CN100415845C - Preparation process and application of water resistant starch-base timber adhesive - Google Patents

Preparation process and application of water resistant starch-base timber adhesive Download PDF

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Publication number
CN100415845C
CN100415845C CNB2006101560256A CN200610156025A CN100415845C CN 100415845 C CN100415845 C CN 100415845C CN B2006101560256 A CNB2006101560256 A CN B2006101560256A CN 200610156025 A CN200610156025 A CN 200610156025A CN 100415845 C CN100415845 C CN 100415845C
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China
Prior art keywords
starch
vinyl acetate
graft copolymer
agent
reaction
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CNB2006101560256A
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Chinese (zh)
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CN100999651A (en
Inventor
顾正彪
洪雁
李兆丰
王嫣
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江南大学
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Abstract

The present invention belongs to the field of adhesive technology, and provides one kind of starch-base timber adhesive with excellent water resistance and its preparation process and application. The starch-base timber adhesive with excellent water resistance has wide material source, no environmental pollution and high adhesion strength, and may be used widely in timber adhesion.

Description

A kind of preparation method of water resistant starch-base timber adhesive and application

Technical field

A kind of preparation method of water resistant starch-base timber adhesive and application, this tackiness agent are starch and vinyl acetate grafting and through crosslinked, mix with auxiliary agent again, belong to the adhesive technology field.

Background technology

Starch-base timber adhesive be a kind of be the macromolecular compound of main raw material with starch, have that raw material sources are extensive, bonding strength is high, cost is lower, free of contamination advantage.Starch-base timber adhesive is applied to all reach national standard on the dried wet tenacity of being bonded in of timber-work, but has the shortcoming of poor water resistance in actual use.Therefore, it is very necessary seeking the water tolerance that a kind of method of modifying improves product.

Summary of the invention

The object of the present invention is to provide a kind of preparation method and application thereof of water resistant starch-base timber adhesive.Earlier by starch in hydrochloric acid soln, under the acidic conditions with the Vinyl Acetate Monomer graft copolymerization, with N, N '-methylene-bisacrylamide generation crosslinking reaction, obtain starch-vinyl acetate cross-connect graft copolymer, under neutrallty condition, mix again, prepare water-proof starch-base timber adhesive with polyvinyl alcohol 124, borax, urea, glycerine, tributyl phosphate.

Technical scheme of the present invention: a kind of preparation method of water resistant starch-base timber adhesive is starch and vinyl acetate graft copolymerization and through crosslinked, mixes with auxiliary agent again.

Synthesizing of described starch-vinyl acetate cross-connect graft copolymer: with starch is raw material, with hydrochloric acid is catalyzer, with the ammonium persulphate is initiator, with the vinyl acetate is monomer, under acidic conditions, carry out graft copolymerization, then with N, N '-methylene-bisacrylamide is a linking agent, carries out crosslinking reaction and synthetic starch-vinyl acetate cross-connect graft copolymer.

Described starch-vinyl acetate cross-connect graft copolymer mixes with auxiliary agent: be with starch-vinyl acetate cross-connect graft copolymer under neutrallty condition, with polyvinyl alcohol 124 is properties-correcting agent, with the borax is the secondary crosslinking agent, after the gelatinization, with urea is thinner, glycerine is softening agent, and tributyl phosphate is a defoamer, obtains water resistant starch-base timber adhesive after the mixing.

Synthesizing of starch-vinyl acetate cross-connect graft copolymer, with starch is raw material, after being mixed with mass percentage concentration and being 30%~40% starch emulsion, with hydrochloric acid is catalyzer, and ammonium persulphate is an initiator, adds to account for starch quality than 75%~85% Vinyl Acetate Monomer, in the scope of pH3~5, slowly drip and carry out graft copolymerization, the graft reaction temperature is 60~70 ℃, 2~4 hours graft reaction time; At graft reaction after 1~2 hour, add account for starch quality than be 0.2%~0.4%, mass concentration is 1%~2% N, N '-methylene-bisacrylamide linking agent.Reinforced and reaction is all under agitation carried out, and reaction product is starch-vinyl acetate cross-connect graft copolymer.

Add the auxiliary agent synthetic adhesive: with synthetic starch-vinyl acetate cross-connect graft copolymer is main raw material, it is 10%~15% that adding accounts for the starch quality ratio, mass concentration is 5%~10% polyvinyl alcohol 124, it is 0.1%~0.2% that adding accounts for the starch quality ratio, mass concentration is 0.5%~1% borax, it is 10%~15% that adding accounts for the starch quality ratio, mass concentration is 5%~10% urea, add and account for starch quality than the glycerine that is 10%~15%, add and account for starch quality than the tributyl phosphate that is 2%~5%, reinforced and reaction is all under agitation carried out, and reaction product is the water resistant starch base adhesive.

The application of described water resistant starch-base timber adhesive is mainly used in adhesive bonding of wood.

Beneficial effect of the present invention: the water resistant starch-base timber adhesive that the present invention makes is compared with existing wood adhesive, has following advantage:

1, this tackiness agent improves a lot the water tolerance of tackiness agent because the structure that crosslinked action forms can effectively reduce the destruction of water molecules to tackiness agent.

2, because the kind and the usage quantity of auxiliary agent are optimized, the water tolerance of tackiness agent is further improved.

3, because the three-dimensional structure that tackiness agent forms is more stable, help keeping the molecular configuration of tackiness agent after modification, prevent to destroy, improve the storage property of tackiness agent in storage, the degraded of bonding process medium-chain.

Embodiment

Embodiment 1

Synthesizing of starch-vinyl acetate cross-connect graft copolymer, with starch is raw material, after being mixed with mass percentage concentration and being 30~40% starch emulsion, with hydrochloric acid is catalyzer, and ammonium persulphate is an initiator, in the scope of pH3~5, slowly drip and account for starch quality than 75%~85% Vinyl Acetate Monomer, carry out graft copolymerization, the graft reaction temperature is 60~70 ℃, 2~4 hours graft reaction time; At graft reaction after 1~2 hour, add account for starch quality than be 0.2%~0.4%, mass concentration is 1%~2% N, N '-methylene-bisacrylamide linking agent.Reinforced and reaction is all under agitation carried out, and reaction product is starch-vinyl acetate cross-connect graft copolymer.

Starch-vinyl acetate cross-connect graft copolymer mixes with auxiliary agent, with synthetic starch-vinyl acetate cross-connect graft copolymer is main raw material, it is 10%~15% that adding accounts for the starch quality ratio, mass percent is 5%~10% polyvinyl alcohol 124, it is 0.1%~0.2% that adding accounts for the starch quality ratio, mass percent is 0.5%~1% borax, it is 10%~15% that adding accounts for the starch quality ratio, mass percent is 5%~10% urea, add and account for starch quality than the glycerine that is 10%~15%, add and account for starch quality than the tributyl phosphate that is 2%~5%, reinforced and reaction is all under agitation carried out, and reaction product is a water resistant starch-base timber adhesive.

Embodiment 2

The compression shear strength of commercially available white glue with vinyl, amylan and water tolerance timber glue of the present invention and water tolerance compare, and as can be found from Table 1, the compression shear strength and the water tolerance of water tolerance timber glue of the present invention all are higher than commercially available white glue with vinyl and amylan.

Three kinds of glue laminateds of table 1 contract shearing resistance and water-proof comparison

Claims (4)

1. the preparation method of a water resistant starch-base timber adhesive is characterized in that starch and vinyl acetate graft copolymerization and process are crosslinked, mixes with auxiliary agent again;
(1) starch-vinyl acetate cross-connect graft copolymer is synthetic: with starch is raw material, with hydrochloric acid is catalyzer, with the ammonium persulphate is initiator, with the vinyl acetate is monomer, under acidic conditions, carry out graft copolymerization, then with N, N '-methylene-bisacrylamide is a linking agent, carries out crosslinking reaction and synthetic starch-vinyl acetate cross-connect graft copolymer;
(2) starch-vinyl acetate cross-connect graft copolymer mixes with auxiliary agent: starch-vinyl acetate cross-connect graft copolymer is under neutrallty condition, with polyvinyl alcohol 124 is properties-correcting agent, with the borax is the secondary crosslinking agent, after the gelatinization, with urea is thinner, glycerine is softening agent, and tributyl phosphate is a defoamer, obtains water resistant starch-base timber adhesive after the mixing.
2. method according to claim 1, it is characterized in that the synthetic of starch-vinyl acetate cross-connect graft copolymer, with starch is raw material, be mixed with mass percentage concentration and be 30%~40% starch emulsion after, be catalyzer with hydrochloric acid, ammonium persulphate is an initiator, add and to account for starch quality than 75%~85% Vinyl Acetate Monomer, in the scope of pH3~5, slowly graft copolymerization is carried out in dropping, the graft reaction temperature is 60~70 ℃, 2~4 hours graft reaction time; At graft reaction after 1~2 hour, add account for starch quality than be 0.2%~0.4%, mass concentration is 1%~2% N, N '-methylene-bisacrylamide linking agent, reinforced and reaction is all under agitation carried out, and reaction product is starch-vinyl acetate cross-connect graft copolymer.
3. method according to claim 1, it is characterized in that adding auxiliary agent and be mixed into tackiness agent, with synthetic starch-vinyl acetate cross-connect graft copolymer is main raw material, it is 10%~15% that adding accounts for the starch quality ratio, mass concentration is 5%~10% polyvinyl alcohol 124, it is 0.1%~0.2% that adding accounts for the starch quality ratio, mass concentration is 0.5%~1% borax, it is 10%~15% that adding accounts for the starch quality ratio, mass concentration is 5%~10% urea, add and account for starch quality than the glycerine that is 10%~15%, add and account for starch quality than the tributyl phosphate that is 2%~5%, reinforced and mixing is all under agitation carried out, and mix products is a water resistant starch-base timber adhesive.
4. the application with the water resistant starch-base timber adhesive of the described method preparation of claim 1 is characterized in that being mainly used in adhesive bonding of wood.
CNB2006101560256A 2006-12-28 2006-12-28 Preparation process and application of water resistant starch-base timber adhesive CN100415845C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2006101560256A CN100415845C (en) 2006-12-28 2006-12-28 Preparation process and application of water resistant starch-base timber adhesive

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Application Number Priority Date Filing Date Title
CNB2006101560256A CN100415845C (en) 2006-12-28 2006-12-28 Preparation process and application of water resistant starch-base timber adhesive

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CN100415845C true CN100415845C (en) 2008-09-03

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CN101643633B (en) * 2009-08-26 2011-06-15 江南大学 Method for preparing bond for corrugated board by using potato residue as raw material
CN102086360B (en) * 2010-12-07 2012-09-19 江南大学 Modified starch-based wood adhesive as well as preparation method and application thereof
CN102559107A (en) * 2010-12-17 2012-07-11 浙江科技学院 Preparation method of adhesive for producing corrugated cardboard
CN102533182A (en) * 2010-12-23 2012-07-04 浙江科技学院 Method for preparing starch-based water-resistant adhesive for corrugated board production
CN103074012B (en) * 2011-10-26 2014-08-13 佛山海特化工科技有限公司 Special-purposed starch for producing white latex, and preparation method thereof
CN102558614B (en) * 2012-02-16 2015-08-19 江南大学 A kind of preparation method of starch-based biological latex
CN102632535B (en) * 2012-04-10 2015-04-29 江南大学 Preparation method of aldehyde-free artificial board
CN102676098B (en) * 2012-06-11 2014-01-15 合肥工业大学 Modified-starch-based wood adhesive and preparation method thereof
CN102952239B (en) * 2012-11-15 2015-04-29 永港伟方(北京)科技股份有限公司 Starch derivative biological latex and preparation method and application thereof
CN103540276A (en) * 2013-09-29 2014-01-29 安徽华印机电股份有限公司 Preparation method of potato starch adhesive and application of adhesive
GB2527023A (en) * 2014-03-31 2015-12-16 Univ Leicester Polysaccharide-based materials
CN105176457B (en) * 2015-07-29 2017-06-06 湖南工业大学 A kind of environment-friendly water-based adhesive
CN105349051A (en) * 2015-10-28 2016-02-24 阜阳市豪杰工贸有限公司 Carton adhesive with good waterproof effect
CN105885111A (en) * 2016-05-30 2016-08-24 蚌埠市维光塑胶制品有限公司 Plastic bag easy to degrade
CN106318266A (en) * 2016-08-22 2017-01-11 广西南宁桂尔创环保科技有限公司 Novel wood environment-friendly adhesive
CN106147651A (en) * 2016-08-22 2016-11-23 广西南宁桂尔创环保科技有限公司 A kind of novel timber adhesive
CN106047217A (en) * 2016-08-22 2016-10-26 广西南宁桂尔创环保科技有限公司 Environment-friendly wood adhesive
CN106244046A (en) * 2016-08-22 2016-12-21 广西南宁桂尔创环保科技有限公司 A kind of novel environment friendly adhesive
CN106047216A (en) * 2016-08-22 2016-10-26 广西南宁桂尔创环保科技有限公司 Wood adhesive
CN106221611A (en) * 2016-08-22 2016-12-14 广西南宁桂尔创环保科技有限公司 A kind of Environment-friendlyadhesive adhesive
CN109266265B (en) * 2018-09-14 2019-10-25 江南大学 A kind of thermosetting property wood-based plate starch adhesive and preparation method thereof

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US5863341A (en) * 1994-06-21 1999-01-26 Miller; Ray Ramsay Method of preparing a starch adhesive and products of the method
CN1687279A (en) * 2005-05-18 2005-10-26 江南大学 Method for preparing starch glue for lumber

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5863341A (en) * 1994-06-21 1999-01-26 Miller; Ray Ramsay Method of preparing a starch adhesive and products of the method
CN1687279A (en) * 2005-05-18 2005-10-26 江南大学 Method for preparing starch glue for lumber

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