American Cyanamid Company

Cytec Technology Corporation

Other

Howard R Lucas

Kuang-Jong Wu

Michael M Fisher

Leroy A White

David A Ley

Robert G Lees

William F Jacobs, Iii

Herbert Burkhard

Robert Gerald Lees

Nicholas J Albrecht

New and improved curable compositions useful as non-yellowing, acid resistant coatings for a variety of substrates and as adhesives and binders are disclosed. The curable compositions comprise a polymeric component comprising poly(C.sub.1 -C.sub.6 alkyl acrylamidoglycolate) functional units and poly (active hydrogen) functional units and preferably an effective amount of a protic acid crosslinking catalyst. In preferred embodiments acid-catalyzed room temperature curable coating compositions are provided. The compositions may be cured effectively at lower temperatures without the use of amines or other toxic crosslinking agents and do not liberate formaldehyde on curing. A method for making poly(C.sub.1 -C.sub.6 alkyl acrylamidoglycolate) functional polymers is also disclosed.

Polymeric curable compositions containing alkylacrylamidoglycolates

Provided is an aqueous-dispersible, self-crosslinkable interpenetrating polymer network composition which comprises an aqueous-dispersible, isocyanate-based thermoplastic polymer containing urethane and/or urea linkage and an interpenetrating polymer containing latent reactive functionality, whereby the two polymers are at least partially entangled with each other on a molecular level. Also provided are aqueous dispersions of such self-crosslinkable interpenetrating polymer networks, methods of producing such aqueous dispersions, coating compositions therefrom and coated substrates and films obtained from it.

Interpenetrating polymer network compositions

Low molecular weight crosslinking agents useful in coatings based on esters of acrylamidoglycolate ethers are disclosed. The copolymeric crosslinking agents of the invention are prepared by copolymerizing a reactive acrylamidoglycolate monomer such as MAGME.RTM. methyl acrylamidoglycolate methyl ether with comonomers such as methyl methacrylate or butyl acrylate. The process of preparing the copolymeric crosslinkers of the invention makes use of chain transfer agents to limit the molecular weight of the crosslinking agents to 10,000 or less.

Low molecular weight acrylamidoglycolate crosslinker and process

A process for the preparation of novel grafted latexes having backbones formed from unsaturated monomers and having pendent isocyanate containing sidechains derived from isopropenyl-alpha, alpha- dimethylbenzyl isocyanate or copolymers thereof is described. Grafting latexes is carried out using a free radical redox initiator system in an aqueous medium. Latexes such as polybutadiene, polyvinyl chloride, and polyvinyl chloride-acrylic copolymers are converted to the corresponding isocyanate-functional latexes by the process of the invention. The isocyanate-functional grafted and cografted latexes described are useful in curable compositions.

Low temperature process for the preparation of isopropenyl-alpha,

A novel, one component self-crosslinking resin and a process for its preparation are provided. The resin is the copolymer of:

N-hydroxysuccinimide-blocked isopropenyl-alpha, alpha-dimethylbenzyl

An improved process for preparing a one component self-crosslinking resin is provided. The process for making the self-crosslinking resin is carried out by copolymerizing an oxime-blocked m-isopropenyl-alpha, alpha-dimethylbenzyl isocyanate (m-TMI), hydroxyethyl acrylate, and another unsaturated monomer at 75.degree. C. to 85.degree. C. in a polar organic solvent having a dipole moment of at least 3, such as acetonitrile. The polar solvent retards the thermal deblocking of the blocked TMI, thereby preventing the premature self-crosslinking and gelation of the copolymerization product prior to its use as a self-crosslinking resin.

Process for the preparation of gel-free self-crosslinking copolymers

Novel grafted polymers having backbones formed from unsaturated monomers and having pendent isocyanate containing sidechains derived from isopropenyl-alpha,alpha-dimethylbenzyl isocyanate or copolymers thereof are described. Curable coating and molding compositions employing the novel grafted polymers of the invention in combination with isocyanate reactive materials are also described.

Isopropenyl-alpha,alpha-dimethylbenzyl isocyanate - grafted polymers

Novel grafted polymers having backbones formed from unsaturated monomers and having pendent isocyanate containing sidechains derived from isopropenyl-alpha, alpha-dimethylbenzyl isocyanate or copolymers thereof are described. Curable coating and molding compositions employing the novel grafted polymers of the invention in combination with isocyanate reactive materials are also described.

Isopropenyl-alpha, alpha-dimethylbenzyl isocyanate--grafted polymers

Compositions comprising an amine-reactive vinyl polymer and a polyfunctional amine crosslinker when combined with a benzotriazole or a polypyridyl, alone, or in further combination with 2-hydroxypyridine cure into coatings having superior corrosion resistance.

Curable compositions and corrosion resistant coatings prepared therefrom

A low temperature cure, pigmented coating composition is provided. This coating composition includes a crosslinkable, solvent borne, solution polymer containing certain activated ester groups, and an amine/aminal equilibrium mixture. Also provided is a coating with improved gloss obtained by curing this pigmented composition.

Low temperature cure, pigmented coated composition

Acrylic multipolymer-vinyl chloride polymer compositions are rendered flame-retardant by the incorporation therein of dicyclopentadienyl iron or chromium acetyl acetonate.

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Danbury, CT, United States of America

Howard R Lucas