Bonding

1938 ◽  
Vol 11 (1) ◽  
pp. 169-186
Author(s):  
B. J. Habgood
Keyword(s):  
Natural Rubber ◽  
New Method ◽  
Bonding Agent ◽  
Butadiene Rubber ◽  
High Concentration ◽  
Chloro Derivatives ◽  
Brass Plating ◽  
Derivatives Of

Abstract 1. Neoprene and rubber can be bonded directly, provided that: (a) the composition of the two stocks are balanced; (b) the stocks are kept warm; (c) bonding is carried out with the minimum of delay. 2. Neoprene and rubber can be bonded by other methods which give greater latitude of working: (a) by the use of a high concentration of accelerator at the interface; (b) by the use of a tie-gum mix made from butadiene rubber (preferably sodium-polymerized); (c) by the use of mixtures of Neoprene, chloro derivatives of rubber, either alone or admixed with rubber. Partially hydrochlorinated rubber is particularly useful in this direction. 3. Synthetic rubbers can be bonded one to another or to natural rubber either directly or through the medium of sodium-butadiene rubber. 4. The bonding of rubber to metal has been considered and the main methods discussed, including bonding by means of ebonite; alloys, particularly brass; cyclorubbers, Thermoprenes, and cements. 5. The bonding of synthetic rubbers to metals has been examined and a new method of bonding Neoprene to a variety of metals, including iron, steel, aluminum, zinc, and lead, has been worked out, using a solution of chlorinated rubber as bonding agent. 6. By combining the various methods described in this paper, rubber may be bonded to metals such as aluminum without brass plating.

Mixing, Curing and Reinforcement of NR/BR/EPDM Blends for Tire Sidewall Applications

2009 ◽  
Vol 82 (3) ◽  
pp. 379-399 ◽  
Author(s):  
H. Zhang ◽  
R. N. Datta ◽  
A. G. Talma ◽  
J. W. M. Noordermeer
Keyword(s):  
Natural Rubber ◽  
Butadiene Rubber ◽  
High Concentration ◽  
Ethylene Propylene ◽  
Ethylene Propylene Diene Rubber ◽  
Filler Distribution ◽  
Diene Rubber ◽  
Ozone Resistance

Abstract Tire sidewalls generally consist of blends of natural rubber (NR) and butadiene rubber (BR), containing a high concentration of antiozonants to provide ozone resistance. However, the most widely used antiozonant, N-(1, 3-dimethyl-butyl)-N'-phenyl-p-phenylenediamine (6PPD), is a staining, toxic and environmentally unfriendly substance. Incorporation of Ethylene-Propylene-Diene rubber (EPDM) into NR/BR is a way of achieving non-staining ozone resistance. But blending of dissimilar rubbers is severely restricted due to viscosity mismatch, thermodynamic incompatibility, cure incompatibility and heterogeneous filler distribution. This chapter gives an overview of the various research approaches in the field of blending dissimilar rubbers so far, as well as the mechanism of ozone protection by incorporation of EPDM in tire sidewall applications.

Pengaruh penambahan natural rubber (NR), epoxidation natural rubber (ENR-46) dan chlorprene rubber (CR) pada sifat kompon termoplastik

2020 ◽  
Vol 26 (2) ◽  
pp. 62-69
Author(s):  
Farida Ali ◽  
Tuti I. Sari ◽  
Andi A. Siahaan ◽  
Al-Kautsar D. Arya ◽  
Tri Susanto
Keyword(s):  
Tensile Strength ◽  
Natural Rubber ◽  
Vinyl Chloride ◽  
Butadiene Rubber ◽  
Elongation At Break ◽  
Nitrile Butadiene Rubber ◽  
Poly Vinyl Chloride

Penelitian ini untuk mengetahui pengaruh penambahan Natural Rubber (NR) dan Epoxidation Natural Rubber (ENR-46) dengan kompatibiliser Chlorprene Rubber (CR) pada aplikasi kompon termoplastik Poly Vinyl Chloride (PVC) dan Nitrile Butadiene Rubber (NBR), variabel penelitian meliputi ENR-46/PVC/NBR/CR, NR/PVC/NBR/CR dan CR-NR/PVC/NBR, CR-ENR-46/PVC/NBR. Parameter pengujian sifat fisik-mekanik : Hardness (Shore A), Tensile Strength (Mpa), Elongation at Break (%) dan ketahanan terhadap pelarut minyak (n-Pentane, Toluene, Hexane dan Pertalite). Hasil penelitian didapatkan untuk sifat fisik-mekanik, semakin banyak penambahan NR Kekerasan kompon termoplastik akan menurun, Tensile Strength dan Elongation at Break kompon akan meningkat begitu juga dengan CR-NR. Tetapi berbanding terbalik hasilnya untuk ENR-46 dan CR-ENR-46. Pengujian Ketahanan terhadap pelarut minyak semakin banyak penambahan ENR-46 Ketahanan kompon termoplastik terhadap pelarut akan meningkat, hasil yang sama juga pada CR-ENR-46. Tetapi berbanding terbalik hasilnya dengan penambahan NR dan CR-NR pada kompon termoplastik.

Toxicity of Para-Chloro Substituted Benzene Derivatives in the Microtox™ Test

1985 ◽  
Vol 20 (2) ◽  
pp. 36-43 ◽  
Author(s):  
Klaus L.E. Kaiser ◽  
Juan M. Ribo ◽  
Brian M. Zaruk
Keyword(s):  
General Formula ◽  
Functional Group ◽  
Structural Parameters ◽  
Systematic Investigation ◽  
Photobacterium Phosphoreum ◽  
Benzene Derivatives ◽  
Quantitative Structure ◽  
Chlorinated Benzenes ◽  
Chloro Derivatives ◽  
Derivatives Of

Abstract This paper gives the results of part of a systematic investigation into contaminant toxicity to Photobacterium phosphoreum in the Microtox™ test. Reported are the toxicity values for 39 para-chloro substituted benzene derivatives of the general formula l-Cl-C6h4-4-X=CH2CH(NH2)COOH, F, SO2NH2, OCH2COOH, CH2COOH, CONHNH2, NHCOCH3, CONH2, CH=CHCOOH, SeOOH, CH2NH2, CH2CH2NH2, NO2, H, CF3, CHO, CH2OH, OH, CH3, CCl3, COCH3, COOH, NH2, SO2C6H5, Cl, CH2COCH3, COCl, CN, OCH3, NCO, NHCH3, I, COC6H5, CH2Cl, SH, CH2SH, NCS, CH2CN and SO2C6H4Cl. Except for the last compound, whose solubility is below the required concentration, the toxicities increase in the presented order with a total range of more than three orders of magnitude. The data are discussed in terms of quantitative structure-toxicity correlations with compound-specific structural parameters. In combination with a previously developed submodel on chlorinated benzenes, phenols, nitrobenzenes and anilines, the observed relationships allow the prediction of the toxicity of some 780 possible chloro derivatives of the general formula C6H5-nClnX, where n=<5 and X is a functional group as listed above.

Some 6-substituted derivatives of D-8-cyanomethylergoline-I and D-8-methylergoline-I

1979 ◽  
Vol 44 (3) ◽  
pp. 946-951 ◽  
Author(s):  
Antonín Černý ◽  
Jiří Křepelka ◽  
Miroslav Semonský
Keyword(s):  
Inhibiting Activity ◽  
Chloro Derivatives ◽  
Derivatives Of

Compounds III-XX exhibiting antilactation and antinidation effects in tests on rats were prepared on N(6)-alkylation of D-8-cyanomethylergoline-I (I) or D-8-methylergoline-I (II) with corresponding bromo (chloro) derivatives in dimethylformamide. The most distinct prolactin-inhibiting activity was found in compound III.

Some 1-substitution derivatives of 4-aryl-2,3-dihalogeno-1-naphthols

1984 ◽  
Vol 49 (1) ◽  
pp. 110-121 ◽  
Author(s):  
Jiří Křepelka ◽  
Drahuše Vlčková ◽  
Milan Mělka
Keyword(s):  
Thionyl Chloride ◽  
Oxirane Ring ◽  
Secondary Amines ◽  
Two Phase ◽  
Lytic Effect ◽  
Primary And Secondary Amines ◽  
Phase Medium ◽  
Chloro Derivatives ◽  
Derivatives Of

Alkylation of derivatives of 4-aryl-1-naphthols (I-V) by 2,3-epoxypropyl chloride in methanolic sodium hydroxide gave epoxy derivatives VI, VIII, IX, XI and XII, apart from products of cleavage of the oxirane ring, VII and X. Analogous alkylation of compounds I, IV and V by 2-(N,N-diethylamino)ethyl chloride hydrochloride in a two-phase medium afforded basic ethers XIII to XV. The cleavage of the oxirane ring in compound VI by the action of primary and secondary amines, piperidine and substituted piperazines led to compounds XVI-XXIV. Reaction of thionyl chloride with compounds XXI, XXII and XXIV gave chloro derivatives XXV-XXVII.Exposure of compound XXII to 4-methylbenzenesulfonyl chloride produced compound XXVIII, retaining the secondary alcoholic group. In an antineoplastic screening in vivo none of the compounds prepared had an appreciable activity. Compound XVII, being an analogue of propranolol, was used in the test of isoproterenolic tachycardia, and showed a beta-lytic effect comparable with that of propranol.

Fluorinated tricyclic neuroleptics with prolonged action: 8-Methoxy, 8-ethoxy, 8-ethylthio and 8-hydroxy derivatives of 3-fluoro-10-(4-methylpiperazino)-10,11-dihydrodibenzo[b,f]thiepin

1982 ◽  
Vol 47 (5) ◽  
pp. 1382-1391 ◽  
Author(s):  
Jiří Jílek ◽  
Josef Pomykáček ◽  
Jiřina Metyšová ◽  
Miroslav Protiva
Keyword(s):  
Acetic Acid ◽  
Polyphosphoric Acid ◽  
Prolonged Action ◽  
Substitution Reactions ◽  
Methoxy Derivative ◽  
Chloro Derivatives ◽  
Boron Tribromide ◽  
Derivatives Of ◽  
Central Depressant ◽  
Boiling Toluene

Acids IIa-c were prepared by reactions of (4-fluoro-2-iodophenyl)acetic acid with 4-methoxythiophenol, 4-ethoxythiophenol and 4-(ethylthio)thiophenol and cyclized with polyphosphoric acid in boiling toluene to dibenzo[b,f]thiepin-10(11H)-ones IIIa-c. Reduction with sodium borohydride afforded the alcohols IVa-c which were treated with hydrogen chloride and gave the chloro derivatives Va-c. Substitution reactions with 1-methylpiperazine resulted in the title compounds Ia-c out of which the methoxy derivative Ia was transformed by demethylation with boron tribromide to the phenol Id. Compounds Ia-d are very potent neuroleptics exhibiting a clear prolongation of the central depressant and some prolongation of the cataleptic activity.

ChemInform Abstract: NEW CHLORO DERIVATIVES OF BENZOTHIOPYRANOINDOLES AND -QUINOLINES

1976 ◽  
Vol 7 (40) ◽  
pp. no-no
Author(s):  
A. FRAVOLINI ◽  
A. CROISY ◽  
P. JACQUIGNON
Keyword(s):  
Chloro Derivatives ◽  
Derivatives Of

Mastication Process of Natural Rubber/Butadiene Rubber Blending: Validation Method on Influence of Peptizer

2020 ◽  
Vol 391 (1) ◽  
pp. 1900175
Author(s):  
Dewi K. Arti ◽  
Ade S. Hidayat ◽  
Ika M. Ulfah ◽  
Herri Susanto ◽  
Lies A. Wisojodharmo ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Butadiene Rubber ◽  
Validation Method
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