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Polymer composition and pressure sensitive adhesives or films made therefrom

A polymer and composition technology, applied in the application fields of polymer compositions containing vinyl aromatic copolymers, pressure-sensitive adhesives and films

Active Publication Date: 2021-05-11
TSRC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these materials still have various shortcomings

Method used

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  • Polymer composition and pressure sensitive adhesives or films made therefrom
  • Polymer composition and pressure sensitive adhesives or films made therefrom
  • Polymer composition and pressure sensitive adhesives or films made therefrom

Examples

Experimental program
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example 1

[0050] The polymer composition of Example 1: polymer P 80% by weight and tackifier Tackifer R1125 20% by weight. Put the polymer composition into a twin-screw extruder to knead and granulate at 160°C-220°C. The granulated material is hot-pressed into a film in a molding machine. The processing conditions are: temperature 200°C, preheating for three minutes to exhaust twice, and actual hot-pressing for four minutes. The film was cut into standard test pieces with release paper and tested for various properties. The results are shown in Table 2.

[0051] The methods of the films of examples 2 to 14 and comparative examples 1 to 11 of the present invention are the same as example 1 except that the polymer composition thereof is different from example 1. The properties of the polymer compositions and the formed films of Examples 2 to 14 and Comparative Examples 1 to 11 can be referred to Tables 2 to 8.

[0052] Table II

[0053]

[0054] Table 2 shows the polymer composition...

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Abstract

The present invention relates to a polymer composition and pressure sensitive adhesives or films made therefrom. Specifically, the invention provides a polymer composition for pressure sensitive adhesives or films thereo. The polymer composition comprises 20-40 parts by weight of a tackifier; and 60-80 parts by weight of a polymer, wherein the polymer and the tackifier are 100 parts by weight. The polymer comprises at least a first vinyl aromatic based copolymer formed by polymerization of vinyl aromatic monomer and conjugated diene monomer, wherein a vinyl aromatic monomer content of the first vinyl aromatic based copolymer is 16wt%~28wt%, a vinyl structure content of a conjugated diene monomer content in the first vinyl aromatic based copolymer is 32wt%~50wt%; and a melt flow index (MFI) of the first vinyl aromatic based copolymer is 20 g / 10 min-60 g / 10 min (230 DEG C, 2.16 kg). The present invention also provides the pressure sensitive adhesives or films made from the polymer composition.

Description

technical field [0001] The present invention relates to a polymer composition, in particular to the polymer composition containing vinyl aromatic copolymer and its application in pressure-sensitive adhesive and film. Background technique [0002] Films, especially protective films, consist of a substrate layer and an adhesive layer. Most of the current protective films are made by melt adhesive co-extrusion method (or hot-melt co-extrusion method) or solution coating method. The composition of the solution coating method is mostly rubber-based, and the use of a large amount of solvents in its manufacturing process has been gradually banned by governments of various countries. Therefore, it has become a common research and development goal of the industry to find a protective film that has rubber characteristics and a medium and high initial viscosity (Tack) and can be produced by co-extrusion of melt adhesives at the same time. US 6,465,557 discloses a hot-melt pressure-se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J153/02C09J11/08C09J7/10C09J7/38
CPCC08L53/025C08L23/12D01F6/42D01F8/10D01F8/06D04H1/541D04H1/56D04H3/147C08L2207/10C08L23/0815C09J153/025C08F297/04C08F8/04C08L2203/12C08L23/10C09J7/387C09J7/243C09J109/06C08L53/02C09J2423/00C09J2301/302C09J2409/00C09J2425/00C09J2453/00C09J2301/408C09J2301/312C09J7/20C09J125/10C08K2201/019
Inventor 施希弦蔡文彬杨丰瑜徐泰易丁晴
Owner TSRC CORP