A polyurethane, in particular a thermoplastic polyurethane, is obtainable or obtained by reacting at least a polyisocyanate composition and a polyol composition. The polyol composition contains at least one polyester diol or polyether diol, having a number-average molecular weight in the range from 500 to 3000 g/mol, and at least one polysiloxane having two terminal isocyanate-reactive functionalities selected from a thio group, a hydroxyl group, and an amino group. A process can be used for preparing this polyurethane, and a molded body containing the polyurethane is useful. Foam beads based on polyurethane can be obtained or obtainable from the polyurethane, and a process can be used for producing foam beads. Corresponding bead foams are useful.

A purpose of the present invention is to provide a urethane composition which does not require use of a lead-based curing catalyst, exhibits excellent curability and workability, and can be advantageously used in a variety of applications, such as adhesives, coating materials, sealing materials, waterproofing materials, floor materials, wall materials and paints.

The present invention provides a urethane composition which contains an active hydrogen-containing organic compound (A), a polyisocyanate (B), a curing catalyst (C), and an aromatic compound (D). The active hydrogen-containing organic compound (A) contains a polyol. The aromatic compound (D) has a structure represented by Chemical Formula (1).

Silicone polyurea block copolymers are prepared by copolymerizing: (a) a diamine composition that includes a polyethylene glycol diamine, and optionally, a dipiperidyl alkane; (b) a monofunctional silicone isocyanate; and (c) a diisocyanate. Compositions useful as passivating coatings comprising the block copolymer are also provided, and substrates coated with the compositions. Methods of preparing and using the compositions are also described.

The present invention relates to [1] a polymerizable composition for optical member containing a polymerizable component and a urethaneurea compound having a structural unit derived from tolylene diisocyanate in an amount of 0.1 to 10 parts by mass based on 100 parts by mass of a total amount of the polymerizable component; [2] a production method of an optical member, including a step of injecting the polymerizable composition of [1] into a molding die, and a step of polymerizing the polymerizable composition; and [3] a spectacle lens including a spectacle lens substrate obtained by the production method of [2].

The present application discloses a polyol system for preparing polyurethane comprising: i) at least one active chain extender having at least two groups that can react with an isocyanate, wherein at least one group that can react with an isocyanate is free primary —NH2 group; ii) at least one active chain extender having three groups that can react with an isocyanate, wherein at least one group that can react with an isocyanate is free primary —OH group, and iii) at least one polyether polyol starting from an amine. The polyol system according to the present disclosure is phase-stable without layering and capable of releasing mold quickly after reacting with an isocyanate to produce polyurethane.

The invention relates to a rubber composition for a mechanical member with a dynamic function, to a process for preparing this composition, to such a member and to a use of a polymer bearing urethane functions.

The composition is based on at least one elastomer and comprises a reinforcing filler and said polymer dispersed in the elastomer, the composition comprising the product of an in situ thermomechanical blending reaction of the elastomer with the filler, precursors of the polymer and a chain extender.

According to the invention, the composition has a ratio G′ 0.5%/G′ 20% of storage moduli G′ relative to the complex shear moduli G* satisfying at least one of the following conditions (i) to (v), G′ 0.5% and G′ 20% being measured according to the standard ISO 4664 at respective dynamic strain amplitudes of 0.5% and 20%, on double shear test specimens subjected to shear strains of from 0.02% to 50% at the same frequency of 5 Hz and at the same temperature T:

G′ 0.5%/G′ 20% ≤1.15 for T=100° C.,   (i)

G′ 0.5%/G′ 20% ≤1.40 for T=65° C.,   (ii)

G′ 0.5%/G′ 20% ≤1.50 for T=25° C.,   (iii)

G′ 0.5%/G′ 20% ≤1.60 for T=0° C.,   (iv)

G′ 0.5%/G′ 20% ≤2.50 for T=−30° C.   (v)

A polyurea composition including a first component A with at least one isocyanate-functional polyurethane polymer P1 and a second component B including a blocked amine BA and optionally a polyamine PA having a molecular weight in the range from 60 to 500 g/mol. The polyurea composition further includes a silane S1 selected from the list consisting of isocyanatosilanes S1-1 and epoxy silanes S1-2 as well as an aminosilane S2 and an aggregate AG of an at 23° C. solid thermoset. The polyurea composition is notable for high surface roughness and for reliable and long-term bonding of the aggregates to the coating with no need for sealing. Further, the polyurea composition has enough adhesion to the substrate that the application of a primer layer on the substrate prior to application is not necessary.

A polyurea composition including a first component A with at least one isocyanate-functional polyurethane polymer P1 and a second component B including a blocked amine BA and optionally a polyamine PA having a molecular weight in the range from 60 to 500 g/mol. The polyurea composition further includes a silane S1 selected from the list consisting of isocyanatosilanes S1-1 and epoxy silanes S1-2 as well as an aminosilane S2 and an aggregate AG of an at 23° C. solid thermoset. The polyurea composition is notable for high surface roughness and for reliable and long-term bonding of the aggregates to the coating with no need for sealing. Further, the polyurea composition has enough adhesion to the substrate that the application of a primer layer on the substrate prior to application is not necessary.

A polyurea composition including a first component A with at least one isocyanate-functional polyurethane polymer P1 and a second component B including a blocked amine BA and optionally a polyamine PA having a molecular weight in the range from 60 to 500 g/mol. The polyurea composition further includes a silane S1 selected from the list consisting of isocyanatosilanes S1-1 and epoxy silanes S1-2 as well as an aminosilane S2 and an aggregate AG of an at 23° C. solid thermoset. The polyurea composition is notable for high surface roughness and for reliable and long-term bonding of the aggregates to the coating with no need for sealing. Further, the polyurea composition has enough adhesion to the substrate that the application of a primer layer on the substrate prior to application is not necessary.

A polyurea composition including a first component A with at least one isocyanate-functional polyurethane polymer P1 and a second component B including a blocked amine BA and optionally a polyamine PA having a molecular weight in the range from 60 to 500 g/mol. The polyurea composition further includes a silane S1 selected from the list consisting of isocyanatosilanes S1-1 and epoxy silanes S1-2 as well as an aminosilane S2 and an aggregate AG of an at 23° C. solid thermoset. The polyurea composition is notable for high surface roughness and for reliable and long-term bonding of the aggregates to the coating with no need for sealing. Further, the polyurea composition has enough adhesion to the substrate that the application of a primer layer on the substrate prior to application is not necessary.