Патент USA US2130242код для вставки
Patented Sept. 13, 1938 2,130,242“ UNITED STATES? PATENT." OFEtl-CEZ VULOANIZATION OF- RUBBER William~E.:Messer,- Cheshire, Conn” assignor to».~. United . States» Rubber Products,- ; Inc., New 1 York, N.. Y.; a corporation _of.Delaware No-v Drawingr Application February: 16,‘; 1935;-v Serial .No. (k807i 2 Claims. This invention relates to the use of new and improved accelerator combinations, useful in the production of vulcanized rubber goods. An object of this invention is to provide a new 5 activator for organic accelerators and more par . (01." 181-53) " Scorch test (5 pounds per sq. in. steam pressure) Cure in minutes _ ticularly for thiazyl sulphide vulcanization ac celerators such as the arylene thiazyl sulphides and disulphides which when used in conjunction therewith will tend to produce less scorching and 1017 795 1692 2107 817 10 10 better calendering as well as better ageing rub ber stocks. Unaged ‘ These activators are characterized in being broadly amino thiophenols characterized by the grouping Cure in ruins. at 30 lbs. sq. in. steam pressure 15 2820 3960 4530 l1610 20 wherein R, is hydrogen or a substituted element or group. Examples are o-amino thiophenol, 20 o-o' diamino-diphenyl disulphide, o-o’ diamino diphenyl monosulphide, p-amino thiophenol, p-p’ diamino-diphenyl monosulphide, m-amino thio 25 phenol, m.m’-diamino-diphenyl disulphide, m.m'-diamino diphenyl monosulphide, o-p’-di amino diphenyl disulphide, o-p’-diamino di phenyl sulphide and halogen and/or alkyl nu clear~substituted derivatives thereof. The salts 30 and acyl derivatives of the amino thiophenols may also be used, as where the hydrogen of the sulfhydryl group is replaced by metal or an acyl group. 25 168 hrs. in oxygen bomb (300 oxygen maintained at 60° C.) 605 The following example is given to illustrate‘ 35 preferred aspects of the invention and is not to be construed as limiting thereof. The parts given are parts by Weight. T stands for tensile in pounds per square inch at break, and E stands for percent elongation at break. The stock that 40 is tested for scorching properties, and tensiles before and after ageing is a tire tread stock. Parts 1737 1592 35 1412 It will be observed that the initial cure, as shown by the scorch test, is retarded by use the combination in B. Also that the optimum cure is reached at about the same time as with in ageing properties. Instead of mercaptobenzothiazole, its disul Stock A 1567 1825 the full amount of mercaptobenzothiazole (stock A) which shows that an economy in use of the thiazole accelerator may be obtained by the pres ent invention and further with an improvement 45 Example 1 45 565 452 452 385 30 B phide, mercapto-benzo-thiazole-disulphide (di Smoked sheets _____ _ _ 50 Carbon black Zinc oxide Pine tar__ Sulphur _______ -_ __ Zinc soap oi cocoanut oil acids _____________ _ _ Mercaptobenzothiazole ___________________ ._ ,__ _ 0.00 100. 00 2.00 42.00 10. 00 3. 50 10.00 3. 50 3.25 3. 25 4. 00 4. 00 1. 25 . 30 0-0 ’-diamino diphenyl disulphide ________________________ _. . 90 benzothiazyl disulphide) may be used, as well as other well known thiazole accelerators which are derivatives, substitution products or salts of mer captobenzothiazole illustrated by dinitro phenyl ester of mercaptobenzothiazole, benzoyl benzo thiazyl sulphide, etc. The amount of activator usable may vary from 55 2 2,130,242 that speci?cally shown. Generally it is usable in amount of an activator therefor having the gen-v the same proportions as prior art activators of organic accelerators. The term rubber is to be construed broadly as including caoutchouc, bal eral formula ata, gutta percha, rubber isomers, synthetic rubher, and is applicable to latex whether naturally occurring or arti?cially preferred. The activators may be used with different types of stock than that illustrated, with other com 10 pounding ingredients and other proportions of where R. is H or the grouping within the paren thesis the proportion of activator being greater than the proportion of the sulphide accelerator. 10 2. A process of producing a vulcanized rubber ingredients. In the case of white stocks the acti vator is substantially non-discoloring which is product which comprises incorporating in rubber another attribute of this invention. prior to vulcanization a vulcanizing agent, an arylene thiazyl sulphide accelerator and a sub - Having thus described my invention, what I 15 claim and desire to protect by Letters Patent is: l. A process of producing vulcanized rubber stantially pure diamino-diphenyl sulphide in 15 which the proportion of the diphenyl sulphide goods which comprises accelerating the vulcani preponderates over the proportion of the sul zation of a vulcanizable rubber stock with an phide accelerator. arylene thiazyl sulphide accelerator and an added WILLIAM E. MESSER.