In recent years, extreme weather caused by climate change has occurred frequently in countries around the world, and the reduction of greenhouse gases, which is the cause of climate change, is an urgent issue. To resolve these issues, our company has formulated an EcoVision and is working to achieve its goal of net-zero CO2 emissions （carbon neutrality）by 2035 in the areas of manufacturing, mobility products, and energy use. On the other hand, various adhesives and pressure-sensitive adhesives used in automotive products generate CO2 due to power consumption associated with heating during the coating and curing processes. Since the newly developed adhesive is a UV-LED curing type, the curing time can be significantly shortened compared to conventional heat-curing materials, resulting in energy saving and CO2 reduction. In addition, a new adhesive mechanism has been devised for application in vehicles, especially in harsh environments such as engine rooms, where it is difficult to use existing adhesive materials due to insufficient adhesion durability. As a result, the durability has been dramatically improved, and it is now possible to apply it to automotive products.

Dispersant influences impact strength of polyolefin composites.　Impact fracture behavior of polymer matrix can be selected arbitrary with choice of elastomer fraction of PP/elastomer blends, choice of test temperature of PP/elastomer blends and choice of impact strength of HDPE.　In the case that the matrix polymer showed ductile fracture behavior in the impact test, incorporation of filler with a diameter of several handled nanometer significantly increased impact strength.　On the other hand, in the case that the matrix polymer showed brittle fracture behavior in the impact test, incorporation of filler with a diameter of several handled nanometer hardly improved the impact strength. However, incorporation of filler with a diameter of several micrometer decreased impact strength regardless of impact fracture behavior of matrix.

Maleic anhydride grafted polypropylene（PP-g-MA）was added as compatibilizers in Linear low-density polyethylene（LLDPE）/polyamide 6（PA6）blends. Size of PA6 particles in the LLDPE was minimized by the addition of PP-g-MA. The appropriate amount of PP-g-MA significantly improved fatigue lifetime. However, excess amount of PP-g-MA lowered fatigue lifetime.

Polysiloxanes, which are polymers composed of repeating siloxane bonds（-Si-O-Si-）as their main chains, exhibit distinct characteristics compared to carbon-based polymers. Polydimethylsiloxane（PDMS）and other polysiloxanes have seen widespread commercial use since their industrialization in the 1940s. Recently, there has been a growing interest in polysiloxanes made from silica sand due to their potential for carbon neutrality and sustainability. Efforts to functionalize polysiloxanes are ongoing worldwide, and a precise polymerization method has been developed. The introduction of ionic groups has revolutionized the concept of polysiloxanes and enabled the achievement of various functions. For example, molecular design that introduces ionic groups into all monomer units can convert flexible polysiloxanes into materials with elastic moduli comparable to those of petroleum-based resins. This is a new development for polysiloxanes, which has traditionally been used exclusively as materials for fluid products such as oils and shampoos. In addition, recent research has uncovered several unique properties of all-ionic polysiloxanes, such as self-assembly via ionic crosslinking, ordering of the self-assembled structure upon humidification, and exceptional adhesive properties. In this paper, we review the recent trends in ionic linear polysiloxanes.