P-Quinone-dioxime

Vulcanisation may also be brought about by zinc and calcium peroxides, p-quinone dioxime, epoxide resins, phenolic resins and di-isocyanates. 

Other mild oxidising agents which abstract the terminal hydrogen atoms and thus facilitate disulphide formation may be used as vulcanising agents. They include benzoyl peroxide, p-nitrosobenzene and p-quinone dioxime. 

The synthesis of polysulfide elastomers involves the use of a small amount of trichloroalkane in addition to dichloroalkane and sodium sulfide in order to form a branched polymer. The prepolymer is treated with a mixture of sodium hydrosulfide and sodium sulfite followed by acidification to convert all end-groups to thiol groups. Further polymerization and crosslinking is achieved by oxidative coupling of the thiol end-groups by treatment with lead dioxide, p-quinone dioxime, or other oxidizing agent... 

Vulcanization The treatment of natural rubber with sulfur to reduce its tackiness and improve its strength and elasticity. Invented independently by C. Goodyear and N. Hayward in the United States in 1839, and by T. Hancock in London in 1842-1843. Various chemicals other than elemental sulfur are effective, for example, sulfur monochloride, selenium, and p-quinone dioxime. 

Chemistry of Polysulfide Polymers. Propellant chemistry based on chemically crosslinked binders had its beginning at the Jet Propulsion Laboratory in the winter of 1946 when potassium and/or ammonium perchlorate were mixed into Thiokol LP-3 polysulfide liquid polymer, to which had been added an oxidative curative, p-quinone dioxime. This polysulfide polymer, as described by Jorczak and Fettes (13), is prepared... 

SYNS ACTOR Q l,4-BEi ZOQL L ONEDIOXINE 2,5-CYCLOHEX. DIENE-l,4-DIONE DIOXIME DIBENZO PQD DIOXIME-1,4-CYCLOHEXA-DIENEDIONE DIOXIME-2,5-CYCLOHEX. DIENE-l,4-DIONE G-M-F NCI-C03850 PQD QDO QUINONE DIOXIME p-QUINONE DIOXIME p-QUINONE OXIME... 

DBQDO . [Lord] Dibenzoyl-p-quinone dioxime vulcanizing agent for natural and synthetic elastomers. 

DBQDOtSi . [LorQ Dibenzo -p-quinone dioxime vulcanizing agent to natural and syndietic elastomers. 

The polysulfide rubbers containing terminal mercaptan groups are vulcanized by oxidation of these groups to polysulfide groups. This condensation reaction involves splitting out a small amount of water. The oxidizing agents are selected from metallic peroxides in the presence of p-quinone dioxime [27]. 

Benzoquinone. See Quinone Hydroquinone p-Benzoquinone. See Quinone Hydroquinone p-Benzoquinone bis (o-benzoyloxime). See Dibenzoyl-p-quinone dioxime... 

DBPS. See4,4 -Thlodi (2,6-di-t-butylphenol) DBQDO . See DIbenzoyl-p-quinone dioxime DBS DBS-NF. See Dibutyl sebacate DB-SHEEN . See kaolin DBT 2-EHMA. See Dibutyltin bis(2-ethyihexyi mercaptoacetate)... 

DibenzoyIdiethyleneglycol ester. See Diethylene glycol dibenzoate Dibenzoyl dipropylene glycol ester. See Dipropylene glycol dibenzoate Dibenzoyl peroxide. See Benzoyl peroxide 2,5-Di (benzoylperoxy)-2,5-dimethylhexane. See 2,5-Dimethyl-2,5-bis (benzoylperoxy) hexane Dibenzoyl-p-quinone dioxime CAS 120-52-5... 

Dioxazine violet B. See Pigment violet 37 Dioxazine violet RL. See Pigment violet 23 1,1 -Dioxide-1,2-benzisothiazol-3(2H)-one sodium salt. See Saccharin sodium anhydrous 1,1-Dioxide tetrahydrothiofuran 1,1-Dioxidetetrahydrothiophene. See Sulfolane Dioxime-p-benzoquinone Dioxime-1,4-cyclohexadienedione Dioxime-2,5-cyclohexadiene-1,4-dione. See p-Quinone dioxime... 

PQD. See p-Quinone dioxime PQ Epsom Salt Tech., PQ Epsom Salt USP. See Magnesium sulfate heptahydrate Pracarbamine. See Urethane Praestol 186K, Praestol 186KH, Praestol 187K. See Polyquaternium-6... 

N-Cyclohexyl-2-benzothiazolesulfenamide 1,3-Dibutylthiourea Dicyclohexylbenzothiazyl-2-sulfenamide Dimethyl diphenyl thiuram disulfide 2,6-Dimethylmorpholine Diphenylamine 4,4 -Dithiodimorpholine 2-Ethylbutyraldehyde Ethyl morpholine Formaldehyde aniline 2,6-Lutidine N-Nitrosodimethylamine Paraldehyde p-Quinone dioxime Selenium Selenium dimethyidithiocarbamate Sodium diethyidithiocarbamate Sodium dimethyidithiocarbamate Sodium nitrite N,N,N, N -Tetrabenzylthiuram disulfide Tetraisobutylthiuram disulfide Tetramethylthiuram disulfide Thiocarbamyl sulfenamide Thiophenol Thiourea Triethanolamine Triethylamine Triethylenetetramine n-Valeraldehyde Zinc dialkyl dithiophosphate Zinc diamyidithiocarbamate Zinc dibenzyl dithiocarbamate Zinc diisobutyidithiocarbamate Zinc isopropyl xanthate Zinc 2-mercaptobenzothiazole Zinc oxide Zinc-N-pentamethylene dithiocarbamate Zinc peroxide accelerator, rubber articles for repeated use food-contact... 

Phenyl acetate p-Quinone dioxime Toluene-2,4-diamine Tributyl phosphine 1,1,3-Triethoxy-3-methoxypropane Triethylene diamine Triethylenemelamine Trimethylolpropane tris-(B-(N-aziridinyl) propionate) Tris [1-(2-methyl-aziridinyl) phosphine oxide] Zinc acetylacetonate Zirconium acetate crosslinking agent, castings PEG-4 dimethacrylate crosslinking agent, coatings PEG-4 dimethacrylate... 

---