The Dow Chemical Company

Minnesota Mining and Manufacturing Company

University of Akron

3m Innovative Properties Company

Kurt C Frisch, Jr

Michele R Lock

Joseph P Kennedy

Richard G Hansen

Ian R Owen

Ashok Sengupta

Bruce H Edwards

Lowell W Holland

Robert F Harris

Fidelis C Onwumere

Edward R Falardeau

Gregory J Stuk

This invention provides aqueous dispersions of externally chain extended polyurethane compositions terminated by hydrolyzable and/or hydrolyzed silyl groups and containing anionic solubilizing or emulsifying groups, particularly carboxyl groups. The invention also provides methods of making both anionically and cationically stabilized polyurethane dispersions. This invention further provides polyurethane dispersions which are substantially organic solvent free, (e.g. less than about 7 weight percent organic solvent) which cure to water and solvent resistant, tough, scratch resistant, preferably light stable (non-yellowing) polyurethane films. Such films are particularly useful as coatings for wood substrates, including wood floorings, furniture, and marine surfaces.

Room temperature curable silane-terminated polyurethane dispersions

This invention provides aqueous dispersions of externally chain extended polyurethane compositions terminated by hydrolyzable and/or hydrolyzed silyl groups and containing anionic solubilizing or emulsifying groups, particularly carboxyl groups. The invention also provides methods of making both anionically and cationically stabilized polyurethane dispersions. This invention further provides polyurethane dispersions which are substantially organic solvent free (e.g. less than about 7 weight percent organic solvent) which cure to water and solvent resistant, tough, scratch resistant, preferably light stable (non-yellowing) polyurethane films. Such films are particularly useful as coatings for wood substrates, including wood floorings, furniture, and marine surfaces.

Ungelled, aqueous dispersions of silane-terminated partially crosslinked polyurethane polymers are described which are the reaction product of A) an isocyanate-containing prepolymer formed from: (i) a molar excess of organic polyisocyanate sufficient to promote substantially equal access to isocyanate groups; (ii) active hydrogen-containing material; (iii) sterically hindered amines; (iv) emulsifying monomer; B) chain-extending monomer; C) an organic compound having a pKb of at most about 7; and D) a silane coupling agent represented by the general formula ASi(OR.sup.2).sub.3 and present in an amount sufficient to partially crosslink the polyurethane resin but insufficient to gel the dispersion, provide advantages over previously known polyurethanes used as surface coatings. The hindered amine allows surface coatings incorporating the polyurethanes to be easily removed by aqueous compositions having pH between about 2 and 5. Methods of making the prepolymers, polymers, and dispersions are also presented.

Polyurethanes including pendant hindered amines and compositions

This invention relates to the use of polyamine compounds having their backbone modified by the incorporation of aminocarbonyl or aminothiocarbonyl moieties as cell opening agents in the preparation of open-celled flexible polyurethane foams. Use of the polyamine compound as cell opening agent provides for improved cell opening and provides foam with acceptable physical properties.

Use of a polyamine as cell opener in polyurethane foam

Siloxane modified isocyanurate polymers are disclosed which are the reaction product of a siloxane containing polyahl and a polyisocyanate in the presence of a catalyst for a trimerization of the isocyanate to form isocyanurate rings.

Siloxane-containing polyisocyanurate

A solid catalyst composition comprising a silica or silica-treated compound and a tin catalyst compound bonded to the surface of the silica compound which is not deactivated in the presence of silica or silica-treated compounds. A process for preparing the solid catalyst by contacting a silica compound containing reactive hydroxyl groups with a tin catalyst compound at a temperature range from about 130.degree. to 165.degree. C. under dynamic conditions whereby the tin catalyst compound bonds to the silica compound. Generally, after the reaction, at least a portion of the hydroxyl groups present on the silica compound are absent and, more preferably, substantially all the isolated hydroxyl groups are absent. A urethane composition containing the solid catalyst is also provided wherein the solid catalyst is not deactivated by the addition of silica or silica-treated compounds.

Silica bonded tin urethane catalysts

A surface is coated with a mixture of (i) an aliphatic, aromatic polyisocyanate such as 1,3-bis-(1-isocyanato-1-methylethyl)benzene, and (ii) a polyactive hydrogen compound such as a poly(2-hydroxyethylacrylate), and the mixture is cured under conditions such that an adherent, solid coating is formed on the surface. The coatings of the invention have surprising gloss and lack of yellowness after exposure to ultra-violet light.

Urethane coatings from aliphatic aromatic diisocyanates

An addition polymerizable adhesive is prepared by using the reaction product of (1) an isocyanate compound (such as 2-isocyanatoethyl methacrylate) and (2) an active hydrogen compound (such as a poly(ethylene glycol)) wherein the reaction between (1) and (2) is catalyzed with a tin (II) organoester (such as stannous octoate). The adhesives of the invention have surprisingly long shelf lives compared to similar adhesives made with other catalysts.

Addition polymerizable urethane-based anaerobic adhesives made from tin

The method and production of macromolecular monomers from cationically polymerizable monomers and vinyl-substituted hydrocarbon halides is disclosed. These cationically polymerizable monomers may react in the presence of a catalyst with the hydrocarbon halide to produce a macromer retaining a polymerizable headgroup. This compound may be used in a variety of copolymerization processes with a variety of copolymerizable monomers to form graft copolymers.

Cationically polymerizable macromolecular monomers and graft copolymers

The reaction product of an ethylenically unsaturated, monofunctional isocyanate, such as isocyanatoethyl methacrylate and a polyamine, is useful as an anaerobic adhesive.

Growing community of inventors

Midland, MI, United States of America

Kurt C Frisch, Jr