The present invention relates to a process for the manufacture of foamed polymeric material characterised by the presence of two or more cellular layers and aggregates that exhibit variations in cell size and cell density distribution. The heterogeneous polymeric material is foamed using a single expansion step, thus eliminating the assembly steps and improving the mechanical proprieties of the foam. The invention allows producing custom foam with predefined profiles of cell size, cell density distribution, and with correlated variations of its physical properties. The key to this invention is that the polymer material before expansion is made in multiple polymerisation steps from the original monomers. In each polymerisation step, a different recipe of monomers and physical blowing agents' concentration is used. These recipes within the final polymer material will expand under the same temperature to produce various aggregates of cell sizes and cell distribution in the final foam.

The present invention relates to a process for the manufacture of foamed polymeric material characterised by the presence of two or more cellular layers and aggregates that exhibit variations in cell size and cell density distribution. The heterogeneous polymeric material is foamed using a single expansion step, thus eliminating the assembly steps and improving the mechanical proprieties of the foam. The invention allows producing custom foam with predefined profiles of cell size, cell density distribution, and with correlated variations of its physical properties. The key to this invention is that the polymer material before expansion is made in multiple polymerisation steps from the original monomers. In each polymerisation step, a different recipe of monomers and physical blowing agents' concentration is used. These recipes within the final polymer material will expand under the same temperature to produce various aggregates of cell sizes and cell distribution in the final foam.

The present invention provides a cushion partially or entirely composed of a foam, the foam composed of a polymer composition that includes a homopolymer or a copolymer including a constituent unit derived from farnesene.

A reinforcing sheet including one or more layers of a reinforcing material, and a thermosetting adhesive associated with the reinforcing material, wherein the thermosetting adhesive includes a curing agent, and an epoxy-modified dimerized fatty acid combined with an epoxy terminated polyurethane interpenetrating network.

A porous liquid crystal polymer sheet that includes: a resin sheet having pores and containing a first component composed of a liquid crystal polymer and a second component accounting for a highest weight percentage of the resin sheet except for the first component, wherein, when a region containing the second component is defined as a first region, and a region having a smaller content of the second component than the first region is defined as a second region in the porous liquid crystal polymer sheet, the first region has higher compressive strength than the second region, the second component has an average particle size smaller than an average pore size of the pores, and the second component is not in contact with an inside of the pores.

A porous liquid crystal polymer sheet that includes a resin sheet containing a liquid crystal polymer and having pores. The porous liquid crystal polymer sheet has a melt viscosity of 20 Pa.Math.s or more under the conditions of a shear rate of 1000 s.sup.−1 and a measurement temperature that is 20° C. higher than a melting point of the resin sheet.

Disclosed are a polyurethane foam composition for sound-absorbing materials, a method for manufacturing a polyurethane foam and a polyurethane foam manufactured using the method. Particularly, disclosed are a composition containing a polyol mixture including a polyol and an additive, and isocyanate, and the manufacture of a low-density polyurethane foam for sound-absorbing materials, which is imparted with improved appearance formability, reduced smell and enhanced sound absorption performance by controlling the content of the composition and the conditions for foaming the composition.

Disclosed herein are kits for use in adding degradable foam to a tire, methods for preparing a degradable foam-containing tire, tires containing degradable foam, and methods for degrading the degradable foam in tires containing degradable foam. The degradable foam comprises a combination of (i) at least one di- or polyisocyanate, (ii) at least one polysiloxane diol, at least one polysiloxane diamine, or a combination thereof, and (iii) optionally at least one polyol.

Disclosed herein are kits for use in adding degradable foam to a tire, methods for preparing a degradable foam-containing tire, tires containing degradable foam, and methods for degrading the degradable foam in tires containing degradable foam. The degradable foam comprises a combination of (i) at least one di- or polyisocyanate, (ii) at least one polysiloxane diol, at least one polysiloxane diamine, or a combination thereof, and (iii) optionally at least one polyol.

Compositions and methods are presented in which aragonite, and especially oolitic aragonite particles are used as infill material in an artificial turf structure or as sub-growth substrate for natural grass. Advantageously, oolitic aragonite particles provide: a superior microporous surface for effective water saturation to impart thermal control and environmental compatibility; ammonia neutralization of urine by reducing urea hydrolysis with the free calcium presented in the aragonite particles; and aragonite particle uniformity allowing for reduced compaction and desirable water draining.