CN101503509A - Waterproof resin - Google Patents

Abstract

The invention discloses a waterproof resin. The waterproof resin comprises the following components in weight percentages: 14-19% of soya oil acid, 7-13% of glycerol, 8-15% of phthalic anhydride, 2-6% of fumaric acid, 1-4% of pentaerythritol, 4-10% of rosin, 1-5% of E-20 epoxy resin, 0.1-0.5% of hypophosphorous acid, 2-6% of xylene and 40-50% of toluene; the preparation comprises the following steps: diluting the glycerol with water; adding the soya oil acid, the glycerol, the phthalic anhydride, the fumaric acid, the pentaerythritol, the rosin, the E-20 epoxy resin and the hypophosphorous acid; adding 20%-50% of the xylene to react for 0.5-1.5 hours at 170 DEG C, adding the rest xylene to react for 0.5-1.5 hours at 180 DEG C; heating to 204-208 DEG C, cooling after refluxing to an acid value not more than 4mgKOH/g and viscosity not less than 3sec/grille with water; and using toluene to dilute reaction product after cooling to below 150 DEG C.

Description

Waterproof resin

Technical field

The present invention relates to the material field, the waterproof resin that particularly a kind of suitable sand paper is used.

Background technology

At present, the resin that uses on the Sand paper for polishing, exist various shortcomings, big as viscosity height, the smell of resin, sticking power is bad, rate of drying is slow, gloss is too high after the resin film forming, penetrating quality is bad, water resistance is bad, the resin drying rear surface is easy to generate bubble and shrink easily.Common urea formaldehyde resin glue for example, though its low price, water and wet steam can make glue-line hydrolysis gradually, destroy, and adhesion durability is relatively poor, and bonding strength is on a declining curve along with the migration of time; Also having in the glue-line has free formaldehyde to discharge, and contaminate environment is harmful.

Summary of the invention

The objective of the invention is to solve the problems of the prior art, a kind of waterproof resin is provided.

Technical scheme of the present invention is: waterproof resin, and its weight percent consists of: behenic acid 14～19%, glycerol 7～13%, Tetra hydro Phthalic anhydride 8～15%, fumaric acid 2～6%, tetramethylolmethane 1～4%, rosin 4～10%, E-20 Resins, epoxy 1～5%, ortho phosphorous acid 0.1～0.5%, dimethylbenzene 2～6%, toluene 40～50%;

Above-mentioned raw materials prepares through following steps: (1) dilutes glycerol with 2.5～3.5 times water; (2) behenic acid, glycerol, Tetra hydro Phthalic anhydride, fumaric acid, tetramethylolmethane, rosin, E-20 Resins, epoxy, the ortho phosphorous acid of adding formula ratio in the reactor; (3) heating, under 170 ℃ of heat-retaining conditions, 20%～50% of dimethylbenzene reacted 0.5～1.5 hour in the adding prescription, heated up, and adds remaining dimethylbenzene again and reacted 0.5～1.5 hour under 180 ℃ of heat-retaining conditions; (4) be warming up to 204～208 ℃, carry out branch water and reflux,, lower the temperature behind viscosity 〉=3 second/lattice to acid value≤4mgKOH/g; (5) be cooled to below 150 ℃, add the dilution with toluene reactant of formula ratio, obtain the waterproof resin finished product.

The invention has the beneficial effects as follows: the viscosity of resin is low, sticking power good, rate of drying is fast, gloss is low after the resin film forming, penetrating quality good, water resistance is excellent, the resin drying rear surface is not easy to produce bubble, coating surface does not shrink, the surface of paint film has good elasticity simultaneously.

Embodiment

Embodiment 1.

Waterproof resin, its weight percent consists of: behenic acid 14%, glycerol 9%, Tetra hydro Phthalic anhydride 13%, fumaric acid 3%, tetramethylolmethane 2%, rosin 9%, E-20 Resins, epoxy 1%, ortho phosphorous acid 0.1%, dimethylbenzene 4%, toluene 44.9%;

Above-mentioned raw materials prepares through following steps: (1) dilute with water glycerol, Dilution ratio are 3: 1; (2) logical nitrogen in the reactor, behenic acid, glycerol, Tetra hydro Phthalic anhydride, fumaric acid, tetramethylolmethane, rosin, E-20 Resins, epoxy, the ortho phosphorous acid of adding formula ratio; (3) heat temperature raising, material add 30% reaction 1 hour of dimethylbenzene in the prescription under 170 ℃ of heat-retaining conditions, add remaining dimethylbenzene reaction 1 hour subsequently under 180 ℃ of heat-retaining conditions; (4) be warming up to 204～208 ℃, carry out reflux water-dividing reaction,, behind viscosity 〉=3 second/lattice, begin cooling as the acid value≤4mgKOH/g that under 25 ℃ of conditions, records material; (5) be cooled to below 150 ℃, add the dilution with toluene reactant of formula ratio, obtain the waterproof resin finished product.

Embodiment 2.

Waterproof resin, its compositions in weight percentage is: behenic acid 18%, glycerol 11%, Tetra hydro Phthalic anhydride 12%, fumaric acid 3%, tetramethylolmethane 2%, rosin 4%, E-20 Resins, epoxy 1%, ortho phosphorous acid 0.1%, dimethylbenzene 4%, toluene 44.9%; Its preparation process is with embodiment 1.

The using method of product of the present invention: take by weighing product waterproof resin 100g of the present invention, CYMEL-303 aminoresin 5 grams, 50% tosic acid ethanolic soln, 0.1 gram uniform mixing, be rolled onto said mixture on the sand paper equably, again sand paper being put into temperature is 150 ℃ baking oven, toasted 5 minutes, and just made the sand paper that has waterproof resin.

The detection method of above-mentioned sand paper waterproof effect is as follows: the India ink acetone soln with 1% drips on above-mentioned sand paper, can see clearly that the India ink acetone soln can not penetrate sand paper, proves that this resin has favorable waterproof property.

The Performance Detection of waterproof resin of the present invention is as follows:

Sequence number	Project	Index	Detected result	The method of inspection
					1	Viscosity, mpa.s/25 ℃	≤250	180	GB/T?1723
2	Sticking power, level	≤1	1	GB/T?9286
					3	Time of drying (150 ℃)	≤10min	5	GB/T?1728
4	Gloss (60 °), %	≤80	50	GB/T?9754
					5	Elasticity	≤1	1	GB/T?1731
6	Water tolerance, 36h	Non-foaming, allow slightly to change, can restore in 3h	72h, not bubble	GB/T?1733
					7	Perviousness (soaking 36h)	Can not penetrate sand paper	72h, can not penetrate sand paper	Range estimation

The performance comparison of waterproof resin of the present invention and CD-502-70 Synolac detects as follows:

Sequence number

Project

Index

Waterproof resin of the present invention

The comparative resin performance

The method of inspection

1	Sticking power, level	≤1	1	2	GB/T?9286
						2	Time of drying (150 ℃), min	≤10min	5	15	GB/T?1728

Claims (1)

1. waterproof resin, it is characterized in that: its weight percent consists of: behenic acid 14～19%, glycerol 7～13%, Tetra hydro Phthalic anhydride 8～15%, fumaric acid 2～6%, tetramethylolmethane 1～4%, rosin 4～10%, E-20 Resins, epoxy 1～5%, ortho phosphorous acid 0.1～0.5%, dimethylbenzene 2～6%, toluene 40～50%;

Above-mentioned raw materials prepares through following steps: (1) dilutes glycerol with 2.5～3.5 times water; (2) behenic acid, glycerol, Tetra hydro Phthalic anhydride, fumaric acid, tetramethylolmethane, rosin, E-20 Resins, epoxy, the ortho phosphorous acid of adding formula ratio in the reactor; (3) heating, under 170 ℃ of heat-retaining conditions, 20%～50% of dimethylbenzene reacted 0.5～1.5 hour in the adding prescription, heated up, and adds remaining dimethylbenzene again and reacted 0.5～1.5 hour under 180 ℃ of heat-retaining conditions; (4) be warming up to 204～208 ℃, carry out branch water and reflux,, lower the temperature behind viscosity 〉=3 second/lattice to acid value≤4mgKOH/g; (5) be cooled to below 150 ℃, add the dilution with toluene reactant of formula ratio, obtain the waterproof resin finished product.