Polyester pressure-sensitive adhesive composition, polyester pressure-sensitive adhesive, pressure-sensitive adhesive sheet and optical member with pressure-sensitive adhesive layer
US-2020216720-A1 · Jul 9, 2020 · US
Adhesive tape
US12065596B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12065596-B2 |
| Application number | US-202117182649-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 23, 2021 |
| Priority date | Sep 5, 2018 |
| Publication date | Aug 20, 2024 |
| Grant date | Aug 20, 2024 |
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- Title
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Abstract
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An adhesive tape includes a substrate [I] and an adhesive agent layer of a polyester adhesive agent provided on at least one of opposite surfaces of the substrate [I]. The substrate [I] is one selected from a polyolefin resin foam substrate, a urethane resin foam substrate, and an acrylic resin foam substrate. The polyester adhesive agent is made from a polyester adhesive agent composition [II] which contains a polyester resin (A) having a weight average molecular weight of 5,000 to 300,000, and having a structural unit derived from a polyol and a structural unit derived from a polyvalent carboxylic acid compound containing an aromatic structure-containing compound in a proportion of not greater than 80 mol %. The adhesive tape is excellent in adherence between a polyester adhesive agent layer and a polyolefin resin foam substrate, a urethane resin foam substrate, or an acrylic resin foam substrate.
First claim
Opening claim text (preview).
The invention claimed is: 1. An adhesive tape comprising: a substrate [I]; and an adhesive agent layer of a polyester adhesive agent provided on at least one of opposite surfaces of the substrate [I]; wherein the substrate [I] is one selected from the group consisting of a polyolefin resin foam substrate, a urethane resin foam substrate, and an acrylic resin foam substrate; wherein the polyolefin resin foam substrate has an apparent density of 10 to 200 kg/m 3 ; wherein the urethane resin foam substrate and the acrylic resin foam substrate have an apparent density of 200 to 1000 kg/m 3 ; wherein the polyester adhesive agent is made from a polyester adhesive agent composition [II] which comprises a polyester resin (A) having a weight average molecular weight of 20,000 to 300,000, and having a structural unit derived from a polyol and a structural unit derived from a polyvalent carboxylic acid compound containing an aromatic structure-containing compound in a proportion of not greater than 40 mol % of the polyvalent carboxylic acid compound; wherein the polyester resin (A) has a structural unit derived from a hydrogenated polybutadiene structure-containing compound (a3); wherein the structural unit derived from the hydrogenated polybutadiene structure-containing compound (a3) is present in a proportion of less than 10 wt. % with respect to 100 wt. % of the polyester resin (A), wherein the polyester resin (A) has an acid value of not greater than 3 mg KOH/g, and wherein the polyester resin (A) has an ester bond concentration of 7 to 9.5 mmol/g. 2. The adhesive tape according to claim 1 , wherein the substrate [I] is the polyolefin resin foam substrate. 3. The adhesive tape according to claim 1 , wherein the substrate [I] is selected from the urethane resin foam substrate and the acrylic resin foam substrate. 4. The adhesive tape according to claim 1 , wherein the polyester adhesive agent composition [II] further comprises a hydrolysis inhibitor. 5. The adhesive tape according to claim 1 , wherein the substrate [I] has a thickness of 0.1 to 2 mm.
Assignees
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Classifications
in the barrier layer · CPC title
Presence of polyester · CPC title
in the barrier layer · CPC title
in the barrier layer · CPC title
in the barrier layer · CPC title
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Frequently asked questions
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- What does patent US12065596B2 cover?
- An adhesive tape includes a substrate [I] and an adhesive agent layer of a polyester adhesive agent provided on at least one of opposite surfaces of the substrate [I]. The substrate [I] is one selected from a polyolefin resin foam substrate, a urethane resin foam substrate, and an acrylic resin foam substrate. The polyester adhesive agent is made from a polyester adhesive agent composition [II]…
- Who is the assignee on this patent?
- Mitsubishi Chem Corp
- What technology area does this patent fall under?
- Primary CPC classification C09J7/30. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 20 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).