Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1996-12-20
1998-03-17
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524531, 524533, 523407, C08L 5106
Patent
active
057287678
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to an aqueous resin composition, which can be used mainly for paint, primer, ink, adhesive, sealing agent or surface-processing agent. Moreover, since the resin composition of the invention can also be used in other aqueous resins and water-soluble resins such as aqueous acrylic and polyester depending on their uses, it can also be utilized as a modifier of film-forming materials.
Above all, since it can form a film and adhesive layer with excellent adhesion, flexibility and water resistance particularly on the polyolefin substrates etc. having nonpolar surface, it is useful as a resin for paint, primer, ink, sealing agent and adhesive applicable to car parts, etc., polyolefin film, polyolefinic moldings, etc. Moreover, it is applied also as a surface-processing agent or binder for fibrous and particle substrates.
So far, modified polyolefin compositions in which polyolefins such as polypropylene, polyethylene, copolymer of propylene or ethylene with .alpha.-olefin etc. are modified with unsaturated carboxylic acid or acid anhydride, and acid-modified chlorinated polyolefins in which they are further chlorinated have been used for painting materials, primer, ink, etc. In the present situation, however, these resins dissolve only into aromatic organic solvents such as toluene and xylene, hence they cannot help using large quantities of aromatic solvent, leading to the problems in the aspects of safety and hygiene and environmental pollution.
For this reason, in recent years, an aqueous resin wherein polyol, surfactant and basic substance are added to chlorinated polyolefin followed by aqueous conversion (U.S. Pat. No. 340845), an aqueous resin wherein chlorinated polyolefin modified with unsaturated carboxylic acid or acid anhydride is aqueous converted using surfactant and basic substance (Japanese Patent Application No. Hei 1-323506), etc. have been applied.
Attempts for producing aqueous dispersion of chlorinated polyolefin are disclosed in, for example, Japanese Unexamined Patent Publication Nos. Hei 1-153778, Hei 1-256556, Hei 2-284973, etc., but these use aromatic organic solvent at the time of production, thus making it difficult to completely eliminate organic solvent. Moreover, attempts for producing aqueous dispersion of modified polyolefin are also made and disclosed in, for example, Japanese Unexamined Patent Publication Nos. Sho 59-47244, Hei 2-286724, etc. However, if the material to be painted or to be adhered is polyolefin resin in the painting, adhesion, etc., then they have drawbacks of poor adhesion or water resistance, poor paintability, etc., hence such aqueous compositions have not still been put into practice. Moreover, in Japanese Unexamined Patent Publication No. Hei 3-182534, improved performance of coated film is undertaken by aqueous converting modified chlorinated polyolefin using surfactant and additionally by formulating aqueous polyurethane resin.
Because of nonreactive water-soluble urethane resin and surfactant, however, a phenomenon that the active agent components dissolve out from coated film by water and decrease the water resistance through the defect of coated film probably caused due to that took place.
Moreover, when forming a film using an aqueous converted chlorinated polyolefin resin aqueous converted using polyol and surfactant in large quantities, hydrophilic components such as polyol and surfactant are left behind in the film and they dissolve out by water, eading to a drawback of poor water resistance of film.
Furthermore, in an aqueous resin composition based on chlorinated polyolefin, large quantities of chlorinated resin component are contained, hence not only a problem arose in the weather resistance, but also a problem took place to no small extent in the disposal and the recycling treatment of end products with film or adhered layer formed.
Whereas, the applicant made applications on aqueous resins wherein polyolefin resin, chlorinated polyolefin resin and acid-modified polyolefin resin were aqu
REFERENCES:
patent: 4174335 (1979-11-01), Ohdaira
patent: 4806581 (1989-02-01), Walker
Abe Taro
Fujino Ken-ichi
Kanetou Noriyuki
Namba Hiroaki
Michl Paul R.
Nippon Paper Industries Co. Ltd.
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