Abstract:
A radiation-curable composition for use as an optical fiber material or coating comprising the combination of the following pre-mixture ingredients:(A) about 5 wt. % to about 95 wt. % of one or more radiation-curable oligomers,(B) about 5 wt. % to about 95 wt. % of one or more monomer diluents,(C) optionally, one or more photoinitiators,(D) about 0.1 wt. % to about 30 wt. % of one or more adhesion promoters represented by:(R.sup.1 --L).sub.4-X --Si(OR.sup.2).sub.Xwherein R.sup.1 is a group comprising an ethylenically unsaturated radiation-curable group; and said three R.sup.2 groups independently of each other are C.sub.1 -C.sub.10 groups; wherein X=1-3; and L is a linking group which comprises one or more alkoxy or branched propoxy groups.
Abstract:
Curable composition comprising a stable, water dispersible, curable polymer containing a sterically hindered alkoxylated silane group at 0.1 to 75 weight percent of the total composition; a water dispersible or water soluble, hydrolytically stable organotin catalyst, at 0.1 to 10 weight percent of the total composition; and water at 99.8 to 24.9 weight percent of the total composition are taught herein. These compositions are useful as adhesives, sealants and paints. The compositions have improved properties including solvent resistance, adhesion, hardness, abrasion resistance and mar resistance. Particular catalysts for use herein include mercaptoalcohol, mercaptide and sulfide forms of diorganotins having either a Sn--S or Sn.dbd.S bond, and include dibutyltin dimercaptide and dibutyltin bis(1-thioglycerol).
Abstract:
Stable alkoxy silane containing compositions and methods for the preparation of a stable silane containing compositions comprising: (I) a water insoluble or slightly soluble alkoxy silane; (II) emulsifier; (III) water; and (IV) water dispersible or emulsified polymer containing an alkoxy silane functional group. Also provided are two part systems such that an alkoxy silane emulsion comprising components (I)-(III) are combined and the component (IV) may be added upon use of components (I) to (III). Moreover, additional components, (V), such as catalysts and pH buffers may be added.
Abstract:
A composition suitable for the production of an antifouling coating which comprises: (A) a polymer carrying pendent and/or terminal curable functional groups, at least a major proportion of the repeating units in the polymer (A) being other than siloxane units and (B) a curable organohydrogen polysiloxane or polydiorganosiloxane, the curable functional groups in component (A) being capable of undergoing a condensation curing reaction with component (B). The composition provides antifouling coating having good adhesion and mechanical durability and are used in aquatic or marine environments.
Abstract:
The invention provides a water-based coating composition in two pack form comprising:i) in a first pack a substantially non-aqueous solution of a silicon-containing polymer which is soluble in water miscible organic solvents and essentially soluble in aqueous media, the silicon groups on the polymer being of formula (1):--SiR.sup.1.sub.a R.sub.3-a (1) in which a is 0 to 2, R.sup.1 is Cl-6 alkyl and R is OH or a hydrolysable group, andii) in a second pack a polymer in dispersion in an aqueous liquid carrier for the composition,where the non-volatile binder solids content of the composition is at least 5% by weight and the molar concentration of silicon in the composition is greater than 0 and less than 0.5.
Abstract:
A coating composition comprising:(A) 100 parts by weight of a vinyl polymer having on the main polymer chain end or a side chain thereof at least one silyl group containing a silicon atom to which a hydrolyzable group is linked, per one polymer molecule, the main chain of the vinyl polymer consisting essentially of a polymer of a vinyl monomer,(B) 0 to 10 parts by weight of a curing catalyst,(C) 0 to 10 parts by weight of a hydrolyzable ester compound, and(D) 0.5 to 100 parts by weight of a dialkyl ester of dibasic acid having the formula (1): ##STR1## The coating composition of the present invention has excellent adhesion to under coats, and therefore it is suitable for use as automotive refinishing paints and industrial coatings.