NOPR Collection:

Deltamethrin spray as a long-term protectant of wool fabrics from insect pests in store

1993-09-01T00:00:00Z

Title: Deltamethrin spray as a long-term protectant of wool fabrics from insect pests in store Authors: Veer, Vijay; Rao, K M Abstract: The effectiveness of solvent-based sprays of 0.025% and 0.05% deltamethrin on wool fabrics stored for 60 months after the treatment has been evaluated against Tinea translucens (the tropical casemaking clothes moth), Anthrenus flavipes (the furniture carpet beetle) and Attagenus fasciatus (the banded carpet beetle). It has been found that spray of 0.025% deltamethrin provides effective protection to the fabrics from the larval feeding of above pest species up to 60 months in store. Deltamethrin residue of 0.025% concentration on fabrics stored for 60 months has been estimated to be 0.011% (on wool weight) which is 62% less than the initial deposit. Page(s): 156-157

Syntheses of 3-aryl-5-[6-(α-picolyl)]rhodanines and 3-aryl-5-(2-pyridylmethylene)rhodanines and their dyeing performance on acetate and/or other fibres

1993-09-01T00:00:00Z

Title: Syntheses of 3-aryl-5-[6-(α-picolyl)]rhodanines and 3-aryl-5-(2-pyridylmethylene)rhodanines and their dyeing performance on acetate and/or other fibres Authors: Fadda, A A; Ali, M M; El-Ahl, A S; Fouda, A Abstract: 3-Aryl-5-[6-(α-picolyl)]rhodanines (IIIa-g) and 3-aryl-5-(2-pyridylmethylene)rhodanines (IVa,b,f,g) were. prepared by treatment of α-picoline N-oxide (I) with 3-aryl rhodanines (II) at 90°C in presence of acetic anhydride and their dyeing performance of polyester, polyacrylic and wool fibres was assessed. The effect of nature and orientation of substituents on the colour of these compounds was also studied. All the compounds showed good affinity towards polyester fibres followed by polyacrylic and wool fibres. Page(s): 151-155

Syntheses and dyeing performance of 1-arylazo- 3-(4-substituted benzamido)naphth-2-ols and 1-arylazonaphth-2-ol-3,6-disulphonamides

1993-09-01T00:00:00Z

Title: Syntheses and dyeing performance of 1-arylazo- 3-(4-substituted benzamido)naphth-2-ols and 1-arylazonaphth-2-ol-3,6-disulphonamides Authors: Rangnekar, D W; Mehta, J B Abstract: 3-Aminonaphth-2-ol (II), prepared from naphth-2-ol-3-carboxylic acid (I), was condensed with 4-substituted benzoyl chlorides (IIIa-c) and the resulting compounds 3-(4-substituted benzamidoinaphth- 2-ols (IVa-c) were coupled with representative aryl diazonium salts (Va-c) to give 1-arylazo- 3-(4-substituted benzamido )naphth-2-ols (VIa-i). 1-AryIazonaphth-2-ol-3,6-disulphonic acids (IXa-c), obtained by coupling .naphth-2-ol-3,6-disulphonic acid (VIII) with aryl diazonium salts (VIIa- c), were converted to the corresponding 1-arylazonaphth-2-ol-3,6-disulphonyl chlorides (Xa-c)by treatment with thionyl chloride. The compounds Xa-c when reacted separately with piperidine, morpholine and aniline gave 1-arylazonaphth-2-ol-3,6-disulphonamides (XIa-i). The compounds VIa-i and XIa-i when applied on polyester and polyamide fibres as disperse dyes gave orange yellow to reddish violet shades with moderate to excellent pick-up, moderate light fastness and very good sublimation fastness. Page(s): 145-150

Action of weak alkali on jute

1993-09-01T00:00:00Z

Title: Action of weak alkali on jute Authors: Sikdar, B; Mukhopadhyay, A K; Mitra, B C Abstract: The effect of various weak alkalies at very low concentration (0.25%) on jute fibre has been studied. It is observed that sodium carbonate in very dilute solution cleans the fibre surface more Without any damage. Also, the treated fibres become more regular to cause reduced spinning end breakage rate, leading to higher yam productivity. Page(s): 139-144