Rubber vulcanizing agents comprising reaction products of sulfur and unsaturated hydrocarbons

Patent · Tue Apr 26 00:00:00 EDT 1988

OSTI ID:6951029

Johansson, A H; Woodruff, D; Flanders, S K; Swigert, J L

A process for making an improved vulcanizing agent is described comprising the steps of: A. providing starting materials consisting essentially of sulfur and an unsaturated reactant selected from at least one of d-limonene, 5-ethylidene-2-norbornene, styrene, and dicyclopentadiene; B. reacting the starting materials at a first temperature greater than the melting point of the sulfur and less than the temperature at which the sulfur begins to be converted to insoluble sulfur until substantially all of the unsaturated reactant is consumed, forming an intermediate product; C. maintaining the intermediate product at a second temperature greater than the melting point of the sulfur and the same as or different from the first temperature for a sufficient time to form an end product which is dispersible in rubber and provides less sulfur bloom than insoluble sulfur when incorporated in a rubber composition; and D. terminating the maintaining step by reducing the temperature of the end product, thereby maintaining the dispersibility of the end product in rubber.

• Assignee: Morton Thiokol, Inc., Chicago, IL
• Patent Number(s): US 4740559
• OSTI ID: 6951029
• Resource Relation: Patent File Date: Filed date 30 Sep 1985
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
RUBBERS
VULCANIZATION
ADDITIVES
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
CHEMICAL REACTION YIELD
HYDROCARBONS
PENTADIENES
STYRENE
SULFUR
ALKYLATED AROMATICS
AROMATICS
DIENES
ELASTOMERS
ELEMENTS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYENES
POLYMERS
SYNTHESIS
YIELDS
400201* - Chemical & Physicochemical Properties