JPS6340404B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an anti-mildew material, and more particularly to a material which itself has anti-mildew properties without the need for separately incorporating an anti-mildew agent. Most materials such as paper, wood, rubber, plastic, and metal are susceptible to mold attack under certain environments. For this reason, fungicides such as phenols or their chlorine compounds, metal salts of organic acids such as naphthenic acid, and quaternary ammonium compounds are added to these materials, or the materials are coated with substances containing fungicides. In particular, anti-mildew measures are taken. Furthermore, anti-mildew properties are maintained by using antibiotics with strong anti-mildew properties. However, depending on the purpose of use of the materials, it may be difficult to achieve sufficient effects with the above-mentioned anti-mold measures, such as underground steel pipes for water supply, insulating materials for electrical and electronic equipment, and sealing of printed wiring boards. Preventing problems caused by the growth of mold is an urgent issue when it comes to retaining materials and the like. Therefore, the present inventors used the above-mentioned fungicide,
As a result of repeated studies to develop a material that itself has anti-mildew properties without adding anti-fungal substances, we discovered that a material with a specific composition has excellent anti-mildew properties. The present invention was completed based on this knowledge. The present invention relates to a liquid diene polymer containing a terminal hydroxyl group, a carbodiimide modified product of 4,4'-diphenylmethane diisocyanate, and an aniline polyol represented by the following formula. (wherein R represents a lower alkylene group). The diene polymers containing terminal hydroxyl groups used in the present invention include polymers and copolymers of diolefins having 4 to 12 carbon atoms, as well as diolefins having 4 to 12 carbon atoms and α-olefins having 2 to 22 carbon atoms. Examples include copolymers of addition-polymerizable monomers (preferably 75% by weight or less). Specific examples include polybutadiene, polyisoprene, polychloroprene, butadiene-isoprene copolymer, butadiene-acrylonitrile copolymer, butadiene-styrene copolymer, butadiene-2-ethylhexyl acrylate copolymer, and butadiene-n-octadecyl acrylate copolymer. These can be obtained by known methods, including reacting diene monomers with hydrogen peroxide. This terminal hydroxyl group-containing diene polymer preferably has a number average molecular weight of 500 to 10,000. In addition, as an aniline polyol, the following formula (Here, R represents a lower alkylene group.) There is a compound represented by the following. As a specific compound,
For example, the following can be given:

【formula】

[Formula] Regarding the blending ratio of each component in the anti-mildew material of the present invention, the liquid diene polymer containing terminal hydroxyl groups
Appropriate amounts per 100 parts by weight are 10 to 60 parts by weight of the carbodiimide-modified 4,4'-diphenylmethane diisocyanate and 5 to 30 parts by weight of the aniline polyol. Here, if the amount of the carbodiimide modified product of 4,4'-diphenylmethane diisocyanate is less than 10 parts by weight, sufficient strength cannot be obtained, while if it is more than 60 parts by weight, it will not harden. Furthermore, if the amount of aniline polyol is less than 5 parts by weight, sufficient strength cannot be obtained, and if it is more than 30 parts by weight, it becomes too hard, which is not preferable. Other components, such as anti-aging agents, plasticizers, fillers, colorants, reinforcing materials, etc., can be appropriately blended into the anti-mildew material of the present invention, if necessary. The anti-mildew material of the present invention can be used as a cured molded product for electrical and
It is used as an insulating material for electronic equipment, a sealing material for printed wiring boards, etc. It can also be used as a coating material for steel pipes, resin pipes, etc., and can be used as a plasticizer, waterproofing agent, coating agent, etc., and has excellent mildew resistance. exerts its effect. Next, a test piece specified in JIS Z2911×1976 and ASTM G21-75 was prepared from the anti-mold material of the present invention having the following composition, and mold spores were inoculated into the test piece according to each test method. The cells were cultured for several months and their resistance to mold was evaluated. The results are shown in Table 1. Sample A: Liquid polybutadiene containing terminal hydroxyl groups (number average molecular weight 2800) 100 parts by weight 4,4'-diphenylmethane diisocyanate modified with carbodiimide 38 parts by weight Aniline polyol (compound of formula)
17 parts by weight Sample B: Liquid polybutadiene containing terminal hydroxyl groups (number average molecular weight 2800) 100 parts by weight 4,4'-diphenylmethane diisocyanate modified with carbodiimide 12 parts by weight Sample C: Oxycarbonylpentamethylene polymer (number average molecular weight 850) ) 100 parts by weight Carbodiimide modified product of 4,4'-diphenylmethane diisocyanate 54 parts by weight

【table】

[Table] As is clear from the table, mold did not grow on test piece A prepared from the anti-mold material of the present invention, and it was confirmed that the test piece A had high resistance to mold.

Claims (1)

[Scope of Claims] 1. Liquid diene polymer containing terminal hydroxyl group, 4.
Carbodiimide modified product of 4′-diphenylmethane diisocyanate and aniline polyol represented by the following formula (wherein R represents a lower alkylene group). 2. A patent claim consisting of 10 to 60 parts by weight of a carbodiimide modified 4,4'-diphenylmethane diisocyanate and 5 to 30 parts by weight of an aniline polyol to 100 parts by weight of a liquid diene polymer containing a terminal hydroxyl group. The anti-mildew material according to scope 1.