摘要:
Foamed thin materials such as foamed film and foamed fibrillated materials produced by extruding a composition consisting of 100 parts by weight of aliphatic polyester having a melt viscosity of 1.0.times.10.sup.3 -1.0.times.10.sup.5 poises at a temperature of 190.degree. C. and a shear rate of 100 sec.sup.-1, and having a melting point of 70.degree.-200.degree. C., and 0.2-5 parts by weight of foaming agent. These foamed thin materials has biodegradability, excellent mechanical, insulating, touch and aesthetic properties. They are useful materials as insulating, packaging, oil absorbing materials and filters.
摘要:
Foamed thin materials such as foamed film and foamed fibrillated materials produced by extruding a composition consisting of 100 parts by weight of aliphatic polyester having a melt viscosity of 1.0.times.10.sup.3 -1.0.times.10.sup.5 poises at a temperature of 190.degree. C. and a shear rate of 100 sec.sup.-1, and having a melting point of 70.degree.-200.degree. C., and 0.2-5 parts by weight of foaming agent. These foamed thin materials has biodegradability, excellent mechanical, insulating, touch and aesthetic properties. They are useful materials as insulating, packaging, oil absorbing materials and filters.
摘要:
A method for producing polyester foamed articles comprising: heating and foaming a resin composition comprising a foaming agent, and an aliphatic polyester having a melt viscosity of 1.0.times.10.sup.3 -1.0.times.10.sup.6 poises at a temperature of 190.degree. C. and a shear rate of 100 sec.sup.-1, and having a melting point of 70.degree.-190.degree. C. Extrusion or forming in a mold using preexpanded beads can be applied. The foamed articles such as insulating boxes and cushioning materials have biodegradability and excellent mechanical properties such as tensile strength and cushioning properties.
摘要:
A method for producing a high molecular weight saturated polyester comprising adding to a saturated polyester with the terminal group being substantially hydroxyl group, having a number average molecular weight of 5,000 or more and being in the molten state, diisocyanate containing isocyanate group the amount of which corresponds to 1/10 to 2 equivalents of the amount of the hydroxyl group.
摘要:
A photocurable resin composition comprising:(A) a curable polymer or oligomer having one or more (metha)acryloyl groups in its molecule;(B) a white pigment;(C) a radical-generating compound having a decomposition temperature of 60.degree. C. or lower at a half-life of 10 hours; and(D) a photo-initiator, as occasion demands, and a method of producing a decorative material using this resin composition.
摘要:
A curable copolymer is provided wherein an unsaturated epoxy resin is prepared by reacting epoxy resin and acrylic and/or methacrylic acid, said unsaturated epoxy resin containing both a epoxy group and acryloyl and/or methacryloyl groups, with which a vinyl monomer is reacted in the presence of a radical catalyst to form an epoxy resin side chain. The resultant resin is finally reacted with acrylic and/or methacrylic acid to react with the remaining epoxy resin thereby resulting in terminal acryloyl and/or methacryloyl groups. This resin can be used as coating paint or molding resin or for a variety of other uses.
摘要:
A process for producing a curable resin having unsaturated groups in the side chains through urethane linkages, which comprises reacting (A) a polymer having hydroxyl groups in the side chains with (B) an unsaturated monoisocyanate obtained by reacting 1 mole of a diisocyanate with more than 1 but less than 1.8 moles of an unsaturated monoalcohol.
摘要:
This invention relates to a curable resinous composition which comprises (I) 100 parts by weight of unsaturated alkyd obtained by the condensation reaction of an .alpha., .beta.-unsaturated polycarboxylic acid or its anhydride with polyhydric alcohol or alkylene oxide and (II) 1 - 200 parts by weight of an unsaturated cycloacetal obtained by the condensation reaction of an unsaturated aldehyde with a polyhydric alcohol.
摘要:
This invention relates to a curable resinous composition prepared by reacting 1 mol of (a) an unsaturated polycycloacetal, 0.1 to 3 mols of (b) an ester of polyhydric alcohol/unsaturated monocarboxylic acid, having an alcoholic hydroxyl group and a polymerizable unsaturated bond selected from the group of acryl and methacryl groups in the same molecule, and 0.1 to 2.9 mols (per hydroxyl group in component b) of (c) a polyhydroxy compound.