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Modified polyolefin resin and dispersion composition

A polyolefin resin, dispersion technology, applied in the directions of graft polymer adhesives, adhesive types, devices for coating liquids on surfaces, etc., and can solve problems such as coating or bonding of difficult polyolefin substrates , to achieve the effect of excellent water resistance and adhesion

Pending Publication Date: 2022-04-01
NIPPON PAPER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to coat or bond polyolefin substrates

Method used

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  • Modified polyolefin resin and dispersion composition
  • Modified polyolefin resin and dispersion composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] In a four-necked flask equipped with a stirrer, a cooling tube, and a dropping funnel, the propylene-1-butene copolymer (I) (the propylene component is 80 mol%, the 1-butene component is 20 mol%, Mw is 100,000, Tm is 85°C, tensile elastic modulus is 160MPa) and propylene-1-butene copolymer (II) (90 mol% of propylene component, 10 mol% of 1-butene component, Mw of 100,000, Tm 100° C., tensile modulus of 360 MPa) was heated and dissolved in 400 g of toluene at a weight ratio of 50:50 so as to make 100 parts in total. While stirring while keeping the temperature in the system at 110° C., 4.5 parts of maleic anhydride and 3.0 parts of di-tert-butyl peroxide were added dropwise over 3 hours. After further reacting for 1 hour after completion|finish of dripping, it cooled to room temperature. The reactant was poured into a large excess of acetone and purified to obtain a modified polyolefin resin (1) having a Mw of 100,000, a Tm of 90° C., and a graft weight of maleic anhydr...

Embodiment 2

[0122] Using a twin-screw extruder set at 200° C., 100 parts of propylene-1-butene copolymer (III) (90 mol % of propylene component, 10 mol % of 1-butene component, Mw of 400,000, Tm is 100° C., tensile elastic modulus is 360 MPa), 3.0 parts of maleic anhydride, and 2.0 parts of dilauroyl peroxide are mixed and reacted. Vacuum degassing was carried out in the extruder to remove remaining unreacted substances to obtain a modified polyolefin resin (2) having a Mw of 80,000, a Tm of 100° C., and a graft weight of maleic anhydride of 3.0% by weight.

[0123] In addition, using the obtained modified polyolefin resin (2), except that the addition amount of DMEA in Example 1 was set to 7 g, the aqueous dispersion composition (2) was prepared by the same method as in Example 1. . The Tm of the dried product of the aqueous dispersion composition (2) was 94°C.

Embodiment 3

[0125] Modified polyolefin resin (3) was obtained by the method similar to Example 2 except having changed the reaction temperature by the twin-screw extruder in Example 2 to 180 degreeC. The Mw of the obtained modified polyolefin resin (3) was 100,000, Tm was 100°C, and the graft weight of maleic anhydride was 3.0% by weight.

[0126] In addition, the aqueous dispersion composition was also prepared by the method similar to Example 2. The Tm of the dried product of the aqueous dispersion composition (3) was 95°C.

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Abstract

The purpose of the present invention is to provide a modified polyolefin resin with which it is possible to produce a coating film having excellent water-resistant adhesiveness under high-temperature conditions. Namely, the present invention provides a modified polyolefin resin which contains a graft-modified product obtained by graft-modifying a component (A), a polyolefin resin, with a component (B), an alpha, beta-unsaturated carboxylic acid or a derivative thereof, and which has a tensile modulus of at least 250 MPa and a weight-average molecular weight of at least 70,000 and less than 200,000.

Description

technical field [0001] The present invention relates to modified polyolefin resin and dispersion composition. More specifically, it relates to a modified polyolefin resin and a dispersion composition excellent in water adhesion resistance under high temperature conditions. Background technique [0002] Polyolefins such as polypropylene and polyethylene are generally inexpensive and have various excellent properties such as moldability, chemical resistance, water resistance, and electrical properties. Therefore, polyolefins have been widely used as materials for sheets, films, moldings, and the like in recent years. However, polyolefin substrates are nonpolar and crystalline substrates, unlike polar substrates such as polyurethane resins, polyamide resins, acrylic resins, and polyester resins. Therefore, it is difficult to coat or bond polyolefin substrates. [0003] As a method of improving the above-mentioned problems regarding adhesiveness, it has been proposed to under...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02C08F222/06C09D151/06C09D5/00C09J151/06C09D11/108
CPCC09J151/06C09D151/06C09D11/108C09D5/002B05D5/10C08F255/02C08F222/06C08L33/08C08F255/04C08F255/10
Inventor 小池谅榊原史泰关口俊司土井龙二
Owner NIPPON PAPER IND CO LTD
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