CN1255524A - Copolyamide thermosol and its preparing process - Google Patents

Copolyamide thermosol and its preparing process Download PDF

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Publication number
CN1255524A
CN1255524A CN98121049A CN98121049A CN1255524A CN 1255524 A CN1255524 A CN 1255524A CN 98121049 A CN98121049 A CN 98121049A CN 98121049 A CN98121049 A CN 98121049A CN 1255524 A CN1255524 A CN 1255524A
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melt adhesive
hot melt
raw material
acid
copolyamide
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CN1094146C (en
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张恒利
张艳丽
王崇晖
解丽娟
宋喜军
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Sinopec Fushun Research Institute of Petroleum and Petrochemicals
China Petrochemical Corp
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Sinopec Fushun Research Institute of Petroleum and Petrochemicals
China Petrochemical Corp
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Abstract

A copolyamide thermosol is prepared from caprolactam or epsilon-aminocaproic acid, the nylon salt formed by isoequivalent mixing of one or more C6-C12 bibasic acids with one or more C6-C18 dibasic amine, and the nylon salt generated by isoequivalent mixing of one or more C13-C18 bibasic acids with one or more C6-C18 bibasic amine through copolymerization. Its advantages are low fusion temp, narrow temp range, high washing resistance and low cost. It can be used for liner of clothes.

Description

Copolyamide hot melt adhesive and preparation method thereof
The present invention relates to a kind of polymeric amide hot melt and preparation method thereof, particularly by long-chain biatomic acid synthetic copolyamide hot melt adhesive and preparation method thereof.
Polyamide hot is a kind of multipolymer, adopts more than three kinds or three kinds different carbon chain lengths nylon (salt) monomer copolycondensation and obtaining by a certain percentage.Polyamide hot is used to make apparel binding fibre cloth in a large number, also can be used for the bonding of temperature-sensitive materials such as fur coat, leather, is characterized in lower, the narrow range of melt temperature, be convenient to processing, the bonding strength height, snappiness, wear resistance are good, not only water-fast washing but also anti-dry-cleaning etc.
External at present high-grade polyamide hot product all adopts the PA6/66/12 terpolymer, and the ratio of its PA-12 reaches (for body material) more than 60%, because the higher cost of polyamides that finally causes of price of PA-12 is higher.Domestic employing nylon-1010 is as the synthetic hot melt adhesive of raw material, because the carbochain of nylon-1010 polymkeric substance is shorter, aspects such as its dimensional stability, water-wash resistance are poor than PA-12, and fusing point is higher, can only be used for, low-grade clothes lining cloth.
In order to reduce the fusing point of polyamide hot, improve its water-wash resistance, strengthen its bonding strength and snappiness, many patents have all proposed diverse ways.US3,989,678 adopt branchedly 2,2, and 4-trimethylhexamethylenediamine and 2,4,4-trimethylhexamethylenediamine are made nylon salt synthesizing polyamides hot melt adhesive, and its water-wash resistance and fusing point have had tangible improvement.Shortcoming is that raw material sources are limited, and is on the high side.US4,045,389 adopts dimer (fatty acid) yl, straight chain C 6-C 13Dicarboxylic acid and straight chain C 6-C 12Two primary diamines be raw material synthesizing polyamides hot melt adhesive, this glue has higher water-wash resistance.But, contain a certain amount of unary fatty acid in addition in the dimer (fatty acid) yl and make its dry cleaning resistance relatively poor because the dimer (fatty acid) yl alkyl chain is oversize.
The purpose of this invention is to provide a kind of have low melting point, high bond strength, the good water-fast copolyamide hot melt adhesive of washing with dry cleaning resistance, the present invention has also reduced production cost in addition.Another object of the present invention is the preparation method who provides copolyamide hot melt adhesive of the present invention simultaneously.
Copolyamide hot melt adhesive of the present invention contains following copolymerization units a, b, and c:
A. hexanolactam or ε-amidcaproic acid 15w%～58w%, preferred 26w%～51w%;
B. one or more C 6-C 12Diprotic acid and one or more C 6-C 18The diamine equivalent mixes the nylon salt 10w%～63w% that forms, preferred 15w%～50w%;
C. one or more C 13-C 18-diprotic acid and one or more C 6-C 18The diamine equivalent mixes the nylon salt 5w%～64w% that forms, preferred 16w%～54w%.
This copolyamide hot melt adhesive has following feature: fusing point is 90～160 ℃, is preferably 100～130 ℃, and molecular weight is 8000～30000, be preferably 15000～20000, relative viscosity 1.3-2.5 is preferably 1.5～1.7, melting index 5～25g/10min is preferably 10～20g/10min.
The above-mentioned C that mentions 6-C 12Diprotic acid can be hexanodioic acid, nonane diacid, sebacic acid, undecane diacid and dodecanedioic acid etc., also can be the mixture of several diprotic acid wherein; C 13-C 18Diprotic acid can be brassylic acid, thapsic acid, pentadecane diacid, Thapsic acid, pentadecane dicarboxylic acid and octadecane diacid etc., also can be the mixture of several diprotic acid wherein.C 6-C 18Diamine can also can be the mixture of several diamines wherein for hexanediamine, nonamethylene diamine, decamethylene diamine, undecane diamines, dodecane diamines, tridecane diamines, tetradecane diamines, pentadecane diamines, n-Hexadecane diamines, heptadecane diamines, octadecamethylene diamine etc.Wherein diprotic acid can make with the method for fermentation, also can obtain with other method; Diamine can be transformed by the fermentation diprotic acid and obtain, and also can be obtained by other method.
Copolyamide hot melt adhesive of the present invention can directly add hexanolactam or ε-amidcaproic acid, diamine and diprotic acid are made, also can make corresponding nylon salt mix with hexanolactam the back copolymerization obtain.The consumption of each raw material is: raw material a is 15w%～58w%, preferred 26w%～51w%; Raw material b is 10w%～63w%, preferred 15w%～50w%; Raw material c is 5w%～64w%, preferred 16w%～54w%.
The copolyreaction process is divided into compressive reaction stage and synthesis under normal pressure stage, and wherein the reaction conditions in compressive reaction stage is: 220～300 ℃ of temperature, preferred 250～270 ℃, pressure 1.0～2.5MPa, preferred 1.7～2.0MPa in 1～4 hour reaction times, is preferably 2～3 hours; Be depressurized to normal pressure then, carry out the synthesis under normal pressure stage, 220～300 ℃ of temperature of reaction, preferred 250～270 ℃, step-down and synthesis under normal pressure time were controlled at 1～5 hour, were preferably 4～5 hours.The reaction back obtains copolyamide hot melt adhesive product of the present invention by drain hole wire drawing, water cooling and pelletizing.
Copolyamide hot melt adhesive of the present invention is a water white transparency or translucent.According to arts demand, can add such as additives such as softening agent, matting agent, oxidation inhibitor, static inhibitor, sterilant and dyestuffs.Copolyamide hot melt adhesive of the present invention can spinning, become various ways such as powder, system film and non-woven fabrics to use, and sieves after pulverizing as liquid nitrogen freezing, and 30～80 orders can be made fusible interlining in cotton, hair, fiber crops and synthetic fiber cloth or non-woven fabrics dusting and heating; 80～200 orders can carry out the heating of powder point and make fusible interlining; But make fusible interlining greater than slurry point heating after the 200 order slurrying, its with the powder amount at 10～60g.Also can under 160～280 ℃, make 15～60g/m in addition 2Film, thickness is 20～50 μ m.
Discover, in copolyamide, add the diprotic acid of longer carbochain or the nylon monomer (salt) of diamine composition and carry out copolymerization, can improve the performances such as fusing point, washing property and dry-cleaning property of hot melt adhesive.The present invention uses C 13～C 18Diprotic acid improves the use properties of copolyamide hot melt adhesive, and the content of three kinds of copolymerization units a, b, c also has bigger influence to the use properties of copolyamide hot melt adhesive.When unit c increased with respect to unit a, this copolyamide hot melt adhesive was owing to increased long carbochain biatomic acid, and the transparency of polyamide hot increases, fusing point reduces, water-wash resistance increases; And unit c is when excessively increasing with respect to unit a, and the fusing point of polyamide hot raises on the contrary, and dry cleaning resistance weakens.Can be washed and be dry-cleaned the copolyamide hot melt adhesive that intensity conforms to service requirements by the suitable proportioning of adjusting each unit content, can be selected copolyamide hot melt adhesive fusing point according to different demands simultaneously.The present invention has adopted C 13-C 18Long-chain biatomic acid as improve copolyamide hot melt adhesive fusing point, cohesive strength, water-fastly wash, the component of dry cleaning resistance, synthetic copolyamide hot melt adhesive melt temperature is low, narrow range, be convenient to processing, the bonding strength height, snappiness, wear resistance are good, ageing-resistant performance is good, water-fast washing and anti-dry-cleaning, long-chain biatomic acid wide material sources and consumption are less relatively, make product cost relatively low.
Concrete test of the present invention will be illustrated in following examples.
Embodiment 1:
Be respectively 32/35/33 (w%) adding by batch mixing proportioning 6/610/613 and have in the autoclave of stirring, nitrogen replacement three times is heated to 270 ℃ of temperature in the kettle, and pressure keeps 1.7MPa, reacts 2 hours.Keep 270 ℃ of temperature of reaction then, be depressurized to normal pressure, and continued reaction 2 hours in 2 hours.By drain hole wire drawing, water cooling and pelletizing down.Obtaining copolyamide hot melt adhesive melting range is 120～130 ℃, and relative viscosity is 1.7, and molecular-weight average is 20000, and melting index is 10g/10min.
Measure fusing point (both the DSC endotherm(ic)peak was 121.5 ℃) with DuPont 2000 dsc analysis instrument behind the gained hot melt adhesive airing, melting range is 120-130 ℃.Hot melt adhesive is made the film of 20 * 30cm, and its glue consumption is 60g/m 2, thickness is 50 μ m.Be cut into the small pieces of 5 * 14cm then.Select hair wash or polyester-mixed cotton cloth as the bonding object, be cut into the cloth sheet of 14 * 16cm, after the doubling above-mentioned hot melt adhesive small pieces are sandwiched in wherein, press down and press 10 seconds at 140 ℃, 20kPa pressure, be cut into the cloth of 7 * 2.5cm at last.When measuring washing or dry-cleaning intensity, cut into inch strips again after washing.The both sides of no glue are fixed on carry out stripping strength on the puller system and measure, speed is 100mm/min.Get the mean value of its 5 adhesive plaster stripping strengths.Washing stripping strength and dry-cleaning stripping strength are respectively 3.5 and 4.0kg/25mm, and initial bonding strength is 6.0kg/25mm.Industry washing property condition determination is 60 ℃ of washing 30min, still surfacing after the continuous washing 6 times, no bubble.
Embodiment 2～16
Synthetic hot melt adhesive of the present invention under different technology conditions, its processing condition see Table 1, and other analytical procedure is with embodiment 1, and it the results are shown in Table 2.
The reaction conditions of table 1 embodiment 2～16
Embodiment The compressive reaction stage Step-down, synthesis under normal pressure stage
Pressure/MPa Temperature/℃ Time/h Temperature/℃ Time/h
????2 ????2.0 ????270 ????2 ????270 ????4
????3 ????2.0 ????270 ????2 ????270 ????2
????4 ????1.8 ????260 ????3 ????260 ????4
????5 ????1.7 ????260 ????3 ????260 ????4.5
????6 ????1.7 ????260 ????3 ????260 ????4.5
????7 ????2.4 ????290 ????2 ????280 ????3.5
????8 ????1.8 ????270 ????2 ????270 ????4
????9 ????2.0 ????270 ????2 ????270 ????4
????10 ????1.7 ????250 ????3 ????250 ????4.5
????11 ????1.7 ????250 ????3 ????250 ????4.5
????12 ????2.0 ????270 ????2 ????270 ????4
????13 ????1.8 ????270 ????2 ????270 ????4
????14 ????1.8 ????270 ????2 ????270 ????4
????15 ????1.1 ????250 ????1.5 ????250 ????2.5
????16 ????1.7 ????230 ????4 ????220 ????5
The test-results of table 2 copolyamide thermosol
Embodiment Material name Material rate w% Fusing point ℃ Relative viscosity Molecular weight Stripping strength kg/25mm The industry washing times
Initial value Washing property Dry-cleaning property
??1 ??6/610/613 ?32/35/33 ?120-130 ?1.70 ??20000 ??6.0 ??3.5 ??4.0 ??6
??2 ??6/1010/613 ?32/28/40 ?100-115 ?1.65 ??19000 ??＞6.0 ??＞4.0 ??＞4.0 ??10
??3 ??6/1010/1013 ?42/25/33 ?95-113 ?1.60 ??17100 ??＞6.0 ??＞4.0 ??＞4.0 ??＞10
??4 ??6/1010/614 ?40/30/30 ?102-117 ?1.60 ??17000 ??＞6.0 ??＞4.0 ??＞4.0 ??＞10
??5 ??6/1010/615 ?51/30/19 ?92-108 ?1.55 ??15800 ??＞6.0 ??＞4.0 ??＞4.0 ??＞10
??6 ??6/1010/616 ?45/30/25 ?101-115 ?1.50 ??15000 ??＞6.0 ??＞4.0 ??＞4.0 ??＞10
??7 6/1010/6 nitration mixture I ?15/60/25 ?137-152 ?2.30 ??28000 ??＞6.0 ??＞4.0 ??＞4.0 ??＞10
??8 6/1010/10 nitration mixture I ?37/55/8 ?98-109 ?1.55 ??16000 ??＞6.0 ??＞4.0 ??＞4.0 ??＞10
??9 6/66/ mixes amine I nitration mixture I ?26/29/45 ?110-125 ?1.70 ??20000 ??＞6.0 ??＞4.0 ??＞4.0 ??＞10
??10 6/ mixes amine I10/ mixes amine I nitration mixture I ?40/15/45 ?98-111 ?1.50 ??15200 ??＞6.0 ??＞4.0 ??＞4.0 ??＞10
??11 6/ mixes amine I6/ mixes amine I nitration mixture I ?35/20/45 ?102-119 ?1.52 ??15500 ??＞6.0 ??＞4.0 ??＞4.0 ??＞10
??12 6/1010/6 nitration mixture II ?38/32/30 ?99-115 ?1.65 ??18000 ??＞6.0 ??＞4.0 ??＞4.0 ??＞10
??13 6/1010/10 nitration mixture II ?40/40/20 ?95-111 ?1.50 ??15000 ??＞6.0 ??＞4.0 ??＞4.0 ??＞10
??14 6/66/ mixes amine II nitration mixture II ?20/20/60 ?100-118 ?1.67 ??19800 ??＞6.0 ??＞4.0 ??＞4.0 ??＞10
??15 6/ mixes amine II10/ mixes amine II nitration mixture II ?55/14/31 ?95-108 ?1.4 ??9000 ??＞6.0 ??＞4.0 ??＞4.0 ??＞10
??16 */mix amine II6/ to mix amine II nitration mixture II ?50/31/19 ?97-110 ?1.50 ??15200 ??＞6.0 ??＞4.0 ??＞4.0 ??＞10
That * uses is ε-amidcaproic acid.
Nitration mixture I in above-mentioned each example is the mixed dibasic acid that No. 1 whiteruss fermentation by oil three factories obtains, and the ratio 10/11/12/13 of various acid is: 23/28/27/21 (weight); Mixing amine I is the mixing diamine that above-mentioned nitration mixture I obtains through nitrilation, hydrocracking.Nitration mixture II is the mixed dibasic acid that No. 2 whiterusss fermentation by oil three factories obtains, and the ratio 11/12/13/14 of various acid is: 23/23/24/29 (weight); Mixing amine II is the mixing diamine that above-mentioned nitration mixture II obtains through nitrilation, hydrocracking.
Annotate: copolyamide hot melt adhesive performance of the present invention is measured by the following method:
1. the mensuration of stripping strength:
The hot melt adhesive system of employing embrane method.At first hot melt adhesive is made the film of 20 * 30cm, its glue consumption is 60g/m 2, thickness is 50 μ m.Be cut into the small pieces of 5 * 14cm then.Select hair wash or polyester-mixed cotton cloth as the bonding object, be cut into the cloth sheet of 14 * 16cm, after the doubling above-mentioned hot melt adhesive small pieces are sandwiched in wherein, pressing to pressing under fixed temperature, pressure and time, (be that a slice presses the adhesive plaster press to be cut into 5, adhesive tape wherein is of a size of 5 * 2.5cm) to be cut into the cloth of 7 * 2.5cm at last.If when needing washing or dry-cleaning, cut into inch strips again after washing.The both sides of no glue are fixed on carry out stripping strength on the puller system and measure, speed is 100mm/min.Get the mean value of its 5 adhesive plaster stripping strengths.
2. washing property mensuration:
The mensuration of washing stripping strength: the adhesive plaster of above-mentioned not slitting is placed washing machine, add " three prestige " washing powder that 35 premium on currency and 1.05kg Shenyang Fat Chemical Plant produce.Do two kinds of tests of 60 ℃ of washing 45min and 95 ℃ washing 90min respectively, airing then is cut into the cloth of 7 * 2.5cm, carries out stripping strength and measure on puller system.
Industry washing property mensuration: hot-melt adhesive powder 80～200 orders are made fusible interlining by powder point machine, wash with hair again or polyester-mixed cotton cloth adds thermal caking, be cut into the fritter of 20 * 30cm at last.In water, add " three prestige " washing powder that Shenyang Fat Chemical Plant of 1% produces, 60 ℃ of washing 30min, airing again after the drying is tested after washing 5 times altogether with similarity condition continuously, if surfacing, the no bubble of cloth then are good.
3. dry-cleaning property mensuration:
The mensuration of dry-cleaning stripping strength: the adhesive plaster of above-mentioned not slitting is placed 2 liters of triangular flasks, add 1.5 liters of zellons.Do two kinds of tests of 60 ℃ of dry-cleaning 60min and 30 ℃ dry-cleaning 30min respectively, then airing, be cut into the cloth of 7 * 2.5cm, on puller system, carry out stripping strength and measure.
Industry dry-cleaning property mensuration: hot-melt adhesive powder 80～200 orders are made fusible interlining by powder point machine, wash with hair again or polyester-mixed cotton cloth adds thermal caking, be cut into the fritter of 20 * 30cm at last.Zellon dry-cleaning, 30 ℃ of washing 30min, airing again after the drying is tested after washing 5 times altogether with similarity condition continuously, if surfacing, the no bubble of cloth then are good.
4. the mensuration of relative viscosity
The copolyamide hot melt adhesive is dissolved in the solution that meta-cresol is made into 0.5w%, and the ratio of its viscosity and meta-cresol viscosity is relative viscosity.
5. the condition determination of melting index is 150 ℃ of temperature, pressure 2160g.

Claims (8)

1. a copolyamide hot melt adhesive is characterized in that containing following copolymerization units a, b, and c:
A. hexanolactam or ε-amidcaproic acid 15w%～58w%;
B. one or more C 6-C 12Diprotic acid and one or more C 6-C 18The diamine equivalent mixes the nylon salt 10w%～63w% that forms;
C. one or more C 13-C 18-diprotic acid and one or more C 6-C 18The diamine equivalent mixes the nylon salt 5w%～64w% that forms;
This copolyamide hot melt adhesive has following feature: 90～160 ℃ of fusing points, molecular weight 8000～30000, relative viscosity 1.3-2.5, melting index 5～25g/10min.
2. according to the copolyamide hot melt adhesive of claim 1, it is characterized in that unit a content is 26w%～51w%, unit b content is 15w%～50w%, and unit c content is 16w%～54w%.
3. according to the copolyamide hot melt adhesive of claim 1 or 2, it is characterized in that this hot melt adhesive has following feature: 100～130 ℃ of fusing points, molecular weight 15000～20000, relative viscosity 1.5-1.7, melting index 10～20g/10min.
4. the preparation method of the described copolyamide hot melt adhesive of claim 1, directly add hexanolactam or ε-amidcaproic acid, diamine and diprotic acid and obtain, or make corresponding nylon salt and mix with hexanolactam after the copolyreaction process obtains through the copolyreaction process; The consumption that it is characterized in that each raw material is:
Raw material a: hexanolactam or ε-amidcaproic acid 15w%～58w%;
Raw material b: one or more C 6-C 12Diprotic acid and one or more C 6-C 18The diamine equivalent mixes the nylon salt 10w%～63w% that forms;
Raw material c: one or more C 13-C 18Diprotic acid and one or more C 6-C 18The diamine equivalent mixes the nylon salt 5w%～64w% that forms;
5. by the method for claim 4, it is characterized in that described copolyreaction process divides compressive reaction stage and step-down, synthesis under normal pressure stage, compressive reaction stage condition is: 220～300 ℃ of temperature, pressure 1.0～2.5MPa, reacted 1～4 hour; Step-down, synthesis under normal pressure stage condition are: 220～300 ℃ of temperature, reacted 1～5 hour.
6. according to the method for claim 4, it is characterized in that the consumption of described each raw material is: raw material a is 26w%～51w%, and raw material b is 15w%～50w%, and raw material c is 16w%～54w%.
7. according to the method for claim 5, it is characterized in that the reaction conditions in described compressive reaction stage is: 250～270 ℃ of temperature, reaction pressurization 1.7～2.0MPa, 2～3 hours reaction times.
8. according to the method for claim 5, it is characterized in that described step-down, the reaction conditions in synthesis under normal pressure stage are: 250～270 ℃ of temperature, reaction times 4～5.
CN 98121049 1998-12-03 1998-12-03 Copolyamide thermosol and its preparing process Expired - Lifetime CN1094146C (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100365092C (en) * 2003-09-15 2008-01-30 中国石油化工股份有限公司 Thermosol of polyamide and preparation process thereof
CN105349088A (en) * 2015-12-21 2016-02-24 上海天洋热熔粘接材料股份有限公司 Novel hot-melt adhesive and preparation method thereof
CN105504271A (en) * 2016-02-03 2016-04-20 温州华特热熔胶有限公司 Low-melting-point copolyamide hot melt adhesive for clothes and processing method thereof
CN108203508A (en) * 2016-12-16 2018-06-26 中国石油化工股份有限公司 A kind of modified nylon-6 material and preparation method thereof
CN110184025A (en) * 2019-06-26 2019-08-30 上海天洋热熔粘接材料股份有限公司 A kind of preparation method of low-melting-point copolyamide hot melt adhesive

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100365092C (en) * 2003-09-15 2008-01-30 中国石油化工股份有限公司 Thermosol of polyamide and preparation process thereof
CN105349088A (en) * 2015-12-21 2016-02-24 上海天洋热熔粘接材料股份有限公司 Novel hot-melt adhesive and preparation method thereof
WO2017107859A1 (en) * 2015-12-21 2017-06-29 昆山天洋热熔胶有限公司 Novel hot-melt adhesive and preparation method therefor
CN105349088B (en) * 2015-12-21 2018-02-27 上海天洋热熔粘接材料股份有限公司 A kind of PUR and preparation method thereof
US10703938B2 (en) 2015-12-21 2020-07-07 Kunshan Tianyang Hot Melt Adhesive Co., Ltd Hot-melt adhesive and preparation method therefor
CN105504271A (en) * 2016-02-03 2016-04-20 温州华特热熔胶有限公司 Low-melting-point copolyamide hot melt adhesive for clothes and processing method thereof
CN108203508A (en) * 2016-12-16 2018-06-26 中国石油化工股份有限公司 A kind of modified nylon-6 material and preparation method thereof
CN110184025A (en) * 2019-06-26 2019-08-30 上海天洋热熔粘接材料股份有限公司 A kind of preparation method of low-melting-point copolyamide hot melt adhesive

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