公开(公告)号：EP3064562A4

公开(公告)日：2017-10-11

申请号：EP14858335

申请日：2014-10-01

Applicant: NITTO DENKO CORP

Inventor： UKEI NATSUKI ,  NISHIMURA IZUMI ,  MATSUMOTO CHIE ,  OKADA MIKA

IPC: C09J133/08 ,  C09J7/02 ,  C09J11/06 ,  C09J133/02 ,  C09J133/10

CPC classification number: C09J7/0246 ,  C08K3/22 ,  C08K2003/2241 ,  C08L23/0815 ,  C09J7/22 ,  C09J7/243 ,  C09J7/38 ,  C09J123/12 ,  C09J133/08 ,  C09J2201/122 ,  C09J2201/606 ,  C09J2205/106 ,  C09J2423/006 ,  C09J2423/046 ,  C09J2423/106 ,  C09J2433/00 ,  C08F2220/1858 ,  C08F2220/1825 ,  C08F220/06 ,  C08F2216/1475

Abstract: Provided are a surface protection sheet with excellent weatherability, good anti-residue properties and low-contaminating properties and a water-dispersed PSA composition for surface protection sheets. The surface protection sheet provided by this invention comprises a PSA layer and a support substrate. The PSA layer is formed from a water-dispersed PSA composition comprising an acrylic polymer and a crosslinking- agent. The acrylic polymer is obtained by emulsion polymerization of a starting monomer mixture comprising 50 to 99.9 wt. % C 1-20 alkyl (meth)acrylate and 0.1 to 5 wt. % carboxy group-containing monomer. The crosslinking agent comprises one, two or more species selected from a group consisting of oxazoline-based crosslinking agents, isocyanate-based crosslinking agents and epoxy-based crosslinking agents. The support substrate comprises 50 % by weight or more polyolefin resin and 5 to 30 % by weight inorganic powder.

公开(公告)号：EP3064559A4

公开(公告)日：2017-07-05

申请号：EP14857747

申请日：2014-10-01

Applicant: NITTO DENKO CORP

Inventor： UKEI NATSUKI ,  NISHIMURA IZUMI ,  MATSUMOTO CHIE ,  OKADA MIKA ,  MARUOKA NOBUAKI

IPC: C09J7/02 ,  C09J11/06 ,  C09J133/00

CPC classification number: C09J7/0246 ,  C08K5/29 ,  C08K5/353 ,  C09J7/22 ,  C09J7/38 ,  C09J123/22 ,  C09J133/06 ,  C09J133/08 ,  C09J2201/606 ,  C09J2201/622 ,  C09J2203/306 ,  C09J2205/102 ,  C09J2423/00 ,  C09J2423/046 ,  C09J2423/106 ,  C09J2433/00

Abstract: This invention provides a surface protection sheet that allows for easy application to an adherend surface with good removability. The surface protection sheet provided by this invention comprises a PSA layer and a support substrate supporting the PSA layer. The surface protection sheet has a peel strength (S A ) after adhered to a stainless steel plate and stored at 23 °C for 30 minutes, and a peel strength (S B ) after adhered on a stainless steel plate and stored at 70 °C for 168 hours, at a peel strength ratio (S B /S A ) of 5 or less. The surface protection sheet has a peel strength to itself of 5 N/25mm or less when the PSA layer is adhered to itself and peeled apart after one minute.

Abstract translation: 本发明提供一种表面保护片，其允许以良好的可移除性容易地施加到被粘物表面。 本发明提供的表面保护片具有粘合剂层和支撑该粘合剂层的支撑基材。 表面保护片在附着于不锈钢板并在23℃下储存30分钟后具有剥离强度（SA），并且在粘附于不锈钢板上之后具有剥离强度（SB），并在70℃下储存168 小时，剥离强度比（SB / SA）为5或更小。 当粘合剂层粘合到其自身上并且在一分钟后剥离时，表面保护片具有5N / 25mm或更小的自身剥离强度。

公开(公告)号：EP2810998A4

公开(公告)日：2015-07-15

申请号：EP12867143

申请日：2012-12-05

Applicant: NITTO DENKO CORP

Inventor： MATSUMOTO CHIE ,  OKADA MIKA ,  NISHIMURA IZUMI

IPC: C09J7/02 ,  C09J133/04

CPC classification number: C09J133/04 ,  C08L33/04 ,  C08L2201/50 ,  C09J7/385 ,  C09J2433/00

Abstract: Provided is a surface protection film having a pressure-sensitive adhesive layer that is made from an aqueous dispersion-type pressure-sensitive adhesive and has both a sufficient level of adherability to adherends and a high level of removability. The surface protection film, comprising: a pressure-sensitive adhesive layer provided on one side of a backing film and made from an aqueous dispersion-type pressure-sensitive adhesive, wherein the pressure-sensitive adhesive comprises a polymer (A) comprising a monomer unit derived from a monomer composition (a2) containing an alkyl (meth)acrylate (a1); and another polymer (B) having a glass transition temperature higher than that of the polymer (A) and comprising a monomer unit derived from a monomer composition (b2) containing 75% by weight or more of an alkyl (meth) acrylate (b1), and the layer has a glass transition temperature peak detected at -20°C or less and a glass transition temperature peak detected at 30°C to 190°C.