摘要:
A reaction system for forming a viscoelastic polyurethane foam includes an isocyanate component and an isocyanate-reactive component that includes at least a polyol component, an additive component, and a preformed aqueous polymer dispersant. The mixture includes 50.0 wt% to 99.8 wt% of the polyol component, 0.1 wt% to 49.9 wt% of the additive component, and 0.1 wt% to 6.0 wt% of the preformed aqueous polymer dispersant. The aqueous polymer dispersant has a pH from 6.0 to 12.0 and includes from 5 wt% to 60 wt% of a polymeric component and from 40 wt% to 95 wt% of a fluid medium. The polymeric component includes at least one base polymer derived from 20 wt% to 100 wt% of at least one hydrophilic acid monomer having at least one carbonyl group, phosphate group, phosphonate group, or sulfonyl group, and optionally derived from at least one hydrophobic terminally unsaturated hydrocarbon monomer.
摘要:
An acrylic polyurethane coating composition, comprising an isocyanate component comprising at least one polyisocyanate trimer; and an isocyanate reacting mixture, the isocyanate reacting mixture comprising from 25 wt % to 80 wt % of an acrylic polyol and from 1 wt % to 30 wt % of a polyether polyol, based on a total weight of the acrylic polyurethane coating composition, the acrylic polyol having a solids content of at least 50 wt %, based on a total weight of the acrylic polyol, and the polyether polyol having a viscosity of less than 500 mPa*s at 25° C. and a number average molecular weight greater than 300 and less than 700.
摘要:
A coated proppant includes a solid core proppant particle and a heavy metal recovery coating, including heavy metal recovery crystals embedded within a polymer resin matrix. A process for the manufacture of a coated proppant includes providing a solid core proppant particle, and forming on the solid core proppant particle, a heavy metal recovery coating including heavy metal recovery crystals embedded within a polymer resin matrix.
摘要:
The present disclosure describes a treated cellulosic material comprising a cellulosic material having a porous structure defining a plurality of pores, at least a portion of the pores containing a treating agent comprising a reaction product of an epoxy resin, an acrylic latex and a carboxylated curing agent and/or amine curing agent. The present disclosure further describes a method for preparing a treated cellulosic material comprising providing a cellulosic material; and a first treatment protocol comprising impregnating the cellulosic material with an aqueous dispersion, the aqueous dispersion comprising an epoxy resin and an acrylic latex.
摘要:
A one-package moisture curable composition is provided. The composition comprises, by weight percentage based on the dry weight of the composition, from 10 to 99% at least one silane terminated polyurethane and from 1 to 90% at least one silane terminated polysiloxane! wherein the silane terminated polyurethane based polymer has at least one end group of the general formula^ - A-(CH2)m-SiR1 n (OR2)3-n, wherein A is a urethane or urea linkage group, R1 is selected from C1-12 alkyl, alkenyl, alkoxy, aminoalkyl, aryl and (meth)acryloxyalkyl groups, R2 is each substituted or unsubstituted C1-18 alkyl or C6-C20 aryl groups, m is an integer from 1 to 60, and n is an integer from 0 to V, and wherein the silane terminated polysiloxane can be the polysiloxane based polymer with hydrolysable silane group or the reaction products of at least one organofunctional polysiloxane and at least one organofunctional silane; and wherein the composition, after moisture cured, forms a surface whose water contact angle is larger than 101°. The composition is suitable for the applications in coatings which afford low surface energy surface and improved mechanical performance, such as marine antifouling coating, anti-icing coating, anti-stain coating, self-cleaning coating, and non-sticky coating, etc.
摘要:
A non-pigment particle that includes a non-pigment inorganic particle having an average particle diameter of from 0.005 to 5 microns and an index of refraction of less than 1.8, a water-soluble sulfur acid-functional first polymer and a second polymer that at least partially encapsulates the non-pigment inorganic particle.