201035145 六、發明說明： 【發明所屬之技術領域】 • 本發明是有關於一種發泡組成物，且特別是有關於一 種生物可分解性之兩液型發泡組成物。 【先前技術】 一般傳統塑膠製程多為淋膜、發泡、射出成型等。其 中，在灌注發泡製程中，以兩液型灌注發泡最為常見。兩 Ο 液混合之原理在於利用具可反應產生發泡氣體的兩種原 料，藉由外力使二者混合後發生化學變化，經模具形塑而 生產出所需的成品。此種兩液型灌注發泡技術可以快速生 產塑膠發泡物，並且供應各種產業需求。 但由於目前全球環保議題隨著市場需求提昇，不僅各 國競相修法要求塑膠產品具備分解能力，且消費者也皆具 有減少使用無法分解循環塑膠產品的意識，故越來越多傳 統塑膠產品改以生物分解性塑膠取代。 〇 現今生物分解性塑膠技術在使用時，生物分解性塑膠 可具有與一般傳統塑膠同樣的機能性，若循正常處理方式 可於短時間内達完全分解。而若是被惡意使用後丟棄在地 表上海水中，也可因生物分解性塑膠受到微生物的作用而 終至使其分解成二氧化碳與水。 【發明内容】 因此，本發明之一態樣是在提供一種生物可分解性之 3 201035145 兩液型發泡組成物，以兩溶液混合以進行發泡反應。而此 兩溶液在混合前，各自得以均勻混合，於常溫下皆呈現液 狀，易於儲存。 依據本發明一實施例，一種生物可分解性之兩液型發 泡組成物包含主溶液與副溶液。主溶液包含5〜50%重量 比之聚乳酸粉末、45〜90%重量比之聚己内酯多元醇與1 〜5%重量比之發泡劑混合而成。副溶液包含多元醇與異氰 酸酯，異氰酸酯之氰酸鹽官能基與多元醇之羥基比值為 1.01〜2.1，以產生氰酸鹽基過量之醇類預聚物。上述主溶 液與副溶液以體積比1 : 1〜10 : 1混合後進行發泡反應。 依據本發明另一實施例，一種生物可分解發泡體，係 由上述之生物可分解性之兩液型發泡配方經發泡反應而 成。 應用本發明之生物可分解性之兩液型發泡組成物，將 主溶液與副溶液分別配製，兩者於混合攪拌進行發泡反應 之前，皆可穩定於室溫下保存。此外，分別配製之主溶液 與副溶液中之各成分也可先行混合均勻，以避免各成分間 因性質不同而產生混合不均之情形。 【實施方式】 本發明之一實施方式中提出一種生物可分解性之兩液 型發泡組成物，包含主溶液與副溶液，需將主溶液與副溶 液混合後，發泡反應才會進行。 上述主溶液包含聚乳酸粉末、聚己内酯多元醇與發泡 4 201035145 劑。聚乳酸與聚己内酯皆為生物可分解性聚合物，作為發 泡反應中之主要反應物。主溶液中聚乳酸粉末含量為5〜 50%重量比。 上述主溶液中之聚己内酯多元醇的分子量為900。在 一實施例中，聚己内酯多元醇與丙三醇混合後，再與聚乳 酸粉末、發泡劑混合成主溶液。主溶液中聚己内酯多元醇 含量為45〜90%重量比。 發泡劑用以幫助聚乳酸與聚己内酯多元醇進行發泡反 應，發泡劑之添加量決定後續生物可分解之兩液型發泡組 成物之發泡程度。發泡劑含量越多則發泡形成之泡沫孔徑 越大。在一實施方式中，直接使用聚乳酸溶液作為發泡劑。 然而由於聚乳酸本身親水性不好，因此使用強制乳化法使 聚乳酸得以分散於水溶液中。作為發泡劑之聚乳酸溶液為 聚乳酸、乳化劑與有效量之水調配而成，以乳化劑幫助增 加聚乳酸之親水值。主溶液中發泡劑含量為1〜5 %重量比。 前述副溶液中包含多元醇與異氰酸酯，異氰酸酯之氰 酸鹽官能基與多元醇之羥基比值為1.01〜2.1，兩者反應後 生成氰酸鹽官能基過量之醇類預聚物。多元醇如聚己内酯 多元醇或乙二醇。在一實施方式中，使用於形成醇類預聚 物之聚己内酯多元醇分子量為2000〜3000。 異氰酸酯之氰酸鹽官能基（-NCO)具有將羥基（-OH) 群、羧基（-COOH)群或胺基（-NH)群轉換及鏈延長反 應之功能。因此，在一實施方式中，利用異氰酸酯之氰酸 鹽官能基對多元醇之羥基進行鹽基轉換與鏈延長反應，以 5 201035145 形成醇類預聚物。異氰酸酯例如曱苯二異氰酸酯（Tolylene diisocyanate，TDI )、異佛爾酮二異氰酸酯（Is〇phorone diisocyanat，IPDI )、二苯基甲烷二異氰酸酯 (Diphenylmethane-4,4’-diisocyanate，MDI)、聯苯醚二異 氰酸酯（BODI)、六次曱基二異氰酸酯（HDI)、曱基環己 炫二異氰酸酯（HTDI )或二環己基曱烷二異氰酸酯 (HMDI)。201035145 6. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a foaming composition, and more particularly to a two-liquid foaming composition which is biodegradable. [Prior Art] Generally, the traditional plastic process is mostly laminating, foaming, injection molding, and the like. Among them, in the perfusion foaming process, the two-liquid type infusion foaming is the most common. The principle of mixing the two liquids is to use the two kinds of raw materials which can react to generate the foaming gas, and then chemically change after mixing the two by external force, and the desired finished product is produced by molding the mold. This two-liquid perfusion foaming technology can quickly produce plastic foams and supply a variety of industrial needs. However, as the current global environmental protection issues increase with the market demand, not only do the countries competing for the law require plastic products to have the ability to decompose, but consumers also have the awareness of reducing the use of plastic products that cannot be decomposed, so more and more traditional plastic products are converted to biological Substituted by decomposable plastic. 〇 When biodegradable plastic technology is used today, biodegradable plastics can have the same functionality as conventional plastics. If they are processed normally, they can be completely decomposed in a short time. If it is disposed of in Shanghai water on the surface after being used maliciously, it can also be decomposed into carbon dioxide and water by the action of microorganisms. SUMMARY OF THE INVENTION Accordingly, one aspect of the present invention provides a bio-decomposable 3 201035145 two-liquid foam composition in which two solutions are mixed to carry out a foaming reaction. The two solutions are uniformly mixed before mixing, and are liquid at room temperature, and are easy to store. According to an embodiment of the invention, a biodegradable two-liquid foam composition comprises a primary solution and a secondary solution. The main solution contains 5 to 50% by weight of polylactic acid powder, 45 to 90% by weight of polycaprolactone polyol, and 1 to 5% by weight of a foaming agent. The secondary solution comprises a polyol and an isocyanate, and the ratio of the cyanate functional group of the isocyanate to the hydroxyl group of the polyol is from 1.01 to 2.1 to produce an excess of the cyanate group. The main solution and the side solution are mixed at a volume ratio of 1:1 to 10:1, and then subjected to a foaming reaction. According to another embodiment of the present invention, a biodegradable foam is obtained by a foaming reaction of the above-described biodegradable two-liquid foaming formulation. By applying the biodegradable two-liquid foaming composition of the present invention, the main solution and the sub-solution are separately prepared, and both can be stored at room temperature until they are mixed and stirred for foaming reaction. In addition, the components in the main solution and the sub-solution separately prepared may be mixed first to avoid uneven mixing between the components due to different properties. [Embodiment] In one embodiment of the present invention, a biodegradable two-liquid foaming composition comprising a main solution and a side solution is provided, and the foaming reaction is carried out after the main solution and the auxiliary solution are mixed. The above main solution comprises polylactic acid powder, polycaprolactone polyol and foaming 4 201035145 agent. Both polylactic acid and polycaprolactone are biodegradable polymers as the main reactants in the foaming reaction. The polylactic acid powder content in the main solution is 5 to 50% by weight. The polycaprolactone polyol in the above main solution has a molecular weight of 900. In one embodiment, the polycaprolactone polyol is mixed with glycerin, and then mixed with a polylactic acid powder or a foaming agent to form a main solution. The polycaprolactone polyol content in the main solution is 45 to 90% by weight. The foaming agent is used to assist the foaming reaction between the polylactic acid and the polycaprolactone polyol, and the amount of the foaming agent is determined to determine the degree of foaming of the subsequently biodegradable two-liquid foaming composition. The more the blowing agent content, the larger the foamed pore size of the foam. In one embodiment, a polylactic acid solution is directly used as a blowing agent. However, since polylactic acid itself is not hydrophilic, a forced emulsification method is used to disperse polylactic acid in an aqueous solution. The polylactic acid solution as a foaming agent is prepared by mixing polylactic acid, an emulsifier and an effective amount of water, and an emulsifier is used to increase the hydrophilic value of the polylactic acid. The content of the blowing agent in the main solution is 1 to 5% by weight. The secondary solution contains a polyol and an isocyanate, and the ratio of the cyanate functional group of the isocyanate to the hydroxyl group of the polyol is from 1.01 to 2.1, and the two react to form an alcohol prepolymer having an excess of cyanate functional groups. Polyols such as polycaprolactone polyols or ethylene glycols. In one embodiment, the polycaprolactone polyol used to form the alcohol prepolymer has a molecular weight of from 2000 to 3000. The isocyanate cyanate functional group (-NCO) has a function of converting a hydroxyl group (-OH) group, a carboxyl group (-COOH) group or an amine group (-NH) group and chain extension reaction. Thus, in one embodiment, the hydroxyl group of the polyol is subjected to a base group reaction and a chain extension reaction using a cyanate functional group of an isocyanate to form an alcohol prepolymer at 5 201035145. Isocyanates such as Tolylene diisocyanate (TDI), Isofphorone diisocyanat (IPDI), Diphenylmethane-4, 4'-diisocyanate (MDI), Diphenyl ether Diisocyanate (BODI), hexamethylene diisocyanate (HDI), nonylcyclohexyl diisocyanate (HTDI) or dicyclohexyldecane diisocyanate (HMDI).
副溶液中游離之氰酸鹽官能基為3%〜29%。副溶液 與主溶液混合以進行發泡反應時，兩者之比例端視醇類預 聚物中游離氰酸鹽官能基之含量為主。根據本發明之一實 施方式’主溶液與副溶液以體積比1 : i〜1〇 : 1混合後’ 進行發泡反應。 根據本發明之一實施方式，主溶液中也可包含01〜03 %重量比之泡沫安定劑。當主溶液中之泡沫安定劑越多 時發/包所產生之泡沫密度越高。泡沫安定劑例如矽油。 人， 生物可分解性之兩液型發泡組成物中可包含填充 f、佳!!入填充劑可以提高生物可分解性之兩液型發泡組成 泡：應後’所生成之發泡體的强度和耐熱性能。 粉/為-氧切、雲母粉、碳酸約、木f粉或中空玻璃 體，由另—實施方式為提出—種生物可分解發泡 成。3生^可ί解之兩液型組成物經由發泡反應而 混合後，以== 解之兩液型組成物之主溶液與副溶液 以轉速為3_〜15_rpm之高速授拌機混合。 6 201035145 待攪拌均句後，倒入模具中，經60〜90°C烘箱乾燥熟成及 成型，即可產生聚乳酸與聚己内酯共構之發泡體。 上述之生物可分解發泡體適用於後續各種發泡產品之 製作。僅需將生物可分解之兩液型組成物倒入所需模具 中，即可依模具形狀製造各種不同之產品。例如：沙發椅 墊、鞋材等。 由上述本發明之實施方式可知，生物可分解之兩液型 組成物於混合前，主溶液與醇類預聚物在常溫下皆為液 體，易於保存，且必須將兩者混合後才會進行發泡反應。 此外，利用兩液型組成物，各成分也可先行混合均勻，以 避免各成分間因性質不同而產生混合不均之情形。換句話 說，主溶液中之各成分於發泡反應前即已先行混合，而副 溶液中之多元醇與異氰酸酯也可先行反應生成醇類預聚 物，兩溶液之反應於發泡反應前不會互相干擾。 雖然本發明已以實施方式揭露如上，然其並非用以限 定本發明，任何熟習此技藝者，在不脫離本發明之精神和 範圍内，當可作各種之更動與潤飾，因此本發明之保護範 圍當視後附之申請專利範圍所界定者為準。 【圖式簡單說明】 【主要元件符號說明】 無The free cyanate functional group in the secondary solution is from 3% to 29%. When the by-solution is mixed with the main solution to carry out the foaming reaction, the ratio of the two is mainly based on the content of the free cyanate functional group in the alcohol prepolymer. According to an embodiment of the present invention, the main solution and the sub-solution are mixed at a volume ratio of 1: i~1 〇 : 1 to carry out a foaming reaction. According to an embodiment of the present invention, the main solution may also contain a foam stabilizer of 01 to 03% by weight. The greater the foam stabilizer in the main solution, the higher the foam density produced by the hair/pack. A foam stabilizer such as eucalyptus oil. Human, biodegradable two-liquid foaming composition may contain filling f, good!! Filling agent can improve biodegradability of two-liquid foaming composition bubble: after the formation of the foam Strength and heat resistance. Powder/o-oxygen cut, mica powder, carbonic acid, wood f powder or hollow glass, which is proposed by another embodiment to be biodegradable and foamed. After the two liquid compositions are mixed by the foaming reaction, the main solution of the two liquid type composition of the == solution is mixed with the secondary solution at a high speed mixer of 3 to 15 rpm. 6 201035145 After stirring the sentence, pour it into the mold and dry it in an oven at 60~90 °C to form a foam of co-structured polylactic acid and polycaprolactone. The above biodegradable foam is suitable for the production of various foaming products. Simply by pouring the biodegradable two-component composition into the desired mold, you can make a variety of different products depending on the shape of the mold. For example: sofa cushions, shoe materials, etc. According to the embodiment of the present invention, the biodegradable two-liquid type composition is liquid at room temperature before being mixed, and is easy to store, and must be mixed after the two are mixed. Foaming reaction. In addition, by using the two-liquid type composition, the components can be uniformly mixed first, so as to avoid mixing unevenness due to different properties between the components. In other words, the components in the main solution are mixed before the foaming reaction, and the polyol and the isocyanate in the secondary solution can be reacted first to form an alcohol prepolymer. The reaction of the two solutions is not before the foaming reaction. Will interfere with each other. Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached. [Simple description of the diagram] [Explanation of main component symbols]