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Substance:
1,4-Butanediol
CAS Number:
110-63-4
EC number:
203-786-5
1,4-Butandiol (BDO)
Addolink B is a standard chain extender for MDI-based systems.
Addolink B is 1,4-butane diol.
Addolink B acts as a crosslinking agent for the production of polyurethane elastomers (hot- and cold-curing cast systems) and of integral skin foams.
The reaction between Addolink B and isocyanates leads to the formation of the hard polyurethane segments.
The rapidity with which these hard segments are formed in the reaction mixture reduces the demolding time.
Addolink B's use also affects the physical properties of the finished product.
Addolink B has a shelf life of 24 months.
Description of Addolink B:
Addolink B is a standard chain extender / curative for the production of PUR hot / cold cast elastomers and of integral skin foams.
Chemical composition of Addolink B:
1,4-Butanediol.
Typical properties of Addolink B:
Active ingredient content: min. 99.0 %
Appearance: clear, colorless liquid
Density at 20 °C: approx. 1.02 g/cm³
Flash point: approx. 135 °C
Hydroxyl value (theoretical): approx. 1245 mg (KOH)/g
Initial boiling point: approx. 230 °C
Pour point: approx. 19.5 °C
Solubility: miscible with water, hygroscopic
Viscosity at 20 °C: approx. 72 mPa·s
Water content: max. 0.1 %
Application notes about Addolink B:
Addolink B is used as a chain extender / curative in the production of PUR ester and ether hot / cold cast elastomers and for integral skin foam.
The reaction between Addolink B and isocyanates leads to the formation of the hard polyurethane segments.
The speed with which these hard segments are formed in the reaction mixture reduces the demolding time.
Addolink B also affects the physical properties of the finished product.
Addolink B increases the material's hardness and improves the abrasion and heat resistance.
Addition of Addolink B depends on the demands to be made on the finished product and can be varied between 2 and 10 parts by weight per 100 parts by weight polyol.
As the pour point of Addolink B is relatively high, temperatures above 22 °C are needed for satisfactory processing.
Before taking up production, please ensure that the material is in liquid condition (see storage stability).
CAS No:
110-63-4
Formula:
C4H10O2
Categories:
Organic Chemistry > Alcohols, Phenols, Phenol Alcohols
Storage stability of Addolink B:
Addolink B is hygroscopic and thus to be stored in a dry place.
When Addolink B is stored in firmly closed original containers at dry conditions at approx. 25 °C, a shelf-life of 30 months from manufacturing date can be expected.
If stored Addolink B at lower temperatures the product may thicken, become cloudy or solidify at the pour point.
This process can be reversed by liquifying the product, e. g. for as short time at max. 50 °C.
After warming and generally before use, the content of the container should be thoroughly homogenised, otherwise the extremely small water content of the product becomes locally concentrated.
The Addolink B containers should be resealed tightly after use to prevent contamination by impurities and exposure to moisture.
Packing of Addolink B:
Metal cans, contents 60 kg
Metal drums, contents 200 kg
Plastic container, contents 950 kg.
Product Information:
Addolink TR is used at low ratios only (about 2 - 10% calculated on the total addition of crosslinking agent).
Addolink TR is miscible with Addolink B and Addolink R at all ratios.
The reaction between Addolink TR and polyisocyanates leads to three-dimensional crosslinking of the hard segment material; this reduces the segregation of the hard and soft segments in the elastomer.
This effect can be utilized to reduce the Shore hardness of soft elastomers.
Addolink B also improves their resistance to swelling, but reduces their tear strength.
In hard elastomers Addolink B reduces shrinkage phenomena and stress cracking.
Function of Addolink B:
Crosslinking agent for the production of polyurethane elastomers (hot- and cold-curing cast systems).
Handling & safety of Addolink B:
Relevant safety data and references as well as possibly necessary warning labels are to be found in safety data sheet.
Characteristics of Addolink B:
PSA：
40.46000
XLogP3：
-0.24880
Appearance：
viscous colourless liquid
Density：
1.0171 g/cm3 @ Temp: 20 °C
Melting Point：
20.1 °C
Boiling Point：
230 °C @ Press: 760 Torr
Flash Point：
135ºC
Refractive Index：
1.4442-1.4462
Water Solubility：
Solubility in water: miscible
Storage Conditions：
2-8ºC
Vapor Pressure：
0.015mmHg at 25°C
Vapor Density：
3.1 (vs air)
Flammability characteristics：
Lower flammable limit: 1.95% by volume; Upper flammable limit: 18.3% by volume
Safety Information
Packing level：
I; II; III
Hazard category：
6.1
wgk germany：
1
hazard class code：
R22
safety instructions：
S36
RTECS Number：
EK0525000
Marks：
Xn
Storage features：
Separated from strong oxidants.
Stability/Shelf Life of Addolink B：
Addolink B is stable.
Addolink B is combustible.
Addolink B is incompatible with strong oxidizing agents, mineral acids, acid chlorides, acid anhydrides.
Precautionary statement(s)：
P261, P264, P270, P271, P301+P312, P304+P340, P312, P330, P403+P233, P405, P501
Hazard Statements：
H302
Use and Manufacturing of Addolink B:
Butanediol and its derivatives is used in a broad spectrum of applications in the chemical industry; amongst others in the manufacturing of technical plastics,polyurethanes, solvents, electronic chemicals and elastic fibres.
Addolink B is used in the synthesis of epothilones, a new class of cancer drugs.
Addolink B is also used in the stereoselective synthesis of (-)-Brevisamide.
Addolink B's largest use is within tetrahydrofuran (THF) production, used to make polytetramethylene ether glycol, which goes mainly into spandex fibers, urethane elastomers, and copolyester ethers.
Addolink B is commonly used as a solvent in the chemical industry to manufacture gamma-butyrolactone and elastic fibers like spandex.
Addolink B is used as a cross-linking agent for thermoplastic urethanes, polyester plasticizers, paints and coatings.
Addolink B undergoes dehydration in the presence of phosphoric acid yielded teterahydrofuran, which is an important solvent used for various applications.
Addolink B acts an intermediate and is used to manufacture polytetramethylene ether glycol (PTMEG), polybutylene terephthalate (PBT) and polyurethane (PU).
Addolink B finds application as an industrial cleaner and a glue remover.
Addolink B is also used as a plasticiser (e.g. in polyesters and cellulosics), as a carrier solvent in printing ink, a cleaning agent, an adhesive (in leather, plastics, polyester laminates and polyurethane footwear), in agricultural and veterinary chemicals and in coatings (in paints, varnishes and films).
Synonyms:
1,4-Butanediol
Diol 14B
1,4-Butylene glycol
1,4-Dihydroxybutane
Sucol B
Tetramethylene glycol
1,4-Tetramethylene glycol
Tetramethylene1,4-diol
Butylene glycol
Polycure D
Dabco DBO
Vibracure A 250
NSC 406696
ZM 0025
1,4BD
14BG
Addolink B
U 7085
Bio-BDO
B 0680
732189-03-6
1204746-06-4
1400594-63-9
