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公开(公告)号：US20220380490A1
公开(公告)日：2022-12-01
申请号：US17552224
申请日：2021-12-15
申请人： Agricultural Product Processing Research Institute, Chinese Academy of Tropical Agricultural Science
发明人： Jinlong Tao , Na Kong , Jizhen Zhang , Zhifeng Li , Jihua Li , Zirong Luo , Mingzhe Lv , Pengfei Zhao
摘要： A method for concentrating rubber emulsion and a product prepared by the method are provided, the method includes: a concentrated latex is obtained by separating a superabsorbent resin added in advance into a rubber emulsion with a solid content of 0.01-70% after stirring and concentrating the resin-added rubber emulsion. The method requires simple equipment and consumes less energy, and the prepared polymer emulsion has a solid content up to 76%; the superabsorbent resin adopted herein is reusable after drying, which therefore effectively reduces the production cost; natural latex concentrated by the method has rather high yields of dry rubber and little wastewater production; products prepared from the concentrated natural latex have excellent mechanical property, aging resistance and adhesive property; and concentrating natural latex according to this method does not require advance agglomeration, which reduces the production procedures and improves the production efficiency significantly.
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公开(公告)号：US20180371111A1
公开(公告)日：2018-12-27
申请号：US16062176
申请日：2016-12-13
申请人： Versalis S.P.A.
摘要： The present invention relates to the industrial sector of extracting and processing natural rubber, and other components, from plant material. In particular, the invention relates to a process for extracting latex, resin and rubber from guayule and/or guayule-type plants, which comprises harvest, preservation, mechanical and chemical treatment of the plant parts, which is applicable both in the laboratory and on an industrial scale and is characterised by significantly high yields and high quality of the extracted products.
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公开(公告)号：US3607807A
公开(公告)日：1971-09-21
申请号：US3607807D
申请日：1969-06-13
CPC分类号： C08C1/075
摘要： The preparation of a high solids, low viscosity rubber latex by blending a fast reaction latex of small particles with a slow reaction latex of large particles, before concentration, and preferably before stripping for removal of unreacted monomers, stripping and concentrating the blend to about 50 percent solids, freezing the concentrate after acidifying to a pH of about 8.3, and then thawing and concentrating the frozen blend to a solids content above 60 percent.
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公开(公告)号：US11028236B2
公开(公告)日：2021-06-08
申请号：US16328206
申请日：2017-08-09
摘要： The invention relates to a method for processing dandelion plant components, particularly dandelion plant components of the Taraxacum kok-saghyz variety, in which, according to the method, rubber is obtained as a first valuable product, said method being characterised by the following steps: A) grinding and/or squeezing the dandelion plant components, preferably while adding water to form a pulp; and B) first separation of the pulp into at least one phase 80 which is high in inulin and low in rubber and at least one phase 90 which is high in rubber and low in inulin, the phase 90 which is high in rubber and low in inulin forming the first valuable product or the first valuable product being obtained from the phase which is high in rubber and low in inulin.
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公开(公告)号：US10934399B2
公开(公告)日：2021-03-02
申请号：US16071997
申请日：2017-01-26
申请人： ZEON CORPORATION
发明人： Hidetake Ishii , Junji Kodemura
IPC分类号： C08J3/07 , C08L53/02 , B29C41/00 , C08J5/02 , C08F36/08 , C08C1/075 , B60C1/00 , C08F297/04 , C08F6/20 , C08J3/05 , C08K5/098 , B29C41/14
摘要： A method for producing a polymer latex, including an emulsification step of emulsifying a polymer solution obtained by dissolution of synthetic polyisoprene and/or a styrene-isoprene-styrene block copolymer having a molecular weight distribution of 1.0 to 2.6 in an organic solvent, in water in the presence of a surfactant, to thereby obtain an emulsified liquid, wherein as the synthetic polyisoprene and/or styrene-isoprene-styrene block copolymer, used are/is synthetic polyisoprene and/or a styrene-isoprene-styrene block copolymer which, when dissolved in an organic solvent to thereby be formed into a polymer solution having a viscosity at a temperature of 60° C. of 20,000 cps, have/has a solid content concentration in the range of 10 to 60% by weight.
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公开(公告)号：US20180371112A1
公开(公告)日：2018-12-27
申请号：US16062178
申请日：2016-12-13
申请人： Versalis S.p.A.
发明人： Cecilia QUERCI , Maria CALDARARO , Mirko OLIOSI , Matteo RUSSO
摘要： The present invention relates to the sector of the industry for extracting and processing natural rubber, and other components, from plant material. In particular, the invention relates to a process for extracting resin and rubber from guayule and/or guayule type plants, which comprises harvesting, preserving and mechanically and chemically treating the parts of the plant, applicable both in the laboratory and on an industrial scale, characterized by significantly high quantity yields and high quality of the extracted products.
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公开(公告)号：US2332902A
公开(公告)日：1943-10-26
申请号：US32630040
申请日：1940-03-27
IPC分类号： C08C1/075
CPC分类号： C08C1/075 , Y10S528/937
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公开(公告)号：US10738135B2
公开(公告)日：2020-08-11
申请号：US16062178
申请日：2016-12-13
申请人： Versalis S.p.A.
发明人： Cecilia Querci , Maria Caldararo , Mirko Oliosi , Matteo Russo
摘要： The present invention relates to the sector of the industry for extracting and processing natural rubber, and other components, from plant material. In particular, the invention relates to a process for extracting resin and rubber from guayule and/or guayule type plants, which comprises harvesting, preserving and mechanically and chemically treating the parts of the plant, applicable both in the laboratory and on an industrial scale, characterized by significantly high quantity yields and high quality of the extracted products.
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公开(公告)号：US20190292331A1
公开(公告)日：2019-09-26
申请号：US16227154
申请日：2018-12-20
摘要： An aqueous elastomer dispersion includes a dispersed phase and an aqueous phase. The dispersed phase includes an elastomer including curable aliphatic conjugated-diene elastomers, such as polyisoprene, and a minor amount of at least one additive. The aqueous phase includes water and other optional components in either a soluble state or a dispersion state. The aqueous elastomer dispersion may be prepared by dissolving an elastomer, such as rubber, and additives in a solvent mixture and then converting the resulting solution into an aqueous emulsion. The aqueous emulsion is concentrated and the solvent is stripped from it to yield a dilute latex. The dilute latex that is obtained is concentrated again. Articles made from the aqueous elastomer dispersion include medical gloves, condoms, probe covers, dental dams, finger cots, catheters and the like.
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