A two-component polyurethane composition including of a polyol component and a polyisocyanate component, wherein the polyol component includes at least one reaction product of castor oil with ketone resins A1, at least one aliphatic triol A2, preferably an aliphatic diol A3, a polybutadiene polyol A4 and at least one hydroxylated polyester polyol A5 based on tall oil. The polyurethane composition has high strength and only a minor dependence of mechanical properties, especially of strength, on temperature. Moreover, the composition is capable of curing without blistering under ambient conditions, even in the presence of substrates that typically promote foaming reactions owing to the presence of residual moisture, for example glass fiber weave.

Provided is a rubber member for downhole tools, of which a decrease rate of 50% strain compressive stress after immersion for 24 hours in 150 C. water relative to 50% strain compressive stress before immersion is not less than 5%, and preferably not less than 50%. The rubber member is suitable for a seal member, ball sealer, ball seat, and a protecting member. Also provided is a downhole tool comprising the rubber member, and a method for recovering a hydrocarbon resource using the downhole tool.

Coatings comprising an uncured branched polyester-urethane resin prepared by free radical polymerization of an unsaturated polyester prepolymer having a polyol segment, an unsaturated polycarboxylic acid and/or an anhydride and/or ester thereof, and a urethane segment, wherein the polymerization occurs primarily by reaction of the unsaturation are disclosed.

New shape memory polymer compositions, methods for synthesizing new shape memory polymers, and apparatus comprising an actuator and a shape memory polymer wherein the shape memory polymer comprises at least a portion of the actuator. A shape memory polymer comprising a polymer composition which physically forms a network structure wherein the polymer composition has shape-memory behavior and can be formed into a permanent primary shape, re-formed into a stable secondary shape, and controllably actuated to recover the permanent primary shape. Polymers have optimal aliphatic network structures due to minimization of dangling Chains by using monomers that are symmetrical and that have matching amine and hydroxyl groups providing polymers and polymer foams with clarity, tight (narrow temperature range) single transitions, and high shape recovery and recovery force that are especially useful for implanting in the human body.

A papermaking device may have excellent strength and suppressed unevenness in strength between its parts. Such a papermaking device may be used in papermaking machine and may include at least one resin layer comprising polyurethane resin. The polyurethane resin may be obtained by reacting a urethane prepolymer having an isocyanate group with a curing agent having an active hydrogen group. The urethane prepolymer may be obtained by reacting a polyisocyanate compound including 2,4-tolylene-diisocyanate and/or 2,6-tolylene-diisocyanate with a polyol compound including one or more polyether polycarbonate diol(s).

This invention relates to urethane acrylic hybrid polymer dispersion with robust dry/wet adhesion and the basecoats prepared therefrom for automotive applications. In this system, the polyurethane dispersion (PUD) prepolymer is based on a combination of polyols and aliphatic diisocyanates. The acrylic portion is based on (meth)acrylated monomers. A combination of this hybrid polymer dispersion and other resins having defined glass transition temperature (T.sub.g) values, organic and/or inorganic rheology modifiers, and different additives including pigment, dispersant, and defoamer are used to prepare waterborne basecoats having modified appearance and performance. The final coatings show excellent dry/wet adhesion to the primer for automotive applications.

This invention relates to a composition for a preparation of polyurethane dispersion, comprising bio-based polyol as shown in structure (I) and polyhydroxy fatty acid compound as shown in structure (II): wherein, R represents a polyhydric alcohol unit that is selected from aliphatic polyhydric alcohol, alicyclic polyhydric alcohol, cyclic polyhydric alcohol, aromatic polyhydric alcohol, or optionally, cyclic polyhydroxyl having heteroatom; R\ represents a hydrocarbon unit obtained from a molecular chain of unsaturated fatty acid having 14-24 carbon atoms and having from 1-6 pairs of vicinal diol group per one molecular chain of such unsaturated fatty acid; n represents an integer from 2 to 8 of an ester group obtained from a reaction of polyhydric alcohol and unsaturated fatty acid; wherein said composition is prepared from a process comprising the steps of: i. mixing fatty acid comprising unsaturated fatty acid and polyhydric alcohol at a ratio of 1 mole equivalent or more of carboxylic group from unsaturated fatty acid per a hydroxy group from polyhydric alcohol; ii. adding organic acid and peroxide compound into the mixture from step i.; iii. adding nucleophilic substance into the mixture from step ii. under acidic condition.

##STR00001##

Hydrophobic polyurethane polymers which may be useful in making synthetic leathers comprising at least two immediately consecutive repeating units according to Formula I:

(OC(O)N).sub.nA-NC(O)O-L(M)-(I)

wherein n is 1 or 2, A represents the residue of an organic di- or tri-isocyanate compound, L represents a hydrocarbon group that optionally contains one or more catenary or non-catenary hetero-atoms, and M represents an oligomer comprising 2-12 (meth)acrylate units. The polyurethane polymers may additionally comprise end group(s) according to the formula -LM wherein L represents a hydrocarbon group that may contain one or more catenary or non-catenary hetero-atoms. In some embodiments, M is according to Formula III:

##STR00001##

wherein Q is hydrogen or methyl, p is an integer between 2 and 12 inclusive, and Z is a hydrocarbon group which may optionally be substituted.

A thermosetting conductive adhesive that can exhibit high conductivity (low connection resistance) when cured at a high temperature in a short time. The present invention also provides a thermosetting conductive adhesive that has excellent adhesive strength when cured at a high temperature in a short time. The thermosetting conductive adhesive according to the present invention includes components (A) to (D): component (A): a urethane-modified polyfunctional (meth)acrylate oligomer that is either an aromatic urethane-modified (meth)acrylate oligomer having six (meth)acryl groups in the molecule or an aliphatic urethane-modified (meth)acrylate oligomer having two (meth)acryl groups in the molecule; component (B): a monofunctional (meth)acrylate monomer; component (C): an organic peroxide; and component (D): conductive particles, in which when the component (A) is an aliphatic urethane-modified (meth)acrylate oligomer having two (meth)acryl groups in the molecule, the component (B) is a monofunctional acrylate monomer.

Disclosed is a composition and process for making a water blown polyurethane foam having a good balance of flow and stability. Said foams are particularly suited for thin wall motor vehicle applications, such as instrument panels.