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Primer composition and adhesive substrate

A technology of composition and primer, applied in the direction of primer, graft polymer adhesive, adhesive, etc., to achieve the effect of high adhesion and excellent heat resistance

Inactive Publication Date: 2009-11-25
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the use of chlorine-based materials has recently been avoided due to environmental concerns, and this is not an exception in the field of primers

Method used

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  • Primer composition and adhesive substrate
  • Primer composition and adhesive substrate
  • Primer composition and adhesive substrate

Examples

Experimental program
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Effect test

preparation example 1

[0064] Preparation of Maleic Acid Modified Polyolefin :

[0065] In a four-necked flask equipped with a stirrer, a condenser tube, a thermometer, and a dropping funnel, 300 g of a polypropylene-butylene-ethylene copolymer (number average molecular weight: 68,000) was dissolved in 700 g of toluene under heating. While maintaining the obtained solution at a temperature of 115° C., 13 g of maleic anhydride and 12 g of di-tert-butyl peroxide were successively added dropwise under stirring over 2 hours. After the dropwise addition was complete, maturation was carried out for 3 hours to allow the grafting reaction to proceed. Subsequently, the reaction product was cooled to room temperature and then 20 liters (L) of acetone was injected. The maleic acid-modified target polyolefin (hereinafter referred to as "MMPO") was obtained in about 90% yield.

example 1

[0067] A 1:1 mixture of methylcyclohexane and ethyl acetate was added to the maleic acid-modified polyolefin (MMPO) prepared in Preparation Example 1 to prepare an MMPO solution having a solid content of 5%. Subsequently, 5% by weight (based on the total amount of maleic acid-modified polyolefin) of polyether diamine (number average molecular weight: about 800) was added to the MMPO solution, as shown in Table 1 below, and the resulting solution was heated at room temperature Stir for 1 hour. A primer solution comprising MMPO and an organic diamine is obtained.

[0068] Examples 2 to 6

[0069] The procedure of Example 1 was repeated, but as shown in Table 1 below, the amount of polyetherdiamine added was varied in Examples 2 to 4, and the commercial product Jeffamine D230 or D400 was used as the organic diamine in Examples 5 and 6 . Similar to Example 1, various primer solutions comprising MMPO and organic diamines were obtained.

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Abstract

To provide a primer for imparting high adhesive property and high heat resistance to the surface of a substrate. The primer composition is constructed to comprise (1) a maleic acid-modified polyolefm, (2) an organic diamine having a number average molecular weight of at least 150, and (3) a solvent.

Description

technical field [0001] The present invention relates to primer compositions. More particularly, the present invention relates to primer compositions capable of imparting good adhesion and heat resistance to, inter alia, polyolefin-based substrates and synthetic resin substrate surfaces treated with such primer compositions. Background technique [0002] Conventionally, it is known that so-called polyolefin-based materials such as polypropylene exhibit extremely poor adhesiveness among a large number of synthetic resin materials, and it is difficult to bond other members to parts, members including polyolefin-based materials , products, etc. (hereinafter collectively referred to as "substrate"). Over the years, various methods have been employed to overcome this difficulty, and the general method is to apply an appropriate primer to the substrate and thereby modify the chemical properties of the surface. [0003] For primers for polyolefins, chlorinated polypropylene is wel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D123/00C09D133/00C09D7/12
CPCC09J123/0869C09J151/06C08L51/06C09D5/002C09D151/06C08L2666/02Y10T428/2843C09D123/00C09D133/00
Inventor 石田根吉
Owner 3M INNOVATIVE PROPERTIES CO