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A kind of maleic anhydride grafted styrene block copolymer blending modified polyurethane hot melt adhesive and preparation method thereof

A polyurethane hot-melt adhesive and styrene block technology, which is applied in the field of modified polyurethane, can solve the problems of high cost and poor water resistance, and achieve the effects of improved compatibility, high peel strength and high quality

Active Publication Date: 2017-11-28
佛山南宝高盛高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The outer air-tight fabric layer can effectively block blood, bacteria, viruses, etc. to ensure safety; the inner breathable fabric layer can discharge the heat generated by the skin and maintain body comfort; the ideal film layer should have strong adhesive properties , high peel strength, good flexibility, strong aging resistance and low cost, while ordinary polyurethane hot melt adhesives have high cost and poor water resistance

Method used

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  • A kind of maleic anhydride grafted styrene block copolymer blending modified polyurethane hot melt adhesive and preparation method thereof
  • A kind of maleic anhydride grafted styrene block copolymer blending modified polyurethane hot melt adhesive and preparation method thereof
  • A kind of maleic anhydride grafted styrene block copolymer blending modified polyurethane hot melt adhesive and preparation method thereof

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preparation example Construction

[0025] A kind of preparation method of maleic anhydride grafted styrene block copolymer blending modified polyurethane hot-melt adhesive of the present invention, comprises the following steps:

[0026] 1) Preparation of polyurethane hot melt adhesive: add polyether diol, isocyanate and catalyst at 65-75°C, stir slowly for 0.5h, raise the temperature to 10°C, stir at a constant speed, react for 2-2.5h, add 1,4-butyl Glycol and defoamer, stir evenly, vacuumize to remove air bubbles, and obtain polyurethane hot melt adhesive;

[0027] In step 1), the feeding is carried out at 65-75°C, and after 0.5h of heat preservation and stirring, the temperature is raised to 10°C for prepolymerization, which can effectively prevent implosion and make the quality of the obtained polyurethane prepolymer higher; after prepolymerization, add expansion Chain agent 1,4-butanediol for chain extension;

[0028] 2) Preparation of maleic anhydride grafted styrene block copolymer: add naphthenic oil, ...

Embodiment 1

[0032] 1) Preparation of polyurethane hot-melt adhesive: MDI and PTMG are mixed in a molar ratio of 2.0:1, and 1.0% of the total mass of PTMG and MDI is added to carry out prepolymerization reaction to obtain a prepolymer. Add 1,4-butanediol and 0.8% T-105 antifoaming agent in the total mass of the prepolymer in an equimolar amount with PTMG, stirred evenly, and vacuumed at a vacuum degree of 0.09-0.1MPa to remove bubbles until no bubbles were obtained. Polyurethane hot melt adhesive;

[0033] 2) prepare maleic anhydride grafted styrene block copolymer: the styrene-isoprene-styrene copolymer (SIS) of the naphthenic oil of 40 weight parts, the maleic anhydride of 6 weight parts, 50 weight parts ), 1 part by weight of antioxidant was added to a kneader or a screw extruder at the same time, and reacted for 2 hours at 150°C to obtain a maleic anhydride grafted styrene-isoprene-styrene copolymer (abbreviated as MAH-SIS);

[0034] 3) Blending: After shear melting 30 parts by weight...

Embodiment 2

[0036] 1) Preparation of polyurethane hot-melt adhesive: MDI and PPG are mixed in a molar ratio of 2.0:1, and 1.0% of the total mass of PPG and MDI is added to carry out prepolymerization with dimorphinyl diethyl ether to obtain a prepolymer. 1,4-butanediol and 0.8% T-105 antifoaming agent in an equimolar amount of PPG and the total mass of the prepolymer are stirred evenly, and vacuumized to remove bubbles until there are no bubbles at a vacuum degree of 0.09-0.1MPa to obtain Polyurethane hot melt adhesive;

[0037] 2) prepare maleic anhydride grafted styrene block copolymer: the styrene-isoprene-styrene copolymer (SIS) of the naphthenic oil of 40 weight parts, the maleic anhydride of 7 weight parts, 50 weight parts ), 1 part by weight of antioxidant was added to a kneader or a screw extruder at the same time, and reacted for 2 hours at 150°C to obtain a maleic anhydride grafted styrene-isoprene-styrene copolymer (abbreviated as MAH-SIS);

[0038] 3) Blending: After shear me...

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Abstract

The invention provides a maleic anhydride grafted styrene block copolymer blending modified polyurethane hot-melt adhesive and a preparation method thereof. Specifically, the preparation method comprises the following steps: 1) preparing a polyurethane hot-melt adhesive: Add polyether diol, isocyanate and catalyst at 75°C, stir for 0.5h, then raise the temperature to 10°C for prepolymerization and chain extension to obtain polyurethane hot melt adhesive; 2) Preparation of maleic anhydride grafted styrene block copolymer: the ring Paraffin oil, maleic anhydride, styrene block copolymer and antioxidant copolymerization obtain maleic anhydride grafted styrene block copolymer; 3) blending: the maleic anhydride grafted styrene block copolymerization of step 2) After the material is sheared and melted, hydrogenated C5 petroleum resin is added to melt to melt, the temperature is lowered to 20°C, and the polyurethane hot melt adhesive and antioxidant in step 1) are blended evenly, and the bubbles are removed to obtain the maleic anhydride grafted styrene block copolymer Blending modified polyurethane hot melt adhesive. The blended modified polyurethane hot melt adhesive has high peel strength and good water resistance.

Description

technical field [0001] The invention relates to the field of modified polyurethane, in particular to a maleic anhydride grafted styrene block copolymer blended modified polyurethane hot melt adhesive and a preparation method thereof. Background technique [0002] As an adhesive, polyurethane hot melt adhesive has high reactivity, so it has excellent adhesive performance on metal, rubber, glass, ceramics, plastic, wood, fabric, leather and other materials, and has high peel strength At the same time, polyurethane has good flexibility, comfortable hand feeling and good fit, so it is also widely used in the adhesive bonding of fabrics and leather goods. [0003] In the purchase of reusable surgical gowns and surgical drapes, more and more hospitals at home and abroad are now more inclined to choose multi-layered medical surgical gowns and surgical drapes. This type of surgical gown or surgical cloth usually consists of a breathable fabric layer, an adhesive film layer and an a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/08C09J151/00C09J157/02C08G18/76C08G18/75C08G18/66C08G18/48C08G18/32C08F287/00
Inventor 高洁曹少波吴永升
Owner 佛山南宝高盛高新材料有限公司
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