Specific Gravities of Compouniding Ingredients and Rubber

Specific Gravities of Some Compounding Ingredients

Common Name	Chemical Name	Specific Gravity
6PPD	N-1,3-Dimethylbutyl-N´-phenyl-p- phenylenediamine	1.0
77PD	N,N´-Bis(1,4-dimethylpentyl)-p-phenylenediamine	0.9
ADC	Azodicarbonamide	1.7
ADPA	Acetone-diphenylamine condensation product	1.1
Alumina	Aluminium hydroxide	2.4
Aluminium silicate		2.10
Antimony trioxide		5.40
AP	Ammonium polyphosphate	1.90
BAA	Butyraldehyde-aniline condensation product	0.9-1.0
Barium sulphate		4.30
BCUP	Tert.-Butyl cumylperoxide	0.94
BDMC	Bismuth dimethyl dithiocarbamate	2.1
BHT	2,6-Di-tert.-butyl-p-cresol	1.0
BiDD	Bismuth dimethyl dithiocarbamate	2.1
Bisphenol AF	2,2´-Bis(4-hydroxyphenyl)perfluoropropane	1.64
Bitumen		1.04
BPH	2,2´-Methylene-bis(4-methyl-6-tert.-butylphenol)	1.0
BPO	Dibenzoyl peroxide	1.1-1.3
Calcined china clay		2.50
Calcium carbonate		2.65
Calcium oxide (lime)		2.19
Calcium silicate		2.10
Carbon black		1.8
Carnauba wax		0.99
CBS	N-Cyclohexyl-2-benzothiazole sulphenamide	1.27
Chalk	Calcium carbonate	2.8
China clay (kaolin)		2.60
Clay	Complex hydrated aluminium silicate	2.5
Cotton fibre		1.05
CTAB	Alkyl trimethyl ammonium bromide	1.01
CTP	N-(cyclohexylthio)phthalimide	1.3
DBP	Di-n-butyl phthalate	1.04
DBTU	N,N´-Dibutylthiourea	1.0
DCBS	N,N-Dicyclohexyl-2-benzothiazole sulphenamide	1.2
DEHP	Di-2-ethylhexyl phthalate	0.98
DETU	1,3-diethyl-2-thiourea	1.1
DHBP	2,5-Dimethylhexane-2,5-di-tert.-butyl peroxide	0.88 (liquid) 1.50 (paste; powder)
DIBP	Di-isobutyl phthalate	1.042
Dicup	Dicumyl peroxide	1.02
Diethylene glycol		1.12
DIOP	Di-isooctyl phthalate	0.98
DNPT	Dinitroso-pentamethylenetetramine	1.4
DOA	Di-2-ethylhexyl adipate	0.922
Dolomite	Calcium magnesium carbonate	2.9
DOP	Di-octyl phthalate	0.98

Common Name	Chemical Name	Specific Gravity
DOPD	N,N´-Bis(1-ethyl-3-methylpentyl)-p- phenylenediamine	0.9
DOS	Di-2-ethylhexyl sebacate	0.91
DOTG	Di-o-tolyl guanidine	1.1
DPG	N,N´-Diphenyl guanidine	1.19
DPPD	N,N´-Diphenyl-p-phenylenediamine	1.2
DPTT	Dipentamethylene thiuram tetrasulphide/hexasulphide	1.5
DPTU	1,3-Diphenyl-2-thiourea	1.3
DTBP	Di-tert.-butyl peroxide	0.8
DTDM	4,4´-Dithiodimorpholine	1.32-1.38
EFA	Formaldehyde-ammonia-ethyl chloride condensation product	1.1
ETMQ	6-Ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline	1.0
ETU	Ethylene thiourea	1.45
Factice		1.05
Graphite		2.04
HEXA, HMT	Hexamethylene tetramine	1.3
Indene-coumarone resin		1.09
IPPD	N-Isopropyl-N´-phenyl-p-phenylenediamine	1.1
Iron oxide		4.5-5.1
Lanolin		1.08
LATU	Mixed ethyl butyl thiourea	1.01
Litharge	Lead oxide	9.30
Magnesia	Magnesium oxide	2.15-3.60
Magnesite	Magnesium carbonate	3.0
MBI	2-Mercaptobenzimidazole	1.4
MbOCA	Methylene bis-orthochloroaniline	1.44
MBS	2-(Morpholinothio) benzothiazole	1.35
MBT	2-Mercaptobenzothiazole	1.4
MBTS	2,2´-Dibenzothiazyl disulphide	1.54
MDI	Diphenylmethane diisocyanate	1.22
Mica	Complex aluminium potassium silicate	2.8
Mineral oil		0.91
MMBI	4- and 5-Methyl-2-mercaptobenzimidazole	1.25
NBC	Nickel dibutyl dithiocarbamate	1.3
NDPA	N-Nitrosodiphenylamine	1.27
Neuberg Siliceous Earth	Natural mixture of quartz and kaolinite	2.6
NiDD	Nickel dimethyl dithiocarbamate	1.5-1.7
OBSH	p,p´-Oxy-bis(benzene sulphonylhydrazide)	1.4
ODPA	Octylated diphenylamine	1.0
Oleic acid		0.90
OTBG	O-Tolyl biguanidine	1.2
PAN	Phenyl-  -napthylamine	1.1
Paraffin oil		0.80
Paraffin wax		0.90
PBN	Phenyl-  -naphthylamine	1.34
PCPL	Pentachlorophenyl laurate	1.25-1.27
Pine tar		1.08

Common Name	Chemical Name	Specific Gravity
PPD	Piperidinium pentamethylene dithiocarbamate	1.2
Quicklime	Calcium oxide	3.4
Red lead	Trilead tetraoxide	3.9
Rosin		1.07
SDBC	Sodium dibutyl dithiocarbamate	1.08
SDEC	Sodium diethyl dithiocarbamate	1.08
SDMC	Sodium dimethyl dithiocarbamate	1.18
Silica	Fumed anhydrous silica	2.5
Silica	Precipitated amorphous hydrated silica	2.0
Slaked lime	Calcium hydroxide	2.3
Sodium PCP	Sodium pentachlorophenol	2.0
SPH	Styrenated phenol	1.1
Stearic acid		0.85
Sulphur		2.05
Talc	Magnesium silicate	2.80
TBBS	N-tert.-Butyl-2-benzothiazole sulphenamide	1.3
TBTU	1,1,3-Tributyl thiourea	0.94
TBUT	Tetrabutyl thiuram disulphide	1.05-1.10
TBZTD	Tetrabenzyl thiuram disulphide	1.4
TDEC	Tellurium diethyl dithiocarbamate	1.4
TETD	Tetraethyl thiuram disulphide	1.3
Titanium dioxide	Anatase	3.90
Titanium dioxide	Rutile	4.20
TMCH	1,1-Bis(tert.-butylperoxy)-3,3,5- trimethylcyclohexane	1.4
TMQ	Polymeric 2,2,4-trimethyl-1,2-dihydroquinoline	1.08
TMTD	Tetramethyl thiuram disulphide	1.42
TMTM	Tetramethyl thiuram monosulphide	1.0-1.38
TNPP	Tris(nonylphenyl) phosphite	0.98
TPT-MA	Trimethylolpropane trimethacrylate	1.25 (powder)
Tricap	Triethylene glycol dicaprylate/caprate	0.96
TSH	p-toluene sulphonyl hydrazide	1.42
TTP(TCP)	Tritolyl phosphate (tricresyl phosphate)	1.16
TXP	Trixylyl phosphate	1.15
Xanthogen sulphide	Diisopropyl xanthogen polysulphide	1.29
ZBED	Zinc dibenzyl dithiocarbamate	1.34-1.41
ZDBC	Zinc dibutyl dithiocarbamate	1.25
ZDBCX	Amine-activated zinc dibutyl dithiocarbamate	1.09
ZDEC	Zinc diethyl dithiocarbamate	1.47
ZDMC	Zinc dimethyl dithiocarbamate	1.65
ZEPC	Zinc ethylphenyldithiocarbamate	1.34
Zinc oxide		5.55
Zinc stearate		1.10
ZIX	Zinc isopropyl xanthate	1.5
ZMBT	Zinc salt of 2-mercaptobenzothiazole	1.64
ZPD	Zinc pentamethylene dithiocarbamate	1.6
ZPDX	Amine-activated zinc pentamethylene dithiocarbamate	1.5

  Specific Gravities of Rubbers

Polymer	Specific Gravity
Acrylic rubbers	1.1
Bromobutyl rubber	0.91
Butyl rubber	0.91
Chlorobutyl rubber	0.91
Chlorosulphonated polyethylene	1.11-1.28*
Epichlorohydrin copolymer	1.27
Epichlorohydrin homopolymer	1.38
Ethylene-propylene rubber	0.85
Ethylene-propylene-diene-methylene rubber (EPDM)	0.86
Ethylene-vinyl acetate copolymer	0.94
Fluorocarbon rubbers	1.41-1.86*
Polyisoprene rubber	0.92-0.93
Natural rubber	0.92-0.93
Nitrile rubbers	0.95-1.00*
Nitrile/PVC blends	1.0-1.11*
Polybutadiene rubbers	0.91-0.93
Polychloroprene rubbers	1.23-1.25*
Polynorbornene	0.96
Polysulphide rubbers	1.27-1.60*
Styrene-butadiene rubbers	0.94
High styrene SBR rubbers	1.05
* According to grade