SURFACE PROTECTION SHEET AND WATER DISPERSION TYPE ADHESIVE COMPOSITION FOR SURFACE PROTECTION SHEET

• Main Authors: UKEI NATSUKI, NISHIMURA IZUMI, MATSUMOTO CHIE, OKADA MIYOSHI
• Format: Patent
• Language: English; Japanese
• Published: 18.06.2020
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; DYES; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; PAINTS; PERFORMING OPERATIONS; POLISHES; TRANSPORTING; USE OF MATERIALS AS ADHESIVES

To provide a surface protection sheet excellent in weatherproofness and exhibiting excellent non-adhesive residue property and a low stain property, and a water dispersion type adhesive composition for the surface protection sheet.SOLUTION: A surface protection sheet includes an adhesive layer and a support substrate. The adhesive layer is composed of a water dispersion type adhesive composition including: an acrylic polymer obtained through emulsion polymerization of a monomer raw material containing 50-99.9 wt.% of a Calkyl (meth)acrylate and 0.1-5 wt.% of carboxyl group-containing monomer; and a cross-linking agent. The cross-linking agent includes one or two kinds selected from a group composed of an oxazoline-based cross-linking agent, an isocyanate-based cross-linking agent and an epoxy-based cross-linking agent. The supplying substrate includes 50 wt.% or more of polyolefin resin and 5-30 wt.% of inorganic powder.SELECTED DRAWING: Figure 1 【課題】耐候性に優れ、良好な非糊残り性および低汚染性を示す表面保護シートと、該表面保護シート用の水分散型粘着剤組成物とを提供する。【解決手段】本発明により提供される表面保護シートは、粘着剤層と支持基材とを含む。その粘着剤層は、Ｃ１−２０アルキル（メタ）アクリレート５０〜９９．９重量％およびカルボキシル基含有モノマー０．１〜５重量％を含むモノマー原料をエマルション重合させて得られたアクリル系ポリマーと、架橋剤と、を含む水分散型粘着剤組成物から形成されている。上記架橋剤は、オキサゾリン系架橋剤、イソシアネート系架橋剤およびエポキシ系架橋剤からなる群から選択される１種または２種以上を含む。上記支持基材は、ポリオレフィン樹脂を５０重量％以上含み、さらに無機粉末を５〜３０重量％含む。【選択図】図１