[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-324045-105":3,"detail-sidebar-cat-0-en-105":81,"doc-detail-324045-en":130},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":74,"head_meta":76,"extra_data":78,"updated_unix":80},105,"en","polyvinyl-alcohol-based-synthetic-fibers-and-method-of-improving-the-thermal-stability-of-products-thereof","POLYVINYL ALCOHOL-BASED SYNTHETIC FIBERS AND METHOD OF IMPROVING THE THERMAL STABILITY OF PRODUCTS THEREOF","","Polyvinyl alcohol (PVA)-based synthetic fibers and their products are targeted for improved thermal stability to prevent deterioration in mechanical properties caused by thermal and oxidative degradation during long-term high-temperature use. The disclosure explains combining one or more phenols, guanidines, and amines (or derivatives) with one or more dithioic acids (or derivatives) to achieve superior stability versus using dithio compounds or related stabilizers alone. Practical examples include wet/dry/semimolten incorporation methods and heat treatment conditions, with strength-decline behavior evaluated against untreated originals.",{"@graph":14,"@context":73},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/research-report/","Research & Report",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/polyvinyl-alcohol-based-synthetic-fibers-and-method-of-improving-the-thermal-stability-of-products-thereof/324045/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/polyvinyl-alcohol-based-synthetic-fibers-and-method-of-improving-the-thermal-stability-of-products-thereof/324045.png","ImageObject",300,407,{"name":42,"@type":43},"Aria","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-29","2026-09-21",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",10,{"@type":57,"mainEntity":58},"FAQPage",[59,65,69],{"name":60,"@type":61,"acceptedAnswer":62},"What problem does the invention address for PVA-based synthetic fibers?","Question",{"text":63,"@type":64},"The invention addresses thermal and oxidative degradation that causes coloration, aging, embrittlement, and mechanical property deterioration during prolonged high-temperature use.","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"How does the invention improve thermal stability?",{"text":68,"@type":64},"It uses a joint use of one or more phenols, guanidines or amines (or derivatives) together with one or more dithioic acids (or derivatives) in PVA-based synthetic fibers and related products.",{"name":70,"@type":61,"acceptedAnswer":71},"How are the stabilizer compounds introduced into the fibers or solutions?",{"text":72,"@type":64},"The compounds can be added via solution or aqueous dispersion, followed by wet spinning, dry spinning, or semi-molten spinning; alternatively, spun fibers can be immersed in the treating solution or dispersion, then subjected to drying steps.","https://schema.org",{"og:url":32,"og:type":75,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":77,"canonical":32},"index,follow",{"doc_id":79,"site_id":7},324045,1790269680,{"code":4,"msg":82,"data":83},"success",[84,88,92,96,101,106,111,115,120,123,126],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":85,"show_sort_weight":86,"slug":87},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":89,"show_sort_weight":90,"slug":91},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":93,"show_sort_weight":94,"slug":95},"Exam",70,"exam",{"id":97,"doc_module":4,"doc_module_name":25,"category_name":98,"show_sort_weight":99,"slug":100},5,"Comic",60,"comic",{"id":102,"doc_module":4,"doc_module_name":25,"category_name":103,"show_sort_weight":104,"slug":105},6,"Technology",50,"technology",{"id":107,"doc_module":4,"doc_module_name":25,"category_name":108,"show_sort_weight":109,"slug":110},7,"Healthcare",40,"healthcare",{"id":112,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":113,"slug":114},8,30,"research-report",{"id":116,"doc_module":4,"doc_module_name":25,"category_name":117,"show_sort_weight":118,"slug":119},9,"Religion & Spirituality",20,"religion-spirituality",{"id":118,"doc_module":4,"doc_module_name":25,"category_name":121,"show_sort_weight":118,"slug":122},"World Cup","world-cup",{"id":55,"doc_module":4,"doc_module_name":25,"category_name":124,"show_sort_weight":55,"slug":125},"Lifestyle","lifestyle",{"id":127,"doc_module":4,"doc_module_name":25,"category_name":128,"show_sort_weight":97,"slug":129},19,"General","general",{"code":4,"msg":82,"data":131},{"doc_id":79,"user_id":132,"nickname":42,"user_avatar":133,"doc_module":4,"category_id":112,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":55,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":139,"language":140,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":12,"update_tm":144,"read_time":145,"preview_page_count":4},2336464648322,"https://ap-avatar.wpscdn.com/avatar/2200025388227c56fec?_k=1778556882303663488","Sato,H.;Matsuura,O.;Tsuchiya,M.Polyvinyl alcohol-based synthetic fibersand method of improving the thermal sta-bility of products thereof.11 p.  \nPatent(Japanese)No.47-29048(1972).Filed:  TRANSLATION NO.4423  \nTRANSLATION  \n# PATENT BUREAU OF JAPANOFFICIAL GAZET'TE FOR UNEXAMINED PATENTS\n\nJapanese Patent Application Publication Kokai7-29048-1972Publication DateJuly 31,1972  \nNumber of Inventions one  \n(total 6 pages)  \nDoInternational class4apanese ClassC 08 f48 D 81D 06 m48 D 0125(1)C 131·l  \nPOLYVINYL ALCOHOL-BASED SYNTHETIC FIBERS AND METHOD OFIMPROVING THE THERMAL STABILITY OF PRODUCTS THEREOF  \n45716-1968  \nApplication No.:  \nApplication Date:  \nJuly 1,1968  \nHidechika SatoOsamu Matsuura  \nInventors:  \nAko-shi,Sakoshi 329Masaaki TsuchiyaAko-shi,Kamikaiya 730-1  \nApplicant:  \nUnitica Ltd.  \nAmagasaki-shi,HigashiHonmachi 1-50  \nPatent Attorney:  \nYuzo Kotama  \n## Specifications\n\nBrief Description of Drawing  \nThe figure illustrates the relation between the blendingproportions of thermal stabilizer in polyvinyl alcohol-basedsynthetic fibers and the rate of decline in strength due to hightemperature treatment.  \n# Detailed Description of the Invention\n\nThis invention concerns polyvinyl alcohol(below abbreviatedPVA)-based synthetic fibers and a method of improving the thermalstability of products thereof.  The objective is to produce PVA-based synthetic fibers and products thereof which are stable toheat and which prevent deterioration in the various mechanicalproperties of PVA-based synthetic fibers and of products thereofaccompanying thermal degradation and oxidative degradation in theevent of long term use at high temperatures.  \nGenerally,coloration,aging and embrittlement develop whenPVA-based synthetic fibers are treated for prolonged periods oftime at high temperatures or are placed in a similar state duringuse,and the mechanical properties deteriorate.  The cause is thethermal degradation and oxidative degradation of PVA-based  \nsynthetic fibers.  In general,a reducing substance is used as athermal stabilizer to prevent this.  Such a substance is added tothe fibers and is quite effective,but a satisfactory thermalstabilizer which can easily be used industrially has not beendiscovered since the method of its use is very complex.Moreover,satisfactory thermal stabilization has not been  \nachieved through the addition of other polymer sybstances such asaromatic amine compounds or phenols,which are radical chainingsuppressors used in natural rubber substances and polyolefinsubstances,for example,to PVA-based synthetic fibers.  \nThe inventors have conducted various studies into thethermal stability of PVA-based synthetic fibers and havediscovered that PVA-based synthetic fibers with outstandingthermal stability and products thereof can be produced by jointuse of phenol,guanidine or amine compounds,which cannotsatisfactorily improve the thermal stability of PVA-based  \nDigitized by the Internet Archivein 2017  \nsynthetic fibers alone,with dithioic acid compounds,therebycompleting this invention.  Specifically,this invention concernsa method of improving the thermal stability of PVA-based  \nsynthetic fibers and products thereby characterized by the jointuse of one or more phenols,guanidines and amines or derivativesthereof with one or more dithioic acids or their derivatives inPVA-based synthetic fibers and products thereof.  \nPossible examples of the phenols used in this inventioninclude 4·4'·thiobis(6·tertiary butyl·3·methylphenol),  \n2·2·methylene·bis(4·methyl·6·tertiary butylphenol).  Possibleexamples of guanidines and amines include diphenylguanidine,di·0·triguanidine and phenyl·β·naphthylamine,  \nN·N'·diphenyl·P·phenylenediamine,2·2·4 trimethyl 1·2  \ndihydroquinoline polymer,or derivatives thereof.  Examples ofthe dithioic acids which can be used jointly include  \ndiethyldithiocarbamate,dibutyldithiocarbamate or derivativesthereof.  Since virtually none of these compounds dissolves inwater,they would be dissolved in solv","cbCaieuchko9lPlW","https://ap.wps.com/l/cbCaieuchko9lPlW","pdf",948081,26,"English","# Specifications\n## Brief Description of Drawing\n# Detailed Description of the Invention\n## Experiment and Results","[{\"question\":\"What problem does the invention address for PVA-based synthetic fibers?\",\"answer\":\"The invention addresses thermal and oxidative degradation that causes coloration, aging, embrittlement, and mechanical property deterioration during prolonged high-temperature use.\"},{\"question\":\"How does the invention improve thermal stability?\",\"answer\":\"It uses a joint use of one or more phenols, guanidines or amines (or derivatives) together with one or more dithioic acids (or derivatives) in PVA-based synthetic fibers and related products.\"},{\"question\":\"How are the stabilizer compounds introduced into the fibers or solutions?\",\"answer\":\"The compounds can be added via solution or aqueous dispersion, followed by wet spinning, dry spinning, or semi-molten spinning; alternatively, spun fibers can be immersed in the treating solution or dispersion, then subjected to drying steps.\"}]","POLYVINYL ALCOHOL-BASED SYNTHETIC FIBERS AND METHOD OF IMPROVING THE THERMAL STABILITY OF PRODUCTS THEREOF | PDF",1789966881,66]