Disclosed is a hydrophilic polyolefin sintered material which is a water-absorbing sintered material of a polyolefin resin ice having a graft chain composed of at least one molecular chain selected from hydrophilic ethylenically unsaturated group-containing monomers and their polymers. This hydrophi
Disclosed is a hydrophilic polyolefin sintered material which is a water-absorbing sintered material of a polyolefin resin ice having a graft chain composed of at least one molecular chain selected from hydrophilic ethylenically unsaturated group-containing monomers and their polymers. This hydrophilic polyolefin sintered material has an average porosity of 20-80% by volume and an open cell having an average pore diameter of 1-150 μm.
대표청구항▼
1. A hydrophilic polyolefin sintered material which is a water-absorbing sintered material of polyolefin resin particles having a graft chain comprising at least one molecular chain selected from hydrophilic ethylenically unsaturated group-containing monomers and polymers thereof,wherein the hydroph
1. A hydrophilic polyolefin sintered material which is a water-absorbing sintered material of polyolefin resin particles having a graft chain comprising at least one molecular chain selected from hydrophilic ethylenically unsaturated group-containing monomers and polymers thereof,wherein the hydrophilic polyolefin sintered material has an average porosity of 20% to 80% by volume and a continuous pore having an average pore diameter of 1 to 150 μm, andwherein the hydrophilic polyolefin sintered material after being immersed for 7 hours in 60° C. hot water has a drop absorption time of 30 seconds or less and a water suction height of 5 mm or more per minute. 2. The hydrophilic polyolefin sintered material according to claim 1, wherein the hydrophilic ethylenically unsaturated group-containing monomers have at least one functional group selected from a phosphorylcholine group, a hydroxyl group, a carboxyl group, an amino group, an amide group, an alkoxy group, a sulfo group or salts thereof. 3. The hydrophilic polyolefin sintered material according to claim 1, wherein the hydrophilic ethylenically unsaturated group-containing monomers comprise at least one monomer selected from methacryloyloxyalkyl phosphorylcholines and acryloyloxyalkyl phosphorylcholines represented by the following general formula (I): wherein, R1 is a hydrogen atom or a methyl group, and n is an integer number of 2 to 10. 4. The hydrophilic polyolefin sintered material according to claim 1, wherein the hydrophilic ethylenically unsaturated group-containing monomers comprise at least one monomer selected from 2-methacryloyloxyethyl phosphorylcholine, 2-hydroxypropyl acrylate, 2-hydroxyethyl methacrylate, 2-diethylaminoethyl methacrylate and vinyl sulfonic acid. 5. The hydrophilic polyolefin sintered material according to claim 1, wherein the hydrophilic ethylenically unsaturated group-containing monomers have a graft ratio of 0.01% to 50%. 6. The hydrophilic polyolefin sintered material according to claim 1, wherein the polyolefin is a homopolymer of ethylene or a copolymer of ethylene and an olefin having 3 or more carbon atoms. 7. The hydrophilic polyolefin sintered material according to claim 1, wherein the polyolefin resin particles comprising the hydrophilic polyolefin sintered material have an average particle diameter of 10 to 350 μm, a particle diameter of 90% by weight or more of the particles in the range of 1 to 500 μm, a bulk density of 0.20 to 0.55 g/cm3, a density of 0.850 to 0.970 g/cm3, and a viscosity-average molecular weight of 50,000 to 7,000,000. 8. The hydrophilic polyolefin sintered material according to claim 1, having a ratio of maximum value Y to minimum value X of the water suction height, i.e., Y/X, in the range of 1.0 to 2.0 times per minute. 9. The hydrophilic polyolefin sintered material according to claim 1, wherein the hydrophilic polyolefin sintered material after removing a 60° C. hot water-soluble component has a ratio of maximum value Y to minimum value X of the water suction height, i.e., Y/X, in the range of 1.0 to 2.0 times per minute. 10. A method of producing the hydrophilic polyolefin sintered material according to claim 1, comprising the step of grafting at least one molecular chain selected from the hydrophilic ethylenically unsaturated group-containing monomers and polymers thereof onto polyolefin resin particles or a sintered material thereof in a liquid phase. 11. The method of producing the hydrophilic polyolefin sintered material according to claim 10, comprising the step of grafting at least one molecular chain selected from the hydrophilic ethylenically unsaturated group-containing monomers and polymers thereof onto polyolefin resin particles or a sintered material thereof in a liquid phase from which dissolved oxygen is removed. 12. The method of producing the hydrophilic polyolefin sintered material according to claim 10, wherein the polyolefin resin particles are packed into a mold and thereby sinter-molded. 13. The method of producing the hydrophilic polyolefin sintered material according to claim 10, wherein the polyolefin resin particles are deposited and thereby sinter-molded. 14. The method of producing the hydrophilic polyolefin sintered material according to claim 10, wherein the polyolefin resin particles is sinter-molded and thereafter at least one molecular chain selected from the hydrophilic ethylenically unsaturated group-containing monomers and polymers thereof is grafted. 15. The method of producing the hydrophilic polyolefin sintered material according to claim 10, wherein at least one molecular chain selected from the hydrophilic ethylenically unsaturated group-containing monomers and polymers thereof is previously grafted onto the polyolefin resin particles and thereafter the particles are sinter-molded. 16. The method of producing the hydrophilic polyolefin sintered material according to claim 10, wherein grafting is carried out by exposure to ionizing radiation. 17. The method of producing the hydrophilic polyolefin sintered material according to claim 16, wherein the ionizing radiation is γ-ray. 18. The method of producing the hydrophilic polyolefin sintered material according to claim 16, wherein the exposure dose of the ionizing radiation is in the range of 1 kGy to 1,000 kGy. 19. The method of producing the hydrophilic polyolefin sintered material according to claim 16, wherein the hydrophilic polyolefin sintered material is obtained by previously exposing polyolefin resin particles or a sintered material thereof to ionizing radiation and thereafter contacting the particles or sintered material with hydrophilic ethylenically unsaturated group-containing monomers. 20. The method of producing the hydrophilic polyolefin sintered material according to claim 10, wherein grafting is carried out by exposure to an active light.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허를 인용한 특허 (4)
Coutu, Ken; Hemingson, Howard Brian; Gerber, Manfred, Energy exchange system for conditioning air in an enclosed structure.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.