Silicon-containing polyols

Details Silicon-containing polyols Silicon-containing polyols

1987-02-27

1988-03-22

Lilling, Herbert J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524100, 524500, 524506, 524542, 524783, 524859, 524861, 524862, 524864, 528 26, 528 28, 528 29, 528 34, C08G 7704, C08L 8300

Patent

active

047329297

ABSTRACT:
Disclosed are essentially zinc-free, organic coating compositions based on silicon-containing polyols comprising reaction products of hydrophobic polyols, organosilicon-containing materials, and higher monohydric alcohols, R-OH. The organosilicon-containing material comprises an organosilicon-containing substance free of certain functional groups attached directly to carbon and essentially free of alkali metal ions. The organosilicon-containing substance has atoms bonded directly to Si all of which are selected from O, N, and/or Cl. The organosilicon-containing substance also has moieties directly bonded to Si which are displaceable by reaction with water and/or alcohol. The reaction product is not capable of being gelled when subjected to a specific gel test, has a content of hydroxyl groups from the hydrophobic polyol ranging from 0.4 to 10 milliequivalents per gram of reaction product, has a content of groups, --OR, from the higher monofunctional alcohol ranging from 0.1 to 7 milliequivalents per gram of reaction product, and a content of the moieties directly bonded to Si which are displaceable of less than 1 milliequivalent per gram of reaction product.
The organic coating composition also contains a curing agent for for the silicon-containing polyol selected from the group consisting of an aminoplast, a phenoplast, an isocyanate, a blocked isocyanate, a semi-blocked isocyanate, a lower-alkoxy-containing silane, and a hydrolyzed lower- alkoxy-containing silane.
The coating composition is essentially free of elemental zinc and cures to an essentially organic coating.

REFERENCES:
patent: 3932339 (1976-01-01), McLeod
patent: 4413086 (1983-11-01), Chang et al.

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