CN1180090A

CN1180090A - Water base high molecular water-proof paint

Info

Publication number: CN1180090A
Application number: CN 96112893
Authority: CN
Inventors: 安和平
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-09-20
Filing date: 1996-09-20
Publication date: 1998-04-29
Anticipated expiration: 2016-09-20
Also published as: CN1059222C

Abstract

The present invention relates to a water-based polymeric water-proof paint. It is an improvement on water-proof paint using ethylene-vinyl acetate copolymer as substrate material. Said invention uses cheap leftover of ethylene industry-ethylene tar as modifying agent, and adds plasticizer, dispersing aid, filler, colouring material and a proper quantity of water so as to regulate system viscosity. After modified, the flexibility, resistance to ripping, water-proofing property and adhesiveness of said water-proof paint are improved, and its cost is low, service life is long.

Description

Water base high molecular water-proof paint

The present invention relates to a kind of water base high molecular water-proof paint, belong to the coating composition technical field that contains acetate ethylene copolymer.

A class is a major ingredient with pitch and emulsified bitumen in the used waterproof paint of building trade, is characterized in that cost is low, but poor-performing, construction technology is also undesirable; Another kind of is major ingredient with various macromolecular materials, as chloroprene rubber, acrylate, Polyurethane and polystyrene paint, though performance increases, has defectives such as the big or poorly water-soluble of cost height, toxicity in various degree.At application number is that a key name of 94113969 is that proposing with ethene-sour ethylene copolymer liquid in the invention of colour waterproof elastic paint is the technical scheme that base-material is produced waterproof paint, represented a new trend of domestic construction waterproof paint industry, but the water tolerance of this coating, cohesiveness and tear strength remain to be improved, and cost is still higher.

The objective of the invention is to disclose a kind of water base high molecular water-proof paint,, improve water tolerance, cohesiveness and the tear strength of filming, and reduce product cost by modification to ethene-vinyl acetate.

Task of the present invention is achieved in that being base-material with the ethene-vinyl acetate copolymer fluid, comprise in the coating composition of auxiliary agent, filler, colorant and defoamer, add the ethylene bottom oil modification, the weight ratio of ethene-vinyl acetate and ethylene bottom oil is 1: 0.4～0.6.

Ethene-vinyl acetate is that the coating of base-material has good flexibility, wet viscosity and water-fast weather resisteant, use cheap modified by tar, can improve the flexibility and the tear strength of filming, improve its water tolerance and cohesiveness, and make cost decreases, be the highest in the present at home all water base high molecular water-proof paints of its ratio of performance to price.This coating all has good cohesiveness and water-repellancy to flexible waterproof sheet, rigidity cement sand pulp, can use separately and form simple property waterproof layer, also can be used the reinforcement waterproof layer of formation " cloth four glue " with woven fiber glass or non-woven fabrics, long service life, production technique is simpler, can obtain favorable economic benefit and social benefit.

Below in conjunction with embodiment, the present invention is specified.

Ethene-vinyl acetate copolymer fluid and ethylene bottom oil are two kinds of fundamental components in the coating, and amount ratio is 1: 0.4-0.6; Comprise emulsifier op-10 commonly used and softening agent O-phthalic ester class in the auxiliary agent, filler is that coarse whiting, fine particle calcium carbonate and talcum powder are main, also contains micro-colorant and silicone oil defoamer; Wherein auxiliary dosage accounts for total amount 0.5-2%, and amount of filler accounts for total amount 20-35%.

The ethene-vinyl acetate molecular structure is as follows:

The introducing of ethene makes ethanoyl discontinuous, and it is soft that high polymer main chain becomes, and increases intermolecular reactivity, thereby improves its cohesiveness, and the introducing of nonpolar vinyl also is very favourable to the water tolerance that improves multipolymer in addition.

Tar and pitch often are used to waterproof paint, directly, and through modification, or as properties-correcting agent.Because the property of ethene-aldehydic acid ethylene copolymer, carry out in the modified test in introducing tar-bitumen class, we find to be used at present pitch, the tar class of waterproof paint, all improper as various trade mark petroleum pitch, crude oil and coal tar wet goods, not caking, do not have the front modifying function exactly.Analyzing its reason, may be these tar or pitch composition complexity, and performance differs, and is not suitable for this specific high-molecular copolymer of ethene-aldehydic acid ethene.We select heavy oil cracking to extract behind the ethene subordinate of gained to expect-be commonly called as ethylene bottom oil, succeed at last.This tar, the average mark subchain is shorter, mainly contains the alkane olefines, the aromatic hydrocarbon amount is few.Test shows that the introducing of ethylene bottom oil can make copolymer pellet softening, increases flowability and cohesiveness.And the multipolymer that has been softened can quicken cohesion, the water tolerance of improving workability and filming.Say that relatively the composition of ethylene bottom oil is more stable, the technology controlling and process of modification is realized easily.The consumption of ethylene bottom oil is the 2/5-3/5 of multipolymer, looks time in the modifying process, color and viscosity change and the adjustment of product performance measured value.

The affiliation that adds of auxiliary agent and filler constantly increases the viscosity of system in the modifying process, cause and stir difficulty, also influence simultaneously the workability and the due solids content of product, add the viscosity degradation that less water can make system, do not influence other fundamental propertys of product.This is a characteristic of ethene-aldehydic acid ethene water-based paint.The add-on of water is generally 2-4%, is preferably deionized water, and system is actual moisturely the highlyest to be no more than 7%.The variation of consumption mainly is subjected to filler and climatic influences.The filler fine size, surface-area is big, makes the system retrogradation easily, needs to increase water consumption; And when having a humid climate, thin filler adsorbs steam again easily, needs to reduce the water yield of adding again.Content of water in system is too much, and filler can precipitate.

Another characteristics of this product are that complete processing is simpler: ambient operation more than 15 ℃, to stir in ethene-vinyl acetate copolymer fluid and the ethylene bottom oil adding reactor, elder generation adds 1/2nd filler, breakpoint adding assistant not in the whipping process, look the foaming degree, add the silicone oil froth breaking, add water and adjust viscosity.Cross colloidal mill then No. one time.Add all the other fillers again and continue to stir, drip defoamer and water, become golden yellow until system.Cross colloidal mill for the second time.Total whip modified time 30-45 branch.

This coating main performance index such as table 1, adhesive property such as table 2, economic benefit is relatively as table 3.As table 3.The fundamental property of table 1 water base high molecular water-proof paint

Project	Viscosity	Time of drying (hour)	Low temperature flexibility	Thermotolerance	Unit elongation
Project	Viscosity	Time of drying (hour)	Low temperature flexibility	Thermotolerance	Unit elongation	(being coated with-4 glasss) second	Surface drying is done solid work	-40 ℃ of φ 30mm rods around	2 ℃ in 100 soil	???％
	?????85	????2????＜24	Non-cracking, vertical hanging	There is not trickling	??180	(being coated with-4 glasss) second	Surface drying is done solid work	-40 ℃ of φ 30mm rods around	2 ℃ in 100 soil	???％

The adhesive property of table 2 coating and coiled material, asphalt felt

	The bonding separability
	The bonding separability		Stripping strength N/cm ²	Collapse mode
	Chlorinatedpolyethylene coiled material-waterproof paint	????20.50	Stripping strength N/cm ²	Collapse mode	The cohesive failure of filming
Asphalt felt-waterproof paint	Chlorinatedpolyethylene coiled material-waterproof paint	????20.50	????5.07	Malthoid destroys	The cohesive failure of filming

Table 3 economic benefit relatively

Title material	Thickness mm	Material unit price unit/m ²	Waterproof layer cost unit/m ²	Constructional method
Title material	Thickness mm	Material unit price unit/m ²	Waterproof layer cost unit/m ²	Constructional method	The SBS modified asphalt felt	????3-4	??10-14	??????13-15	Two felts, three oily heat constructions
The neoprene latex reclaimed rubber asphalt waterproofing paint	????2	??10-12	??????15-18	The construction of two cloth, six oil coolings	The SBS modified asphalt felt	????3-4	??10-14	??????13-15	Two felts, three oily heat constructions
	????2	??10-12	??????15-18	The construction of two cloth, six oil coolings	The polyurethane coating film waterproof paint	???1-1.3	??24-30	??????30-35	Brushing 3-6 is all over cold construction
This product	??1.2-1.5	???8-10	??????12-14	One cloth 3-5 is all over cold construction	The polyurethane coating film waterproof paint	???1-1.3	??24-30	??????30-35	Brushing 3-6 is all over cold construction

Claims

1, a kind of water base high molecular water-proof paint, with the ethene-vinyl acetate copolymer fluid is base-material, comprise auxiliary agent, filler, colorant and defoamer, it is characterized in that also adding the ethylene bottom oil modification in said composition, the weight ratio of ethene-vinyl acetate and ethylene bottom oil is 1: 0.4～0.6.

2, by the described water base high molecular water-proof paint of claim 1, it is characterized in that containing in the described auxiliary agent OP-10 class emulsifying agent, the O-phthalic ester plasticizer, amount of auxiliary accounts for system total amount 0.5-2% amount of filler and accounts for total amount 20-35%.

3, by claim 1 or 2 described water base high molecular water-proof paints, it is characterized in that also containing water in the described coating composition, content of water in system is no more than 7%.