Modifications of hydrosiloxane polymers for coating applications

An alternative approach to the formation of resins by hydrolysis-condensation reactions was developed and evaluated. It combines the use of inexpensive polysiloxanes and transition metal catalysts to modify polymers easily in a one-pot reaction. Polyhydridomethyisiloxane (PHMS) serves as the base po...

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Bibliographic Details
Published in:Surface coatings international : JOCCA : journal of the Oil and Colour Chemists' Association 2001, Vol.84 (1), p.27-33
Main Authors: BLUM, Y. D, MACQUEEN, D. B
Format: Article
Language:English
Subjects:
Applied sciences
Chemical modifications
Coatings. Paints, varnishes and inks
Components, formulation
Exact sciences and technology
Inorganic and organomineral polymers
Physicochemistry of polymers
Polymer industry, paints, wood
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Summary:An alternative approach to the formation of resins by hydrolysis-condensation reactions was developed and evaluated. It combines the use of inexpensive polysiloxanes and transition metal catalysts to modify polymers easily in a one-pot reaction. Polyhydridomethyisiloxane (PHMS) serves as the base polymer and it can be cured or modified by dehydrocoupling or a combination of hydrosilylation-dehydrocoupling reactions, both catalyzed by transition metal catalysts (Platinum and Ruthenium). The modified polymers are linear and contain Si-OH and combinations of Si-OH and Si-OR pendant groups. These groups assist the bonding to surfaces when the modified polymers are deposited as coatings. They then cure by condensation and hydrolysis-condensation reactions, catalyzed by both acids and bases. The modified polymers are used for low-temperature paint-like applications, especially where ambient curing is desirable. Discusses modifications of PHMS for coating applications and describes potential coating applications and typical coating strategies. (Original abstract)
ISSN:1476-4865
1356-0751
DOI:10.1007/BF02699693