The disclosure relates to a thermoset omniphobic composition, which includes a thermoset polymer with first, second, and third backbone segments, urethane groups linking the first and third backbone segments, and urea groups linking the first and second backbone segments. The first, second, and third backbone segments generally correspond to urethane or urea reaction products of polyisocyanate(s), amine-functional hydrophobic polymer(s), and polyol(s), respectively. The thermoset omniphobic composition has favorable omniphobic properties, for example as characterized by water and/or oil contact and/or sliding angles. The thermoset omniphobic composition can be used as a coating on any of a variety of substrates to provide omniphobic properties to a surface of the substrate. Such omniphobic coatings can be scratch resistant, ink/paint resistant, dirt-repellent, and optically clear. The thermoset omniphobic composition can be applied by different coating methods including cast, spin, roll, spray and dip coating methods.

Polyester polyols for use in low-VOC polyurethane compositions are disclosed. The polyester polyols are the reaction product of at least one aliphatic polycarboxylic acid, at least one alkoxylated polyalcohol having a functionality of 2.0 or greater, and one or more polyalcohols other than an alkoxylated polyalcohol. The polyester polyols can be formulated into polyurethane compositions to obtain a polyurethane having a low VOC content. The polyurethane composition is particularly suitable for polyurethane coating applications.

Nanoporous three-dimensional networks of polyurethane particles, e.g., polyurethane aerogels, and methods of preparation are presented herein. Such nanoporous networks may include polyurethane particles made up of linked polyisocyanate and polyol monomers. In some cases, greater than about 95% of the linkages between the polyisocyanate monomers and the polyol monomers are urethane linkages. To prepare such networks, a mixture including polyisocyanate monomers (e.g., diisocyanates, triisocyanates), polyol monomers (diols, triols), and a solvent is provided. The polyisocyanate and polyol monomers may be aliphatic or aromatic. A polyurethane catalyst is added to the mixture causing formation of linkages between the polyisocyanate monomers and the polyol monomers. Phase separation of particles from the reaction medium can be controlled to enable formation of polyurethane networks with desirable nanomorphologies, specific surface area, and mechanical properties. Various properties of such networks of polyurethane particles (e.g., strength, stiffness, flexibility, thermal conductivity) may be tailored depending on which monomers are provided in the reaction.

A two-component curable solventless-type laminate adhesive contains a polyisocyanate component and a polyol component. The polyisocyanate component contains a derivative of a pentamethylene diisocyanate, the derivative of the pentamethylene diisocyanate contains an isocyanurate group and an allophanate group, and the content ratio of the isocyanurate group with respect to 100 moles of the total amount of the isocyanurate group and the allophanate group is 60 moles or more and 99 moles or less.

A urethane group-containing reactive polyisocyanate composition is disclosed which contains not more than 1 wt % of monomeric starting di-isocyanate based on the total weight of said polyisocyanate composition, having an NCO value in the range 0.1-15%, and wherein said composition comprises urethane groups and allophanate groups and wherein the ratio of allophanate groups over urethane groups is between 0.05 and 100.

A process of: providing a polyfunctional compound selected from polyisocyanate, polyacrylate, and polyepoxy; and reacting the polyfunctional compound with a hydroxyl- or amine-terminated silyl-containing compound. The polyfunctional compound and the silyl-containing compound are at least difunctional. A thermoset made by this process.

The present invention provides methods for producing polyurethane foam compositions. Such methods include mixing an A-side composition, a B-side composition, and CO.sub.2 to provide a foam mixture, wherein at least a portion of the CO.sub.2 is added as a separate stream, or is provided dissolved in the B-side composition.

1) Two-component polyurethane-based adhesive composition comprising an NCO component and an OH component, such that: the NCO component is obtained by polyaddition between MDI and a composition of polyols comprising a polyether diol and a polyether triol, in an NCO/OH molar equivalent ratio of between 2.5 and 6.5; the OH component is obtained by polyaddition between MDI and a composition of polyols with a functionality of 2 comprising an aliphatic polyester diol, a partially aromatic polyester diol and an aliphatic polyether diol, in an NCO/OH molar equivalent ratio of between 0.05 0.50; the amounts of the NCO and OH components being such that the NCO/OH molar equivalent ratio is within a range extending from 1.5 to 1.7.

2) Multilayer film comprising 2 thin layers of material linked to one another by a continuous layer constituted by said crosslinked adhesive composition.

3) Process for preparing said film and use thereof in the manufacture of flexible packagings.

A composite film comprises: a first unitary thermoplastic polymer film; a low surface energy abrasion resistant layer disposed on the first unitary thermoplastic polymer film; a first adhesive layer proximate and securely bonded to the first unitary thermoplastic polymer film; a second unitary thermoplastic polymer film bonded to the first adhesive layer; and a second adhesive layer bonded to the second unitary thermoplastic polymer film opposite the first adhesive layer. A protective cover for an electronic device comprises: a first unitary thermoplastic polymer film; a low surface energy abrasion resistant layer disposed on the first unitary thermoplastic polymer film; a first adhesive layer proximate and securely bonded to the first unitary thermoplastic polymer film. The low surface energy abrasion resistant layer comprises an at least partially cured curable composition comprising components, based on the total weight of components a) to d): a) 70 to 95 weight percent of urethane (meth)acrylate compound having an average (meth)acrylate functionality of 3 to 9; b) 2 to 20 weight percent (meth)acrylate monomer having a (meth)acrylate functionality of 1 to 2, wherein the (meth)acrylate monomer is not a urethane (meth)acrylate compound; c) 0.5 to 2 weight percent of silicone (meth)acrylate; and d) optional effective amount of photoinitiator. Methods of making are also disclosed.

An object of the present invention is to provide a two-part urethane-based adhesive composition that exhibits excellent adhesion to a base material without using a primer. A two-part urethane-based adhesive composition according to the present invention contains: a main agent that contains a urethane prepolymer having an isocyanate group; and a curing agent that contains a compound having two or more active hydrogen-containing groups in each molecule. One or both of the main agent and the curing agent contain a (meth)acrylamide compound.