprint
Full-text available
Different phosphazenes were tested to improve the reaction to fire of flexible foams.
Patent
Full-text available
Phosphinates are halogen-free flame retardants even in the sense that their production does not necessitate chlorine. The production through P4 is still CO2-intensive but avoids the need of chlorine electrolysis. They are highly effective but affordable only for the electronics industries until today. Unlike 30 years ago, when CFC were forbidden, o...
Patent
Full-text available
Polyurethanes are #5 among the polymers after PE, PP, PVC and PS and just before PET. Half of PUR is flexible foam and 2/3 of flexible foam is polyether, dominantly poly(oxypropylene). Propylene oxide cannot yet be produced from renewable resources or CO2. Therefore there is an interest to combine it with monomers that can. The direct use of CO2 is...
Article
Full-text available
The lipase catalyzed synthesis of furan-comprising polyester oligomer diols (α,ω-telechelic diols) is reported. Oligofuranoate diols with excellent endgroup fidelity and a yield of 95 % were synthesized using a solvent-free two-stage polycondensation of dimethyl furan-2,5-dicarboxylate (DMFDCA) and 1,4-cyclohexanedimethanol (1,4-CHDM) using immobil...
Article
Full-text available
A series of new flame retardants (FR) based on dibenzo[d,f][1,3,2]dioxaphosphepine 6-oxide (BPPO) incorporating acrylates and benzoquinone were developed previously. In this study, we examine the fire behavior of the new flame retardants in polyisocyanurate (PIR) foams. The foam characteristics, thermal decomposition, and fire behavior are investig...
Article
A series of phosphonate-containing compounds based on dibenzo[d,f][1,3,2]dioxaphosphepine 6-oxide (BPPO) is presented. BPPO is synthesized by a three–component condensation and is added to activated alkenes with systematically varied structure via phospha-Michael addition. Acrylates, α,β-unsaturated carboxylic acid diesters and benzoquinone are use...
Article
Full-text available
Polyurethane (PU) coatings were successfully produced using unmodified kraft lignin (KL) as an environmentally benign component in contents of up to 80 wt%. Lignin samples were precipitated from industrial black liquor in aqueous solution working at room temperature and different pH levels (pH 2 to pH 5). Lignins were characterized by UV-Vis, FTIR,...
Article
Full-text available
The paper outlines the changes in geography of research that is documented in the WIPO patent database. Although only a small percentage of patents survive the hype cycle the changes are reason for concern. The paper discusses the effectiveness of politics that tries to speed up innovation by networks.
Patent
Full-text available
The Knoevenagel kondensation seems to work also in condensed matter like polyurethane polymers
Patent
Full-text available
The Baylis-Hillman reaction surprisingly seems to work in condensed matter like polymeric polyurethane.
Research
Full-text available
New developments in the industrial synthesis of optically pure intermediates: Rolf W. Albach, Claus Dreisbach, Wolfram Sirges in Pharmaceutical Manufacturing International 1997, pages 105-108: Ruthenium-based catalysts for asymmetric hydrogenation, enzymatic resolution
Patent
Semi-rigid polyurethane foams having a density of 90 to 180 kg/m3 and a compressive strength of 20 to 95 kPa are produced by reacting a polyisocyanate with an isocyanate-reactive component that includes an o-toluenediamine initiated polyether polyol. These foams are particularly useful as composites for automotive interior components.
Article
The compound [Mn2III,IVO2(bisimMe2en)2](ClO4)3·H2O (bisimMe2en = N,N‘-dimethyl-N,N‘-bis(imidazol-4-ylmethyl)ethane-1,2-diamine) was synthesized. It crystallizes in the monoclinic space group C2/c with a = 18.139(8) Å, b = 12.694(5) Å, c = 17.694(8) Å, β = 107.5(6)°, V = 3885(6) Å3, and Z = 4. The cation [Mn2III,IVO2(bisimMe2en)2]3+ contains a di-ma...
Article
Electrochem. one-electron redn. of the dinuclear d1-d1 organorhenium oxides Me4Re2O4 (1) and (c-Pr)4Re2O4 (2, c-Pr = cyclopropyl) reversibly yields the mono-anions 1- and 2-. Further electrochem. redn. is irreversible. The obsd. mechanisms upon electrochem. redn. and the involved electrode kinetics are discussed in the light of the electrochem. dat...
Article
The electrochemistry of dioxomolybdenum(VI) with the tetradentate S2(NH)2-type ligand N,N'-bis(2-mercap-tophenyl)-2,3-diaminobutane(mPhabH4), at neutral, acidic, and basic conditions, has been investigated. The molecular structure of (mPhabH2)Mo(VI)O2 (1) has been determined: space group P2(1)2(1)2, (No. 19), a = 8.667 (<1), b = 12.884(<1), c = 19....
Article
Cyclic voltammograms, electronic and Mössbauer spectra were recorded for a series of sterically hindered ferrocenes bearing trimethylsilyl and tert-butyl groups Fe[η5-C5H3(EMe3)2-1,3]2, Fe[η5-C5H2(EMe3)-4-(SiMe3)2-1,2]2 (E = C, Si), and Fe[η5-C5H2(SiMe3)3-1,2,4](η5-C5R5) (R = H, CH3). The redox potential of Fe[η5-C5H2(SiMe3)3-1,2,4]2 is more negati...
Article
Tetramethyloxoosmium(VI) (2a), the first example of methylosmium oxides (CH3)(x)Os(y)O(z), has been synthesized from osmium tetraoxide (1a) and dimethylzinc (19% yield) or methyltris(isopropoxy)titanium (50% yield). A more directed synthesis (60% yield) is methylation of the glycolate osmium(VI) complex O = activated Os(OCH2CH2O)2 (1b), which precu...
Article
Two key compounds of organometal oxides, methyltrioxorhenium(VII) (1) and trioxo(eta-5-pentamethylcyclopentadienyl) rhenium(VII) (2), have been structurally characterized by means of electron diffraction techniques, showing that the ReO3 fragments of these compounds have trigonal-pyramidal structures in the gas phase. The rhenium-carbon distance of...
Article
Cyclic Metal(IV)Amides Synthesis and structure of cyclic amide complexes of quadrivalent titanium, vanadium, and chromium are described, and their electrochemical behavior is investigated by cyclic voltammetry. The novel amides of formula ML2 {MTi, (3b); MV, (3c); MCr, (3d); L=[(CH3)3SiNCH2CH2NSi(CH3)3]} are formed by reaction of the halide adducts...
Article
Electrochemical reduction of the dinuclear d1–d1 organorhenium oxide Me4Re2O41 or chemical reduction by cobaltocene cleanly yields the radical anion 1˙– which, upon controlled exposure to oxygen, disproportionates into hydrocarbons and the novel trinuclear complex [(C5H5)2Co][(Me)6Re3O6]2; this compound represents the first example of an acyclic or...

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Projects

Projects (3)
Project
Strenghthen the strengths (insulation performance, humidity absorption, mechanical strength, non-melting, lightweight construction) and improve on reaction to fire and use of fossile resources.