Polyether polyols are prepared by polymerizing unsaturated monomers in a continuous phase of a base polyol. A macromer or polymerization produce of such a macromer is present during the polymerization to stabilize the polymer particles as they form. The macromer is a polyether capped with certain unsaturated epoxide compounds.

The invention relates to a two-component composition comprising:

a part A comprising a complex of borane BH.sub.3 with an amine;

a part B comprising a decomplexing agent for decomplexing the borane and the amine; and

at least one radically polymerizable compound comprising at least one ethylenic bond, this compound being present in at least one of parts A and B; and also to the use of this composition as an adhesive for binding two substrates together.

Provided according to some embodiments is a polymerizable liquid useful for the production of a three-dimensional object comprised of polyurethane, polyurea, or a copolymer thereof by additive manufacturing, the polymerizable liquid comprising a mixture of: (a) a first blocked or reactive blocked prepolymer comprising a compound of the formula X(A).sub.n, where X is a hydrocarbyl group, n is at least 3, and each A is an independently selected substituent of Formula I: (I) where R is a hydrocarbyl group, R′ is O or NH, and Z is a blocking group; (b) a polyol and/or polyamine chain extender; (c) optionally a reactive diluent; and (d) a photoinitiator. A method of use of the polymerizable liquid to make a three-dimensional object by additive manufacturing and prepolymer compounds useful for the same are also provided.

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This invention relates to a process for preparing viscoelastic polyurethane foam in which the isocyanate-reactive component comprises a specific polyol blend, and to viscoelastic polyurethane foam wherein the isocyanate-reactive comprises the specific polyol blend. The polyol blend may be an in situ formed polyol blend.

Provided are: a curable composition that has excellent flexibility and shows excellent adhesion to both a plastic substrate and a conductor layer; a coating film of the curable composition; and a printed circuit board comprising a pattern-cured coating film obtained from the coating film. The present invention relates to: a curable composition for a printed circuit board, which is characterized by comprising (A) a block copolymer, (B) a hydroxyl group-containing (meth)acrylate compound and (C) a photopolymerization initiator; a coating film obtained by photo-curing the curable composition; and a printed circuit board comprising a resist pattern formed from the coating film.

This invention relates to a process for preparing viscoelastic polyurethane foam in which the isocyanate-reactive component comprises a specific polyol blend, and to viscoelastic polyurethane foam wherein the isocyanate-reactive comprises the specific polyol blend. The polyol blend may be an in situ formed polyol blend.

Provided according to some embodiments is a polymerizable liquid useful for the production of a three-dimensional object comprised of polyurethane, polyurea, or a copolymer thereof by additive manufacturing, the polymerizable liquid comprising a mixture of: (a) a first blocked or reactive blocked prepolymer comprising a compound of the formula X(A).sub.n, where X is a hydrocarbyl group, n is at least 3, and each A is an independently selected substituent of Formula I: (I) where R is a hydrocarbyl group, R is O or NH, and Z is a blocking group; (b) a polyol and/or polyamine chain extender; (c) optionally a reactive diluent; and (d) a photoinitiator. A method of use of the polymerizable liquid to make a three-dimensional object by additive manufacturing and prepolymer compounds useful for the same are also provided.

Provided according to some embodiments is a polymerizable liquid useful for the production of a three-dimensional object comprised of polyurethane, polyurea, or a copolymer thereof by additive manufacturing, the polymerizable liquid comprising a mixture of: (a) a first blocked or reactive blocked prepolymer comprising a compound of the formula X(A).sub.n, where X is a hydrocarbyl group, n is at least 3, and each A is an independently selected substituent of Formula I:

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where R is a hydrocarbyl group, Ris O or NH, and Z is a blocking group; (b) a polyol and/or polyamine chain extender; (c) optionally a reactive diluent; and (d) a photoinitiator. A method of use of the polymerizable liquid to make a three-dimensional object by additive manufacturing and prepolymer compounds useful for the same are also provided.

Polymer polyols (PMPOs), processes for their production, and the use of such PMPOs, particularly in the production of flexible polyurethane foams. The PMPOs are produced using an ethylenically unsaturated composition that includes tertiary amino group-containing ethylenically unsaturated compound.

Polymer polyols (PMPOs), processes for their production, and the use of such PMPOs, particularly in the production of flexible polyurethane foams. The PMPOs are produced using an ethylenically unsaturated composition that includes an ethylenically unsaturated compound comprising a reaction product of: (i) an amino alkyl urea having a tertiary amino group and a primary amino group; and (ii) an ethylenically unsaturated compound comprising a primary amine-reactive group.