DIPHENYL GUANIDINE

PRODUCT IDENTIFICATION
CAS NO. 102-06-7
24245-27-0 (monohydrochloride)
52392-53-7 (hydrochloride)

DIPHENYL GUANIDINE
EINECS NO. 203-002-1
FORMULA C6H5NHC(=NH)NHC6H5
MOL WT. 211.27

H.S. CODE

 2925.29.1800

TOXICITY

 Oral rat LD50: 375 mg/kg
SYNONYMS 1,3-Diphenylguanidine; DPG; 1,3-Difenylguanid;
Melaniline; N,N'-Diphenylguanidine; Nocceler D; s-Diphenylguanidine; Dwufenyloguanidyna; Melaniline; Vulkacit D; (Other CAS RN: 25323-69-7; 33505-70-3; 39291-21-9; 55556-10-0);
SMILES c1(NC(Nc2ccccc2)=N)ccccc1

CLASSIFICATION

Vulcanization accelerator

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE White to pale pink powder

MELTING POINT

 148 C
BOILING POINT 170 C (Decomposes)
SPECIFIC GRAVITY 1.15

SOLUBILITY IN WATER

 1 mg/ml
VAPOR DENSITY  
pKa 10.12 (Dissociation Constant at 20 C)
log Pow 2.89 (Octanol-water)
VAPOR PRESSURE 8.45E-06 (mmHg at 25 C)
HENRY'S LAW 7.12E-12 (atm-m3/mole at 25 C)
OH RATE 8.53E-11 (cm3/molecule-sec at 25 C Atmospheric )
AUTOIGNITION

 

REFRACTIVE INDEX

 

NFPA RATINGS Health: 2; Flammability: 0; Reactivity: 0
FLASH POINT

 

STABILITY Stable, Sensitive to moisture

GENERAL DESCRIPTION & APPLICATIONS
Guanidine, also called carbamidine, is a strongly alkaline and water-soluble compound, NHC(NH2)2 It is formed by the oxidation of guanine in urine as a normal product of protein metabolism in the body. In industry, guanidine, containing nitrogens and N=C solid bond, and its modified derivatives are versatile intermediates used in the manufacture of plastics, resins, rubber chemicals, nitroguanidines (explosives), photo chemicals, fungicides, and disinfectant. It has also biotechnological application of protein separation, purification and as a protein denaturant. It can be used as an oxygen scavenger to prevent corrosion damage. It is used as a component of rocket propellants because it produce a large amount of heat when burned.

Diphenylguanidine is one of common accelerators for the vulcanization of rubber in combination with thiazoles and sulfenamides. Though it does not show better activity than thiuram and dithiocarbamates, it has better stability. It is used as a complexing agent for the detection of metals and organic bases. It is used as a secondary foam stabilizer in the silicoflouride foam process.

http://www.faqs.org/
The present invention relates to a rubber composition, more particularly relates to a rubber composition capable of improving the unvulcanized properties (e.g. Mooney viscosity and scorch resistance) of the rubber composition, capable of improving the viscoelastic properties and abrasion resistance of the vulcanized rubber, and enabling the simple production thereof, without compounding diphenyl guanidine (DPG) or while reducing the amount of DPG.

http://www.epa.gov/
This chemical has an aggregated production and/or import volume in the U.S. of 1 million to 10 million pounds. Non-confidential IUR information indicates that the industrial processing and uses of the chemical include process regulators in vulcanization or polymerization processes. Nonconfidential information in the IUR indicates that the commercial and consumer products containing the chemical include rubber and plastic products. Information from the HSDB indicates that this chemical is primarily used as a vulcanization accelerator for rubbers.

http://www.astm.org/
ASTM's rubber standards are instrumental in specifying, testing, and assessing the physical, mechanical, and chemical properties of a wide variety of materials and products that are made of rubber and its elastomeric derivatives. Rubber, which can either be synthetically produced or derived from the milky colloidal suspension found in the sap of some plants, exhibits unique properties that render it extensively useful in many applications and products. These rubber standards allow rubber manufacturers and end-users to examine and evaluate their material or product of concern to ensure quality and acceptability towards safe utilization.
SALES SPECIFICATION

APPEARANCE

 White to pale pink powder
ACTIVE CONTENT

96.0% min

MELTING POINT

146 C min

ASH

0.3% max

HEAT LOSS

0.3% max

FINENESS

99.9% (100 mesh)

COPPER (as Cu)

0.001% max

MANGANESE (as Mn)

0.0001% max

NITROGEN

19.0% (Typical)

PARAFIN OIL

1.0 -2.0%

TRANSPORTATION
PACKING III
HAZARD CLASS 9
UN NO. 8027

SAFETY INFORMATION

Hazard Symbols: XN N, Risk Phrases: 22-36/37/38-51/53-62, Safety Phrases: 26-36/37/39-61
GENERAL DESCRIPTION OF ACCELERATOR

Sulfur combines with nearly all elements. Sulfur forms ring and chain structures as it is the second only to carbon in exhibiting catenation. The 8-membered ring and shorter chain structure of sulfur molecule is important in vulcanization process which individual polymers are linked to other polymer molecules by atomic bridges. This process produces thermoset materials which are cross-linked and irreversible substances. The term thermoplastic is for high molecular weight polymers which can undergo melting-freezing cycle. Thermosets are not melted and re-molded on heating after cured. The split of sulfur 8-membered ring structure into shorter chains provides rubber vulcanization process. The split are liked with cure sites (some of the solid bonds in the molecule) on rubber molecules, resulting in forming sulfur bridges typically between 2 and 10 atoms long. Vulcanization makes rubber harder, more durable and more resistant to heating, aging and chemical attacks. The number of sulfur atoms in the sulfur bridges varies physical properties of the end products. Short bridges containing one or two sulfur atoms offer heat resistance and long bridges offer flexible property. Vulcanization can also be accomplished with certain peroxides, gamma radiation, and several other organic compounds. The principal classes of peroxide cross-linking agents are dialkyl and diaralkyl peroxides, peroxyketals and peroxyesters. Other vulcanizing agents include amine compounds for the cross-linking of fluorocarbon rubbers, metal oxides for chlorine-containing rubbers (notably zinc oxide for chloroprene rubber) and phenol-formaldehyde resins for the production of heat-resistant butyl rubber vulcanizates. Accelerator, in the rubber industry, is added with a curing agent to speed the vulcanization. Accelerators contain sulfur and nitrogen like derivatives of benzothiazole and thiocarbanilides. The popular accelerators are sulfenamides (as a delayed-action accelerators), thiazoles, thiuram sulfides, dithocarbamates and guanidines.

There are some types of rubber accelerators. They are used in combination with each other in accordance with vulcanizing and/or acid-base conditions. Some examples classified by chemical structure are as below;

  • Thiazole
    • 2-Mercaptobenzothiazole (CAS #: 149-30-4)
    • Dibenzothiazole disulfide (CAS #: 120-78-5)
    • 2-Mercaptobenzothiazole Zinc salt (CAS #: 155-04-4)
  • Sulphenamide
    • N-Cyclohexyl-2-benzothiazole sulfenamide (CAS #: 95-33-0)
    • N-Oxydienthylene-2-benzothiazole sulfenamide (CAS #: 102-77-2)
    • N-tert-butyl-2-benzothiazyl sulfenamide (CAS #: 95-31-8)
  • Guanidine
    • Diphenyl guanidine (CAS #: 102-06-7)
    • Di-o-tolylguanidine (CAS #: 97-39-2)
  • Thiuram
    • Tetramethyl thiuram disulfide (CAS #: 137-26-8)
    • Tetraethyl thiuram disulfide (CAS #: 97-77-8)
    • Tetramethyl thiuram monosulfide (CAS #: 97-74-5)
    • Isobutyl thiuram disulfide (CAS #: 3064-73-1)
    • Tetrabenzylthiuram disulfide (CAS #: 10591-85-2)
    • Dipentamethylene thiuramtetrasulfide (CAS #: 120-54-7)
  • Dithiocarbamate
    • Zinc dimethyl dithiocarbamate (CAS #: 137-30-4)
    • Zinc diethyl dithiocarbamate (CAS #: 14324-55-1)
    • Zinc dibutyl dithiocarbamate (CAS #: 136-23-2)
    • Zinc N-ethyl-dithiocarbamate (CAS #: 14634-93-6)
    • Zinc dibenzyl dithiocarbamate (CAS #: 14726-36-4)
    • Copper dimethyl dithiocarbamate (CAS #: 137-29-1)
  • Thiourea
    • Ethylene thiourea (CAS #: 96-45-7)
    • N,N'-Diethylthiourea (CAS #: 105-55-5)
    • N-N'-Diphenylthiourea (CAS #: 102-08-9)

PRICE INFORMATION