Cytec Industries Inc.

Cytec Technology Corporation

Dalip Kumar Kohli

Junjie Jeffrey Sang

Leonard A MacAdams

Yiqiang Zhao

Kunal Gaurang Shah

Jonathan Edward Meegan

Fiorenzo Lenzi

Kevin R Mullery

Gaurang Kunal Shah

Leonard Macadams

Keltoum Ouzineb

Elaine Dickerson

Leonard A Macadams

A surfacing material that can provide improved UV resistance while providing good surface properties. The surfacing material includes a resin layer formed from a curable resin composition containing: (A) one or more cycloaliphatic epoxy resin(s), each having two or more epoxy groups per molecule; (B) an epoxy-amine adduct having two or more epoxy groups per molecule and obtained by a reaction of (i) an epoxy compound having two or more alicyclic epoxy groups per molecule with (ii) an amine compound having two or more amino groups per molecule; (C) a curing agent and/or a catalyst; (D) ceramic microspheres; and (E) a flow control agent in the form of inorganic particles, which are not ceramic microspheres.

UV resistant surfacing materials for composite parts

Disclosed herein is a solvent-based bonding primer composition containing one or more organic solvents, one or more epoxy resins, one or more curing agents, a silane compound, and a low amount of core-shell rubber particles in nanometer size, submicron or micron size. Also disclosed is a method of applying the solvent-based bonding primer composition onto a metallic surface of a first substrate prior to bonding the metallic surface to a second substrate via a curable adhesive.

Primer composition for adhesive bonding and method of using the same

A low-density, halogen-free epoxy composition that is flame-resistant upon curing and is suitable for use as a potting compound. The epoxy composition includes: (a) an epoxy component; (b) at least one curative; (c) at least one latent curing accelerator; (d) a toughening component that includes nano-sized core shell rubber (CSR) particles having particle size of less than 1 micron; (e) a fire-retardant component that is halogen-free; and (f) hollow microspheres for reducing the density of the composition. The fire-retardant component includes a mixture of: (i) at least one polyphosphate; (ii) at least one metal borate; and (iii) at least one compound selected from alkaline earth metal hydroxides and aluminum hydroxides.

Flame-retardant epoxy composition and method of using the same

A surfacing material that is capable of ultraviolet (UV) protection and self-releasing from a mold surface. The surfacing material is a multilayer structure composed of a curable resin layer laminated to a self-releasing layer. The surfacing material is designed to be co-cured with a composite substrate, for example, a prepreg layup. After co-curing, the composite part surfaced with the surfacing material is releasable from the mold surface with ease. The self-releasing layer functions as a UV blocking layer until the cured composite substrate is ready for painting. When the self-releasing layer removed, a paint-ready surface is revealed. Such surface does not require any surface preparation prior to painting.

Self-releasing, UV blocking surfacing materials for composite parts

A surfacing material that is mold-releasable and electrically conductive. This surfacing material can be co-cured with a curable composite substrate and can be in contact with a mold surface such that when the cured composite part is removed from the mold, the surfacing material is releasable from the mold with ease. The mold-releasable surfacing material can effectively eliminate the need for mold release agents and mold surface preparation.

Mold-releasable surfacing materials for composite parts

A multifunctional surfacing material capable of providing lightning strike protection (LSP) and burn-through resistance. In one embodiment, the multifunctional surfacing material is composed of a conductive layer positioned between two resin layers, at least one of which contains one or more fire retardant compounds. In another embodiment, the multifunctional surfacing material is composed of a conductive layer positioned between two resin layers one of which is a thermally-stable layer. The surfacing material is co-curable with a composite substrate, e.g. prepreg or prepreg layup, which contains fiber-reinforced matrix resin.

Multifunctional surfacing material with burn-through resistance

A surfacing material that is capable of ultraviolet (UV) protection. The surfacing material is a multilayer structure composed of a woven peel ply fabric interposed between a first curable resin layer and a second curable resin layer. The surfacing material is designed to be co-cured with a composite substrate, for example, a prepreg layup. Upon curing, the peel ply fabric combined with the outer thermoset layer function as a UV protective layer. When the peel ply fabric and the outer thermoset layer are removed, a paint-ready surface is revealed. Such surface does not require any surface preparation prior to painting.

UV protective surfacing materials for composite parts

Multifunctional surfacing materials for use in composite structures are disclosed. According to one embodiment, the surfacing material includes (a) a stiffening layer, (b) a curable resin layer, (c) a conductive layer, and (d) a nonwoven layer, wherein the stiffening layer (a) and the nonwoven layer (d) are outermost layers, and the exposed surfaces of the outermost layers are substantially tack-free at room temperature (20&#xb0; C. to 25&#xb0; C.). The conductive layer may be interposed between the curable resin layer and the stiffening layer or embedded in the curable resin layer. According to another embodiment, the surfacing material includes a fluid barrier film between two curable resin layers. The surfacing materials may be in the form of a continuous or elongated tape that is suitable for automated placement.

Surfacing materials for composite structures

A bonding method for joining two structural parts using a curable adhesive layer having a fibrous veil embedded therein. The fibrous veil carries a polymeric binder, which is in a solid phase at room temperature (20&#xb0; C.-25&#xb0; C.) and is capable of dissolving into the adhesive composition during curing thereof.

Toughened adhesive and bonding method using the same

A method for surface preparation of a composite substrate prior to adhesive bonding. The surface preparation method includes applying a resin-containing peel ply onto a composite substrate, followed by co-curing. The resin-containing peel ply contains a non-removable textile carrier and a removable woven fabric embedded therein. After co-curing, the peel ply is removed from the composite substrate such that the removable woven fabric is removed but the non-removable textile carrier and a film of residual resin remain on the composite substrate, thereby creating a modified, bondable surface on the composite substrate. The composite substrate with the modified surface can be bonded to another composite substrate, whereby the textile carrier remains an integrated part of the final bonded structure.

Peel ply for surface preparation and bonding method using the same

Peel ply for surface preparation and a method of surface preparation prior to adhesive bonding. A resin-rich peel ply is applied onto a curable, resin-based composite substrate, followed by co-curing. After co-curing, the composite substrate is fully cured but the matrix resin in the peel ply remains partially cured. When the peel ply is removed, a roughened, bondable surface with chemically-active functional groups is revealed. The composite substrate with the chemically-active, bondable surface may be bonded to another composite substrate to form a covalently-bonded structure.

Bonding of composite materials

A water-based bonding primer composition and a method of applying the same onto a metallic surface prior to adhesive bonding. The bonding primer composition is a water-based dispersion containing water, one or more epoxy resins, at least one curing agent, a silane compound, a low amount of a carbon-based material in particulate form, and optional additives. The carbon-based material is selected from graphene, graphene oxide (GO), graphite, carbon with various structures in micron-scale or nanoscale size, and combination thereof.

Growing community of inventors

Churchville, MD, United States of America

Dalip Kumar Kohli