Silcone Polyethers

Silicone Polyols are useful as surfactants, wetting agents and pigment dispersants for paints, leveling agents for coatings and thread lubricants in the textile industry. Genesee Polymer's polyols have two basic building blocks, Ethylene Oxide units (EO) and Propylene Oxide units (PO) shown below:

Ethylene Oxide (EO):
Ethyleneoxide
Propylene Oxide (PO):
Propyleneoxide

These units extend off the silicone chain as the following diagram shows:

Polyols

This chain can be either polyoxyethylene (n=0), polyoxypropylene (m=0) or a random mixture of polyoxypropylene and polyoxyethylene (m>1, n>1). The R group represents the type of cap on the polyether chain.  R can be either a methyl or butyl group for example or if the polyether is uncapped, R is simply a hydrogen atom.

Rake (Pendant)

One of the most common types of silicone polyols is the pendant or rake structure polyol. These are a randomly distributed dimethyl/silicone polyol copolymer with this general structure where R is the capping group. The selection charts below list all of the pendant (rake) structure polyols that Genesee Polymers offers. These are organized by polyol type and listed from lowest to highest molecular weights. 

Silicone Polyethers

Polyoxyethylene (EO) Rake Structure Polyols (n=0)

Product Molecular Weight (Calculated) Wt. % Silicone End-Cap
GP-805
622 amu
39%
Methoxy
GP-217
3800 amu
33%
Methoxy
GP-226
4300 amu
42%
Methoxy
GP-219
6500 amu
58%
Methoxy
GP-1009
6725 amu
50%
None

Polyoxyethylene/Polyoxypropylene (EO/PO) Rake Structure Polyols (m,n>1)

Product Molecular Weight (Calculated) Wt. % Silicone Viscosity (cPs) @ 25°C End-Cap
GP-209
7800 amu
15%
1000 cP
Butoxy
GP-215
9800 amu
18%
800 cP
Butoxy
GP-214
11500 amu
31%
6000 cP
Butoxy

Polyoxypropylene (PO) Rake Structure Polyols (m=0)

Product Molecular Weight (Calculated) Wt. % Silicone Viscosity (cPs) @ 25°C End-Cap
GP-218
11000 amu
32%
1500 cP
Butoxy

Alpha Omega Block

Alpha omega silicone polyethers are applicable where a large molecular mobility is required. This includes additives for leveling and flow control of high speed printing inks. The selection charts below list all of the ABA Block Structure polyols that Genesee Polymers offers. These are organized by polyol type.

alpha omega block copolymers

Polyoxyethylene (EO) ABA Block Structure Polyols (n=0)

Product Molecular Weight (Calculated) Wt. % Silicone Viscosity (cPs) @ 25°C End-Cap
GP-690
3200 amu
63%
600 cP
None

Polyoxyethylene/Polyoxypropylene (EO/PO) ABA Block Structure Polyols (m,n>1)

Product Molecular Weight (Calculated) Wt. % Silicone Viscosity (cPs) @ 25°C End-Cap
GP-675
8000 amu
63%
1000 cP
None

Polyoxypropylene (PO) ABA Structure Polyols (m=0)

Product Molecular Weight (Calculated) Wt. % Silicone End-Cap
GP-905
5200 amu
35%
Butoxy