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Preparation method of hot-melt adhesive for multilayer oxygen-resistance pipe

A hot melt adhesive and oxygen barrier technology, applied in the direction of adhesives, graft polymer adhesives, adhesive types, etc., can solve problems such as unstable bonding, achieve fast bonding speed, simple preparation method, and high performance low consumption effect

Active Publication Date: 2013-07-17
GUANGZHOU LUSHAN NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the second type of pipe has more advantages than the first type of pipe in terms of production difficulty, cost and application, it needs to use hot melt adhesive to bond the oxygen barrier layer and the base layer of the pipe, while the existing hot melt adhesive is used for bonding There is a defect of unstable bonding between the oxygen barrier layer and the base layer

Method used

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  • Preparation method of hot-melt adhesive for multilayer oxygen-resistance pipe

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 10Kg of random copolymer polypropylene with MI of 0.6 g / 10min (2.16Kg, 230°C), 200g maleic anhydride, 30g dicumyl peroxide and 20g antioxidant 1010 in a high-speed mixer at 200rpm After mixing for 30 minutes, 150g of mineral oil or acetone can be added, so that a small amount of initiator can be adsorbed on the surface of HDPE particles to achieve their uniform mixing. The above-mentioned uniformly mixed materials are melted and mixed in a twin-screw extruder at an extrusion temperature of 200° C., unreacted monomers are removed under a vacuum of 0.1 MPa, and after cooling and pelletizing, a polypropylene graft is obtained.

[0030] The above-mentioned 4Kg polypropylene graft, 2Kg tackifying resin EPDM, 2Kg tackifying resin POE, 1Kg polyethylene elastomer versify de2300, and 1Kg styrene elastomer SEBS are thoroughly mixed uniformly through a high-mixer. The uniformly mixed materials are extruded and pelletized on a twin-screw extruder at an extrusion temperature of 190°C t...

Embodiment 2

[0032] The MI of 10Kg is 4.0 g / 10min (2.16Kg, 230℃) homopolymerized polypropylene, 150g maleic anhydride, 20g acrylic acid, 10g 2,5-dimethyl-2,5-bis(tert-butyl peroxide) ) Hexane and 20g antioxidant 215 are mixed in a high-speed mixer at 300 rpm for 10 minutes, 150g of mineral oil or acetone can be added, so that a small amount of initiator can be adsorbed on the surface of LLDPE particles to achieve their uniform mixing. The above-mentioned uniformly mixed materials are melted and mixed in a twin-screw extruder at an extrusion temperature of 190° C., unreacted monomers are removed under a vacuum of 0.1 MPa, and after cooling and pelletizing, a polypropylene graft is obtained.

[0033] The above-mentioned 3.5Kg polypropylene graft, 3.5Kg tackifying resin POE, 2Kg polyethylene elastomer versify de2300, and 1Kg styrene elastomer SIS are thoroughly mixed uniformly through a high mixer. The uniformly mixed materials are extruded and pelletized on a twin-screw extruder at an extrusion...

Embodiment 3

[0035] The 10Kg MI is 5.0 g / 10min (2.16Kg, 230℃) syndiotactic copolymer polypropylene, 150g maleic anhydride, 20g bis(tert-butylperoxyisopropyl)benzene and 10g antioxidant 215 at high speed The mixer is mixed at 250 rpm for 15 minutes, and 150 g of mineral oil or acetone can be added, so that a small amount of initiator can be adsorbed on the surface of the LLDPE particles to achieve their uniform mixing. The above-mentioned uniformly mixed materials are melted and mixed in a twin-screw extruder at an extrusion temperature of 190°C. The unreacted monomers are removed under a vacuum of 0.1 MPa, and after cooling and pelletizing, the grafted LLDPE is obtained.

[0036] The above 2Kg polypropylene grafted product, 4Kg MI of 0.7 g / 10min (2.16Kg, 230℃) copolymerized polypropylene, 1Kg tackifying resin POE, 1Kg polyethylene elastomer versify de 2300, fully mixed by a high mixer Evenly. Extrude and granulate the uniformly mixed materials on a twin-screw extruder at an extrusion tempera...

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Abstract

The invention discloses a preparation method of hot-melt adhesive for a multilayer oxygen-resistance pipe. The preparation method includes, by weight, taking 95-99.9 parts of polypropylene, 0.01-1 part of initiator, 0.1-4 parts of grafting monomer and 0.1-0.3 parts of antioxygen to be mixed by a high-speed mixer prior to adding mixture into a twin-screw extruder for melt grafting to obtain polypropylene graft; adding 10-99 parts of the polypropylene graft, 5-40 parts of tackifying resin, 10-40 parts of polyolefin elastic bodies, 0-30 parts of styrene class elastic bodies and 0-50 parts of polypropylene to the high-speed mixer to be evenly mixed prior to melting and blending by the twin-screw extruder to obtain the hot-melt adhesive for the multilayer oxygen-resistance pipe. The preparation method is simple in process and low in cost; mechanical property of the obtained hot-melt adhesive is excellent, and macromolecule oxygen-resistance materials EVOH (ethylene-vinyl alcohol copolymers) and PB (polybutylene) can be well adhered.

Description

[0001] Technical field [0002] The invention relates to the field of polymer materials, in particular to a method for preparing a hot melt adhesive for a multilayer oxygen barrier tube. The hot melt adhesive is mainly used to bond the base layer and barrier layer of the oxygen barrier tube for cold and hot water. [0003] Background technique [0004] At present, water supply pipelines used for domestic water transportation, radiator connection, air conditioning and floor heating can be divided into two categories according to their different structures, namely pure plastic pipes and plastic composite pipes. All pure plastic pipes are made of plastic, such as polypropylene (PP-R, PP-B, PP-H) pipes, cross-linked polyethylene (PE-Xa, PE-Xb, PE-Xc) pipes, heat-resistant polyethylene ( PE-RT) pipes, polybutene (PB) pipes, chlorinated polyvinyl chloride (PVC-C) pipes, polyvinyl chloride (PVC) pipes and polyethylene (PE) pipes, among which polybutene (PB) pipes The most widely used. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J151/06C09J123/08C09J123/16C09J145/00C09J193/04C09J191/06C09J157/02C09J123/00C09J123/04C09J123/10C09J153/02C09J109/06C09J123/14C09J123/12C08F255/02
Inventor 王明辉唐舫成汪加胜杜壮张阳阳
Owner GUANGZHOU LUSHAN NEW MATERIALS
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