{"id":3411,"date":"2020-04-06T18:15:23","date_gmt":"2020-04-06T16:15:23","guid":{"rendered":"https:\/\/academy.bormawachs.com\/?page_id=3411"},"modified":"2021-11-02T17:57:20","modified_gmt":"2021-11-02T16:57:20","slug":"sistemibaseacqua","status":"publish","type":"page","link":"https:\/\/academy.bormawachs.com\/en\/sistemibaseacqua\/","title":{"rendered":"WATER BASED SYSTEMS"},"content":{"rendered":"

[vc_row][vc_column][vc_custom_heading text=”Water based systems” font_container=”tag:h2|font_size:32|text_align:left” google_fonts=”font_family:Roboto%3A100%2C100italic%2C300%2C300italic%2Cregular%2Citalic%2C500%2C500italic%2C700%2C700italic%2C900%2C900italic|font_style:100%20light%20regular%3A100%3Anormal”][\/vc_column][\/vc_row][vc_row][vc_column][vc_empty_space][vc_separator style=”shadow”][vc_empty_space][\/vc_column][\/vc_row][vc_row][vc_column width=”1\/2″][vc_custom_heading text=”Natural latex and rubber ” font_container=”tag:p|font_size:32|text_align:left” google_fonts=”font_family:Roboto%3A100%2C100italic%2C300%2C300italic%2Cregular%2Citalic%2C500%2C500italic%2C700%2C700italic%2C900%2C900italic|font_style:100%20light%20regular%3A100%3Anormal”][vc_column_text]The early history of water based systems (emulsion polymerization) is connected with the hystory of latex and the natural rubber<\/strong>.
\nMany plants and trees exude when cut a white, milk-like liquid which is called latex (from Latin \u201clatex\u201d=milky fluid). Some of these latices coagulate on exposure to air to more or less sticky, elastic masses<\/strong>.
\nThe Olmec people of Mesoamerica extracted and produced forms of primitive rubber from latex-producing trees, such as Castilla elastica as early as 3,600 years ago.
\nThe Maya called such trees \u201cweeping wood\u201d (caa=wood, o-chu=weeping)<\/strong>. The spelling was transformed too: Caa ochu become cauchuc in old Spanish and caoutchouc in French.[\/vc_column_text][\/vc_column][vc_column width=”1\/2″][vc_images_carousel images=”4064,4046″ img_size=”full” autoplay=”yes” wrap=”yes”][\/vc_column][\/vc_row][vc_row][vc_column][vc_empty_space][vc_separator style=”shadow”][vc_empty_space][\/vc_column][\/vc_row][vc_row][vc_column width=”1\/2″][vc_custom_heading text=”Synthetic latex and rubber” font_container=”tag:p|font_size:32|text_align:left” google_fonts=”font_family:Roboto%3A100%2C100italic%2C300%2C300italic%2Cregular%2Citalic%2C500%2C500italic%2C700%2C700italic%2C900%2C900italic|font_style:100%20light%20regular%3A100%3Anormal”][vc_column_text]From 1906, in Farbenfabriken Bayer (Germany), Fritz Hofmann<\/strong> began the search for a synthetic alternative to natural rubber<\/strong> for use in tyres and for the electrical industry. In less than 3 years he managed the synthesis at high temperature of rubber starting from methyl isoprene, which was patented in the Imperial Patent Office in Germany on September 12, 1909<\/strong>.
\nThe idea of using aqueous suspension or emulsion and emulsified monomer was developed starting from the observation of natural latex rubber, which is produced by trees at room temperature in dispersed particles stabilized by colloidal polymers.
\nIn January 26, 1912<\/strong> Hofmann patented the process for preparing artificial rubber starting from isoprene in viscous aqueous solutions of albumin<\/strong>. In 1913 he patented in USA a caoutchouc substance and process fo making the same which comprised polymerizing a butadiene in the presence of an aqueous colloidal solution.
\nIn 1912, his research on rubber earned him the gold medal Emil Fischer, who granted the Association of German chemists.[\/vc_column_text][\/vc_column][vc_column width=”1\/2″][vc_images_carousel images=”4045,4010″ img_size=”full” speed=”4000″ autoplay=”yes” wrap=”yes”][\/vc_column][\/vc_row][vc_row][vc_column][vc_empty_space][vc_separator style=”shadow”][vc_empty_space][\/vc_column][\/vc_row][vc_row][vc_column width=”1\/2″][vc_custom_heading text=”Acrylic emulsion” font_container=”tag:p|font_size:32|text_align:left” google_fonts=”font_family:Roboto%3A100%2C100italic%2C300%2C300italic%2Cregular%2Citalic%2C500%2C500italic%2C700%2C700italic%2C900%2C900italic|font_style:100%20light%20regular%3A100%3Anormal”][vc_column_text]<\/p>\n

In the years immediately following\u00a0World War II, nearly 16 million American\u00a0servicemen and women returned to\u00a0civilian life<\/strong>, setting off an unprecedented\u00a0housing and baby boom. By\u00a01950<\/strong>, housing starts soared to 1.7 million,\u00a0ten times as many as in 1944. And all of\u00a0these new homes needed paint, both\u00a0inside and out.\u00a0Solvent-based paints, which dominated\u00a0the market at the time, were made\u00a0with alkyd resins. They were\u00a0odorous, toxic, flammable and especially\u00a0hard to clean up. Despite the paint\u2019s\u00a0trying nature, sales were brisk.\u00a0There was a lot of room for improvement.\u00a0And profit. That is, if an alternative\u00a0could be found. Two\u00a0chemists, Benjamin Kine and\u00a0Gerald Brown<\/strong>, suggested that aqueous\u00a0acrylic emulsion technology could be\u00a0used to make terrific house paints<\/strong>.\u00a0The acrylic\u00a0emulsions that would\u00a0develop in the years ahead have some\u00a0amazing qualities. Emulsion polymers\u00a0are prepared in water and stabilized\u00a0with surfactants, molecules that are\u00a0hydrophilic (\u201cwater-loving\u201d) in one segment\u00a0and hydrophobic (\u201cwater-hating\u201d)\u00a0in the other. Emulsion polymers begin\u00a0forming when a free radical \u2014 acting\u00a0as an initiator \u2014 breaks a double bond\u00a0between two carbon atoms in an acrylic\u00a0monomer, starting a reaction that\u00a0causes as many as 10,000 monomer\u00a0units to bind together into a polymer\u00a0chain<\/strong>. As these chains take shape, they\u00a0grow into submicron-sized spheres.\u00a0Within each sphere there are about 300\u00a0acrylic polymer chains<\/strong>.<\/p>\n

[\/vc_column_text][\/vc_column][vc_column width=”1\/2″][vc_images_carousel images=”4041,4043,4044″ img_size=”full” speed=”3000″ autoplay=”yes” wrap=”yes”][\/vc_column][\/vc_row][vc_row][vc_column][vc_empty_space][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]<\/p>\n

HOME<\/a>\u00a0>\u00a0MATTER<\/a>\u00a0>\u00a0WATER<\/a>\u00a0> WATER BASED SYSTEMS >\u00a0SOLUTIONS<\/a><\/p>\n

[\/vc_column_text][\/vc_column][\/vc_row]<\/p>","protected":false},"excerpt":{"rendered":"

[vc_row][vc_column][vc_custom_heading text=”Water based systems” font_container=”tag:h2|font_size:32|text_align:left” google_fonts=”font_family:Roboto%3A100%2C100italic%2C300%2C300italic%2Cregular%2Citalic%2C500%2C500italic%2C700%2C700italic%2C900%2C900italic|font_style:100%20light%20regular%3A100%3Anormal”][\/vc_column][\/vc_row][vc_row][vc_column][vc_empty_space][vc_separator style=”shadow”][vc_empty_space][\/vc_column][\/vc_row][vc_row][vc_column width=”1\/2″][vc_custom_heading text=”Natural latex and rubber ” font_container=”tag:p|font_size:32|text_align:left” google_fonts=”font_family:Roboto%3A100%2C100italic%2C300%2C300italic%2Cregular%2Citalic%2C500%2C500italic%2C700%2C700italic%2C900%2C900italic|font_style:100%20light%20regular%3A100%3Anormal”][vc_column_text]The early history of water based systems (emulsion polymerization) is connected with the hystory of latex<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-3411","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/academy.bormawachs.com\/en\/wp-json\/wp\/v2\/pages\/3411","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/academy.bormawachs.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/academy.bormawachs.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/academy.bormawachs.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/academy.bormawachs.com\/en\/wp-json\/wp\/v2\/comments?post=3411"}],"version-history":[{"count":29,"href":"https:\/\/academy.bormawachs.com\/en\/wp-json\/wp\/v2\/pages\/3411\/revisions"}],"predecessor-version":[{"id":4445,"href":"https:\/\/academy.bormawachs.com\/en\/wp-json\/wp\/v2\/pages\/3411\/revisions\/4445"}],"wp:attachment":[{"href":"https:\/\/academy.bormawachs.com\/en\/wp-json\/wp\/v2\/media?parent=3411"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}