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Modified polyolefin resin

A polyolefin resin, modification technology, applied in the field of modified polyolefin resin, can solve the problem of solution stability reduction

Pending Publication Date: 2020-08-28
NIPPON PAPER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the technique described in Patent Document 1, although heat resistance is improved by containing a high-melting point resin, solution stability may decrease

Method used

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  • Modified polyolefin resin
  • Modified polyolefin resin

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preparation example Construction

[0088] The preparation method of the modified polyolefin resin of the present invention is not particularly limited. An example is shown below.

[0089] First, polyolefin resin is prepared. Polyolefin resin can be obtained by adding α-olefins such as ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene to Ziegler-Natta catalyst or metallocene catalyst Prepared by polymerization in the presence of a catalyst. A commercial item can also be used for a polyolefin resin.

[0090] Next, the polyolefin resin is modified with a modifying component. The modification method can be performed by a known method, for example, a graft polymerization method. During graft polymerization, free radical initiators can also be used. As a method for obtaining a modified polyolefin resin, there may be mentioned: a solution method in which a modified component is heated and dissolved in a solvent such as toluene, and a radical initiator is added; Melt kneading method in which...

Embodiment 1

[0134]In a four-necked flask equipped with a stirrer, a cooling tube, and a dropping funnel, 100 parts of propylene-butene random copolymer [P-B] (80 mol% propylene component, 20 mol% butene component, Tm =85°C) was heated and dissolved in 400g of toluene. The temperature in the system was kept at 110°C, and while stirring, 4.5 parts of maleic anhydride, 4.0 parts of dodecyl methacrylate, and 1.0 parts of di-tert-butyl peroxide were added dropwise for 3 hours, and then The reaction was carried out for 1 hour.

[0135] After completion of the reaction, it was cooled to room temperature to obtain a reactant having a weight average molecular weight of 160,000 and Tm=82°C. The reactant was purified by pouring into a large excess of acetone, and the graft weights of maleic anhydride and lauryl methacrylate were measured and found to be 4.0% by weight and 3.0% by weight, respectively.

[0136] The reactant was left to stand at constant temperature and humidity (50° C., 100% RH) fo...

Embodiment 2

[0138] Except being 2.0 parts of maleic anhydride, 2.0 parts of lauryl methacrylate, and 0.8 parts of di-tert-butyl peroxide, the reaction was carried out in the same manner as in Example 1 to obtain a molecular weight of 150,000 and Tm=83 °C, the grafted amounts of maleic anhydride and lauryl acrylate were 1.9% by weight and 1.8% by weight of reactants, respectively.

[0139] The reactant was left to stand at constant temperature and humidity (50° C., 100% RH) for 16 hours to obtain a modified polyolefin resin with a ring opening rate of 54.3%, that is, a ring opening degree of 103.2.

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Abstract

The present invention addresses the problem of providing a modified polyolefin resin which is capable of achieving a desired adhesive power regardless of the kind of the base resin even if graft modification is performed with use of an alpha, beta-unsaturated carboxylic acid derivative having a ring structure; and the present invention provides a modified polyolefin resin which is a modified product of a polyolefin resin, and which satisfies the conditions (A) and (B) described below. Condition (A): The modification component contains an alpha, beta -unsaturated carboxylic acid derivative thathas a ring structure. Condition (B): The degree of ring opening expressed by formula (1) is 40 or more. (1): (Degree of ring opening) = (Degree of modification K) x (Ring opening rate R) (In formula(1), the degree of modification K represents the graft weight (% by weight) of the alpha, beta -unsaturated carboxylic acid derivative; and the ring opening rate R represents the ring opening rate (%)of the ring structure of the alpha, beta -unsaturated carboxylic acid derivative.).

Description

technical field [0001] The present invention relates to modified polyolefin resins. Background technique [0002] Polyolefin resins such as polypropylene and polyethylene are excellent in mechanical properties such as tensile strength, tear strength, and impact strength, as well as water resistance and chemical resistance. In addition, polyolefin resins have various excellent properties such as light weight, low cost, and good moldability. Therefore, polyolefin resins are used in various applications such as sheets, films, and moldings. However, unlike acrylic resins and polyester resins, since they are non-polar and have good crystallinity, they have a disadvantage of being difficult to coat and adhere. [0003] Chlorinated polyolefin resins are widely used as polyolefin resins having improved adhesion to nonpolar resin substrates. However, since chlorinated polyolefin resins have a problem of dehydrochlorination, they are considered unsuitable for bonding polyolefin res...

Claims

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Application Information

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IPC IPC(8): C08F255/00
CPCC08F255/00C08F222/06
Inventor 小野勇近藤圭木村浩司竹中天斗名原悠子关口俊司
Owner NIPPON PAPER IND CO LTD
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