摘要:
The present invention provides an aqueous dispersion of biodegradable polyester, which has excellent film forming properties and provides a resin coating film which is flexible, has favorable elongation and is strong to folding, when applied in coatings, adhesives, fiber processing, sheet film processing and paper processing. More specifically, the present invention provides an aqueous dispersion of biodegradable polyester comprising a copolymer of 3HB and 3HH, which has a flexural modulus of 100 to 1500 MPa and a weight average molecular weight of 50,000 to 3,000,000, wherein the copolymer within the aqueous dispersion has an average particle size of 0.1 to 50 μm.
摘要:
An aqueous dispersion of a biodegradable polyester, which comprises a copolymer of 3-hydroxybutylate and 3-hydroxyhexanoate having a weight average molecular weight of 50,000 to 3,000,000 and a flexural modulus of 100 to 1500 MPa, wherein the copolymer has an average particle diameter of 0.1 to 50 μm in the aqueous dispersion. The aqueous dispersion of a biodegradable polyester is excellent in film forming characteristics and can provide a resin coating film which is soft, exhibits good elongation and is proof to bending, when it is applied to a coating material, an adhesive agent, fiber texturing, sheet or film processing, paper conversion or the like.
摘要:
Polypropylene resin expanded particles comprising: a polypropylene resin as a base material resin, the propylene resin having at least two melting peaks on a DSC curve for a second temperature rise measured at a heating rate of 10 g/min with use of a heat flux differential scanning calorimeter (DSC), the at least two melting peaks including (i) a lowest temperature melting peak of not lower than 100° C. and not higher than 130° C. and (ii) a highest temperature melting peak of not lower than 140° C. and not higher than 160° C., the propylene resin having a resin DSC ratio change rate of 0.5%/° C. to 3.0%/° C., the expanded particles having two melting peaks in a DSC measurement made at a first temperature rise at the heating rate of 10 g/min, the two melting peaks including, (i) on a lower temperature side, a melting peak temperature of not lower than 100° C. and not higher than 130° C. and, (ii) on a higher temperature side, a melting peak temperature of not lower than 140° C. and not higher than 160° C. allow an in-mold foaming molded product to be produced of expanded particles that (i) have only a small change in expanded particle DSC ratio, the change corresponding to a change in foaming temperature, (ii) allow production of an in-mold foaming molded product at a very low mold heating steam pressure, (iii) exhibit low distortion, low shrinkage, and a wide range of heating conditions for molding, even if the mold heating steam pressure is increased, (iv) indicate a satisfactory moldability even in a case where the expanded particles are molded with use of, for example, a mold having a complicated shape, a large mold, and (v) keep its properties such as compressive strength, without being impaired largely, in a case where the polypropylene resin expanded particles are used to prepare an in-mold foaming molded product.
摘要:
An object of the present invention is to provide expanded polyhydroxyalkanoate resin beads which are satisfactory and have biodegradability, the molded product thereof, and process for producing the expanded resin beads. The object can be achieved by expanded poly(3-hydroxyalkaonate) (abbreviated to P3HA) resin beads obtained from a P3HA resin composition comprising: a copolymer which comprises repeating units of one or more kinds represented by the formula (1): [—O—CHR—CH2—CO—] (wherein R is alkyl represented by CnH2n+1, provided that n is an integer of 1-15) and is yielded by a microorganism (this copolymer is P3HA); and an isocyanate compound, and having a melt viscosity of 500 Pa·s or higher when examined under the conditions of a shear rate of 122 sec−1 and a temperature of from Tm1 to Tm2, wherein Tm1 is the melting temperature of the P3HA resin composition and Tm2=Tm1+20° C., provided that Tm2
摘要翻译:本发明的目的是提供令人满意并且具有可生物降解性的膨胀的聚羟基链烷酸酯树脂珠,其模制产品,以及用于生产发泡树脂珠的方法。 该目的可以通过由P3HA树脂组合物获得的膨胀的聚(3-羟基乙酸酯)(缩写为P3HA)树脂珠粒来实现,所述树脂珠粒包含:包含由式(1)表示的一种或多种重复单元的共聚物:[-O -CHR-CH2-CO-](其中R是由C n H 2n + 1表示的烷基,条件是n是1-15的整数)并由微生物产生(该共聚物是P3HA); 和异氰酸酯化合物,在剪切速率为122秒-1,温度Tm1〜Tm2的条件下检测时的熔融粘度为500Pa·s以上,Tm1为P3HA树脂的熔融温度 组成,Tm2 = Tm1 + 20℃,条件是Tm2 <180℃
摘要:
It is intended to provide polyhydroxyalkanoate resin foamed particles having a biodegradability and favorable properties, a molded article thereof and a method of producing these resin foamed particles. Namely, resin foamed particles obtained by foaming a copolymer (hereinafter referred to as poly(3-hydroxyalkanoate); abbreviated as P3HA), which is produced by a microorganism, has a weight-average molecular weight of from 50000 to 2000000 and has a repeating unit represented by the general formula (1): [—CHR—CH2—CO—O—] (wherein R represents an alkyl group represented by CnH2n+1 and n is an integer of from 1 to 15), a molded article formed by using these foamed particles and a method of producing these foamed particles.
摘要翻译:本发明提供具有生物降解性和良好性能的聚羟基链烷酸酯树脂发泡粒子,其成型品和这些树脂发泡粒子的制造方法。 即,通过发泡由微生物制造的共聚物(以下称为聚(3-羟基链烷酸酯);缩写为P3HA)得到的树脂发泡粒子的重均分子量为50000〜2000000,重复 由通式(1)表示的单元:[-CHR-CH 2 -CO-O-](其中R表示由C n H 2n + 1表示的烷基,n表示1〜15的整数),由 使用这些泡沫颗粒和这些泡沫颗粒的制造方法。
摘要:
The object is to provide a molded product of foamed particles obtained by charging biodegradable resin foamed particles which are of vegetable origin and excellent in environmental compatibility into a mold, followed by heat molding, which molded product is not accompanied by post shrinkage after the molding with a wide range of variation of processing in the molding. Further, P3HA resin foamed particles being composed of a resin composition that comprises an isocyanate compound, and a polymer, poly(3-hydroxyalkanoate), having a recurring unit represented by the general formula (1): [—O—CHR—CH2—CO—] (1) (wherein R represents an alkyl group represented by CnH2n+1, wherein n is an integer of from 1 to 15) produced by a microorganism are provided.
摘要:
The present invention has for its object to obtain a composition and a molded product thereof excellent in processability, strength, impact resistance, heat resistance and water resistance and, when discarded, are biodegradable under the action of microorganisms and the like in an aerobic or anaerobic environment and, further, a plant origin composition and a molded product thereof, which can positively fix carbon dioxide on the earth. Such characteristics can hardly be attained with the above-mentioned chemically synthesized aliphatic polyesters or natural polymers such as starch. The present invention relates to a composition which comprises kenaf fibers and a poly(3-hydroxyalkanoate) produced by microorganisms and comprising a repeating unit represented by the formula (1): [—O—CHR—CH2—CO—] in the formula, R represents an alkyl group represented by CnH2n+1 with n representing an integer of 1 to 15, and a molded product thereof.
摘要翻译:本发明的目的在于获得加工性,强度,耐冲击性,耐热性和耐水性优异的组合物及其成型品,并且在废弃时,在微生物等的作用下,在需氧或厌氧 环境,还有植物来源组合物及其成型体,能够将二氧化碳固定在地球上。 上述化学合成的脂族聚酯或天然聚合物如淀粉难以达到这些特性。 本发明涉及一种组合物,其包含由微生物制成的洋麻纤维和聚(3-羟基链烷酸酯),并且包含由式(1)表示的重复单元:<?in-line-formula description =“In-Line Formulas” end =“lead”?> [ - O-CHR-CH 2 -CO - ] <?in-line-formula description =“In-line Formulas”end =“tail”?> 式中,R表示由C n H 2n + 1 N表示的烷基,n表示1〜15的整数,及其成型体。
摘要:
A method for producing polyolefin resins granules are disclosed, which comprises extruding by using a homodirectional (co-rotating) twin-screw kneading extruder a polyolefin resin from a die nozzle having a diameter of less than 2 mm and a discharge amount per hole of 0.5-8 Kg/hr into warm water of 5-90.degree. C. which is lower than a temperature of the resin by 140-220.degree. C., and cutting the extrudate with a cutter blade in the warm water. According to this invention, uniformly dispersed compounds are obtained, and switching of a raw resin can be done speedily and economically, and further, resin granules of a desired shape can be produced.
摘要:
A substantially water-impermeable polyolefin foam made of expandable polyolefin beads. The polyolefin foam is prepared by a particular process in which after heating expandable polyolefin beads and before cooling the heated beads in a mold, the heated beads were allowed to stand in the state that the polyolefin resin maintains the flowability.
摘要:
Expandable thermoplastic polymer beads and method of producing same, wherein a core of a polymer of one or more vinyl monomers is substantially surrounded by a layer of a polyolefin comprising one or more vinyl monomers, with a foaming agent contained in at least the core.