JPS6360051B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a waterproofing material for construction, and more particularly to a waterproofing material for construction made by crosslinking a diene-based liquid polymer containing petroleum resin. In recent years, liquid polymers have been attracting attention as they have been developed for use in various products such as adhesives, paints, sealants, and waterproofing materials in the field of building materials. However, with regard to liquid polymers, their crosslinking reactivity and the reinforcing effect of fillers have not been sufficiently elucidated. Up to now, reinforcing liquid polymers using fillers such as carbon black and hydrated silicic acid have been developed and are being put into practical use as reinforcing agents. In addition, in order to obtain a sufficient reinforcing effect, it is necessary to use a special mixer such as a three-roll (paint mill) to uniformly disperse the liquid polymer, so the viscosity of the compound must be adjusted. It has the disadvantage of significantly increasing the amount of steel and reducing workability. Furthermore, although processability is improved by adding plasticizers, oils, asphalt, etc., it is not possible to obtain liquid polymers with sufficiently satisfactory physical properties. In view of the current state of liquid polymers, the present inventors have conducted extensive research, particularly regarding improving the physical properties of crosslinked products, and have found that a composition in which a liquid polymer is mixed with a certain type of petroleum resin as a reinforcing agent has been developed after crosslinking. The present invention was completed based on the discovery that it is possible to provide a waterproofing material for construction that maintains high physical properties and has excellent alkali resistance and heat resistance. That is, the gist of the present invention resides in a waterproofing material for construction in which a liquid polymer composition containing a diene liquid polymer having reactive active hydrogen and a petroleum resin is crosslinked. The liquid polymer used in the present invention is a polymer that has fluidity at room temperature, forms a three-dimensional network structure through crosslinking treatment, and exhibits physical properties similar to other crosslinked polymers. Preferred liquid polymers include:
Polybutadiene, polyisoprene, polychloroprene, butadiene/with an average molecular weight of 500 to 10,000, which has functional groups capable of forming crosslinks such as hydroxyl, carboxy, mercapto, and amino groups at both ends of the molecule.
Isoprene copolymer, acrylonitrile/butadiene copolymer, styrene/butadiene copolymer,
Examples include ethylene/propylene/butadiene copolymers and mixtures thereof. In order to improve the physical properties of the liquid polymer, polyols, polyamines, polycarboxylic acids, etc., such as glycerin, polyethylene glycol, 4,4'-methylene-bis(2-chloroaniline), N,N -Bis(2-hydroxypropanol)aniline, polypropylene glycol, 1,4-bis(β-hydroxyethoxy)
Benzene, neopentyl glycol hydropivalate, etc. may be added in a proportion of 0 to 50 parts by weight per 100 parts by weight of the liquid polymer. The petroleum resin used in the present invention has a softening point of 60
~180℃ and average molecular weight 500-3000, especially softening point
Petroleum resins with a temperature of 70-130°C and an average molecular weight of 800-1500 are preferred. Petroleum resin is a general term for polymerizable substances from specific fractions obtained in petroleum refining processes that are made into resin without being isolated and purified. Therefore, although the detailed composition cannot be shown, the monomer composition suggests that it is an aliphatic copolymer consisting of isoprene, piperylene, 2-methylbutene-1 or 2, etc., and aliphatic copolymers such as styrene, vinyltoluene, α - It is broadly classified into aromatic copolymers consisting of methylstyrene, coumaron, indene, etc. Additionally, additives such as powder fillers and anti-aging agents can be added to the liquid polymer composition as needed. Examples of powder fillers include inorganic powders such as calcium carbonate, clay, and talc, and coloring pigments. The blending amount is 0 to 300 parts by weight, preferably 50 to 200 parts by weight, per 100 parts by weight of the liquid polymer. As the anti-aging agent, those compounded in ordinary rubber products, such as amine-based and phenol-based anti-aging agents, can be used. The amount of these compounds is 0.1 to 100 parts of liquid polymer.
10 copies is appropriate. As the crosslinking agent used in the present invention, polyisocyanate compounds such as toluene diisocyanate, 4,4'-diphenylmethane diisocyanate, xylene diisocyanate, and isocyanate prepolymers thereof are suitable. Such a crosslinking agent is used in an amount of 5 to 50 parts by weight per 100 parts by weight of the liquid polymer. The crosslinking reaction is usually carried out at room temperature without heating, but the crosslinking rate can also be increased by adding a catalyst or heating. As such catalysts, metal compounds such as lead octenoate, cobalt naphthenate, ferric chloride, and dibutyltin dilaurate, and amines such as triethylamine and tetramethylethylenediamine are preferably used. In this case, the catalyst is preferably used in an amount of 0.01 to 2.0 parts by weight per 100 parts by weight of the liquid polymer. Since the composition used in the present invention is reinforced with petroleum resin, there is no need for pulverization using a special mixer such as a three-roll type, and it can be mixed uniformly with a simple mixer such as a three-blade type. It also contributes to labor saving in the manufacturing process. Next, the present invention will be explained in more detail with reference to Examples and Comparative Examples. In the examples, "parts" refer to parts by weight unless otherwise specified. Examples 1 to 4 and Comparative Examples 1 to 2 First, a polymer composition consisting of each component shown in Table 1 is prepared. The compositions of Examples 1 to 4 were mixed using a propeller shaft type mixer, and the compositions of Comparative Examples 1 to 4 were mixed using a propeller shaft type mixer.
Composition 2 was prepared by mixing and pulverizing with three rolls. Next, a predetermined amount of the crosslinking agent shown in Table 1 is added and mixed, and the crosslinking agent of about 2.0
After coating to a thickness of mm, it was cured at 20°C for 14 days and its physical properties were measured. The crosslinked product was subjected to alkali treatment and heat treatment, and its physical properties were measured. For alkaline treatment, immerse in 5% caustic soda boiling water solution for 4 days, and for heat treatment, immerse in 100℃ in a thermostatic chamber.
The test was carried out by standing at ℃ for 168 hours. The results are shown in Table 2.

【table】

【table】

[Table] As is clear from Table 2, when comparing the crosslinked products of Examples 1 to 4 and the crosslinked product of Comparative Example 1, the physical properties were significantly improved after 14 days by adding petroleum resin. It shows good results for petroleum resin formulation. The composition of Comparative Example 1 has low strength, especially tensile strength, and cannot be used in architectural applications. Moreover, the liquid polymer composition crosslinked product of the present invention is
Compared to the composition of Comparative Example 2, the physical properties after 14 days are slightly inferior, but the physical properties after alkali treatment and heat treatment are
It is understood that it is very good. The crosslinked products of Examples 1 to 4 and Comparative Example 1 were in good condition with almost no change in appearance even after treatment. The present invention solves the drawbacks of conventional diene-based liquid polymers, which were too weak to be used for construction purposes due to their low strength and could not be put to practical use, by incorporating petroleum resin, and has not only water resistance as a waterproofing material for construction, but also chemical resistance and heat resistance. , provides a material with excellent durability.

Claims (1)

[Scope of Claims] 1. A waterproofing material for construction, characterized in that a composition containing a diene liquid polymer having reactive active hydrogen and a petroleum resin is crosslinked with a crosslinking agent. 2 The average molecular weight of the diene liquid polymer is 500~
10,000, the architectural waterproofing material according to claim 1. 3. The waterproofing material for construction according to claim 1, wherein the petroleum resin has a softening point of 60 to 180°C and an average molecular weight of 500 to 3,000. 4. The waterproofing material for construction according to claim 1, wherein the composition contains 10 to 500 parts of petroleum resin per 100 parts by weight of diene liquid polymer. 5. The architectural waterproofing material according to claim 1, wherein the crosslinking agent is a difunctional or polyfunctional isocyanate.