Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L7/00—Compositions of natural rubber
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
  • C08C19/00—Chemical modification of rubber
  • C08C19/04—Oxidation
  • C08C19/06—Epoxidation
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
  • C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
  • C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons

Definitions

• the subject of the invention includes the way of obtaining polyamide-rubber joints without adhesive .
• the Japanese patent JP2010111794 includes description of a solution where during vulcanisation the raw rubber mixture is connected with polyamide without putting an adhesive layer and leads to obtainment of a product which can create a rubber composite strengthened with a layer of polyamide for example hoses with increased durability.
• the rubber mixture for direct connection with polyamide includes for 10 to 100 part of mass of talc and 0.1 to 30 part of mass of resin as a cross-linking agents converted into 100 part of mass of raw rubber mixture including from 60 to 90 % of mass of acrylonitrile-butadiene raw rubber and 40 to 10 % of mass of chlorinated butyl raw rubber.
• the elastomer mixture includes some of the following raw rubbers: EPDM (used in the quantity of 70-0 part of mass in relation to other raw rubbers), E-SBR, S-SBR, BR, R, IR, IIR, CIIR, BUR, BR, CR, block copolymers including styrene or mixtures of mentioned raw rubbers.
• EPDM used in the quantity of 70-0 part of mass in relation to other raw rubbers
• E-SBR used in the quantity of 70-0 part of mass in relation to other raw rubbers
• S-SBR S-SBR
• BR R
• IR IIR
• IIR IIR
• CIIR CIIR
• BUR CIIR
• BR CIIR
• CR block copolymers including styrene or mixtures of mentioned raw rubbers.
• the way of obtaining without adhesive layer polyamide-elastomer joints includes introduction of a modifier both to polyamide and mixtures of raw materials.
• the modifier has been selected from copolymers which include in their mers groups which may react with function groups of polyamide and co-vulcanise with butadiene raw rubbers in particular for making moldings there were chosen mixtures of polyamide 6 and/or 66 with additive 5-20 % of mass, epoxidized natural raw rubber, favourably 15 % and vulcanizates of sulphur elastomer mixtures: natural raw rubber, or butadiene-styrene, or isoprene-butadiene with additive of the modifier - epoxidized natural raw rubber from 15-50 %.
• the modifier is favourably introduced both to polyamide and raw rubber mixture.
• 10 % additive of epoxidized raw rubber to the elastomer mixture of natural raw rubber and/or isoprene-butadiene and/or isoprene-styrene raw rubber is optimal due to obtainment of adhesion strength in connection with polyamide.
• Mixtures of polyamide 6 or 66 with epoxidized natural raw rubber are prepared by mixing polyamide granulate or more favourably powder of this material with average granulation of 20 ⁇ in a twin screw extruder with rolled band of raw rubber with gap of 1-2 mm in temperature 220-280 °C, favourably 240- 270 °C with speed of rotation of the screws 200-400 1/min with the use of a finger head.
• An embossed rod is next cut into granules 3-4 mm long.
• Obtained polyamide, modified with raw rubber is injected in typical conditions for processing of this material not using anti-adhesive agents for lubricating formation surfaces of sockets. Obtained moldings are intended for injection or pressing on them rubber mixtures.
• the elastomer mixture by means of the mixing rolling method, is prepared by mixing 1000 mass parts of natural raw rubber or butadiene-styrene raw rubber or isoprene-butadiene, or another butadiene raw rubber with 50 to 200 mass parts, favourably 120 mass parts of epoxidized natural raw rubber and soot in the quantity of 700-1000 mass parts, sulphur in the quantity of 10-40 mass parts and accelerators of vulcanisation by means of two-shaft laboratory rolling stand with dimensions of rollers: length: 450 mm and diameter: 200 mm.
• friction 1, 1 - 1,2, temperature of rollers 40-60 °C and time of rolling from 8 to 15 minutes.
• Prepared raw rubber mixture in the form of a band with gauge 3-5 mm is subject to injection onto moulders made of modified, according to earlier description, polyamide in a machine adapted to processing of rubber mixtures or compression pressing, or rib pressing obtaining plastomer-elastomer moldings with good adhesion of one type of material to another without the necessity to apply adhesive interlayer put in additional operation.
• Strength of polyamide-elastomer joints obtained from such modified mixtures by means of the injection method or compression pressing confirm good adhesion of both materials equalling to joints obtained with application of an additional adhesive layer.
• Mixtures of natural raw rubber with additive of modifier - raw rubber ENR 25 are prepared according to the formulas shown in table 1 (mixtures M7 - M9) in accordance with the procedure described in example 1. Connections with the polyamide 6, modified according to example 1, are prepared by means of the injection technique and marked durability properties are collected in table 2.
• K ' - means an adhesive layer

Landscapes

• Chemical & Material Sciences (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Processes Of Treating Macromolecular Substances (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Manufacture Of Macromolecular Shaped Articles (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=58231098

Family Applications (1)

Country Status (2)

Cited By (1)

Citations (5)

• 2015
  • 2015-09-09 PL PL413891A patent/PL413891A1/pl unknown
  • 2015-09-23 WO PCT/PL2015/050041 patent/WO2017043987A1/en active Application Filing

Patent Citations (5)

Non-Patent Citations (2)

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