The invention relates to a crosslinking two-component polyurethane composition consisting of (i) a constituent A containing polyols and additives, and (ii) a constituent B containing between 100 and 65 wt. % of aromatic polyisocyanates, between 0 and 35 wt. % of aliphatic polyisocyanates, and between 0.05 and 3.0 wt. % of a retarder, and optionally additives, the mixed composition having a viscosity (EN ISO 2555) of between 100 mPas and 3000 mPas at 25 C., and the crosslinked composition having a glass transition temperature (Tg) of higher than 50 C. and a pot life of longer than 60 minutes. The two-component polyurethane composition is suitable as an adhesive and as a matrix substance for composite materials.

The invention relates to a crosslinking two-component polyurethane composition consisting of (i) a constituent A containing polyols and additives, and (ii) a constituent B containing between 100 and 65 wt. % of aromatic polyisocyanates, between 0 and 35 wt. % of aliphatic polyisocyanates, and between 0.05 and 3.0 wt. % of a retarder, and optionally additives, the mixed composition having a viscosity (EN ISO 2555) of between 100 mPas and 3000 mPas at 25 C., and the crosslinked composition having a glass transition temperature (Tg) of higher than 50 C. and a pot life of longer than 60 minutes. The two-component polyurethane composition is suitable as an adhesive and as a matrix substance for composite materials.

An integrated self-sealing joint sealing system that is incorporated into the factory edges of a sheathing panel prior to installation at a job site, eliminating the need to secondarily apply tapes or similar fluid-applied sealants, as the joints will become sealed when mated and installed next to adjacent sheathing panels. The system works with a variety of joint types, including, but not limited to, bead-and-cove joints, cove-and-cove, and cove-and-butt joints, with matching corresponding joint profiles along panel edges. A compressible sealant, adhesive or gasket material is applied to surfaces in one or both profiles at the factory during the manufacturing process. During field installation, the matching corresponding joint profiles are placed together so the sealant material is compressed, forming a complete watertight and airtight joint.

An integrated self-sealing joint sealing system that is incorporated into the factory edges of a sheathing panel prior to installation at a job site, eliminating the need to secondarily apply tapes or similar fluid-applied sealants, as the joints will become sealed when mated and installed next to adjacent sheathing panels. The system works with a variety of joint types, including, but not limited to, bead-and-cove joints, cove-and-cove, and cove-and-butt joints, with matching corresponding joint profiles along panel edges. A compressible sealant, adhesive or gasket material is applied to surfaces in one or both profiles at the factory during the manufacturing process. During field installation, the matching corresponding joint profiles are placed together so the sealant material is compressed, forming a complete watertight and airtight joint.

It is provided a process to modify lignocellulosic materials with lignin, and incorporating lignin and isocyanates or other wood adhesive in wood products compositions, and their composition, preparation and application for bonding wood products are disclosed. The compositions comprise lignin, derived from a variety of natural resources, isocyanate compounds containing two or more isocyanate functional groups, or other wood adhesives.

It is provided a process to modify lignocellulosic materials with lignin, and incorporating lignin and isocyanates or other wood adhesive in wood products compositions, and their composition, preparation and application for bonding wood products are disclosed. The compositions comprise lignin, derived from a variety of natural resources, isocyanate compounds containing two or more isocyanate functional groups, or other wood adhesives.

A corn straw ecological board and a preparation method thereof are provided. The preparation method includes: (1) mixing a corn straw powder and a sizing material to obtain a mixed material, and then dividing the mixed material into a surface wet material and a core wet material; (2) drying the surface wet material and the core wet material obtained in step (1) respectively to obtain a surface material and a core material, wherein the surface material has a moisture content of 25% to 30%, and the core material has a moisture content of 10% to 15%; and (3) laying the core material and the surface material obtained in step (2) in a surface-core-surface manner, and then subjecting a resulting system to pre-pressing and hot-pressing in sequence to obtain the corn straw ecological board.

A corn straw ecological board and a preparation method thereof are provided. The preparation method includes: (1) mixing a corn straw powder and a sizing material to obtain a mixed material, and then dividing the mixed material into a surface wet material and a core wet material; (2) drying the surface wet material and the core wet material obtained in step (1) respectively to obtain a surface material and a core material, wherein the surface material has a moisture content of 25% to 30%, and the core material has a moisture content of 10% to 15%; and (3) laying the core material and the surface material obtained in step (2) in a surface-core-surface manner, and then subjecting a resulting system to pre-pressing and hot-pressing in sequence to obtain the corn straw ecological board.

An engineered wood based siding, cladding or panel with a microstrand interface layer (MIL) applied to the top of the main strand matrix layers to minimize telegraphing, add rigidity and strength, and provide an improved surface appearance. The MIL comprises microstrands applied to the surface of the strand matrix or mat during production, prior to deposition of a fines layer. The MIL prevents the loss of fines into the strand matrix, and helps prevent or eliminate strand telegraphing.

An improved oriented strand board (OSB) panel or board with higher resin loading and control of the density to provide improved and/or enhanced properties, and methods of manufacturing such an improved OSB panel or board. In several exemplary embodiments, as described in greater detail below, resin loading of the strands used for OSB formation is increased in conjunction with the density of the manufactured OSB board being controlled to a certain density or within certain density ranges for use with decorative panels, exterior cladding or siding panels, engineered wood flooring, and/or exterior structural wall or roofing panels. Both increased resin-loading and controlled density increases are required for overall core performance increases, and the surprisingly enhanced performance characteristics outweigh the increased cost of production.