Bi-component elastomer polyurethane adhesive as well as manufacture method and application thereof

Abstract

The invention discloses an environmental-friendly bi-component elastomer polyurethane adhesive which comprises a polyurethane prepolymer component A and a curing agent component B, wherein the component A is the polyurethane prepolymer which is obtained by polymerization reaction of methyl diphenylene diisocyanate and polyester polyol with molecular weight of 300-3000 according to the weight ratio of 100:30-80; and the component B is the curing agent which at least comprises the following components by weight part: 40-300 parts of polylol, 5-20 parts of glycol and / or 5-10 parts of trimethylolpropane, and 0.0001-0.01 parts of reactive catalyst. The polyurethane adhesive can be applied to concrete road caulk compound.

Description

technical field

[0001] The invention relates to an environment-friendly two-component elastic body polyurethane adhesive, its preparation method and its application as road caulking glue. Background technique

[0002] Road traffic is one of the main modes of transportation in our country. In order to adapt to the changes in thermal expansion and contraction of concrete, protect the smoothness of the road surface, save road maintenance costs, and prolong the service life of the road, according to the relevant national regulations, an expansion joint must be reserved every few meters in the concrete road. The caulk is a material arranged in the expansion joint, which is used for waterproofing to protect the road subgrade. This requires that the caulk must have the characteristics of strong adhesion, high elongation and high strength of the material itself.

[0003] Petroleum asphalt was originally used as the main base material for caulking. Due to the poor weather resistance...

Examples

preparation example Construction

[0045] Preparation of two-component polyurethane adhesive composition

[0046] The preparation of the polyurethane composition of the present invention includes the synthesis of component A and the preparation of component B.

[0047] Synthesis of Component A

[0048] Component A is a polyurethane prepolymer formed by the polymerization reaction of MDI and polyester polyol, and the polymerization process is a commonly used method in the technical field.

[0049] In this process, the polyester polyol can be dehydrated first, so as to avoid the side reaction of forming polyurea due to the presence of water, which will cause the quality of the prepolymer to decline.

[0050] In addition, MDI can be preheated before the polymerization reaction, such as heating to 60°C, to avoid uneven molecular weight distribution and unstable quality of the prepolymer caused by large temperature changes.

[0051] The polymerization reaction is controlled at 50-100°C, preferably 60-80°C; the...

Embodiment 1

[0071] 1. Synthesis of polyurethane prepolymer component A:

[0072] (1) Dehydration of polyester: first put a sufficient amount of L-144 poly(adipate-butylene glycol-ethylene glycol) ester into a reaction kettle with a stirrer and a vacuum system, and heat it to 120°C under stirring , and then evacuated to -0.09MPa, dehydrated for 120 minutes, and then cooled to room temperature for use.

[0073] (2) Preparation of prepolymer: put 100 parts of MDI-100 into another reaction kettle, under the protection of nitrogen, stir and heat up to 60°C, then add L- 72 parts of 144 polyester, the feeding rate is based on the fact that the exotherm of the reaction mixture does not exceed 80°C as the upper limit. After the polyester is added, the reaction is continued for 4 hours, cooled to room temperature, packaged, and sealed for storage.

[0074] 2. Preparation of curing agent component B:

[0075] 40 parts of GEP-330N polyether polyol, 10 parts of GJ-9701 polyether polyol, 50 parts of ...

Embodiment 2

[0078] 1. Synthesis of polyurethane prepolymer component A:

[0079] Pre-install the MDI-100 and 3051 is mixed evenly by weight 3:1. 100 parts of the mixed diphenylmethane diisocyanate, 80 parts of L-244 polyester, and the operating conditions and steps are the same as in Example 1.

[0080] 2. Preparation of curing agent component B:

[0081] GEP-560 polyether polyol 50 parts, GJ-9701 polyether polyol 20 parts, GPOP-H45 polymer polyol 40 parts, ethylene glycol 15 parts, trimethylolpropane 10 parts, NIAX black 028 color paste 5 Part, 0.005 part of ZR-50 reactive catalyst, operating conditions and steps are with embodiment 1.

[0082] At 25°C, component A and component B were mixed evenly at a weight ratio of 2:1, and the curing speed was shown in Table 1; the mechanical properties and environmental protection characteristics of the cured material were shown in Table 2.

technical field

[0001] The invention relates to an environment-friendly two-component elastic body polyurethane adhesive, its preparation method and its application as road caulking glue. Background technique

[0002] Road traffic is one of the main modes of transportation in our country. In order to adapt to the changes in thermal expansion and contraction of concrete, protect the smoothness of the road surface, save road maintenance costs, and prolong the service life of the road, according to the relevant national regulations, an expansion joint must be reserved every few meters in the concrete road. The caulk is a material arranged in the expansion joint, which is used for waterproofing to protect the road subgrade. This requires that the caulk must have the characteristics of strong adhesion, high elongation and high strength of the material itself.

[0003] Petroleum asphalt was originally used as the main base material for caulking. Due to the poor weather resistance...

Examples

preparation example Construction

[0045] Preparation of two-component polyurethane adhesive composition

[0046] The preparation of the polyurethane composition of the present invention includes the synthesis of component A and the preparation of component B.

[0047] Synthesis of Component A

[0048] Component A is a polyurethane prepolymer formed by the polymerization reaction of MDI and polyester polyol, and the polymerization process is a commonly used method in the technical field.

[0049] In this process, the polyester polyol can be dehydrated first, so as to avoid the side reaction of forming polyurea due to the presence of water, which will cause the quality of the prepolymer to decline.

[0050] In addition, MDI can be preheated before the polymerization reaction, such as heating to 60°C, to avoid uneven molecular weight distribution and unstable quality of the prepolymer caused by large temperature changes.

[0051] The polymerization reaction is controlled at 50-100°C, preferably 60-80°C; the...

Embodiment 1

[0071] 1. Synthesis of polyurethane prepolymer component A:

[0072] (1) Dehydration of polyester: first put a sufficient amount of L-144 poly(adipate-butylene glycol-ethylene glycol) ester into a reaction kettle with a stirrer and a vacuum system, and heat it to 120°C under stirring , and then evacuated to -0.09MPa, dehydrated for 120 minutes, and then cooled to room temperature for use.

[0073] (2) Preparation of prepolymer: put 100 parts of MDI-100 into another reaction kettle, under the protection of nitrogen, stir and heat up to 60°C, then add L- 72 parts of 144 polyester, the feeding rate is based on the fact that the exotherm of the reaction mixture does not exceed 80°C as the upper limit. After the polyester is added, the reaction is continued for 4 hours, cooled to room temperature, packaged, and sealed for storage.

[0074] 2. Preparation of curing agent component B:

[0075] 40 parts of GEP-330N polyether polyol, 10 parts of GJ-9701 polyether polyol, 50 parts of ...

Embodiment 2

[0078] 1. Synthesis of polyurethane prepolymer component A:

[0079] Pre-install the MDI-100 and 3051 is mixed evenly by weight 3:1. 100 parts of the mixed diphenylmethane diisocyanate, 80 parts of L-244 polyester, and the operating conditions and steps are the same as in Example 1.

[0080] 2. Preparation of curing agent component B:

[0081] GEP-560 polyether polyol 50 parts, GJ-9701 polyether polyol 20 parts, GPOP-H45 polymer polyol 40 parts, ethylene glycol 15 parts, trimethylolpropane 10 parts, NIAX black 028 color paste 5 Part, 0.005 part of ZR-50 reactive catalyst, operating conditions and steps are with embodiment 1.

[0082] At 25°C, component A and component B were mixed evenly at a weight ratio of 2:1, and the curing speed was shown in Table 1; the mechanical properties and environmental protection characteristics of the cured material were shown in Table 2.

Images