Abstract:
An additive layer manufacturing method, preferably using selective laser sintering, for manufacturing a solid article, the method including applying a layer of a powder, the powder including at least one powdered (co)polymer, onto a solid substrate in a processing chamber; fusing the powder layer onto the solid substrate; subsequently depositing successive layers of the powder, wherein each successive layer is selectively fused prior to deposition of the subsequent layer of powder so as to form the article. In some embodiments, the powder further includes abrasive particles having a hardness greater than or equal to that of aluminum oxide.
Abstract:
Adhesive compositions that include polymerized units of one or more (meth)acrylate ester monomers derived from an alcohol containing 1 to 14 carbon atoms; polyvinyl acetal resin; and at least one initiator; and articles containing such compositions.
Abstract:
There is provided an article having a compliant article where the compliant article comprises an polymer layer and a first layer disposed along a first major surface of the polymer layer; and a plurality of microspheres partially embedded and adhered to a major surface of the first layer opposite the surface that is disposed along the first major surface of the polymer layer, wherein the article has a compression modulus of less than or equal to 0.5 MPa. There is also provided an article having a compliant article where the compliant article comprises a polymer layer; and a plurality of microspheres partially embedded and adhered to a major surface of the compliant article, where the article has a compression modulus of less than or equal to 0.5 MPa, and further where the article is a decorative article.
Abstract:
There is provided an article comprising at least a first surface having a fluorine-containing polymeric binder resin layer and a plurality of microspheres partially embedded in a first major surface of the binder resin layer and adhered thereto; wherein the fluorine-containing polymer is derived in part from at least one partially fluorinated, or non-fluorinated, monomer; and wherein the article exhibits a stain resistance to yellow mustard at elevated temperature and humidity as measured by the change in b* of less than 50. There are also provided such articles wherein the fluorine-containing polymer is derived in part from at least one partially fluorinated, or non-fluorinated, monomer; and wherein the fluorine content along the polymeric backbone of the fluorine-containing polymer is from about 27% to 72% by weight. There are also provided such articles wherein the article is a thermoformable article exhibiting chemical resistance according to ASTM D5402 - 06.
Abstract:
A curable composition includes: a) at least one aliphatic polyisocyanate; b) at least one aliphatic polyamine; and c) from 8 to 17 percent by weight of at least one liquid compound, based on the total weight of components a), b) and c) combined. Each liquid compound is independently represented by the formula (I): wherein Z represents an n valent organic group, and n represents an integer ≥ 1. Methods of coating the curable coating on a substrate and composite articles are also disclosed.
Abstract:
Debonding methods comprise: providing a bound article comprising, in order: a first adherend, a first primer layer, an adhesive layer, optionally a second primer layer, and a second adherend; heating the article to a release temperature; and separating the first and second adherends. At room temperature, the adhesive layer exhibits a high overlap shear of greater than 1.0 MPa (145 psi) or even greater than 5.0 MPa (725 psi), however, at release temperature, the adhesive layer exhibits an overlap shear of no more than 0.34 MPa (50 psi) or even no more than 0.21 MPa (30 psi). The release temperature may be a temperature between 100ºC and 150ºC. The adhesive layer may comprise: a first film-forming polymer or oligomer; a cured polymer comprising a polymer of a first species comprising first unsaturated free-radically polymerizable groups; a first transition metal cation; and optionally a quaternary ammonium salt.
Abstract:
A method of forming a coating on a surface of a pipeline comprises the steps of: a) providing a polyurea coating composition comprising a first part comprising at least one polyisocyanate, and a second part comprising at least one polyamine; and b) combining the first part and the second part to form a liquid mixture. The first part, second part, or liquid mixture further comprises cl) at least one inorganic filler and at least one silane compound comprising a functional group that is reactive with the first or second part; or c2) a siliceous filler having an aspect ratio of at least 2: 1; and d) applying the liquid mixture to internal surfaces of the pipeline; and e) allowing the mixture to set forming a cured coating.
Abstract:
Methods of controlling the reaction rate of a polyurea coating composition are described comprising a) providing a polyurea coating composition comprising a first part comprising at least one polyisocyanate; and a second part comprising at least one polyamine; and b) combining the first part and the second part to form a liquid mixture; wherein the first part, second part, or liquid mixture further comprises 0.5 wt.-% to 5 wt.- % water scavenger; and 0.05 to 10 wt.-% of a hydroxyl component comprising one or more reactive hydroxyl groups. In one embodiment, the method is utilized for forming a coating on a surface of a pipeline is described by applying the liquid mixture to internal surfaces of the pipeline and allowing the mixture to set forming a cured coating. Polyurea coating compositions are also described.
Abstract:
There is provided a thermoformable article comprising at least a first surface having a binder resin layer comprising a fluorine-containing polymer, where the binder resin layer has a first major surface opposite a second major surface; and a plurality of microspheres partially and adhered to the first major surface of the binder resin layer; where the fluorine-containing polymer is a partially fluorinated polymer derived from at least one fluorine containing monomer and two or more non-fluorinated monomers having at least one active hydrogen functional group, and further wherein at least one but not all of the active hydrogen functional groups are reacted with at least one curing agent having latent functionality. In some instances the curing agent comprises polyisocyanate. There is also provided a thermoset article derived from such thermoformable articles.
Abstract:
A pavement marking composition comprises an isocyanate-containing component and an amine-containing component. At least one of the components comprises plasticizer and at least one of the components comprises filler. The composition comprises about 5 wt. % or more plasticizer and is substantially free of polyaspartic ester amines.