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AssigneeKuraray Co., Ltd.
InventorsYoshiaki Asanuma, Koichiro Isoue
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Disclosed is a porous powder of a crosslinkable polyvinyl acetal which is capable of forming a cured product having excellent solvent resistance by light irradiation, electron beam irradiation or heat treatment, while being excellent in cleanability and solubility in solvents. Specifically disclosed is a crosslinkable polyvinyl acetal porous powder which contains a crosslinkable polyvinyl acetal containing a monomer unit to which a crosslinkable functional group is bonded through at least one bond selected from an ester bond, an ether bond and a urethane bond, wherein the crosslinkable functional group content is 0.3-20% by mole relative to the total of —CH2—CH— units in the main chain of vinyl acetal. The crosslinkable polyvinyl acetal porous powder has an average particle diameter of 30-10,000 μm and a bulk density of 0.12-0.50 g/mL.
A crosslinkable polyvinyl acetal porous powder, comprising crosslinkable polyvinyl acetal containing a monomer unit having a crosslinkable functional group bonded thereto through at least one bond selected from the group consisting of an ester bond, an ether bond and an urethane bond, and having a content of the crosslinkable functional group of 0.3 to 20 mol % with respect to the total of —CH2—CH— units in the main chain of polyvinyl acetal, wherein
A method for producing a crosslinkable polyvinyl acetal porous powder, comprising the step of reacting a polyvinyl acetal porous powder that may have a carboxyl group and/or a carboxylate group with a compound having a crosslinkable functional group, wherein
Dependencies are inferred from the claim text.