EP0350112A1
Expired / Lapsed
EP
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Polyurethanes prepared from non-linear optical active diols
Assignee: Akzo Nobel NV
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Filing: 1989-06-30
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Granted: —
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Expires: 2009-06-30
Abstract
Abstract Polyurethanes prepared from non-linear optical active diols (NLO-diols) of the formula according to claim 1, of which the essence is that they have a delocalized π electron system to which both an electron donor group and an electron acceptor group are coupled directly (DπA system). The polyurethanes have high hyperpolarizability densities and other favourable properties and can be easily prepared. They are to be used in optical waveguides.
Inventors
- 👤 Carel Theodoor Jozef Wreesmann
- 👤 Erwin Wilhelmus Petrus Erdhuisen
- 👤 Doetze Jakob Sikkema
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 17:32
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/361; G02F1/3615; G02F1/3617; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3819; C08G18/384; C08G18/67; C08G18/675; C08G18/677; C08G18/678; C08G63/00; C08G63/68; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3833; C09K19/3838; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/244; G11B7/245; G11B7/25
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
99 words
A polyurethane obtained by reacting a diol of the formula: wherein D is a trivalent donor group having 2-10 aliphatic carbon atoms and containing at least one alkoxy-oxygen atom or a nitrogen atom forming a tertiary amine, the oxygen or nitrogen atom being linked directly to the benzene ring attached to this group, and wherein R₁ = halogen, R₂, OR₂, COR₂, COOR₂, CN or CF₃; R₂ = H or an alkyl group having 1-3 carbon atoms; Y = CR₂, C-CN, or N; A = CN, NO₂, = C(CN)₂, C = C(CN)₂, or CF₃; n = 0-4. with a diisocyanate.
Claim 2
Dependent Claim
99 words
A polyurethane obtained by reacting a diol of the formula: wherein D is a trivalent donor group having 2-10 aliphatic carbon atoms and containing at least one alkoxy-oxygen atom or a nitrogen atom forming a tertiary amine, the oxygen or nitrogen atom being linked directly to the benzene ring attached to this group, and wherein R₁ = halogen, R₂, OR₂, COR₂, COOR₂, CN or CF₃; R₂ = H or an alkyl group having 1-3 carbon atoms; Y = CR₂, C-CN, or N; A = CN, NO₂, = C(CN)₂, C = C(CN)₂, or CF₃; n = 0-4. with a diisocyanate.
Claim 3
Dependent Claim
23 words
A polyurethane according to claim 1, characterized in that the group and that R₁ = H, Y = CH, and A = NO₂.
Claim 4
Dependent Claim
22 words
A polyurethane according to claim 1 or 2, characterized in that the diisocyanate is isophorone diisocyanate, methylene di(p-phenylene isocyanate), or methylene di(cyclohexylene-4-isocyanate).
Claim 5
Dependent Claim
17 words
An optical waveguide, characterized in that it is of a polyurethane according to one of claims 1-3.
References Cited (Backward Citations)
EP0194747A2
Cited
EP0241338A1
Cited
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