Adhesive for pp substrate and preparation method and application thereof

A technology of adhesives and substrates, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve problems such as fire and environmental hazards, and achieve improved adhesion, high film strength and adhesion Focus on and avoid the effect of cumbersome process

Active Publication Date: 2022-08-02
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned adhesives all contain a large amount of organic solvents, which not only cause certain harm to the environment, but also easily cause fires due to excessive local temperatures during transportation and use.

Method used

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  • Adhesive for pp substrate and preparation method and application thereof
  • Adhesive for pp substrate and preparation method and application thereof
  • Adhesive for pp substrate and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-13

[0093] Embodiment 1-13 (namely S1-13) and comparative example 1-2 (namely D1-2)

Embodiment 1

[0095] 32g HDI (S1), 184g PPG2000 (S2), 68g PPA1200 (S3), 28g HTPB (S4), 0.1g 8108 catalyst through dehydration treatment were added to the 1L four-neck round bottom flask equipped with nitrogen inlet and outlet, The mixture was stirred at 80°C (denoted as reaction temperature 1) until the NCO reached the theoretical value (denoted as NCO theoretical value a) of 1.00%. The temperature was lowered to 50°C (referred to as reaction temperature 2), 4 g of KH270 (S5) was added, and the reaction was continued with stirring until NCO reached a new theoretical value (referred to as NCO theoretical value b) 0.65%. Add 0.5g triethylamine (component C) to the system, stir evenly to obtain adhesive a; test the viscosity of the adhesive a to be 11200cp; then add 50g AGE (component B) to the adhesive a system to carry out Stir and dilute to obtain adhesive b, and its viscosity is tested to be 8000cP; the adhesive b is sealed and stored.

[0096] Embodiment 2-13 and comparative example 1-2 ...

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Abstract

The invention provides an adhesive for PP base material, a preparation method and application thereof. The adhesive includes components A, B and C; component A is an end-capped prepolymer, and based on the total molar amount of end-capping groups in component A, the end-capping groups in component A at least include moles The percentage is 60% of isocyanate groups, the rest are silane groups; B component is a non-reactive diluent; C component is a catalyst; A component is prepared from raw materials including S1, S2, S3, S4 and S5, wherein , S1, S2, S3, S4 and S5 are diisocyanates, polyether polyols, polyester polyols containing pendant methyl groups, hydroxyl-terminated liquid rubbers and small molecules containing both silane groups and primary / secondary amine groups, respectively End-capping agent, its parts by weight are respectively 8.5-20, 10-60, 5-50, 5-20 and 0-8; the parts by weight of components B and C are respectively 0-20 and 0.1-0.6. The adhesive is applied to PP base material and has good bonding effect. Its preparation method is simple.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to an adhesive used for PP base materials, a preparation method and application thereof. Background technique [0002] As one of the five general-purpose plastics, polypropylene (PP) is non-toxic and tasteless, has a wide range of sources, low price, simple manufacturing process, excellent mechanical properties, heat resistance and chemical stability, and is widely used in industrial products, daily necessities, Automotive, packaging materials and other fields. However, since PP is a non-polar polymer, its surface tension is low and its crystallinity is high, which makes it difficult to adhere compared with general plastic products. In order to improve the adhesion to the PP surface, surface treatment is generally carried out by methods such as flame treatment, plasma treatment, radiation method, microwave method and corona discharge method to increase its surface energ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/14C08G18/42C08G18/48C08G18/69
CPCC09J175/14C08G18/698C08G18/4825C08G18/4238C08G18/4854
Inventor 王晓纪学顺晋云全刘云玲邓俊英孙家宽
Owner WANHUA CHEM GRP CO LTD
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