Resin composition, pellet, veil, damping material, sound insulation material, and intermediate film for laminated glass

Patent metadata

Field	Value
Publication number	US-10913843-B2
Application number	US-201716336369-A
Country	US
Kind code	B2
Filing date	Sep 26, 2017
Priority date	Sep 27, 2016
Publication date	Feb 9, 2021
Grant date	Feb 9, 2021

Abstract

Provided are a resin composition, a pellet, a veil, a vibration damping material, a sound insulator, and an intermediate film for laminated glass, each of which is much more excellent in damping properties. Specifically, the resin composition is a resin composition containing the following block copolymer or hydrogenation product thereof (X); and a tackifier resin (Y) having a glass transition temperature of −50 to 45° C., wherein when a glass transition temperature of a polymer block (B) of the block copolymer or hydrogenation product thereof (X) is designated as Tg(X), and a glass transition temperature of the tackifier resin (Y) is designated as Tg(Y), an absolute value of a difference between Tg(X) and Tg(Y) is 50° C. or lower,
the block copolymer or hydrogenation product thereof (X) being a block copolymer or a hydrogenation product thereof having a polymer block (A) containing more than 70 mol % of a structural unit derived from an aromatic vinyl compound and a polymer block (B) containing 30 mol % or more of a structural unit derived from at least one selected from the group consisting of a conjugated diene compound and isobutylene, and the content of the polymer block (A) in the block copolymer being 25% by mass or less.

First claim

The invention claimed is:

1. A resin composition comprising a block copolymer or hydrogenation product thereof (X); and a tackifier resin (Y) having a glass transition temperature of −50 to 45° C.,
wherein, when a glass transition temperature of a polymer block (B) of the block copolymer or hydrogenation product thereof (X) is designated as Tg(X), and a glass transition temperature of the tackifier resin (Y) is designated as Tg(Y), an absolute value of a difference between Tg(X) and Tg(Y) is 50° C. or lower,
wherein the block copolymer or hydrogenation product thereof (X) is: a block copolymer or a hydrogenation product thereof having a polymer block (A) comprising more than 70 mol % of a structural unit derived from an aromatic vinyl compound and a polymer block (B) comprising 30 mol % or more of a structural unit derived from at least one selected from the group consisting of a conjugated diene compound and isobutylene, wherein the content of the polymer block (A) in the block copolymer is 25% by mass or less.

2. The resin composition according to claim 1 , wherein a molecular weight of the tackifier resin (Y) is from 100 to 10,000.

3. The resin composition according to claim 1 , wherein the tackifier resin (Y) has an alicyclic skeleton.

4. The resin composition a according to claim 1 , wherein the tackifier resin (Y) comprises an oxygen atom.

5. The resin composition according to claim 1 , wherein an acid value of the tackifier resin (Y) is 100 mgKOH/g or less.

6. The resin composition according to claim 1 , wherein the tackifier resin (Y) is at least one selected from the group consisting of a rosin-based resin, a phenol-based resin, and a coumarone-indene-based resin.

7. The resin composition according to claim 6 , wherein the rosin-based resin is a hydrogenated or non-hydrogenated rosin ester.

8. The resin composition according to claim 1 , wherein the tackifier resin (Y) is liquid at 25° C.

9. The resin composition according to claim 1 , wherein a weight average molecular weight of the block copolymer or hydrogenation product thereof (X) is from 20,000 to 800,000.

10. The resin composition according to claim 1 , wherein in the hydrogenation product, a hydrogenation rate of the polymer block (B) is from 80 to 99 mol %.

11. The resin composition according to claim 1 , wherein in the block copolymer or hydrogenation product thereof (X), the conjugated diene compound is isoprene, butadiene, or a mixture of isoprene and butadiene.

12. The resin composition according to claim 1 , wherein the content of the polymer block (A) in the block copolymer is from 1 to 15% by mass.

13. The resin composition according to claim 1 , wherein a content proportion of the component (X) and the component (Y) [X/Y] is from 90/10 to 10/90 in terms of a mass ratio.

14. The resin composition according to claim 1 , wherein a morphology of a film having a thickness of 1 mm, which is obtained by molding the block copolymer or hydrogenation product thereof (X) according to the following molding condition, has a microphase-separated structure of a sphere:
Molding condition: to apply a pressure at a temperature of 200° C. under a pressure of 10 MPa for 3 minutes.

15. The resin composition according to claim 1 , wherein a morphology of a film having a thickness of 1 mm, which is obtained by molding the resin composition according to the following molding condition, has a microphase-separated structure of a sphere:
Molding condition: to apply a pressure at a temperature of 200° C. under a pressure of 10 MPa for 3 minutes.

16. The resin composition according to claim 1 , wherein a ratio of a storage modulus G′ (−5) at ((peak top temperature of tan δ)−5° C.) of the resin composition to a storage modulus G′ (top) at the peak top temperature [G′ (−5)/G′ (top)] is 10 or more.

17. The resin composition according to claim 1 , wherein a peak intensity of tan δ, which is measured under a condition at a strain amount of 0.1%, a frequency of 1 Hz, a measurement temperature of −70 to 200° C., and a temperature rise rate of 3° C./min in conformity with JIS K7244-10 (2005), is 2.5 or more.

18. A pellet or a veil comprising the resin composition according to claim 1 .

19. A vibration damping material, a sound insulator or an intermediate film, comprising the resin composition according to claim 1 .

Assignees

• Kuraray Co

Inventors

• Senda Yasushi
• Oshita Shinya
• Asanuma Yoshiaki

Classifications

• C08L45/02

  of coumarone-indene polymers · CPC title

• C08L53/02 Primary

  of vinyl-aromatic monomers and conjugated dienes · CPC title

• C08L67/08

  Polyesters modified with higher fatty oils or their acids, or with resins or resin acids · CPC title

• C08L101/12

  characterised by physical features, e.g. anisotropy, viscosity or electrical conductivity (liquid crystal materials or compositions C09K19/00) · CPC title

• B32B2307/56

  Damping, energy absorption · CPC title