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Pressure-sensitive flame retardant adhesive

A technology for adhesives and compositions, applied in the direction of adhesive types, ester copolymer adhesives, adhesives, etc., can solve the problems of no longer satisfying, reducing adhesive viscosity, etc.

Inactive Publication Date: 2001-01-31
ASHLAND LICENSING & INTPROP LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will reduce the tackiness of the adhesives to such an extent that they no longer meet the desired fiber placement tolerances

Method used

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  • Pressure-sensitive flame retardant adhesive
  • Pressure-sensitive flame retardant adhesive

Examples

Experimental program
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Effect test

Embodiment 1

[0034] By using 1% vinylphosphonic acid (18g), 50% 2-ethylhexyl acrylate (900g), 26% n-butyl acrylate (468g) and 23% dibromostyrene (414g) (percentages are by weight Calculated) for emulsion polymerization.

[0035] The reactor was charged with 954 g of deionized water and purged with nitrogen while heating to 80°C. A polymerization initiator consisting of 9.0 g of ammonium persulfate dissolved in 45.0 g of deionized water was added to the reactor. Fifteen minutes after the addition of the initiator, the monomer pre-emulsion was fed, which consisted of 414 g of deionized water, 45.0 g of RHODAPEX CO-436 (ammonium salt of sulfated nonylphenoxy(ethyleneoxy)ethanol trade name, purchased from Rhone-Poulenc), 14.4g ammonia (29%), 18.0g vinylphosphonic acid, 900g 2-ethylhexyl acrylate, 468g n-butyl acrylate, and 414g dibromostyrene composition. The pre-emulsion was added uniformly (9.47 grams per minute) over a period of 4 hours with the reactor under a nitrogen atmosphere. The ...

Embodiment 2

[0041] The product of 2326g embodiment 1 and 6.3g 29%NH 4 OH, 4.65 g DREWPLUSL-475 (trade name for nonionic defoamers including blends of mineral oil and silica derivatives, sold by Drew Industrial Division), 94.6 g ALCOGUM L-31 (acrylic emulsion copolymer Thickener trade name, sold by Alco Chemical Corp), and 20 g of deionized water were compounded. This product had a non-volatile content of 52.1%, a viscosity of 2015 cps at 25°C, and a pH of 8.41. This product has the properties listed in the first column of Table 1 below. per 12 Sb 2 o 3 The ratio of 100 parts of solid copolymer solids (192.3g copolymer compounded in the same way as above) was obtained by mixing with 20g AQUAMIX 104 (containing 60% Sb 2 o 3 The trademark of the aqueous dispersion of , sold by Harwick Chemical) mixing, dispersed Sb in the compounded product 2 o 3 , reaching a yield of 212.3g. The wet adhesive was cast on a bleached kraft silicone release liner, air dried for 15 minutes, cured at 200°...

Embodiment 3

[0042] Embodiment 3 intermediate polymer solution A

[0043] Using 5% vinylphosphonic acid (60g), 35% 2-ethylhexyl acrylate (420g), 35% n-butyl acrylate (420g), 23% dibromostyrene (138g), and 2% acrylic acid ( 24 g), together with 520.5 g of toluene and 1.25 g of TRIGANOX 29 (1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane) dissolved in 50 g of toluene, started Perform solution polymerization. This solution was added to a 2.5 gallon nitrogen purged stainless steel reactor with stirring (120-130 rpm).

[0044] The reactor contents were heated to 103 / 104°C and held at 104°C for 15 minutes. Then, over a period of 3 hours under stirring, 60 g of vinylphosphonic acid, 420 g of 2-ethylhexyl acrylate, 420 g of n-butyl acrylate, 414 g of dibromostyrene, and 24 g of acrylic acid, together with 668.9 g of toluene and A delayed-feed monomer solution consisting of 1.51 g TRIGANOX 29 dissolved in 50 g toluene was fed uniformly into the reactor (114 g / min) whil...

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Abstract

The present invention discloses a pressure-sensitive, flame-retardant adhesive comprising a composition fabricated with the polymerization of acrylic esters, dibromostyrene, and vinyl phosphonic acid, with or without acrylic acid, mixed with dispersions of antimony trioxide. The adhesive composition preferably is an emulsion polymer fabricated with dibromostyrene, 2-ethylhexyl acrylate, nbutyl acrylate, and vinyl phospohonic acid, mixed with Sb2O3 in an approximate ratio of 100 parts polymer per about 8-12 parts Sb2O3. Preferred polymers are those containing at least about 11.6 % to 15.6 % bromine and from 0.25 % to 2.5 % phosphorous. The adhesive is particularly advantageous in fabricating optical circuit devices.

Description

field of invention [0001] The present invention relates to pressure-sensitive, flame-retardant adhesives, and more particularly to adhesive compositions obtained by solution or emulsion polymerization of one or more acrylates, dibromostyrene, and vinylphosphoric acid, wherein Antimony trioxide is compounded. For solution polymerization, acrylic acid is also introduced into the polymerization mixture. Background of the invention [0002] A pressure sensitive adhesive is defined as a substance which, when in dry form, is actively and permanently tacky at room temperature so as to be secure by contact without the need for finger or hand pressure (low pressure) Adhesively to a variety of different surfaces. The molecular weights of polymers useful as pressure sensitive adhesives cover a wide range, depending on their type, composition, structure, and method of polymerization. They are available in a variety of basic chemistries and are ideally formulated to possess a balance ...

Claims

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Application Information

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IPC IPC(8): C09J133/08C08F220/10C08F230/02C09J4/00C09J133/06
CPCC09J4/00C09J133/062C08F220/12C08F220/1808C09J11/04C09J133/08C08F230/02C08F220/10
Inventor 彼得·A·尤尔奇科约翰·约瑟夫·布拉克
Owner ASHLAND LICENSING & INTPROP LLC
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