Hot melt adhesives and uses thereof
US-2024228837-A1 · Jul 11, 2024 · US
Base polymer for hot melt adhesive
US2018265752A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018265752-A1 |
| Application number | US-201515537142-A |
| Country | US |
| Kind code | A1 |
| Filing date | Dec 22, 2015 |
| Priority date | Dec 22, 2014 |
| Publication date | Sep 20, 2018 |
| Grant date | — |
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- Title
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Abstract
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A base polymer for hot-melt adhesive, containing a propylenic polymer (A) having a tensile modulus of elasticity of 60 MPa or more, and an olefinic polymer (B) having a tensile modulus of elasticity of less than 60 MPa, wherein, relative to 100 parts by mass of the total amount of the propylenic polymer (A) and the olefinic polymer (B), the content of the propylenic polymer (A) is 1 part by mass or more and less than 50 parts by mass, and the content of the olefinic polymer (B) is more than 50 parts by mass and 99 parts by mass or less; and a hot-melt adhesive containing the base polymer, and further containing at least one of (C) a tackifier resin and (D) an oil.
First claim
Opening claim text (preview).
1 . A base polymer for hot-melt adhesive, comprising: a propylenic polymer (A) having a tensile modulus of elasticity at 23° C. of 60 MPa or more, and an olefinic polymer (B) having a tensile modulus of elasticity at 23° C. of less than 60 MPa, wherein: relative to 100 parts by mass of the total amount of the propylenic polymer (A) and the olefinic polymer (B), the content of the propylenic polymer (A) is 1 part by mass or more and less than 50 parts by mass, and the content of the olefinic polymer (B) is more than 50 parts by mass and 99 parts by mass or less. 2 . The base polymer for hot-melt adhesive according to claim 1 , wherein the content of the propylenic polymer (A) is 1 part by mass or more and 40 parts by mass or less, and the content of the olefinic polymer (B) is 60 parts by mass or more and 99 parts by mass or less. 3 . The base polymer for hot-melt adhesive according to claim 1 , wherein the propylenic polymer (A) is a propylene homopolymer. 4 . The base polymer for hot-melt adhesive according to claim 1 , wherein the tensile modulus of elasticity at 23° C. of the propylenic polymer (A) is 90 MPa or more. 5 . The base polymer for hot-melt adhesive according to claim 1 , wherein the olefinic polymer (B) is an olefin copolymer or an olefin homopolymer. 6 . The base polymer for hot-melt adhesive according to claim 1 , wherein the olefinic polymer (B) is a copolymer of at least two selected from the group consisting of propylene, ethylene and α-olefins each having 4 to 24 carbon atoms, a propylene homopolymer, or an ethylene homopolymer. 7 . The base polymer for hot-melt adhesive according to claim 1 , wherein the olefinic polymer (B) is a copolymer of propylene, ethylene and 1-butene. 8 . The base polymer for hot-melt adhesive according to claim 1 , wherein the propylenic polymer (A) has a melting point of 120° C. or lower. 9 . The base polymer for hot-melt adhesive according to claim 1 , wherein the olefinic polymer (B) has a melting point of 50° C. or higher and 160° C. or lower. 10 . A hot-melt adhesive, comprising: a base polymer for hot-melt adhesive according to claim 1 ; and at least one selected from the group consisting of (C) a tackifier resin and (D) an oil. 11 . The hot-melt adhesive according to claim 10 , which satisfies the following (1) and (2): (1) the tensile modulus of elasticity at 23° C. of the base polymer is 400 MPa or less; and (2) the semi-crystallization time at 25° C. of the hot-melt adhesive is 5 minutes or less. 12 . A method of bonding a substrate to another substrate, the method comprising melting a hot-melt adhesive according to claim 10 , and applying the melted hot-melt adhesive to at least one substrate; and bonding another substrate to the applied hot-melt adhesive. 13 . A sanitary article, comprising a hot-melt adhesive according to claim 10 .
Assignees
Inventors
Classifications
having four to nine carbon atoms · CPC title
Polypropene · CPC title
specially adapted for female use · CPC title
Features of adhesives not provided for in group C09J9/00, e.g. additives · CPC title
Homopolymers or copolymers of ethene · CPC title
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- What does patent US2018265752A1 cover?
- A base polymer for hot-melt adhesive, containing a propylenic polymer (A) having a tensile modulus of elasticity of 60 MPa or more, and an olefinic polymer (B) having a tensile modulus of elasticity of less than 60 MPa, wherein, relative to 100 parts by mass of the total amount of the propylenic polymer (A) and the olefinic polymer (B), the content of the propylenic polymer (A) is 1 part by mas…
- Who is the assignee on this patent?
- Idemitsu Kosan Co
- What technology area does this patent fall under?
- Primary CPC classification C09J123/14. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Sep 20 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).