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A kind of polyurethane windshield glue with rapid positioning ability and preparation method thereof
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A technology for windshield glass and polyurethane, which is used in polyurea/polyurethane adhesives, adhesives, non-polymer adhesive additives, etc.
Active Publication Date: 2019-02-19
HANGZHOU ZHIJIANG SILICONE CHEM +1
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Problems solved by technology
With the development of the modern automobile industry, the time from the installation of polyurethane windshield glue to the road test in the assembly workshop is gradually shortened to about 2 hours. However, in a low-temperature and low-humidity environment, if the polyurethane glue cannot form sufficient initial strength, the bonded glass, especially The front and rear windshields and large side windows will cause abnormal noise due to vehicle vibration during the road test, which will have a great impact on the judgment of the quality inspection link of the automobile factory
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[0052] The present invention provides a method for preparing polyurethane windshield glue described in the above technical solution, comprising the following steps:
[0053] Reaction of polyether polyol and first isocyanate to obtain polyurethane prepolymer A;
[0054] Reacting the resin diol compound with the second isocyanate to obtain the polyurethane prepolymer B;
[0055] The polyurethane prepolymer A, the polyurethane prepolymer B, the plasticizer, the water absorbing agent, the filler and the carbon black are uniformly mixed under the condition that the vacuum degree is not lower than 980 bar, then the catalyst is added, and the polyurethane windshield glue is obtained by stirring evenly.
[0056] In the present invention, the polyether polyol is reacted with the first isocyanate to obtain the polyurethane prepolymer A. The types of the polyether polyol and the first isocyanate are consistent with those described in the above technical solution, and will not be repeate...
Embodiment 1
[0081] The polyurethane prepolymer A1, A2, A3 in prefabricated embodiment 1, polyurethane prepolymer B1, B2, B3, plasticizer after dehydration, water-absorbing agent, filler after drying, carbon black are as shown in table 1 The dosage is added to a planetary mixer, mixed evenly under vacuum conditions, the vacuum degree is not lower than 980mbar, then the catalyst is added, and stirred evenly to obtain polyurethane windshield glue.
[0082] Wherein, the plasticizer used in Example 1 is diisodecyl phthalate, the filler is heavy calcium carbonate, the carbon black is oil-gas furnace carbon black, the water absorbing agent is alkylsulfonic acid isocyanate, and the amine catalyst is Dibutyltin dilaurate;
Embodiment 2
[0083] The plasticizer used in embodiment 2 is diisodecyl phthalate, the filler is talcum powder, the carbon black is oil-gas furnace carbon black, the water-absorbing agent is alkylsulfonic acid isocyanate, and the tin catalyst is dilauric acid two Butyl tin;
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Abstract
The invention provides a polyurethane windshield glass adhesive with capability of rapidly positioning and a preparation method thereof. The glass adhesive comprises the following components: 30-50% of a polyurethane prepolymer A, 0.5-5% of a polyurethane prepolymer B, 10-30% of a plasticizer, 10-30% of a filler, 10-30% of carbon black, 0.2-1% of a water absorbent and 0.01-1% of a catalyst, wherein the polyurethane prepolymer A is prepared by reaction of polyether polyols and isocyanates; the polyurethane prepolymer B is prepared by reaction of resin diol compounds and isocyanates; the resin diol compounds are selected from one or more of polyester resin diols, acrylic resin diols, polycarbonate diols, rosin resin diols, hydrogenated petroleum resin diols, terpene resin diols, phenolic resin diols, coumarone resin diols, xylene resin diols and ketone resin diols. The glass adhesive has high initial strength and is capable of rapidly positioning the windshield glass and meeting the requirement of driving way within a short time of vehicles.
Description
technical field [0001] The invention relates to the technical field of one-component polyurethane windshield glue, in particular to a polyurethane windshield glue with fast positioning capability and a preparation method thereof. Background technique [0002] One-component polyurethane windshield glue is a polyurethane adhesive with isocyanate (NCO) group-terminated polymer as the main active ingredient, and plasticizers, fillers, catalysts, and additives. Specifically refers to the one-component polyurethane adhesive used for bonding front and rear windshield glass, side window glass, sunroof glass or other glass components of automobiles. [0003] One-component polyurethane windshield glue is a moisture-curing product. In addition to its own performance, its curing speed is also affected by the moisture content in the air and the ambient temperature. Generally speaking, the lower the ambient temperature, the lower the humidity. , the slower the curing speed of the polyure...
Claims
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Application Information
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